From 2c262e1077c5830dff3c50239a6150670bd0f403 Mon Sep 17 00:00:00 2001 From: "zodiac@gmail.com" Date: Sat, 4 Sep 2010 17:50:11 +0000 Subject: [PATCH] Added an optional on-screen keyboard. Must be activated by the user by selecting the option in the context-menu. git-svn-id: https://shellinabox.googlecode.com/svn/trunk@221 0da03de8-d603-11dd-86c2-0f8696b7b6f9 --- ChangeLog | 5 + Makefile.am | 31 +- Makefile.in | 42 +- config.h | 2 +- configure | 2 +- configure.ac | 2 +- demo/keyboard.png | Bin 0 -> 808 bytes demo/styles.css | 215 +++++++---- demo/vt100.js | 643 +++++++++++++++++++++++++------ shellinabox/keyboard-layout.html | 59 +++ shellinabox/keyboard.png | Bin 0 -> 808 bytes shellinabox/shell_in_a_box.js | 2 +- shellinabox/shellinaboxd.c | 5 + shellinabox/styles.css | 215 +++++++---- shellinabox/vt100.js | 643 +++++++++++++++++++++++++------ shellinabox/vt100.jspp | 641 ++++++++++++++++++++++++------ 16 files changed, 2026 insertions(+), 481 deletions(-) create mode 100644 demo/keyboard.png create mode 100644 shellinabox/keyboard-layout.html create mode 100644 shellinabox/keyboard.png diff --git a/ChangeLog b/ChangeLog index d7ea959..2e216b0 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2010-09-04 Markus Gutschke + + * Added an optional on-screen keyboard. Must be activated by the + user by selecting the option in the context-menu. + 2010-09-03 Markus Gutschke * Fix some scaling related issues. This fix is thanks to some diff --git a/Makefile.am b/Makefile.am index 3a07cd3..2f28df2 100644 --- a/Makefile.am +++ b/Makefile.am @@ -32,6 +32,7 @@ EXTRA_DIST = INSTALL.Debian \ demo/demo.jspp \ demo/demo.xml \ demo/enabled.gif \ + demo/keyboard.png \ demo/styles.css \ demo/print-styles.css \ demo/vt100.js \ @@ -106,6 +107,8 @@ shellinaboxd_SOURCES = shellinabox/shellinaboxd.c \ shellinabox/print-styles.css \ shellinabox/enabled.gif \ shellinabox/favicon.ico \ + shellinabox/keyboard.png \ + shellinabox/keyboard-layout.html \ shellinabox/beep.wav \ config.h shellinaboxd_LDADD = liblogging.la \ @@ -148,7 +151,9 @@ libtool: $(LIBTOOL_DEPS) ${top_srcdir}/demo/demo.js: ${top_srcdir}/demo/beep.wav \ ${top_srcdir}/demo/demo.jspp \ + ${top_srcdir}/demo/enabled.gif \ ${top_srcdir}/demo/favicon.ico \ + ${top_srcdir}/demo/keyboard.png \ ${top_srcdir}/demo/styles.css \ ${top_srcdir}/demo/print-styles.css \ ${top_srcdir}/demo/vt100.js \ @@ -169,6 +174,10 @@ ${top_srcdir}/demo/favicon.ico: ${top_srcdir}/shellinabox/favicon.ico @rm -f "$@" ln "$?" "$@" +${top_srcdir}/demo/keyboard.png: ${top_srcdir}/shellinabox/keyboard.png + @rm -f "$@" + ln "$?" "$@" + ${top_srcdir}/demo/styles.css: ${top_srcdir}/shellinabox/styles.css @rm -f "$@" sed -e '/\[if DEFINES_COLORS\]/,/\[endif DEFINES_COLORS\]/d' "$?" >"$@" @@ -197,7 +206,8 @@ ${top_srcdir}/demo/vt100.js: ${top_srcdir}/shellinabox/vt100.js @rm -f "$@" ln "$?" "$@" -shellinaboxd.1: shellinabox/shellinaboxd.man.in config.h +shellinaboxd.1: ${top_srcdir}/shellinabox/shellinaboxd.man.in \ + ${top_srcdir}/config.h @src="${top_srcdir}/shellinabox/shellinaboxd.man.in"; \ echo preprocess "$$src" '>'"$@"; \ if sed -e 's/^#define \([^ ]*\).*/\1/' -e t -e d config.h | \ @@ -253,6 +263,13 @@ clean-local: $(OBJCOPY) --add-section .note.GNU-stack=GNU-stack "$@"; \ rm -f GNU-stack +.png.o: + @echo $(OBJCOPY) "$<" "$@" + @$(OBJCOPY) -I binary `$(objcopyflags)` `echo "$<" | $(renamesymbols)`\ + "$<" "$@" + @-printf '\000' >GNU-stack && \ + $(OBJCOPY) --add-section .note.GNU-stack=GNU-stack "$@"; \ + rm -f GNU-stack .html.o: @echo $(OBJCOPY) "$<" "$@" @@ -272,15 +289,23 @@ clean-local: rm -f GNU-stack -shellinabox/shell_in_a_box.o: shellinabox/shell_in_a_box.js config.h +shellinabox/shell_in_a_box.o: ${top_srcdir}/shellinabox/shell_in_a_box.js \ + ${top_srcdir}/config.h + +${top_srcdir}/shellinabox/vt100.js: ${top_srcdir}/shellinabox/vt100.jspp \ + ${top_srcdir}/shellinabox/keyboard-layout.html .jspp.js: @echo preprocess "$<" "$@" - @sed -e "`sed -e 's/^#define *\([^ ]*\) *\(.*\)/\/^[^#]\/s\/\1\/\2 \\\\\/* \1 *\\\\\/\/g/' \ + @kbd=`while read i; do \ + printf '%s' "\`echo "$$i" | sed 's/&/\\\\\\&/g'\`"; \ + done <${top_srcdir}/shellinabox/keyboard-layout.html`; \ + sed -e "`sed -e 's/^#define *\([^ ]*\) *\(.*\)/\/^[^#]\/s\/\1\/\2 \\\\\/* \1 *\\\\\/\/g/' \ -e t \ -e d "$<"`" \ -e "s/^#/\/\/ #/" \ -e "s/VERSION/\"@VERSION@ (revision @VCS_REVISION@)\"/g" \ + -e "s%KEYBOARD%'$${kbd}'%" \ "$<" >"$@" .js.o: diff --git a/Makefile.in b/Makefile.in index 50c8272..018f234 100644 --- a/Makefile.in +++ b/Makefile.in @@ -82,6 +82,8 @@ am_shellinaboxd_OBJECTS = shellinaboxd.$(OBJEXT) \ shellinabox/styles.$(OBJEXT) \ shellinabox/print-styles.$(OBJEXT) \ shellinabox/enabled.$(OBJEXT) shellinabox/favicon.$(OBJEXT) \ + shellinabox/keyboard.$(OBJEXT) \ + shellinabox/keyboard-layout.$(OBJEXT) \ shellinabox/beep.$(OBJEXT) shellinaboxd_OBJECTS = $(am_shellinaboxd_OBJECTS) shellinaboxd_DEPENDENCIES = liblogging.la libhttp.la @@ -288,6 +290,7 @@ EXTRA_DIST = INSTALL.Debian \ demo/demo.jspp \ demo/demo.xml \ demo/enabled.gif \ + demo/keyboard.png \ demo/styles.css \ demo/print-styles.css \ demo/vt100.js \ @@ -366,6 +369,8 @@ shellinaboxd_SOURCES = shellinabox/shellinaboxd.c \ shellinabox/print-styles.css \ shellinabox/enabled.gif \ shellinabox/favicon.ico \ + shellinabox/keyboard.png \ + shellinabox/keyboard-layout.html \ shellinabox/beep.wav \ config.h @@ -407,7 +412,7 @@ all: config.h $(MAKE) $(AM_MAKEFLAGS) all-am .SUFFIXES: -.SUFFIXES: .c .css .gif .html .ico .js .jspp .lo .o .obj .wav +.SUFFIXES: .c .css .gif .html .ico .js .jspp .lo .o .obj .png .wav am--refresh: @: $(srcdir)/Makefile.in: $(srcdir)/Makefile.am $(am__configure_deps) @@ -537,6 +542,10 @@ shellinabox/enabled.$(OBJEXT): shellinabox/$(am__dirstamp) \ shellinabox/$(DEPDIR)/$(am__dirstamp) shellinabox/favicon.$(OBJEXT): shellinabox/$(am__dirstamp) \ shellinabox/$(DEPDIR)/$(am__dirstamp) +shellinabox/keyboard.$(OBJEXT): shellinabox/$(am__dirstamp) \ + shellinabox/$(DEPDIR)/$(am__dirstamp) +shellinabox/keyboard-layout.$(OBJEXT): shellinabox/$(am__dirstamp) \ + shellinabox/$(DEPDIR)/$(am__dirstamp) shellinabox/beep.$(OBJEXT): shellinabox/$(am__dirstamp) \ shellinabox/$(DEPDIR)/$(am__dirstamp) shellinaboxd$(EXEEXT): $(shellinaboxd_OBJECTS) $(shellinaboxd_DEPENDENCIES) @@ -549,6 +558,8 @@ mostlyclean-compile: -rm -f shellinabox/cgi_root.$(OBJEXT) -rm -f shellinabox/enabled.$(OBJEXT) -rm -f shellinabox/favicon.$(OBJEXT) + -rm -f shellinabox/keyboard-layout.$(OBJEXT) + -rm -f shellinabox/keyboard.$(OBJEXT) -rm -f shellinabox/print-styles.$(OBJEXT) -rm -f shellinabox/root_page.$(OBJEXT) -rm -f shellinabox/shell_in_a_box.$(OBJEXT) @@ -1162,7 +1173,9 @@ libtool: $(LIBTOOL_DEPS) ${top_srcdir}/demo/demo.js: ${top_srcdir}/demo/beep.wav \ ${top_srcdir}/demo/demo.jspp \ + ${top_srcdir}/demo/enabled.gif \ ${top_srcdir}/demo/favicon.ico \ + ${top_srcdir}/demo/keyboard.png \ ${top_srcdir}/demo/styles.css \ ${top_srcdir}/demo/print-styles.css \ ${top_srcdir}/demo/vt100.js \ @@ -1183,6 +1196,10 @@ ${top_srcdir}/demo/favicon.ico: ${top_srcdir}/shellinabox/favicon.ico @rm -f "$@" ln "$?" "$@" +${top_srcdir}/demo/keyboard.png: ${top_srcdir}/shellinabox/keyboard.png + @rm -f "$@" + ln "$?" "$@" + ${top_srcdir}/demo/styles.css: ${top_srcdir}/shellinabox/styles.css @rm -f "$@" sed -e '/\[if DEFINES_COLORS\]/,/\[endif DEFINES_COLORS\]/d' "$?" >"$@" @@ -1211,7 +1228,8 @@ ${top_srcdir}/demo/vt100.js: ${top_srcdir}/shellinabox/vt100.js @rm -f "$@" ln "$?" "$@" -shellinaboxd.1: shellinabox/shellinaboxd.man.in config.h +shellinaboxd.1: ${top_srcdir}/shellinabox/shellinaboxd.man.in \ + ${top_srcdir}/config.h @src="${top_srcdir}/shellinabox/shellinaboxd.man.in"; \ echo preprocess "$$src" '>'"$@"; \ if sed -e 's/^#define \([^ ]*\).*/\1/' -e t -e d config.h | \ @@ -1267,6 +1285,14 @@ clean-local: $(OBJCOPY) --add-section .note.GNU-stack=GNU-stack "$@"; \ rm -f GNU-stack +.png.o: + @echo $(OBJCOPY) "$<" "$@" + @$(OBJCOPY) -I binary `$(objcopyflags)` `echo "$<" | $(renamesymbols)`\ + "$<" "$@" + @-printf '\000' >GNU-stack && \ + $(OBJCOPY) --add-section .note.GNU-stack=GNU-stack "$@"; \ + rm -f GNU-stack + .html.o: @echo $(OBJCOPY) "$<" "$@" @$(OBJCOPY) -I binary `$(objcopyflags)` `echo "$<" | $(renamesymbols)`\ @@ -1283,15 +1309,23 @@ clean-local: $(OBJCOPY) --add-section .note.GNU-stack=GNU-stack "$@"; \ rm -f GNU-stack -shellinabox/shell_in_a_box.o: shellinabox/shell_in_a_box.js config.h +shellinabox/shell_in_a_box.o: ${top_srcdir}/shellinabox/shell_in_a_box.js \ + ${top_srcdir}/config.h + +${top_srcdir}/shellinabox/vt100.js: ${top_srcdir}/shellinabox/vt100.jspp \ + ${top_srcdir}/shellinabox/keyboard-layout.html .jspp.js: @echo preprocess "$<" "$@" - @sed -e "`sed -e 's/^#define *\([^ ]*\) *\(.*\)/\/^[^#]\/s\/\1\/\2 \\\\\/* \1 *\\\\\/\/g/' \ + @kbd=`while read i; do \ + printf '%s' "\`echo "$$i" | sed 's/&/\\\\\\&/g'\`"; \ + done <${top_srcdir}/shellinabox/keyboard-layout.html`; \ + sed -e "`sed -e 's/^#define *\([^ ]*\) *\(.*\)/\/^[^#]\/s\/\1\/\2 \\\\\/* \1 *\\\\\/\/g/' \ -e t \ -e d "$<"`" \ -e "s/^#/\/\/ #/" \ -e "s/VERSION/\"@VERSION@ (revision @VCS_REVISION@)\"/g" \ + -e "s%KEYBOARD%'$${kbd}'%" \ "$<" >"$@" .js.o: diff --git a/config.h b/config.h index e9fc3ac..547512c 100644 --- a/config.h +++ b/config.h @@ -153,7 +153,7 @@ #define STDC_HEADERS 1 /* Most recent revision number in the version control system */ -#define VCS_REVISION "220" +#define VCS_REVISION "221" /* Version number of package */ #define VERSION "2.10" diff --git a/configure b/configure index 801ff0a..ffd537e 100755 --- a/configure +++ b/configure @@ -2328,7 +2328,7 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $ ac_compiler_gnu=$ac_cv_c_compiler_gnu -VCS_REVISION=220 +VCS_REVISION=221 cat >>confdefs.h <<_ACEOF diff --git a/configure.ac b/configure.ac index 53fa250..64d38bb 100644 --- a/configure.ac +++ b/configure.ac @@ -2,7 +2,7 @@ AC_PREREQ(2.57) dnl This is the one location where the authoritative version number is stored AC_INIT(shellinabox, 2.10, markus@shellinabox.com) -VCS_REVISION=220 +VCS_REVISION=221 AC_SUBST(VCS_REVISION) AC_DEFINE_UNQUOTED(VCS_REVISION, "${VCS_REVISION}", [Most recent revision number in the version control system]) diff --git a/demo/keyboard.png b/demo/keyboard.png new file mode 100644 index 0000000000000000000000000000000000000000..feef5195bacb91ea381f42667e24e169708853d4 GIT binary patch literal 808 zcmV+@1K0eCP)Px#24YJ`L;(K){{a7>y{D4^00PiSL_t(Y$IX^aYg0iKhM&2)Y5l0ENh4CUjf$9} zsMt-xy?@2MxN@rtQCx|CL{M7<1;K@G{AjJBxX?{4wzk^ZBu(y&i@qbr>ur>*IxuAJ zJ7>y4EpRmlZWh8Sa2ptx@PZsZp&5W>;3-fCPD|k$@B|o<(rDxnPz5H1Wx!(@ zcLmOMfg`|4$;<<%fQyO1yFdfj2UO%l3LMvW1sD@E$MjtVMuFYh8y0>D*ej2F%(Sy%jk(1(Xs+5Ti;8B6Pyz2nBKx%i|UcIa_RD>klk7^|b)(()TwBE{LH3 ztcw0cpr*97l%8d!yK8Fihh|s0){Udi1mAt_~$igTw%xZO9}*oy0#@|>T;$b7E7+8! z&=r#?LvsaP+yRa%V6WeI)+=R-A(888wEB* z`FgMD{?kFrnlrCT**pe`)^V= 0) { settings = document.cookie.substr(settings + key.length). replace(/([0-1]*).*/, "$1"); - if (settings.length == 3 + (typeof userCSSList == 'undefined' ? + if (settings.length == 5 + (typeof userCSSList == 'undefined' ? 