📄 edit_full.html
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<HTML>
<HEAD>
<SCRIPT type="text/javascript" src="vnumpad.js"></SCRIPT>
<SCRIPT><!--
var opened = false, vkb = null, text = null, insertionS = 0, insertionE = 0;
var userstr = navigator.userAgent.toLowerCase();
var isgecko = (userstr.indexOf('gecko') != -1) && (userstr.indexOf('applewebkit') == -1);
function numpad_change()
{
document.getElementById("switch").innerHTML = (opened ? "Show numpad" : "Hide numpad");
opened = !opened;
if(opened && !vkb)
{
vkb = new VNumpad("numpad", // container's id
pad_callback, // reference to the callback function
"", // font name ("" == system default)
"14px", // font size in px
"#000", // font color
"#FFF", // keyboard base background color
"#FFF", // keys' background color
"#777", // border color
true, // show key flash on click? (false by default)
"#CC3300", // font color for flash event
"#FF9966", // key background color for flash event
"#CC3300", // key border color for flash event
false, // embed VNumpad into the page?
true); // use 1-pixel gap between the keys?
}
else
vkb.Show(opened);
text = document.getElementById("textfield");
text.focus();
if(document.attachEvent)
text.attachEvent("onblur", backFocus);
}
function backFocus()
{
if(opened)
{
setRange(text, insertionS, insertionE);
text.focus();
}
}
// Advanced callback function:
//
function pad_callback(ch)
{
var val = text.value;
switch(ch)
{
case "BackSpace":
if(val.length)
{
var span = null;
if(document.selection)
span = document.selection.createRange().duplicate();
if(span && span.text.length > 0)
{
span.text = "";
getCaretPositions(text);
}
else
deleteAtCaret(text);
}
break;
default:
insertAtCaret(text, (ch == "Enter" ? (window.opera ? '\r\n' : '\n') : ch));
}
}
// This function retrieves the position (in chars, relative to
// the start of the text) of the edit cursor (caret), or, if
// text is selected in the TEXTAREA, the start and end positions
// of the selection.
//
function getCaretPositions(ctrl)
{
var CaretPosS = -1, CaretPosE = 0;
// Mozilla way:
if(ctrl.selectionStart || (ctrl.selectionStart == '0'))
{
CaretPosS = ctrl.selectionStart;
CaretPosE = ctrl.selectionEnd;
insertionS = CaretPosS == -1 ? CaretPosE : CaretPosS;
insertionE = CaretPosE;
}
// IE way:
else if(document.selection && ctrl.createTextRange)
{
var start = end = 0;
try
{
start = Math.abs(document.selection.createRange().moveStart("character", -10000000)); // start
if (start > 0)
{
try
{
var endReal = Math.abs(ctrl.createTextRange().moveEnd("character", -10000000));
var r = document.body.createTextRange();
r.moveToElementText(ctrl);
var sTest = Math.abs(r.moveStart("character", -10000000));
var eTest = Math.abs(r.moveEnd("character", -10000000));
if ((ctrl.tagName.toLowerCase() != 'input') && (eTest - endReal == sTest))
start -= sTest;
}
catch(err) {}
}
}
catch (e) {}
try
{
end = Math.abs(document.selection.createRange().moveEnd("character", -10000000)); // end
if(end > 0)
{
try
{
var endReal = Math.abs(ctrl.createTextRange().moveEnd("character", -10000000));
var r = document.body.createTextRange();
r.moveToElementText(ctrl);
var sTest = Math.abs(r.moveStart("character", -10000000));
var eTest = Math.abs(r.moveEnd("character", -10000000));
if ((ctrl.tagName.toLowerCase() != 'input') && (eTest - endReal == sTest))
end -= sTest;
}
catch(err) {}
}
}
catch (e) {}
insertionS = start;
insertionE = end
}
}
function setRange(ctrl, start, end)
{
if(ctrl.setSelectionRange) // Standard way (Mozilla, Opera, ...)
{
ctrl.setSelectionRange(start, end);
}
else // MS IE
{
var range;
try
{
range = ctrl.createTextRange();
}
catch(e)
{
try
{
range = document.body.createTextRange();
range.moveToElementText(ctrl);
}
catch(e)
{
range = null;
}
}
if(!range) return;
range.collapse(true);
range.moveStart("character", start);
range.moveEnd("character", end - start);
range.select();
}
insertionS = start;
insertionE = end;
}
function deleteSelection(ctrl)
{
if(insertionS == insertionE) return;
var tmp = (document.selection && !window.opera) ? ctrl.value.replace(/\r/g,"") : ctrl.value;
ctrl.value = tmp.substring(0, insertionS) + tmp.substring(insertionE, tmp.length);
setRange(ctrl, insertionS, insertionS);
}
function deleteAtCaret(ctrl)
{
// if(insertionE < insertionS) insertionE = insertionS;
if(insertionS != insertionE)
{
deleteSelection(ctrl);
return;
}
if(insertionS == insertionE)
insertionS = insertionS - 1;
var tmp = (document.selection && !window.opera) ? ctrl.value.replace(/\r/g,"") : ctrl.value;
ctrl.value = tmp.substring(0, insertionS) + tmp.substring(insertionE, tmp.length);
setRange(ctrl, insertionS, insertionS);
}
// This function inserts text at the caret position:
//
function insertAtCaret(ctrl, val)
{
if(insertionS != insertionE) deleteSelection(ctrl);
if(isgecko && document.createEvent && !window.opera)
{
var e = document.createEvent("KeyboardEvent");
if(e.initKeyEvent && ctrl.dispatchEvent)
{
e.initKeyEvent("keypress", // in DOMString typeArg,
false, // in boolean canBubbleArg,
true, // in boolean cancelableArg,
null, // in nsIDOMAbstractView viewArg, specifies UIEvent.view. This value may be null;
false, // in boolean ctrlKeyArg,
false, // in boolean altKeyArg,
false, // in boolean shiftKeyArg,
false, // in boolean metaKeyArg,
null, // key code;
val.charCodeAt(0));// char code.
ctrl.dispatchEvent(e);
}
}
else
{
var tmp = (document.selection && !window.opera) ? ctrl.value.replace(/\r/g,"") : ctrl.value;
ctrl.value = tmp.substring(0, insertionS) + val + tmp.substring(insertionS, tmp.length);
}
setRange(ctrl, insertionS + val.length, insertionS + val.length);
}
//--></SCRIPT></HEAD>
<BODY>
<P style="font-family:Tahoma;font-size:14px">Virtual keyboard/numpad installation.</P>
<TABLE border="0" width="60%">
<TR>
<TD width="100px"><TEXTAREA id="textfield" rows="