0 : userCSSList.length)) { this.utfPreferred = settings.charAt(0) != '0'; this.visualBell = settings.charAt(1) != '0'; this.autoprint = settings.charAt(2) != '0'; - this.blinkingCursor = settings.charAt(3) != '0'; + this.softKeyboard = settings.charAt(3) != '0'; + this.blinkingCursor = settings.charAt(4) != '0'; if (typeof userCSSList != 'undefined') { for (var i = 0; i < userCSSList.length; ++i) { - userCSSList[i][2] = settings.charAt(i + 3) != '0'; + userCSSList[i][2] = settings.charAt(i + 5) != '0'; } } } @@ -332,6 +331,7 @@ VT100.prototype.storeUserSettings = function() { (this.utfEnabled ? '1' : '0') + (this.visualBell ? '1' : '0') + (this.autoprint ? '1' : '0') + + (this.softKeyboard ? '1' : '0') + (this.blinkingCursor ? '1' : '0'); if (typeof userCSSList != 'undefined') { for (var i = 0; i < userCSSList.length; ++i) { @@ -413,7 +413,7 @@ VT100.prototype.initializeUserCSSStyles = function() { label.textContent= label.textContent; } - // User style sheets are number sequentially + // User style sheets are numbered sequentially var sheet = document.getElementById( 'usercss-' + i); if (i == current) { @@ -470,6 +470,328 @@ VT100.prototype.initializeUserCSSStyles = function() { } }; +VT100.prototype.resetLastSelectedKey = function(e) { + var key = this.lastSelectedKey; + if (!key) { + return false; + } + + var position = this.mousePosition(e); + + // We don't get all the necessary events to reliably reselect a key + // if we moved away from it and then back onto it. We approximate the + // behavior by remembering the key until either we release the mouse + // button (we might never get this event if the mouse has since left + // the window), or until we move away too far. + var box = this.keyboard.firstChild; + if (position[0] < box.offsetLeft + key.offsetWidth || + position[1] < box.offsetTop + key.offsetHeight || + position[0] >= box.offsetLeft + box.offsetWidth - key.offsetWidth || + position[1] >= box.offsetTop + box.offsetHeight - key.offsetHeight || + position[0] < box.offsetLeft + key.offsetLeft - key.offsetWidth || + position[1] < box.offsetTop + key.offsetTop - key.offsetHeight || + position[0] >= box.offsetLeft + key.offsetLeft + 2*key.offsetWidth || + position[1] >= box.offsetTop + key.offsetTop + 2*key.offsetHeight) { + if (this.lastSelectedKey.className) log.console('reset: deselecting'); + this.lastSelectedKey.className = ''; + this.lastSelectedKey = undefined; + } + return false; +}; + +VT100.prototype.showShiftState = function(state) { + var style = document.getElementById('shift_state'); + if (state) { + this.setTextContentRaw(style, + '#vt100 #keyboard .shifted {' + + 'display: inline }' + + '#vt100 #keyboard .unshifted {' + + 'display: none }'); + } else { + this.setTextContentRaw(style, ''); + } + var elems = this.keyboard.getElementsByTagName('I'); + for (var i = 0; i < elems.length; ++i) { + if (elems[i].id == '16') { + elems[i].className = state ? 'selected' : ''; + } + } +}; + +VT100.prototype.showCtrlState = function(state) { + var ctrl = this.getChildById(this.keyboard, '17' /* Ctrl */); + if (ctrl) { + ctrl.className = state ? 'selected' : ''; + } +}; + +VT100.prototype.showAltState = function(state) { + var alt = this.getChildById(this.keyboard, '18' /* Alt */); + if (alt) { + alt.className = state ? 'selected' : ''; + } +}; + +VT100.prototype.clickedKeyboard = function(e, elem, ch, key, shift, ctrl, alt){ + var fake = [ ]; + fake.charCode = ch; + fake.keyCode = key; + fake.ctrlKey = ctrl; + fake.shiftKey = shift; + fake.altKey = alt; + fake.metaKey = alt; + return this.handleKey(fake); +}; + +VT100.prototype.addKeyBinding = function(elem, ch, key, CH, KEY) { + if (elem == undefined) { + return; + } + if (ch == '\u00A0') { + //   should be treated as a regular space character. + ch = ' '; + } + if (ch != undefined && CH == undefined) { + // For letter keys, we automatically compute the uppercase character code + // from the lowercase one. + CH = ch.toUpperCase(); + } + if (KEY == undefined && key != undefined) { + // Most keys have identically key codes for both lowercase and uppercase + // keypresses. Normally, only function keys would have distinct key codes, + // whereas regular keys have character codes. + KEY = key; + } else if (KEY == undefined && CH != undefined) { + // For regular keys, copy the character code to the key code. + KEY = CH.charCodeAt(0); + } + if (key == undefined && ch != undefined) { + // For regular keys, copy the character code to the key code. + key = ch.charCodeAt(0); + } + // Convert characters to numeric character codes. If the character code + // is undefined (i.e. this is a function key), set it to zero. + ch = ch ? ch.charCodeAt(0) : 0; + CH = CH ? CH.charCodeAt(0) : 0; + + // Mouse down events high light the key. We also set lastSelectedKey. This + // is needed to that mouseout/mouseover can keep track of the key that + // is currently being clicked. + this.addListener(elem, 'mousedown', + function(vt100, elem, key) { return function(e) { + if ((e.which || e.button) == 1) { + if (vt100.lastSelectedKey) { + vt100.lastSelectedKey.className= ''; + } + // Highlight the key while the mouse button is held down. + if (key == 16 /* Shift */) { + if (!elem.className != vt100.isShift) { + vt100.showShiftState(!vt100.isShift); + } + } else if (key == 17 /* Ctrl */) { + if (!elem.className != vt100.isCtrl) { + vt100.showCtrlState(!vt100.isCtrl); + } + } else if (key == 18 /* Alt */) { + if (!elem.className != vt100.isAlt) { + vt100.showAltState(!vt100.isAlt); + } + } else { + elem.className = 'selected'; + } + vt100.lastSelectedKey = elem; + } + return false; }; }(this, elem, key)); + var clicked = + // Modifier keys update the state of the keyboard, but do not generate + // any key clicks that get forwarded to the application. + key >= 16 /* Shift */ && key <= 18 /* Alt */ ? + function(vt100, elem) { return function(e) { + if (elem == vt100.lastSelectedKey) { + if (key == 16 /* Shift */) { + // The user clicked the Shift key + vt100.isShift = !vt100.isShift; + vt100.showShiftState(vt100.isShift); + } else if (key == 17 /* Ctrl */) { + vt100.isCtrl = !vt100.isCtrl; + vt100.showCtrlState(vt100.isCtrl); + } else if (key == 18 /* Alt */) { + vt100.isAlt = !vt100.isAlt; + vt100.showAltState(vt100.isAlt); + } + vt100.lastSelectedKey = undefined; + } + if (vt100.lastSelectedKey) { + vt100.lastSelectedKey.className = ''; + vt100.lastSelectedKey = undefined; + } + return false; }; }(this, elem) : + // Regular keys generate key clicks, when the mouse button is released or + // when a mouse click event is received. + function(vt100, elem, ch, key, CH, KEY) { return function(e) { + if (vt100.lastSelectedKey) { + if (elem == vt100.lastSelectedKey) { + // The user clicked a key. + if (vt100.isShift) { + vt100.clickedKeyboard(e, elem, CH, KEY, + true, vt100.isCtrl, vt100.isAlt); + } else { + vt100.clickedKeyboard(e, elem, ch, key, + false, vt100.isCtrl, vt100.isAlt); + } + vt100.isShift = false; + vt100.showShiftState(false); + vt100.isCtrl = false; + vt100.showCtrlState(false); + vt100.isAlt = false; + vt100.showAltState(false); + } + vt100.lastSelectedKey.className = ''; + vt100.lastSelectedKey = undefined; + } + elem.className = ''; + return false; }; }(this, elem, ch, key, CH, KEY); + this.addListener(elem, 'mouseup', clicked); + this.addListener(elem, 'click', clicked); + + // When moving the mouse away from a key, check if any keys need to be + // deselected. + this.addListener(elem, 'mouseout', + function(vt100, elem, key) { return function(e) { + if (key == 16 /* Shift */) { + if (!elem.className == vt100.isShift) { + vt100.showShiftState(vt100.isShift); + } + } else if (key == 17 /* Ctrl */) { + if (!elem.className == vt100.isCtrl) { + vt100.showCtrlState(vt100.isCtrl); + } + } else if (key == 18 /* Alt */) { + if (!elem.className == vt100.isAlt) { + vt100.showAltState(vt100.isAlt); + } + } else if (elem.className) { + elem.className = ''; + vt100.lastSelectedKey = elem; + } else if (vt100.lastSelectedKey) { + vt100.resetLastSelectedKey(e); + } + return false; }; }(this, elem, key)); + + // When moving the mouse over a key, select it if the user is still holding + // the mouse button down (i.e. elem == lastSelectedKey) + this.addListener(elem, 'mouseover', + function(vt100, elem, key) { return function(e) { + if (elem == vt100.lastSelectedKey) { + if (key == 16 /* Shift */) { + if (!elem.className != vt100.isShift) { + vt100.showShiftState(!vt100.isShift); + } + } else if (key == 17 /* Ctrl */) { + if (!elem.className != vt100.isCtrl) { + vt100.showCtrlState(!vt100.isCtrl); + } + } else if (key == 18 /* Alt */) { + if (!elem.className != vt100.isAlt) { + vt100.showAltState(!vt100.isAlt); + } + } else if (!elem.className) { + elem.className = 'selected'; + } + } else { + vt100.resetLastSelectedKey(e); + } + return false; }; }(this, elem, key)); +}; + +VT100.prototype.initializeKeyBindings = function(elem) { + if (elem) { + if (elem.nodeName == "I" || elem.nodeName == "B") { + if (elem.id) { + // Function keys. The Javascript keycode is part of the "id" + var i = parseInt(elem.id); + if (i) { + // If the id does not parse as a number, it is not a keycode. + this.addKeyBinding(elem, undefined, i); + } + } else { + var child = elem.firstChild; + if (child.nodeName == "#text") { + // If the key only has a text node as a child, then it is a letter. + // Automatically compute the lower and upper case version of the key. + this.addKeyBinding(elem, this.getTextContent(child).toLowerCase()); + } else { + // If the key has two children, they are the lower and upper case + // character code, respectively. + this.addKeyBinding(elem, this.getTextContent(child), undefined, + this.getTextContent(child.nextSibling)); + } + } + } + } + // Recursively parse all other child nodes. + for (elem = elem.firstChild; elem; elem = elem.nextSibling) { + this.initializeKeyBindings(elem); + } +}; + +VT100.prototype.initializeKeyboard = function() { + // Configure mouse event handlers for button that displays/hides keyboard + var box = this.keyboard.firstChild; + this.hideSoftKeyboard(); + this.addListener(this.keyboardImage, 'click', + function(vt100) { return function(e) { + if (vt100.keyboard.style.display != '') { + if (vt100.reconnectBtn.style.visibility != '') { + vt100.showSoftKeyboard(); + } + } else { + vt100.hideSoftKeyboard(); + vt100.input.focus(); + } + return false; }; }(this)); + + // Enable button that displays keyboard + if (this.softKeyboard) { + this.keyboardImage.style.visibility = 'visible'; + } + + // Configure mouse event handlers for on-screen keyboard + this.addListener(this.keyboard, 'click', + function(vt100) { return function(e) { + vt100.hideSoftKeyboard(); + vt100.input.focus(); + return false; }; }(this)); + this.addListener(this.keyboard, 'selectstart', this.cancelEvent); + this.addListener(box, 'click', this.cancelEvent); + this.addListener(box, 'mouseup', + function(vt100) { return function(e) { + if (vt100.lastSelectedKey) { + vt100.lastSelectedKey.className = ''; + vt100.lastSelectedKey = undefined; + } + return false; }; }(this)); + this.addListener(box, 'mouseout', + function(vt100) { return function(e) { + return vt100.resetLastSelectedKey(e); }; }(this)); + this.addListener(box, 'mouseover', + function(vt100) { return function(e) { + return vt100.resetLastSelectedKey(e); }; }(this)); + + // Configure SHIFT key behavior + var style = document.createElement('style'); + var id = document.createAttribute('id'); + id.nodeValue = 'shift_state'; + style.setAttributeNode(id); + var type = document.createAttribute('type'); + type.nodeValue = 'text/css'; + style.setAttributeNode(type); + document.getElementsByTagName('head')[0].appendChild(style); + + // Set up key bindings + this.initializeKeyBindings(box); +}; + VT100.prototype.initializeElements = function(container) { // If the necessary objects have not already been defined in the HTML // page, create them now. @@ -483,6 +805,9 @@ VT100.prototype.initializeElements = function(container) { if (!this.getChildById(this.container, 'reconnect') || !this.getChildById(this.container, 'menu') || + !this.getChildById(this.container, 'keyboard') || + !this.getChildById(this.container, 'kbd_button') || + !this.getChildById(this.container, 'kbd_img') || !this.getChildById(this.container, 'scrollable') || !this.getChildById(this.container, 'console') || !this.getChildById(this.container, 'alt_console') || @@ -525,7 +850,15 @@ VT100.prototype.initializeElements = function(container) { '' + '' + + '
' + + '
EscF1F2F3F4F5F6F7F8F9F10F11F12
`~1!2@3#4$5%6^7&8*9(0)-_=+ ← 
TabQWERTYUIOP[{]}\|
Tab  ASDFGHJKL;:'"Enter
  ShiftZXCVBNM,<.>/?Shift
XXXCtrlAlt 
   
InsDelHomeEnd
 
 
Ins ↑  ⇑
Ins←↓→ ⇓
' + + '
' + '
' + + '' + + '' + + '' + + '' + + '
     
' + '
 
' + '
' +
                            '
' +
@@ -566,6 +899,8 @@ VT100.prototype.initializeElements = function(container) {
   this.reconnectBtn            = this.getChildById(this.container,'reconnect');
   this.curSizeBox              = this.getChildById(this.container, 'cursize');
   this.menu                    = this.getChildById(this.container, 'menu');
+  this.keyboard                = this.getChildById(this.container, 'keyboard');
+  this.keyboardImage           = this.getChildById(this.container, 'kbd_img');
   this.scrollable              = this.getChildById(this.container,
                                                                  'scrollable');
   this.lineheight              = this.getChildById(this.container,
@@ -646,6 +981,9 @@ VT100.prototype.initializeElements = function(container) {
   // Hide context menu
   this.hideContextMenu();
 
+  // Set up onscreen soft keyboard
+  this.initializeKeyboard();
+
   // Add listener to reconnect button
   this.addListener(this.reconnectBtn.firstChild, 'click',
                    function(vt100) {
@@ -733,6 +1071,7 @@ VT100.prototype.reconnect = function() {
 
 VT100.prototype.showReconnect = function(state) {
   if (state) {
+    this.hideSoftKeyboard();
     this.reconnectBtn.style.visibility = '';
   } else {
     this.reconnectBtn.style.visibility = 'hidden';
@@ -766,6 +1105,9 @@ VT100.prototype.resized = function(w, h) {
 };
 
 VT100.prototype.resizer = function() {
+  // Hide onscreen soft keyboard
+  this.hideSoftKeyboard();
+
   // The cursor can get corrupted if the print-preview is displayed in Firefox.
   // Recreating it, will repair it.
   var newCursor                = document.createElement('pre');
@@ -945,6 +1287,17 @@ VT100.prototype.cancelEvent = function(event) {
   return false;
 };
 
+VT100.prototype.mousePosition = function(event) {
+  var offsetX      = this.container.offsetLeft;
+  var offsetY      = this.container.offsetTop;
+  for (var e = this.container; e = e.offsetParent; ) {
+    offsetX       += e.offsetLeft;
+    offsetY       += e.offsetTop;
+  }
+  return [ event.clientX - offsetX,
+           event.clientY - offsetY ];
+};
+
 VT100.prototype.mouseEvent = function(event, type) {
   // If any text is currently selected, do not move the focus as that would
   // invalidate the selection.
@@ -954,15 +1307,10 @@ VT100.prototype.mouseEvent = function(event, type) {
   }
 
   // Compute mouse position in characters.
-  var offsetX      = this.container.offsetLeft;
-  var offsetY      = this.container.offsetTop;
-  for (var e = this.container; e = e.offsetParent; ) {
-    offsetX       += e.offsetLeft;
-    offsetY       += e.offsetTop;
-  }
-  var x            = (event.clientX - offsetX) / this.cursorWidth;
-  var y            = ((event.clientY - offsetY) + this.scrollable.offsetTop) /
-                     this.cursorHeight - this.numScrollbackLines;
+  var position     = this.mousePosition(event);
+  var x            = Math.floor(position[0] / this.cursorWidth);
+  var y            = Math.floor((position[1] + this.scrollable.scrollTop) /
+                                this.cursorHeight) - this.numScrollbackLines;
   var inside       = true;
   if (x >= this.terminalWidth) {
     x              = this.terminalWidth - 1;
@@ -1022,7 +1370,7 @@ VT100.prototype.mouseEvent = function(event, type) {
   // Bring up context menu.
   if (button == 2 && !event.shiftKey) {
     if (type == 0 /* MOUSE_DOWN */) {
-      this.showContextMenu(event.clientX - offsetX, event.clientY - offsetY);
+      this.showContextMenu(position[0], position[1]);
     }
     return this.cancelEvent(event);
   }
@@ -1058,6 +1406,29 @@ VT100.prototype.getTextContent = function(elem) {
          (typeof elem.textContent == 'undefined' ? elem.innerText : '');
 };
 
+VT100.prototype.setTextContentRaw = function(elem, s) {
+  // Updating the content of an element is an expensive operation. It actually
+  // pays off to first check whether the element is still unchanged.
+  if (typeof elem.textContent == 'undefined') {
+    if (elem.innerText != s) {
+      try {
+        elem.innerText = s;
+      } catch (e) {
+        // Very old versions of IE do not allow setting innerText. Instead,
+        // remove all children, by setting innerHTML and then set the text
+        // using DOM methods.
+        elem.innerHTML = '';
+        elem.appendChild(document.createTextNode(
+                                          this.replaceChar(s, ' ', '\u00A0')));
+      }
+    }
+  } else {
+    if (elem.textContent != s) {
+      elem.textContent = s;
+    }
+  }
+};
+
 VT100.prototype.setTextContent = function(elem, s) {
   // Check if we find any URLs in the text. If so, automatically convert them
   // to links.
@@ -1103,26 +1474,7 @@ VT100.prototype.setTextContent = function(elem, s) {
     return;
   }
 
-  // Updating the content of an element is an expensive operation. It actually
-  // pays off to first check whether the element is still unchanged.
-  if (typeof elem.textContent == 'undefined') {
-    if (elem.innerText != s) {
-      try {
-        elem.innerText = s;
-      } catch (e) {
-        // Very old versions of IE do not allow setting innerText. Instead,
-        // remove all children, by setting innerHTML and then set the text
-        // using DOM methods.
-        elem.innerHTML = '';
-        elem.appendChild(document.createTextNode(
-                                          this.replaceChar(s, ' ', '\u00A0')));
-      }
-    }
-  } else {
-    if (elem.textContent != s) {
-      elem.textContent = s;
-    }
-  }
+  this.setTextContentRaw(elem, s);
 };
 
 VT100.prototype.insertBlankLine = function(y, color, style) {
@@ -1578,27 +1930,21 @@ VT100.prototype.enableAlternateScreen = function(state) {
   this.console[this.currentScreen].style.display     = '';
 
   // Select appropriate character pitch.
-  var styles                                         = [ 'transform',
-                                                         'WebkitTransform',
-                                                         'MozTransform',
-                                                         'filter' ];
-  for (var i = 0; i < styles.length; ++i) {
-    if (typeof this.console[0].style[styles[i]] != 'undefined') {
-      if (state) {
-        // Upon enabling the alternate screen, we switch to 80 column mode. But
-        // upon returning to the regular screen, we restore the mode that was
-        // in effect previously.
-        this.console[1].style[styles[i]]             = '';
-      }
-      var style                                      =
-                             this.console[this.currentScreen].style[styles[i]];
-      this.cursor.style[styles[i]]                   = style;
-      this.space.style[styles[i]]                    = style;
-      this.scale                                     = style == '' ? 1.0:1.65;
-      if (styles[i] == 'filter') {
-        this.console[this.currentScreen].style.width = style == '' ? '165%':'';
-      }
-      break;
+  var transform                                      = this.getTransformName();
+  if (transform) {
+    if (state) {
+      // Upon enabling the alternate screen, we switch to 80 column mode. But
+      // upon returning to the regular screen, we restore the mode that was
+      // in effect previously.
+      this.console[1].style[transform]               = '';
+    }
+    var style                                        =
+                             this.console[this.currentScreen].style[transform];
+    this.cursor.style[transform]                     = style;
+    this.space.style[transform]                      = style;
+    this.scale                                       = style == '' ? 1.0:1.65;
+    if (transform == 'filter') {
+       this.console[this.currentScreen].style.width  = style == '' ? '165%':'';
     }
   }
   this.resizer();
@@ -1969,12 +2315,76 @@ VT100.prototype.toggleBell = function() {
   this.visualBell = !this.visualBell;
 };
 
+VT100.prototype.toggleSoftKeyboard = function() {
+  this.softKeyboard = !this.softKeyboard;
+  this.keyboardImage.style.visibility = this.softKeyboard ? 'visible' : '';
+};
+
+VT100.prototype.deselectKeys = function(elem) {
+  if (elem && elem.className == 'selected') {
+    elem.className = '';
+  }
+  for (elem = elem.firstChild; elem; elem = elem.nextSibling) {
+    this.deselectKeys(elem);
+  }
+};
+
+VT100.prototype.showSoftKeyboard = function() {
+  // Make sure no key is currently selected
+  this.lastSelectedKey           = undefined;
+  this.deselectKeys(this.keyboard);
+  this.isShift                   = false;
+  this.showShiftState(false);
+  this.isCtrl                    = false;
+  this.showCtrlState(false);
+  this.isAlt                     = false;
+  this.showAltState(false);
+
+  this.keyboard.style.left       = '0px';
+  this.keyboard.style.top        = '0px';
+  this.keyboard.style.width      = this.container.offsetWidth  + 'px';
+  this.keyboard.style.height     = this.container.offsetHeight + 'px';
+  this.keyboard.style.visibility = 'hidden';
+  this.keyboard.style.display    = '';
+
+  var kbd                        = this.keyboard.firstChild;
+  var scale                      = 1.0;
+  var transform                  = this.getTransformName();
+  if (transform) {
+    kbd.style[transform]         = '';
+    if (kbd.offsetWidth > 0.9 * this.container.offsetWidth) {
+      scale                      = (kbd.offsetWidth/
+                                    this.container.offsetWidth)/0.9;
+    }
+    if (kbd.offsetHeight > 0.9 * this.container.offsetHeight) {
+      scale                      = Math.max((kbd.offsetHeight/
+                                             this.container.offsetHeight)/0.9);
+    }
+    var style                    = this.getTransformStyle(transform,
+                                              scale > 1.0 ? scale : undefined);
+    kbd.style[transform]         = style;
+  }
+  if (transform == 'filter') {
+    scale                        = 1.0;
+  }
+  kbd.style.left                 = ((this.container.offsetWidth -
+                                     kbd.offsetWidth/scale)/2) + 'px';
+  kbd.style.top                  = ((this.container.offsetHeight -
+                                     kbd.offsetHeight/scale)/2) + 'px';
+
+  this.keyboard.style.visibility = 'visible';
+};
+
+VT100.prototype.hideSoftKeyboard = function() {
+  this.keyboard.style.display    = 'none';
+};
+
 VT100.prototype.toggleCursorBlinking = function() {
   this.blinkingCursor = !this.blinkingCursor;
 };
 
 VT100.prototype.about = function() {
-  alert("VT100 Terminal Emulator " + "2.10 (revision 220)" +
+  alert("VT100 Terminal Emulator " + "2.10 (revision 221)" +
         "\nCopyright 2008-2010 by Markus Gutschke\n" +
         "For more information check http://shellinabox.com");
 };
@@ -2007,6 +2417,9 @@ VT100.prototype.showContextMenu = function(x, y) {
           '
  • ' +
              (this.visualBell ? '' : '') +
              'Visual Bell
    • '+
+          '
  • ' +
+             (this.softKeyboard ? '' : '') +
+             'Onscreen Keyboard
    • ' +
           '
  • ' +
              (this.blinkingCursor ? '' : '') +
              'Blinking Cursor
    • '+
@@ -2038,6 +2451,7 @@ VT100.prototype.showContextMenu = function(x, y) {
   // Actions for default items
   var actions                 = [ this.copyLast, p, this.reset,
                                   this.toggleUTF, this.toggleBell,
+                                  this.toggleSoftKeyboard,
                                   this.toggleCursorBlinking ];
 
   // Actions for user CSS styles (if any)
@@ -2093,26 +2507,30 @@ VT100.prototype.showContextMenu = function(x, y) {
   }
 
   // Position menu next to the mouse pointer
-  if (x + popup.clientWidth > this.container.offsetWidth) {
-    x                         = this.container.offsetWidth - popup.clientWidth;
+  this.menu.style.left        = '0px';
+  this.menu.style.top         = '0px';
+  this.menu.style.width       =  this.container.offsetWidth  + 'px';
+  this.menu.style.height      =  this.container.offsetHeight + 'px';
+  popup.style.left            = '0px';
+  popup.style.top             = '0px';
+  
+  var margin                  = 2;
+  if (x + popup.clientWidth >= this.container.offsetWidth - margin) {
+    x              = this.container.offsetWidth-popup.clientWidth - margin - 1;
   }
-  if (x < 0) {
-    x                         = 0;
+  if (x < margin) {
+    x                         = margin;
   }
-  if (y + popup.clientHeight > this.container.offsetHeight) {
-    y                         = this.container.offsetHeight-popup.clientHeight;
+  if (y + popup.clientHeight >= this.container.offsetHeight - margin) {
+    y            = this.container.offsetHeight-popup.clientHeight - margin - 1;
   }
-  if (y < 0) {
-    y                         = 0;
+  if (y < margin) {
+    y                         = margin;
   }
   popup.style.left            = x + 'px';
   popup.style.top             = y + 'px';
 
   // Block all other interactions with the terminal emulator
-  this.menu.style.left        = '0px';
-  this.menu.style.top         = '0px';
-  this.menu.style.width       =  this.container.offsetWidth  + 'px';
-  this.menu.style.height      =  this.container.offsetHeight + 'px';
   this.addListener(this.menu, 'click', function(vt100) {
                                          return function() {
                                            vt100.hideContextMenu();
@@ -2895,39 +3313,42 @@ VT100.prototype.restoreCursor = function() {
               this.savedY[this.currentScreen]);
 };
 
-VT100.prototype.set80_132Mode = function(state) {
-  var transform                                       = undefined;
-  var styles                                          = [ 'transform',
-                                                          'WebkitTransform',
-                                                          'MozTransform',
-                                                          'filter'
-                                                        ];
+VT100.prototype.getTransformName = function() {
+  var styles = [ 'transform', 'WebkitTransform', 'MozTransform', 'filter' ];
   for (var i = 0; i < styles.length; ++i) {
     if (typeof this.console[0].style[styles[i]] != 'undefined') {
-      transform                                       = styles[i];
-      break;
+      return styles[i];
     }
   }
+  return undefined;
+};
 
+VT100.prototype.getTransformStyle = function(transform, scale) {
+  return scale && scale != 1.0
+    ? transform == 'filter'
+      ? 'progid:DXImageTransform.Microsoft.Matrix(' +
+                                 'M11=' + (1.0/scale) + ',M12=0,M21=0,M22=1,' +
+                                 "sizingMethod='auto expand')"
+      : 'translateX(-50%) ' +
+        'scaleX(' + (1.0/scale) + ') ' +
+        'translateX(50%)'
+    : '';
+};
+
+VT100.prototype.set80_132Mode = function(state) {
+  var transform                  = this.getTransformName();
   if (transform) {
     if ((this.console[this.currentScreen].style[transform] != '') == state) {
       return;
     }
-    var style                                         =
-      state ? transform == 'filter'
-            ? 'progid:DXImageTransform.Microsoft.Matrix(' +
-                             'M11=0.606060606060606060606,M12=0,M21=0,M22=1,' +
-                             "sizingMethod='auto expand')"
-            : 'translateX(-50%) ' +
-              'scaleX(0.606060606060606060606) ' +
-              'translateX(50%)'
-            : '';
+    var style                    = state ?
+                                   this.getTransformStyle(transform, 1.65):'';
     this.console[this.currentScreen].style[transform] = style;
-    this.cursor.style[transform]                      = style;
-    this.space.style[transform]                       = style;
-    this.scale                                        = state ? 1.65 : 1.0;
+    this.cursor.style[transform] = style;
+    this.space.style[transform]  = style;
+    this.scale                   = state ? 1.65 : 1.0;
     if (transform == 'filter') {
-      this.console[this.currentScreen].style.width    = state ? '165%' : '';
+      this.console[this.currentScreen].style.width = state ? '165%' : '';
     }
     this.resizer();
   }
diff --git a/shellinabox/keyboard-layout.html b/shellinabox/keyboard-layout.html
new file mode 100644
index 0000000..b1932f9
--- /dev/null
+++ b/shellinabox/keyboard-layout.html
@@ -0,0 +1,59 @@
+
    +  
    
+    EscF1F2F3
+     F4F5F6F7
+     F8F9F10F11
+     F12
    
+    `~
+      1!
+      2@
+      3#
+      4$
+      5%
+      6^
+      7&
+      8*
+      9(
+      0)
+      -_
+      =+
+       ← 
+      
    
+    Tab
+      QWERTYUIO
+      P
+      [{
+      ]}
+      \|
+      
    
+    Tab  
+      ASDFGHJKL
+      ;:
+      '"
+      Enter
+      
    
+      
+      Shift
+      ZXCVBNM
+      ,<
+      .>
+      /?
+      Shift
+      
    
+    XXX
+      Ctrl
+      Alt
+       
+  
    
+     
+  
    
+    InsDelHomeEnd
+    
    
+     
    
+     
    
+    Ins ↑  
+      ⇑
    
+    Ins←↓
+      → ⇓
+  
    
+
    
diff --git a/shellinabox/keyboard.png b/shellinabox/keyboard.png
new file mode 100644
index 0000000000000000000000000000000000000000..feef5195bacb91ea381f42667e24e169708853d4
GIT binary patch
literal 808
zcmV+@1K0eCP)Px#24YJ`L;(K){{a7>y{D4^00PiSL_t(Y$IX^aYg0iKhM&2)Y5l0ENh4CUjf$9}
zsMt-xy?@2MxN@rtQCx|CL{M7<1;K@G{AjJBxX?{4wzk^ZBu(y&i@qbr>ur>*IxuAJ
zJ7>y4EpRmlZWh8Sa2ptx@PZsZp&5W>;3-fCPD|k$@B|o<(rDxnPz5H1Wx!(@
zcLmOMfg`|4$;<<%fQyO1yFdfj2UO%l3LMvW1sD@E$MjtVMuFYh8y0>D*ej2F%(Sy%jk(1(Xs+5Ti;8B6Pyz2nBKx%i|UcIa_RD>klk7^|b)(()TwBE{LH3
ztcw0cpr*97l%8d!yK8Fihh|s0){Udi1mAt_~$igTw%xZO9}*oy0#@|>T;$b7E7+8!
z&=r#?LvsaP+yRa%V6WeI)+=R-A(888wEB*
z`FgMD{?kFrnlrCT**pe`)^V= 0) {
     settings                = document.cookie.substr(settings + key.length).
                                                    replace(/([0-1]*).*/, "$1");
-    if (settings.length == 3 + (typeof userCSSList == 'undefined' ?
+    if (settings.length == 5 + (typeof userCSSList == 'undefined' ?
                                 0 : userCSSList.length)) {
       this.utfPreferred     = settings.charAt(0) != '0';
       this.visualBell       = settings.charAt(1) != '0';
       this.autoprint        = settings.charAt(2) != '0';
-      this.blinkingCursor   = settings.charAt(3) != '0';
+      this.softKeyboard     = settings.charAt(3) != '0';
+      this.blinkingCursor   = settings.charAt(4) != '0';
       if (typeof userCSSList != 'undefined') {
         for (var i = 0; i < userCSSList.length; ++i) {
-          userCSSList[i][2] = settings.charAt(i + 3) != '0';
+          userCSSList[i][2] = settings.charAt(i + 5) != '0';
         }
       }
     }
@@ -332,6 +331,7 @@ VT100.prototype.storeUserSettings = function() {
                   (this.utfEnabled     ? '1' : '0') +
                   (this.visualBell     ? '1' : '0') +
                   (this.autoprint      ? '1' : '0') +
+                  (this.softKeyboard   ? '1' : '0') +
                   (this.blinkingCursor ? '1' : '0');
   if (typeof userCSSList != 'undefined') {
     for (var i = 0; i < userCSSList.length; ++i) {
@@ -413,7 +413,7 @@ VT100.prototype.initializeUserCSSStyles = function() {
                         label.textContent= label.textContent;
                       }
 
-                      // User style sheets are number sequentially
+                      // User style sheets are numbered sequentially
                       var sheet          = document.getElementById(
                                                                'usercss-' + i);
                       if (i == current) {
@@ -470,6 +470,328 @@ VT100.prototype.initializeUserCSSStyles = function() {
   }
 };
 
+VT100.prototype.resetLastSelectedKey = function(e) {
+  var key                          = this.lastSelectedKey;
+  if (!key) {
+    return false;
+  }
+
+  var position                     = this.mousePosition(e);
+
+  // We don't get all the necessary events to reliably reselect a key
+  // if we moved away from it and then back onto it. We approximate the
+  // behavior by remembering the key until either we release the mouse
+  // button (we might never get this event if the mouse has since left
+  // the window), or until we move away too far.
+  var box                          = this.keyboard.firstChild;
+  if (position[0] <  box.offsetLeft + key.offsetWidth ||
+      position[1] <  box.offsetTop + key.offsetHeight ||
+      position[0] >= box.offsetLeft + box.offsetWidth - key.offsetWidth ||
+      position[1] >= box.offsetTop + box.offsetHeight - key.offsetHeight ||
+      position[0] <  box.offsetLeft + key.offsetLeft - key.offsetWidth ||
+      position[1] <  box.offsetTop + key.offsetTop - key.offsetHeight ||
+      position[0] >= box.offsetLeft + key.offsetLeft + 2*key.offsetWidth ||
+      position[1] >= box.offsetTop + key.offsetTop + 2*key.offsetHeight) {
+    if (this.lastSelectedKey.className) log.console('reset: deselecting');
+    this.lastSelectedKey.className = '';
+    this.lastSelectedKey           = undefined;
+  }
+  return false;
+};
+
+VT100.prototype.showShiftState = function(state) {
+  var style              = document.getElementById('shift_state');
+  if (state) {
+    this.setTextContentRaw(style,
+                           '#vt100 #keyboard .shifted {' +
+                             'display: inline }' +
+                           '#vt100 #keyboard .unshifted {' +
+                             'display: none }');
+  } else {
+    this.setTextContentRaw(style, '');
+  }
+  var elems              = this.keyboard.getElementsByTagName('I');
+  for (var i = 0; i < elems.length; ++i) {
+    if (elems[i].id == '16') {
+      elems[i].className = state ? 'selected' : '';
+    }
+  }
+};
+
+VT100.prototype.showCtrlState = function(state) {
+  var ctrl         = this.getChildById(this.keyboard, '17' /* Ctrl */);
+  if (ctrl) {
+    ctrl.className = state ? 'selected' : '';
+  }
+};
+
+VT100.prototype.showAltState = function(state) {
+  var alt         = this.getChildById(this.keyboard, '18' /* Alt */);
+  if (alt) {
+    alt.className = state ? 'selected' : '';
+  }
+};
+
+VT100.prototype.clickedKeyboard = function(e, elem, ch, key, shift, ctrl, alt){
+  var fake      = [ ];
+  fake.charCode = ch;
+  fake.keyCode  = key;
+  fake.ctrlKey  = ctrl;
+  fake.shiftKey = shift;
+  fake.altKey   = alt;
+  fake.metaKey  = alt;
+  return this.handleKey(fake);
+};
+
+VT100.prototype.addKeyBinding = function(elem, ch, key, CH, KEY) {
+  if (elem == undefined) {
+    return;
+  }
+  if (ch == '\u00A0') {
+    //   should be treated as a regular space character.
+    ch                                  = ' ';
+  }
+  if (ch != undefined && CH == undefined) {
+    // For letter keys, we automatically compute the uppercase character code
+    // from the lowercase one.
+    CH                                  = ch.toUpperCase();
+  }
+  if (KEY == undefined && key != undefined) {
+    // Most keys have identically key codes for both lowercase and uppercase
+    // keypresses. Normally, only function keys would have distinct key codes,
+    // whereas regular keys have character codes.
+    KEY                                 = key;
+  } else if (KEY == undefined && CH != undefined) {
+    // For regular keys, copy the character code to the key code.
+    KEY                                 = CH.charCodeAt(0);
+  }
+  if (key == undefined && ch != undefined) {
+    // For regular keys, copy the character code to the key code.
+    key                                 = ch.charCodeAt(0);
+  }
+  // Convert characters to numeric character codes. If the character code
+  // is undefined (i.e. this is a function key), set it to zero.
+  ch                                    = ch ? ch.charCodeAt(0) : 0;
+  CH                                    = CH ? CH.charCodeAt(0) : 0;
+
+  // Mouse down events high light the key. We also set lastSelectedKey. This
+  // is needed to that mouseout/mouseover can keep track of the key that
+  // is currently being clicked.
+  this.addListener(elem, 'mousedown',
+    function(vt100, elem, key) { return function(e) {
+      if ((e.which || e.button) == 1) {
+        if (vt100.lastSelectedKey) {       
+          vt100.lastSelectedKey.className= '';
+        }
+        // Highlight the key while the mouse button is held down.
+        if (key == 16 /* Shift */) {
+          if (!elem.className != vt100.isShift) {
+            vt100.showShiftState(!vt100.isShift);
+          }
+        } else if (key == 17 /* Ctrl */) {
+          if (!elem.className != vt100.isCtrl) {
+            vt100.showCtrlState(!vt100.isCtrl);
+          }
+        } else if (key == 18 /* Alt */) {
+          if (!elem.className != vt100.isAlt) {
+            vt100.showAltState(!vt100.isAlt);
+          }
+        } else {
+          elem.className                  = 'selected';
+        }
+        vt100.lastSelectedKey             = elem;
+      }
+      return false; }; }(this, elem, key));
+  var clicked                           =
+    // Modifier keys update the state of the keyboard, but do not generate
+    // any key clicks that get forwarded to the application.
+    key >= 16 /* Shift */ && key <= 18 /* Alt */ ?
+    function(vt100, elem) { return function(e) {
+      if (elem == vt100.lastSelectedKey) {
+        if (key == 16 /* Shift */) {
+          // The user clicked the Shift key
+          vt100.isShift                 = !vt100.isShift;
+          vt100.showShiftState(vt100.isShift);
+        } else if (key == 17 /* Ctrl */) {
+          vt100.isCtrl                  = !vt100.isCtrl;
+          vt100.showCtrlState(vt100.isCtrl);
+        } else if (key == 18 /* Alt */) {
+          vt100.isAlt                   = !vt100.isAlt;
+          vt100.showAltState(vt100.isAlt);
+        }
+        vt100.lastSelectedKey           = undefined;
+      }
+      if (vt100.lastSelectedKey) {
+        vt100.lastSelectedKey.className = '';
+        vt100.lastSelectedKey           = undefined;
+      }
+      return false; }; }(this, elem) :
+    // Regular keys generate key clicks, when the mouse button is released or
+    // when a mouse click event is received.
+    function(vt100, elem, ch, key, CH, KEY) { return function(e) {
+      if (vt100.lastSelectedKey) {
+        if (elem == vt100.lastSelectedKey) {
+          // The user clicked a key.
+          if (vt100.isShift) {
+            vt100.clickedKeyboard(e, elem, CH, KEY,
+                                  true, vt100.isCtrl, vt100.isAlt);
+          } else {
+            vt100.clickedKeyboard(e, elem, ch, key,
+                                  false, vt100.isCtrl, vt100.isAlt);
+          }
+          vt100.isShift                 = false;
+          vt100.showShiftState(false);
+          vt100.isCtrl                  = false;
+          vt100.showCtrlState(false);
+          vt100.isAlt                   = false;
+          vt100.showAltState(false);
+        }
+        vt100.lastSelectedKey.className = '';
+        vt100.lastSelectedKey           = undefined;
+      }
+      elem.className                    = '';
+      return false; }; }(this, elem, ch, key, CH, KEY);
+  this.addListener(elem, 'mouseup', clicked);
+  this.addListener(elem, 'click', clicked);
+
+  // When moving the mouse away from a key, check if any keys need to be
+  // deselected.
+  this.addListener(elem, 'mouseout',
+    function(vt100, elem, key) { return function(e) {
+      if (key == 16 /* Shift */) {
+        if (!elem.className == vt100.isShift) {
+          vt100.showShiftState(vt100.isShift);
+        }
+      } else if (key == 17 /* Ctrl */) {
+        if (!elem.className == vt100.isCtrl) {
+          vt100.showCtrlState(vt100.isCtrl);
+        }
+      } else if (key == 18 /* Alt */) {
+        if (!elem.className == vt100.isAlt) {
+          vt100.showAltState(vt100.isAlt);
+        }
+      } else if (elem.className) {
+        elem.className                  = '';
+        vt100.lastSelectedKey           = elem;
+      } else if (vt100.lastSelectedKey) {
+        vt100.resetLastSelectedKey(e);
+      }
+      return false; }; }(this, elem, key));
+
+  // When moving the mouse over a key, select it if the user is still holding
+  // the mouse button down (i.e. elem == lastSelectedKey)
+  this.addListener(elem, 'mouseover',
+    function(vt100, elem, key) { return function(e) {
+      if (elem == vt100.lastSelectedKey) {
+        if (key == 16 /* Shift */) {
+          if (!elem.className != vt100.isShift) {
+            vt100.showShiftState(!vt100.isShift);
+          }
+        } else if (key == 17 /* Ctrl */) {
+          if (!elem.className != vt100.isCtrl) {
+            vt100.showCtrlState(!vt100.isCtrl);
+          }
+        } else if (key == 18 /* Alt */) {
+          if (!elem.className != vt100.isAlt) {
+            vt100.showAltState(!vt100.isAlt);
+          }
+        } else if (!elem.className) {
+          elem.className                = 'selected';
+        }
+      } else {
+        vt100.resetLastSelectedKey(e);
+      }
+      return false; }; }(this, elem, key));
+};
+
+VT100.prototype.initializeKeyBindings = function(elem) {
+  if (elem) {
+    if (elem.nodeName == "I" || elem.nodeName == "B") {
+      if (elem.id) {
+        // Function keys. The Javascript keycode is part of the "id"
+        var i     = parseInt(elem.id);
+        if (i) {
+          // If the id does not parse as a number, it is not a keycode.
+          this.addKeyBinding(elem, undefined, i);
+        }
+      } else {
+        var child = elem.firstChild;
+        if (child.nodeName == "#text") {
+          // If the key only has a text node as a child, then it is a letter.
+          // Automatically compute the lower and upper case version of the key.
+          this.addKeyBinding(elem, this.getTextContent(child).toLowerCase());
+        } else {
+          // If the key has two children, they are the lower and upper case
+          // character code, respectively.
+          this.addKeyBinding(elem, this.getTextContent(child), undefined,
+                             this.getTextContent(child.nextSibling));
+        }
+      }
+    }
+  }
+  // Recursively parse all other child nodes.
+  for (elem = elem.firstChild; elem; elem = elem.nextSibling) {
+    this.initializeKeyBindings(elem);
+  }
+};
+
+VT100.prototype.initializeKeyboard = function() {
+  // Configure mouse event handlers for button that displays/hides keyboard
+  var box                               = this.keyboard.firstChild;
+  this.hideSoftKeyboard();
+  this.addListener(this.keyboardImage, 'click',
+    function(vt100) { return function(e) {
+      if (vt100.keyboard.style.display != '') {
+        if (vt100.reconnectBtn.style.visibility != '') {
+          vt100.showSoftKeyboard();
+        }
+      } else {
+        vt100.hideSoftKeyboard();
+        vt100.input.focus();
+      }
+      return false; }; }(this));
+
+  // Enable button that displays keyboard
+  if (this.softKeyboard) {
+    this.keyboardImage.style.visibility = 'visible';
+  }
+
+  // Configure mouse event handlers for on-screen keyboard
+  this.addListener(this.keyboard, 'click',
+    function(vt100) { return function(e) {
+      vt100.hideSoftKeyboard();
+      vt100.input.focus();
+      return false; }; }(this));
+  this.addListener(this.keyboard, 'selectstart', this.cancelEvent);
+  this.addListener(box, 'click', this.cancelEvent);
+  this.addListener(box, 'mouseup',
+    function(vt100) { return function(e) {
+      if (vt100.lastSelectedKey) {
+        vt100.lastSelectedKey.className = '';
+        vt100.lastSelectedKey           = undefined;
+      }
+      return false; }; }(this));
+  this.addListener(box, 'mouseout',
+    function(vt100) { return function(e) {
+      return vt100.resetLastSelectedKey(e); }; }(this));
+  this.addListener(box, 'mouseover',
+    function(vt100) { return function(e) {
+      return vt100.resetLastSelectedKey(e); }; }(this));
+
+  // Configure SHIFT key behavior
+  var style                             = document.createElement('style');
+  var id                                = document.createAttribute('id');
+  id.nodeValue                          = 'shift_state';
+  style.setAttributeNode(id);
+  var type                              = document.createAttribute('type');
+  type.nodeValue                        = 'text/css';
+  style.setAttributeNode(type);
+  document.getElementsByTagName('head')[0].appendChild(style);
+
+  // Set up key bindings
+  this.initializeKeyBindings(box);
+};
+
 VT100.prototype.initializeElements = function(container) {
   // If the necessary objects have not already been defined in the HTML
   // page, create them now.
@@ -483,6 +805,9 @@ VT100.prototype.initializeElements = function(container) {
 
   if (!this.getChildById(this.container, 'reconnect')   ||
       !this.getChildById(this.container, 'menu')        ||
+      !this.getChildById(this.container, 'keyboard')    ||
+      !this.getChildById(this.container, 'kbd_button')  ||
+      !this.getChildById(this.container, 'kbd_img')     ||
       !this.getChildById(this.container, 'scrollable')  ||
       !this.getChildById(this.container, 'console')     ||
       !this.getChildById(this.container, 'alt_console') ||
@@ -525,7 +850,15 @@ VT100.prototype.initializeElements = function(container) {
                        '' +
                        '' +
+                       '
    ' +
+                         '
    EscF1F2F3F4F5F6F7F8F9F10F11F12
    `~1!2@3#4$5%6^7&8*9(0)-_=+ ← 
    TabQWERTYUIOP[{]}\|
    Tab  ASDFGHJKL;:'"Enter
      ShiftZXCVBNM,<.>/?Shift
    XXXCtrlAlt 
       
    InsDelHomeEnd
     
     
    Ins ↑  ⇑
    Ins←↓→ ⇓
    ' +
+                       '
    ' +
                        '
    ' +
+                         '' +
+                           '' +
+                           '' +
+                           '' +
+                         '
         
    ' +
                          '
     
    ' +
                          '
    ' +
                            '
    ' +
@@ -566,6 +899,8 @@ VT100.prototype.initializeElements = function(container) {
   this.reconnectBtn            = this.getChildById(this.container,'reconnect');
   this.curSizeBox              = this.getChildById(this.container, 'cursize');
   this.menu                    = this.getChildById(this.container, 'menu');
+  this.keyboard                = this.getChildById(this.container, 'keyboard');
+  this.keyboardImage           = this.getChildById(this.container, 'kbd_img');
   this.scrollable              = this.getChildById(this.container,
                                                                  'scrollable');
   this.lineheight              = this.getChildById(this.container,
@@ -646,6 +981,9 @@ VT100.prototype.initializeElements = function(container) {
   // Hide context menu
   this.hideContextMenu();
 
+  // Set up onscreen soft keyboard
+  this.initializeKeyboard();
+
   // Add listener to reconnect button
   this.addListener(this.reconnectBtn.firstChild, 'click',
                    function(vt100) {
@@ -733,6 +1071,7 @@ VT100.prototype.reconnect = function() {
 
 VT100.prototype.showReconnect = function(state) {
   if (state) {
+    this.hideSoftKeyboard();
     this.reconnectBtn.style.visibility = '';
   } else {
     this.reconnectBtn.style.visibility = 'hidden';
@@ -766,6 +1105,9 @@ VT100.prototype.resized = function(w, h) {
 };
 
 VT100.prototype.resizer = function() {
+  // Hide onscreen soft keyboard
+  this.hideSoftKeyboard();
+
   // The cursor can get corrupted if the print-preview is displayed in Firefox.
   // Recreating it, will repair it.
   var newCursor                = document.createElement('pre');
@@ -945,6 +1287,17 @@ VT100.prototype.cancelEvent = function(event) {
   return false;
 };
 
+VT100.prototype.mousePosition = function(event) {
+  var offsetX      = this.container.offsetLeft;
+  var offsetY      = this.container.offsetTop;
+  for (var e = this.container; e = e.offsetParent; ) {
+    offsetX       += e.offsetLeft;
+    offsetY       += e.offsetTop;
+  }
+  return [ event.clientX - offsetX,
+           event.clientY - offsetY ];
+};
+
 VT100.prototype.mouseEvent = function(event, type) {
   // If any text is currently selected, do not move the focus as that would
   // invalidate the selection.
@@ -954,15 +1307,10 @@ VT100.prototype.mouseEvent = function(event, type) {
   }
 
   // Compute mouse position in characters.
-  var offsetX      = this.container.offsetLeft;
-  var offsetY      = this.container.offsetTop;
-  for (var e = this.container; e = e.offsetParent; ) {
-    offsetX       += e.offsetLeft;
-    offsetY       += e.offsetTop;
-  }
-  var x            = (event.clientX - offsetX) / this.cursorWidth;
-  var y            = ((event.clientY - offsetY) + this.scrollable.offsetTop) /
-                     this.cursorHeight - this.numScrollbackLines;
+  var position     = this.mousePosition(event);
+  var x            = Math.floor(position[0] / this.cursorWidth);
+  var y            = Math.floor((position[1] + this.scrollable.scrollTop) /
+                                this.cursorHeight) - this.numScrollbackLines;
   var inside       = true;
   if (x >= this.terminalWidth) {
     x              = this.terminalWidth - 1;
@@ -1022,7 +1370,7 @@ VT100.prototype.mouseEvent = function(event, type) {
   // Bring up context menu.
   if (button == 2 && !event.shiftKey) {
     if (type == 0 /* MOUSE_DOWN */) {
-      this.showContextMenu(event.clientX - offsetX, event.clientY - offsetY);
+      this.showContextMenu(position[0], position[1]);
     }
     return this.cancelEvent(event);
   }
@@ -1058,6 +1406,29 @@ VT100.prototype.getTextContent = function(elem) {
          (typeof elem.textContent == 'undefined' ? elem.innerText : '');
 };
 
+VT100.prototype.setTextContentRaw = function(elem, s) {
+  // Updating the content of an element is an expensive operation. It actually
+  // pays off to first check whether the element is still unchanged.
+  if (typeof elem.textContent == 'undefined') {
+    if (elem.innerText != s) {
+      try {
+        elem.innerText = s;
+      } catch (e) {
+        // Very old versions of IE do not allow setting innerText. Instead,
+        // remove all children, by setting innerHTML and then set the text
+        // using DOM methods.
+        elem.innerHTML = '';
+        elem.appendChild(document.createTextNode(
+                                          this.replaceChar(s, ' ', '\u00A0')));
+      }
+    }
+  } else {
+    if (elem.textContent != s) {
+      elem.textContent = s;
+    }
+  }
+};
+
 VT100.prototype.setTextContent = function(elem, s) {
   // Check if we find any URLs in the text. If so, automatically convert them
   // to links.
@@ -1103,26 +1474,7 @@ VT100.prototype.setTextContent = function(elem, s) {
     return;
   }
 
-  // Updating the content of an element is an expensive operation. It actually
-  // pays off to first check whether the element is still unchanged.
-  if (typeof elem.textContent == 'undefined') {
-    if (elem.innerText != s) {
-      try {
-        elem.innerText = s;
-      } catch (e) {
-        // Very old versions of IE do not allow setting innerText. Instead,
-        // remove all children, by setting innerHTML and then set the text
-        // using DOM methods.
-        elem.innerHTML = '';
-        elem.appendChild(document.createTextNode(
-                                          this.replaceChar(s, ' ', '\u00A0')));
-      }
-    }
-  } else {
-    if (elem.textContent != s) {
-      elem.textContent = s;
-    }
-  }
+  this.setTextContentRaw(elem, s);
 };
 
 VT100.prototype.insertBlankLine = function(y, color, style) {
@@ -1578,27 +1930,21 @@ VT100.prototype.enableAlternateScreen = function(state) {
   this.console[this.currentScreen].style.display     = '';
 
   // Select appropriate character pitch.
-  var styles                                         = [ 'transform',
-                                                         'WebkitTransform',
-                                                         'MozTransform',
-                                                         'filter' ];
-  for (var i = 0; i < styles.length; ++i) {
-    if (typeof this.console[0].style[styles[i]] != 'undefined') {
-      if (state) {
-        // Upon enabling the alternate screen, we switch to 80 column mode. But
-        // upon returning to the regular screen, we restore the mode that was
-        // in effect previously.
-        this.console[1].style[styles[i]]             = '';
-      }
-      var style                                      =
-                             this.console[this.currentScreen].style[styles[i]];
-      this.cursor.style[styles[i]]                   = style;
-      this.space.style[styles[i]]                    = style;
-      this.scale                                     = style == '' ? 1.0:1.65;
-      if (styles[i] == 'filter') {
-        this.console[this.currentScreen].style.width = style == '' ? '165%':'';
-      }
-      break;
+  var transform                                      = this.getTransformName();
+  if (transform) {
+    if (state) {
+      // Upon enabling the alternate screen, we switch to 80 column mode. But
+      // upon returning to the regular screen, we restore the mode that was
+      // in effect previously.
+      this.console[1].style[transform]               = '';
+    }
+    var style                                        =
+                             this.console[this.currentScreen].style[transform];
+    this.cursor.style[transform]                     = style;
+    this.space.style[transform]                      = style;
+    this.scale                                       = style == '' ? 1.0:1.65;
+    if (transform == 'filter') {
+       this.console[this.currentScreen].style.width  = style == '' ? '165%':'';
     }
   }
   this.resizer();
@@ -1969,12 +2315,76 @@ VT100.prototype.toggleBell = function() {
   this.visualBell = !this.visualBell;
 };
 
+VT100.prototype.toggleSoftKeyboard = function() {
+  this.softKeyboard = !this.softKeyboard;
+  this.keyboardImage.style.visibility = this.softKeyboard ? 'visible' : '';
+};
+
+VT100.prototype.deselectKeys = function(elem) {
+  if (elem && elem.className == 'selected') {
+    elem.className = '';
+  }
+  for (elem = elem.firstChild; elem; elem = elem.nextSibling) {
+    this.deselectKeys(elem);
+  }
+};
+
+VT100.prototype.showSoftKeyboard = function() {
+  // Make sure no key is currently selected
+  this.lastSelectedKey           = undefined;
+  this.deselectKeys(this.keyboard);
+  this.isShift                   = false;
+  this.showShiftState(false);
+  this.isCtrl                    = false;
+  this.showCtrlState(false);
+  this.isAlt                     = false;
+  this.showAltState(false);
+
+  this.keyboard.style.left       = '0px';
+  this.keyboard.style.top        = '0px';
+  this.keyboard.style.width      = this.container.offsetWidth  + 'px';
+  this.keyboard.style.height     = this.container.offsetHeight + 'px';
+  this.keyboard.style.visibility = 'hidden';
+  this.keyboard.style.display    = '';
+
+  var kbd                        = this.keyboard.firstChild;
+  var scale                      = 1.0;
+  var transform                  = this.getTransformName();
+  if (transform) {
+    kbd.style[transform]         = '';
+    if (kbd.offsetWidth > 0.9 * this.container.offsetWidth) {
+      scale                      = (kbd.offsetWidth/
+                                    this.container.offsetWidth)/0.9;
+    }
+    if (kbd.offsetHeight > 0.9 * this.container.offsetHeight) {
+      scale                      = Math.max((kbd.offsetHeight/
+                                             this.container.offsetHeight)/0.9);
+    }
+    var style                    = this.getTransformStyle(transform,
+                                              scale > 1.0 ? scale : undefined);
+    kbd.style[transform]         = style;
+  }
+  if (transform == 'filter') {
+    scale                        = 1.0;
+  }
+  kbd.style.left                 = ((this.container.offsetWidth -
+                                     kbd.offsetWidth/scale)/2) + 'px';
+  kbd.style.top                  = ((this.container.offsetHeight -
+                                     kbd.offsetHeight/scale)/2) + 'px';
+
+  this.keyboard.style.visibility = 'visible';
+};
+
+VT100.prototype.hideSoftKeyboard = function() {
+  this.keyboard.style.display    = 'none';
+};
+
 VT100.prototype.toggleCursorBlinking = function() {
   this.blinkingCursor = !this.blinkingCursor;
 };
 
 VT100.prototype.about = function() {
-  alert("VT100 Terminal Emulator " + "2.10 (revision 220)" +
+  alert("VT100 Terminal Emulator " + "2.10 (revision 221)" +
         "\nCopyright 2008-2010 by Markus Gutschke\n" +
         "For more information check http://shellinabox.com");
 };
@@ -2007,6 +2417,9 @@ VT100.prototype.showContextMenu = function(x, y) {
           '
  • ' +
              (this.visualBell ? '' : '') +
              'Visual Bell
    • '+
+          '
  • ' +
+             (this.softKeyboard ? '' : '') +
+             'Onscreen Keyboard
    • ' +
           '
  • ' +
              (this.blinkingCursor ? '' : '') +
              'Blinking Cursor
    • '+
@@ -2038,6 +2451,7 @@ VT100.prototype.showContextMenu = function(x, y) {
   // Actions for default items
   var actions                 = [ this.copyLast, p, this.reset,
                                   this.toggleUTF, this.toggleBell,
+                                  this.toggleSoftKeyboard,
                                   this.toggleCursorBlinking ];
 
   // Actions for user CSS styles (if any)
@@ -2093,26 +2507,30 @@ VT100.prototype.showContextMenu = function(x, y) {
   }
 
   // Position menu next to the mouse pointer
-  if (x + popup.clientWidth > this.container.offsetWidth) {
-    x                         = this.container.offsetWidth - popup.clientWidth;
+  this.menu.style.left        = '0px';
+  this.menu.style.top         = '0px';
+  this.menu.style.width       =  this.container.offsetWidth  + 'px';
+  this.menu.style.height      =  this.container.offsetHeight + 'px';
+  popup.style.left            = '0px';
+  popup.style.top             = '0px';
+  
+  var margin                  = 2;
+  if (x + popup.clientWidth >= this.container.offsetWidth - margin) {
+    x              = this.container.offsetWidth-popup.clientWidth - margin - 1;
   }
-  if (x < 0) {
-    x                         = 0;
+  if (x < margin) {
+    x                         = margin;
   }
-  if (y + popup.clientHeight > this.container.offsetHeight) {
-    y                         = this.container.offsetHeight-popup.clientHeight;
+  if (y + popup.clientHeight >= this.container.offsetHeight - margin) {
+    y            = this.container.offsetHeight-popup.clientHeight - margin - 1;
   }
-  if (y < 0) {
-    y                         = 0;
+  if (y < margin) {
+    y                         = margin;
   }
   popup.style.left            = x + 'px';
   popup.style.top             = y + 'px';
 
   // Block all other interactions with the terminal emulator
-  this.menu.style.left        = '0px';
-  this.menu.style.top         = '0px';
-  this.menu.style.width       =  this.container.offsetWidth  + 'px';
-  this.menu.style.height      =  this.container.offsetHeight + 'px';
   this.addListener(this.menu, 'click', function(vt100) {
                                          return function() {
                                            vt100.hideContextMenu();
@@ -2895,39 +3313,42 @@ VT100.prototype.restoreCursor = function() {
               this.savedY[this.currentScreen]);
 };
 
-VT100.prototype.set80_132Mode = function(state) {
-  var transform                                       = undefined;
-  var styles                                          = [ 'transform',
-                                                          'WebkitTransform',
-                                                          'MozTransform',
-                                                          'filter'
-                                                        ];
+VT100.prototype.getTransformName = function() {
+  var styles = [ 'transform', 'WebkitTransform', 'MozTransform', 'filter' ];
   for (var i = 0; i < styles.length; ++i) {
     if (typeof this.console[0].style[styles[i]] != 'undefined') {
-      transform                                       = styles[i];
-      break;
+      return styles[i];
     }
   }
+  return undefined;
+};
 
+VT100.prototype.getTransformStyle = function(transform, scale) {
+  return scale && scale != 1.0
+    ? transform == 'filter'
+      ? 'progid:DXImageTransform.Microsoft.Matrix(' +
+                                 'M11=' + (1.0/scale) + ',M12=0,M21=0,M22=1,' +
+                                 "sizingMethod='auto expand')"
+      : 'translateX(-50%) ' +
+        'scaleX(' + (1.0/scale) + ') ' +
+        'translateX(50%)'
+    : '';
+};
+
+VT100.prototype.set80_132Mode = function(state) {
+  var transform                  = this.getTransformName();
   if (transform) {
     if ((this.console[this.currentScreen].style[transform] != '') == state) {
       return;
     }
-    var style                                         =
-      state ? transform == 'filter'
-            ? 'progid:DXImageTransform.Microsoft.Matrix(' +
-                             'M11=0.606060606060606060606,M12=0,M21=0,M22=1,' +
-                             "sizingMethod='auto expand')"
-            : 'translateX(-50%) ' +
-              'scaleX(0.606060606060606060606) ' +
-              'translateX(50%)'
-            : '';
+    var style                    = state ?
+                                   this.getTransformStyle(transform, 1.65):'';
     this.console[this.currentScreen].style[transform] = style;
-    this.cursor.style[transform]                      = style;
-    this.space.style[transform]                       = style;
-    this.scale                                        = state ? 1.65 : 1.0;
+    this.cursor.style[transform] = style;
+    this.space.style[transform]  = style;
+    this.scale                   = state ? 1.65 : 1.0;
     if (transform == 'filter') {
-      this.console[this.currentScreen].style.width    = state ? '165%' : '';
+      this.console[this.currentScreen].style.width = state ? '165%' : '';
     }
     this.resizer();
   }
diff --git a/shellinabox/vt100.jspp b/shellinabox/vt100.jspp
index d5c2898..b1a0240 100644
--- a/shellinabox/vt100.jspp
+++ b/shellinabox/vt100.jspp
@@ -238,22 +238,16 @@ VT100.prototype.reset = function(clearHistory) {
   this.enableAlternateScreen(false);
 
   var wasCompressed                                  = false;
-  var styles                                         = [ 'transform',
-                                                         'WebkitTransform',
-                                                         'MozTransform',
-                                                         'filter' ];
-  for (var i = 0; i < styles.length; ++i) {
-    if (typeof this.console[0].style[styles[i]] != 'undefined') {
-      for (var j = 0; j < 1; ++j) {
-        wasCompressed                |= this.console[j].style[styles[i]] != '';
-        this.console[j].style[styles[i]]             = '';
-      }
-      this.cursor.style[styles[i]]                   = '';
-      this.space.style[styles[i]]                    = '';
-      if (styles[i] == 'filter') {
-        this.console[this.currentScreen].style.width = '';
-      }
-      break;
+  var transform                                      = this.getTransformName();
+  if (transform) {
+    for (var i = 0; i < 2; ++i) {
+      wasCompressed                  |= this.console[i].style[transform] != '';
+      this.console[i].style[transform]               = '';
+    }
+    this.cursor.style[transform]                     = '';
+    this.space.style[transform]                      = '';
+    if (transform == 'filter') {
+      this.console[this.currentScreen].style.width   = '';
     }
   }
   this.scale                                         = 1.0;
@@ -270,10 +264,13 @@ VT100.prototype.reset = function(clearHistory) {
 };
 
 VT100.prototype.addListener = function(elem, event, listener) {
-  if (elem.addEventListener) {
-    elem.addEventListener(event, listener, false);
-  } else {
-    elem.attachEvent('on' + event, listener);
+  try {
+    if (elem.addEventListener) {
+      elem.addEventListener(event, listener, false);
+    } else {
+      elem.attachEvent('on' + event, listener);
+    }
+  } catch (e) {
   }
 };
 
@@ -281,11 +278,12 @@ VT100.prototype.getUserSettings = function() {
   // Compute hash signature to identify the entries in the userCSS menu.
   // If the menu is unchanged from last time, default values can be
   // looked up in a cookie associated with this page.
-  this.signature            = 2;
+  this.signature            = 3;
   this.utfPreferred         = true;
   this.visualBell           = typeof suppressAllAudio != 'undefined' &&
                               suppressAllAudio;
   this.autoprint            = true;
+  this.softKeyboard         = false;
   this.blinkingCursor       = true;
   if (this.visualBell) {
     this.signature          = Math.floor(16807*this.signature + 1) %
@@ -311,15 +309,16 @@ VT100.prototype.getUserSettings = function() {
   if (settings >= 0) {
     settings                = document.cookie.substr(settings + key.length).
                                                    replace(/([0-1]*).*/, "$1");
-    if (settings.length == 3 + (typeof userCSSList == 'undefined' ?
+    if (settings.length == 5 + (typeof userCSSList == 'undefined' ?
                                 0 : userCSSList.length)) {
       this.utfPreferred     = settings.charAt(0) != '0';
       this.visualBell       = settings.charAt(1) != '0';
       this.autoprint        = settings.charAt(2) != '0';
-      this.blinkingCursor   = settings.charAt(3) != '0';
+      this.softKeyboard     = settings.charAt(3) != '0';
+      this.blinkingCursor   = settings.charAt(4) != '0';
       if (typeof userCSSList != 'undefined') {
         for (var i = 0; i < userCSSList.length; ++i) {
-          userCSSList[i][2] = settings.charAt(i + 3) != '0';
+          userCSSList[i][2] = settings.charAt(i + 5) != '0';
         }
       }
     }
@@ -332,6 +331,7 @@ VT100.prototype.storeUserSettings = function() {
                   (this.utfEnabled     ? '1' : '0') +
                   (this.visualBell     ? '1' : '0') +
                   (this.autoprint      ? '1' : '0') +
+                  (this.softKeyboard   ? '1' : '0') +
                   (this.blinkingCursor ? '1' : '0');
   if (typeof userCSSList != 'undefined') {
     for (var i = 0; i < userCSSList.length; ++i) {
@@ -413,7 +413,7 @@ VT100.prototype.initializeUserCSSStyles = function() {
                         label.textContent= label.textContent;
                       }
 
-                      // User style sheets are number sequentially
+                      // User style sheets are numbered sequentially
                       var sheet          = document.getElementById(
                                                                'usercss-' + i);
                       if (i == current) {
@@ -470,6 +470,328 @@ VT100.prototype.initializeUserCSSStyles = function() {
   }
 };
 
+VT100.prototype.resetLastSelectedKey = function(e) {
+  var key                          = this.lastSelectedKey;
+  if (!key) {
+    return false;
+  }
+
+  var position                     = this.mousePosition(e);
+
+  // We don't get all the necessary events to reliably reselect a key
+  // if we moved away from it and then back onto it. We approximate the
+  // behavior by remembering the key until either we release the mouse
+  // button (we might never get this event if the mouse has since left
+  // the window), or until we move away too far.
+  var box                          = this.keyboard.firstChild;
+  if (position[0] <  box.offsetLeft + key.offsetWidth ||
+      position[1] <  box.offsetTop + key.offsetHeight ||
+      position[0] >= box.offsetLeft + box.offsetWidth - key.offsetWidth ||
+      position[1] >= box.offsetTop + box.offsetHeight - key.offsetHeight ||
+      position[0] <  box.offsetLeft + key.offsetLeft - key.offsetWidth ||
+      position[1] <  box.offsetTop + key.offsetTop - key.offsetHeight ||
+      position[0] >= box.offsetLeft + key.offsetLeft + 2*key.offsetWidth ||
+      position[1] >= box.offsetTop + key.offsetTop + 2*key.offsetHeight) {
+    if (this.lastSelectedKey.className) log.console('reset: deselecting');
+    this.lastSelectedKey.className = '';
+    this.lastSelectedKey           = undefined;
+  }
+  return false;
+};
+
+VT100.prototype.showShiftState = function(state) {
+  var style              = document.getElementById('shift_state');
+  if (state) {
+    this.setTextContentRaw(style,
+                           '#vt100 #keyboard .shifted {' +
+                             'display: inline }' +
+                           '#vt100 #keyboard .unshifted {' +
+                             'display: none }');
+  } else {
+    this.setTextContentRaw(style, '');
+  }
+  var elems              = this.keyboard.getElementsByTagName('I');
+  for (var i = 0; i < elems.length; ++i) {
+    if (elems[i].id == '16') {
+      elems[i].className = state ? 'selected' : '';
+    }
+  }
+};
+
+VT100.prototype.showCtrlState = function(state) {
+  var ctrl         = this.getChildById(this.keyboard, '17' /* Ctrl */);
+  if (ctrl) {
+    ctrl.className = state ? 'selected' : '';
+  }
+};
+
+VT100.prototype.showAltState = function(state) {
+  var alt         = this.getChildById(this.keyboard, '18' /* Alt */);
+  if (alt) {
+    alt.className = state ? 'selected' : '';
+  }
+};
+
+VT100.prototype.clickedKeyboard = function(e, elem, ch, key, shift, ctrl, alt){
+  var fake      = [ ];
+  fake.charCode = ch;
+  fake.keyCode  = key;
+  fake.ctrlKey  = ctrl;
+  fake.shiftKey = shift;
+  fake.altKey   = alt;
+  fake.metaKey  = alt;
+  return this.handleKey(fake);
+};
+
+VT100.prototype.addKeyBinding = function(elem, ch, key, CH, KEY) {
+  if (elem == undefined) {
+    return;
+  }
+  if (ch == '\u00A0') {
+    //   should be treated as a regular space character.
+    ch                                  = ' ';
+  }
+  if (ch != undefined && CH == undefined) {
+    // For letter keys, we automatically compute the uppercase character code
+    // from the lowercase one.
+    CH                                  = ch.toUpperCase();
+  }
+  if (KEY == undefined && key != undefined) {
+    // Most keys have identically key codes for both lowercase and uppercase
+    // keypresses. Normally, only function keys would have distinct key codes,
+    // whereas regular keys have character codes.
+    KEY                                 = key;
+  } else if (KEY == undefined && CH != undefined) {
+    // For regular keys, copy the character code to the key code.
+    KEY                                 = CH.charCodeAt(0);
+  }
+  if (key == undefined && ch != undefined) {
+    // For regular keys, copy the character code to the key code.
+    key                                 = ch.charCodeAt(0);
+  }
+  // Convert characters to numeric character codes. If the character code
+  // is undefined (i.e. this is a function key), set it to zero.
+  ch                                    = ch ? ch.charCodeAt(0) : 0;
+  CH                                    = CH ? CH.charCodeAt(0) : 0;
+
+  // Mouse down events high light the key. We also set lastSelectedKey. This
+  // is needed to that mouseout/mouseover can keep track of the key that
+  // is currently being clicked.
+  this.addListener(elem, 'mousedown',
+    function(vt100, elem, key) { return function(e) {
+      if ((e.which || e.button) == 1) {
+        if (vt100.lastSelectedKey) {       
+          vt100.lastSelectedKey.className= '';
+        }
+        // Highlight the key while the mouse button is held down.
+        if (key == 16 /* Shift */) {
+          if (!elem.className != vt100.isShift) {
+            vt100.showShiftState(!vt100.isShift);
+          }
+        } else if (key == 17 /* Ctrl */) {
+          if (!elem.className != vt100.isCtrl) {
+            vt100.showCtrlState(!vt100.isCtrl);
+          }
+        } else if (key == 18 /* Alt */) {
+          if (!elem.className != vt100.isAlt) {
+            vt100.showAltState(!vt100.isAlt);
+          }
+        } else {
+          elem.className                  = 'selected';
+        }
+        vt100.lastSelectedKey             = elem;
+      }
+      return false; }; }(this, elem, key));
+  var clicked                           =
+    // Modifier keys update the state of the keyboard, but do not generate
+    // any key clicks that get forwarded to the application.
+    key >= 16 /* Shift */ && key <= 18 /* Alt */ ?
+    function(vt100, elem) { return function(e) {
+      if (elem == vt100.lastSelectedKey) {
+        if (key == 16 /* Shift */) {
+          // The user clicked the Shift key
+          vt100.isShift                 = !vt100.isShift;
+          vt100.showShiftState(vt100.isShift);
+        } else if (key == 17 /* Ctrl */) {
+          vt100.isCtrl                  = !vt100.isCtrl;
+          vt100.showCtrlState(vt100.isCtrl);
+        } else if (key == 18 /* Alt */) {
+          vt100.isAlt                   = !vt100.isAlt;
+          vt100.showAltState(vt100.isAlt);
+        }
+        vt100.lastSelectedKey           = undefined;
+      }
+      if (vt100.lastSelectedKey) {
+        vt100.lastSelectedKey.className = '';
+        vt100.lastSelectedKey           = undefined;
+      }
+      return false; }; }(this, elem) :
+    // Regular keys generate key clicks, when the mouse button is released or
+    // when a mouse click event is received.
+    function(vt100, elem, ch, key, CH, KEY) { return function(e) {
+      if (vt100.lastSelectedKey) {
+        if (elem == vt100.lastSelectedKey) {
+          // The user clicked a key.
+          if (vt100.isShift) {
+            vt100.clickedKeyboard(e, elem, CH, KEY,
+                                  true, vt100.isCtrl, vt100.isAlt);
+          } else {
+            vt100.clickedKeyboard(e, elem, ch, key,
+                                  false, vt100.isCtrl, vt100.isAlt);
+          }
+          vt100.isShift                 = false;
+          vt100.showShiftState(false);
+          vt100.isCtrl                  = false;
+          vt100.showCtrlState(false);
+          vt100.isAlt                   = false;
+          vt100.showAltState(false);
+        }
+        vt100.lastSelectedKey.className = '';
+        vt100.lastSelectedKey           = undefined;
+      }
+      elem.className                    = '';
+      return false; }; }(this, elem, ch, key, CH, KEY);
+  this.addListener(elem, 'mouseup', clicked);
+  this.addListener(elem, 'click', clicked);
+
+  // When moving the mouse away from a key, check if any keys need to be
+  // deselected.
+  this.addListener(elem, 'mouseout',
+    function(vt100, elem, key) { return function(e) {
+      if (key == 16 /* Shift */) {
+        if (!elem.className == vt100.isShift) {
+          vt100.showShiftState(vt100.isShift);
+        }
+      } else if (key == 17 /* Ctrl */) {
+        if (!elem.className == vt100.isCtrl) {
+          vt100.showCtrlState(vt100.isCtrl);
+        }
+      } else if (key == 18 /* Alt */) {
+        if (!elem.className == vt100.isAlt) {
+          vt100.showAltState(vt100.isAlt);
+        }
+      } else if (elem.className) {
+        elem.className                  = '';
+        vt100.lastSelectedKey           = elem;
+      } else if (vt100.lastSelectedKey) {
+        vt100.resetLastSelectedKey(e);
+      }
+      return false; }; }(this, elem, key));
+
+  // When moving the mouse over a key, select it if the user is still holding
+  // the mouse button down (i.e. elem == lastSelectedKey)
+  this.addListener(elem, 'mouseover',
+    function(vt100, elem, key) { return function(e) {
+      if (elem == vt100.lastSelectedKey) {
+        if (key == 16 /* Shift */) {
+          if (!elem.className != vt100.isShift) {
+            vt100.showShiftState(!vt100.isShift);
+          }
+        } else if (key == 17 /* Ctrl */) {
+          if (!elem.className != vt100.isCtrl) {
+            vt100.showCtrlState(!vt100.isCtrl);
+          }
+        } else if (key == 18 /* Alt */) {
+          if (!elem.className != vt100.isAlt) {
+            vt100.showAltState(!vt100.isAlt);
+          }
+        } else if (!elem.className) {
+          elem.className                = 'selected';
+        }
+      } else {
+        vt100.resetLastSelectedKey(e);
+      }
+      return false; }; }(this, elem, key));
+};
+
+VT100.prototype.initializeKeyBindings = function(elem) {
+  if (elem) {
+    if (elem.nodeName == "I" || elem.nodeName == "B") {
+      if (elem.id) {
+        // Function keys. The Javascript keycode is part of the "id"
+        var i     = parseInt(elem.id);
+        if (i) {
+          // If the id does not parse as a number, it is not a keycode.
+          this.addKeyBinding(elem, undefined, i);
+        }
+      } else {
+        var child = elem.firstChild;
+        if (child.nodeName == "#text") {
+          // If the key only has a text node as a child, then it is a letter.
+          // Automatically compute the lower and upper case version of the key.
+          this.addKeyBinding(elem, this.getTextContent(child).toLowerCase());
+        } else {
+          // If the key has two children, they are the lower and upper case
+          // character code, respectively.
+          this.addKeyBinding(elem, this.getTextContent(child), undefined,
+                             this.getTextContent(child.nextSibling));
+        }
+      }
+    }
+  }
+  // Recursively parse all other child nodes.
+  for (elem = elem.firstChild; elem; elem = elem.nextSibling) {
+    this.initializeKeyBindings(elem);
+  }
+};
+
+VT100.prototype.initializeKeyboard = function() {
+  // Configure mouse event handlers for button that displays/hides keyboard
+  var box                               = this.keyboard.firstChild;
+  this.hideSoftKeyboard();
+  this.addListener(this.keyboardImage, 'click',
+    function(vt100) { return function(e) {
+      if (vt100.keyboard.style.display != '') {
+        if (vt100.reconnectBtn.style.visibility != '') {
+          vt100.showSoftKeyboard();
+        }
+      } else {
+        vt100.hideSoftKeyboard();
+        vt100.input.focus();
+      }
+      return false; }; }(this));
+
+  // Enable button that displays keyboard
+  if (this.softKeyboard) {
+    this.keyboardImage.style.visibility = 'visible';
+  }
+
+  // Configure mouse event handlers for on-screen keyboard
+  this.addListener(this.keyboard, 'click',
+    function(vt100) { return function(e) {
+      vt100.hideSoftKeyboard();
+      vt100.input.focus();
+      return false; }; }(this));
+  this.addListener(this.keyboard, 'selectstart', this.cancelEvent);
+  this.addListener(box, 'click', this.cancelEvent);
+  this.addListener(box, 'mouseup',
+    function(vt100) { return function(e) {
+      if (vt100.lastSelectedKey) {
+        vt100.lastSelectedKey.className = '';
+        vt100.lastSelectedKey           = undefined;
+      }
+      return false; }; }(this));
+  this.addListener(box, 'mouseout',
+    function(vt100) { return function(e) {
+      return vt100.resetLastSelectedKey(e); }; }(this));
+  this.addListener(box, 'mouseover',
+    function(vt100) { return function(e) {
+      return vt100.resetLastSelectedKey(e); }; }(this));
+
+  // Configure SHIFT key behavior
+  var style                             = document.createElement('style');
+  var id                                = document.createAttribute('id');
+  id.nodeValue                          = 'shift_state';
+  style.setAttributeNode(id);
+  var type                              = document.createAttribute('type');
+  type.nodeValue                        = 'text/css';
+  style.setAttributeNode(type);
+  document.getElementsByTagName('head')[0].appendChild(style);
+
+  // Set up key bindings
+  this.initializeKeyBindings(box);
+};
+
 VT100.prototype.initializeElements = function(container) {
   // If the necessary objects have not already been defined in the HTML
   // page, create them now.
@@ -483,6 +805,9 @@ VT100.prototype.initializeElements = function(container) {
 
   if (!this.getChildById(this.container, 'reconnect')   ||
       !this.getChildById(this.container, 'menu')        ||
+      !this.getChildById(this.container, 'keyboard')    ||
+      !this.getChildById(this.container, 'kbd_button')  ||
+      !this.getChildById(this.container, 'kbd_img')     ||
       !this.getChildById(this.container, 'scrollable')  ||
       !this.getChildById(this.container, 'console')     ||
       !this.getChildById(this.container, 'alt_console') ||
@@ -525,7 +850,15 @@ VT100.prototype.initializeElements = function(container) {
                        '' +
                        '' +
+                       '
    ' +
+                         KEYBOARD +
+                       '
    ' +
                        '
    ' +
+                         '' +
+                           '' +
+                           '' +
+                           '' +
+                         '
         
    ' +
                          '
     
    ' +
                          '
    ' +
                            '
    ' +
@@ -566,6 +899,8 @@ VT100.prototype.initializeElements = function(container) {
   this.reconnectBtn            = this.getChildById(this.container,'reconnect');
   this.curSizeBox              = this.getChildById(this.container, 'cursize');
   this.menu                    = this.getChildById(this.container, 'menu');
+  this.keyboard                = this.getChildById(this.container, 'keyboard');
+  this.keyboardImage           = this.getChildById(this.container, 'kbd_img');
   this.scrollable              = this.getChildById(this.container,
                                                                  'scrollable');
   this.lineheight              = this.getChildById(this.container,
@@ -646,6 +981,9 @@ VT100.prototype.initializeElements = function(container) {
   // Hide context menu
   this.hideContextMenu();
 
+  // Set up onscreen soft keyboard
+  this.initializeKeyboard();
+
   // Add listener to reconnect button
   this.addListener(this.reconnectBtn.firstChild, 'click',
                    function(vt100) {
@@ -733,6 +1071,7 @@ VT100.prototype.reconnect = function() {
 
 VT100.prototype.showReconnect = function(state) {
   if (state) {
+    this.hideSoftKeyboard();
     this.reconnectBtn.style.visibility = '';
   } else {
     this.reconnectBtn.style.visibility = 'hidden';
@@ -766,6 +1105,9 @@ VT100.prototype.resized = function(w, h) {
 };
 
 VT100.prototype.resizer = function() {
+  // Hide onscreen soft keyboard
+  this.hideSoftKeyboard();
+
   // The cursor can get corrupted if the print-preview is displayed in Firefox.
   // Recreating it, will repair it.
   var newCursor                = document.createElement('pre');
@@ -945,6 +1287,17 @@ VT100.prototype.cancelEvent = function(event) {
   return false;
 };
 
+VT100.prototype.mousePosition = function(event) {
+  var offsetX      = this.container.offsetLeft;
+  var offsetY      = this.container.offsetTop;
+  for (var e = this.container; e = e.offsetParent; ) {
+    offsetX       += e.offsetLeft;
+    offsetY       += e.offsetTop;
+  }
+  return [ event.clientX - offsetX,
+           event.clientY - offsetY ];
+};
+
 VT100.prototype.mouseEvent = function(event, type) {
   // If any text is currently selected, do not move the focus as that would
   // invalidate the selection.
@@ -954,15 +1307,10 @@ VT100.prototype.mouseEvent = function(event, type) {
   }
 
   // Compute mouse position in characters.
-  var offsetX      = this.container.offsetLeft;
-  var offsetY      = this.container.offsetTop;
-  for (var e = this.container; e = e.offsetParent; ) {
-    offsetX       += e.offsetLeft;
-    offsetY       += e.offsetTop;
-  }
-  var x            = (event.clientX - offsetX) / this.cursorWidth;
-  var y            = ((event.clientY - offsetY) + this.scrollable.offsetTop) /
-                     this.cursorHeight - this.numScrollbackLines;
+  var position     = this.mousePosition(event);
+  var x            = Math.floor(position[0] / this.cursorWidth);
+  var y            = Math.floor((position[1] + this.scrollable.scrollTop) /
+                                this.cursorHeight) - this.numScrollbackLines;
   var inside       = true;
   if (x >= this.terminalWidth) {
     x              = this.terminalWidth - 1;
@@ -1022,7 +1370,7 @@ VT100.prototype.mouseEvent = function(event, type) {
   // Bring up context menu.
   if (button == 2 && !event.shiftKey) {
     if (type == MOUSE_DOWN) {
-      this.showContextMenu(event.clientX - offsetX, event.clientY - offsetY);
+      this.showContextMenu(position[0], position[1]);
     }
     return this.cancelEvent(event);
   }
@@ -1058,6 +1406,29 @@ VT100.prototype.getTextContent = function(elem) {
          (typeof elem.textContent == 'undefined' ? elem.innerText : '');
 };
 
+VT100.prototype.setTextContentRaw = function(elem, s) {
+  // Updating the content of an element is an expensive operation. It actually
+  // pays off to first check whether the element is still unchanged.
+  if (typeof elem.textContent == 'undefined') {
+    if (elem.innerText != s) {
+      try {
+        elem.innerText = s;
+      } catch (e) {
+        // Very old versions of IE do not allow setting innerText. Instead,
+        // remove all children, by setting innerHTML and then set the text
+        // using DOM methods.
+        elem.innerHTML = '';
+        elem.appendChild(document.createTextNode(
+                                          this.replaceChar(s, ' ', '\u00A0')));
+      }
+    }
+  } else {
+    if (elem.textContent != s) {
+      elem.textContent = s;
+    }
+  }
+};
+
 VT100.prototype.setTextContent = function(elem, s) {
   // Check if we find any URLs in the text. If so, automatically convert them
   // to links.
@@ -1103,26 +1474,7 @@ VT100.prototype.setTextContent = function(elem, s) {
     return;
   }
 
-  // Updating the content of an element is an expensive operation. It actually
-  // pays off to first check whether the element is still unchanged.
-  if (typeof elem.textContent == 'undefined') {
-    if (elem.innerText != s) {
-      try {
-        elem.innerText = s;
-      } catch (e) {
-        // Very old versions of IE do not allow setting innerText. Instead,
-        // remove all children, by setting innerHTML and then set the text
-        // using DOM methods.
-        elem.innerHTML = '';
-        elem.appendChild(document.createTextNode(
-                                          this.replaceChar(s, ' ', '\u00A0')));
-      }
-    }
-  } else {
-    if (elem.textContent != s) {
-      elem.textContent = s;
-    }
-  }
+  this.setTextContentRaw(elem, s);
 };
 
 VT100.prototype.insertBlankLine = function(y, color, style) {
@@ -1578,27 +1930,21 @@ VT100.prototype.enableAlternateScreen = function(state) {
   this.console[this.currentScreen].style.display     = '';
 
   // Select appropriate character pitch.
-  var styles                                         = [ 'transform',
-                                                         'WebkitTransform',
-                                                         'MozTransform',
-                                                         'filter' ];
-  for (var i = 0; i < styles.length; ++i) {
-    if (typeof this.console[0].style[styles[i]] != 'undefined') {
-      if (state) {
-        // Upon enabling the alternate screen, we switch to 80 column mode. But
-        // upon returning to the regular screen, we restore the mode that was
-        // in effect previously.
-        this.console[1].style[styles[i]]             = '';
-      }
-      var style                                      =
-                             this.console[this.currentScreen].style[styles[i]];
-      this.cursor.style[styles[i]]                   = style;
-      this.space.style[styles[i]]                    = style;
-      this.scale                                     = style == '' ? 1.0:1.65;
-      if (styles[i] == 'filter') {
-        this.console[this.currentScreen].style.width = style == '' ? '165%':'';
-      }
-      break;
+  var transform                                      = this.getTransformName();
+  if (transform) {
+    if (state) {
+      // Upon enabling the alternate screen, we switch to 80 column mode. But
+      // upon returning to the regular screen, we restore the mode that was
+      // in effect previously.
+      this.console[1].style[transform]               = '';
+    }
+    var style                                        =
+                             this.console[this.currentScreen].style[transform];
+    this.cursor.style[transform]                     = style;
+    this.space.style[transform]                      = style;
+    this.scale                                       = style == '' ? 1.0:1.65;
+    if (transform == 'filter') {
+       this.console[this.currentScreen].style.width  = style == '' ? '165%':'';
     }
   }
   this.resizer();
@@ -1969,6 +2315,70 @@ VT100.prototype.toggleBell = function() {
   this.visualBell = !this.visualBell;
 };
 
+VT100.prototype.toggleSoftKeyboard = function() {
+  this.softKeyboard = !this.softKeyboard;
+  this.keyboardImage.style.visibility = this.softKeyboard ? 'visible' : '';
+};
+
+VT100.prototype.deselectKeys = function(elem) {
+  if (elem && elem.className == 'selected') {
+    elem.className = '';
+  }
+  for (elem = elem.firstChild; elem; elem = elem.nextSibling) {
+    this.deselectKeys(elem);
+  }
+};
+
+VT100.prototype.showSoftKeyboard = function() {
+  // Make sure no key is currently selected
+  this.lastSelectedKey           = undefined;
+  this.deselectKeys(this.keyboard);
+  this.isShift                   = false;
+  this.showShiftState(false);
+  this.isCtrl                    = false;
+  this.showCtrlState(false);
+  this.isAlt                     = false;
+  this.showAltState(false);
+
+  this.keyboard.style.left       = '0px';
+  this.keyboard.style.top        = '0px';
+  this.keyboard.style.width      = this.container.offsetWidth  + 'px';
+  this.keyboard.style.height     = this.container.offsetHeight + 'px';
+  this.keyboard.style.visibility = 'hidden';
+  this.keyboard.style.display    = '';
+
+  var kbd                        = this.keyboard.firstChild;
+  var scale                      = 1.0;
+  var transform                  = this.getTransformName();
+  if (transform) {
+    kbd.style[transform]         = '';
+    if (kbd.offsetWidth > 0.9 * this.container.offsetWidth) {
+      scale                      = (kbd.offsetWidth/
+                                    this.container.offsetWidth)/0.9;
+    }
+    if (kbd.offsetHeight > 0.9 * this.container.offsetHeight) {
+      scale                      = Math.max((kbd.offsetHeight/
+                                             this.container.offsetHeight)/0.9);
+    }
+    var style                    = this.getTransformStyle(transform,
+                                              scale > 1.0 ? scale : undefined);
+    kbd.style[transform]         = style;
+  }
+  if (transform == 'filter') {
+    scale                        = 1.0;
+  }
+  kbd.style.left                 = ((this.container.offsetWidth -
+                                     kbd.offsetWidth/scale)/2) + 'px';
+  kbd.style.top                  = ((this.container.offsetHeight -
+                                     kbd.offsetHeight/scale)/2) + 'px';
+
+  this.keyboard.style.visibility = 'visible';
+};
+
+VT100.prototype.hideSoftKeyboard = function() {
+  this.keyboard.style.display    = 'none';
+};
+
 VT100.prototype.toggleCursorBlinking = function() {
   this.blinkingCursor = !this.blinkingCursor;
 };
@@ -2007,6 +2417,9 @@ VT100.prototype.showContextMenu = function(x, y) {
           '
  • ' +
              (this.visualBell ? '' : '') +
              'Visual Bell
    • '+
+          '
  • ' +
+             (this.softKeyboard ? '' : '') +
+             'Onscreen Keyboard
    • ' +
           '
  • ' +
              (this.blinkingCursor ? '' : '') +
              'Blinking Cursor
    • '+
@@ -2038,6 +2451,7 @@ VT100.prototype.showContextMenu = function(x, y) {
   // Actions for default items
   var actions                 = [ this.copyLast, p, this.reset,
                                   this.toggleUTF, this.toggleBell,
+                                  this.toggleSoftKeyboard,
                                   this.toggleCursorBlinking ];
 
   // Actions for user CSS styles (if any)
@@ -2093,26 +2507,30 @@ VT100.prototype.showContextMenu = function(x, y) {
   }
 
   // Position menu next to the mouse pointer
-  if (x + popup.clientWidth > this.container.offsetWidth) {
-    x                         = this.container.offsetWidth - popup.clientWidth;
+  this.menu.style.left        = '0px';
+  this.menu.style.top         = '0px';
+  this.menu.style.width       =  this.container.offsetWidth  + 'px';
+  this.menu.style.height      =  this.container.offsetHeight + 'px';
+  popup.style.left            = '0px';
+  popup.style.top             = '0px';
+  
+  var margin                  = 2;
+  if (x + popup.clientWidth >= this.container.offsetWidth - margin) {
+    x              = this.container.offsetWidth-popup.clientWidth - margin - 1;
   }
-  if (x < 0) {
-    x                         = 0;
+  if (x < margin) {
+    x                         = margin;
   }
-  if (y + popup.clientHeight > this.container.offsetHeight) {
-    y                         = this.container.offsetHeight-popup.clientHeight;
+  if (y + popup.clientHeight >= this.container.offsetHeight - margin) {
+    y            = this.container.offsetHeight-popup.clientHeight - margin - 1;
   }
-  if (y < 0) {
-    y                         = 0;
+  if (y < margin) {
+    y                         = margin;
   }
   popup.style.left            = x + 'px';
   popup.style.top             = y + 'px';
 
   // Block all other interactions with the terminal emulator
-  this.menu.style.left        = '0px';
-  this.menu.style.top         = '0px';
-  this.menu.style.width       =  this.container.offsetWidth  + 'px';
-  this.menu.style.height      =  this.container.offsetHeight + 'px';
   this.addListener(this.menu, 'click', function(vt100) {
                                          return function() {
                                            vt100.hideContextMenu();
@@ -2895,39 +3313,42 @@ VT100.prototype.restoreCursor = function() {
               this.savedY[this.currentScreen]);
 };
 
-VT100.prototype.set80_132Mode = function(state) {
-  var transform                                       = undefined;
-  var styles                                          = [ 'transform',
-                                                          'WebkitTransform',
-                                                          'MozTransform',
-                                                          'filter'
-                                                        ];
+VT100.prototype.getTransformName = function() {
+  var styles = [ 'transform', 'WebkitTransform', 'MozTransform', 'filter' ];
   for (var i = 0; i < styles.length; ++i) {
     if (typeof this.console[0].style[styles[i]] != 'undefined') {
-      transform                                       = styles[i];
-      break;
+      return styles[i];
     }
   }
+  return undefined;
+};
 
+VT100.prototype.getTransformStyle = function(transform, scale) {
+  return scale && scale != 1.0
+    ? transform == 'filter'
+      ? 'progid:DXImageTransform.Microsoft.Matrix(' +
+                                 'M11=' + (1.0/scale) + ',M12=0,M21=0,M22=1,' +
+                                 "sizingMethod='auto expand')"
+      : 'translateX(-50%) ' +
+        'scaleX(' + (1.0/scale) + ') ' +
+        'translateX(50%)'
+    : '';
+};
+
+VT100.prototype.set80_132Mode = function(state) {
+  var transform                  = this.getTransformName();
   if (transform) {
     if ((this.console[this.currentScreen].style[transform] != '') == state) {
       return;
     }
-    var style                                         =
-      state ? transform == 'filter'
-            ? 'progid:DXImageTransform.Microsoft.Matrix(' +
-                             'M11=0.606060606060606060606,M12=0,M21=0,M22=1,' +
-                             "sizingMethod='auto expand')"
-            : 'translateX(-50%) ' +
-              'scaleX(0.606060606060606060606) ' +
-              'translateX(50%)'
-            : '';
+    var style                    = state ?
+                                   this.getTransformStyle(transform, 1.65):'';
     this.console[this.currentScreen].style[transform] = style;
-    this.cursor.style[transform]                      = style;
-    this.space.style[transform]                       = style;
-    this.scale                                        = state ? 1.65 : 1.0;
+    this.cursor.style[transform] = style;
+    this.space.style[transform]  = style;
+    this.scale                   = state ? 1.65 : 1.0;
     if (transform == 'filter') {
-      this.console[this.currentScreen].style.width    = state ? '165%' : '';
+      this.console[this.currentScreen].style.width = state ? '165%' : '';
     }
     this.resizer();
   }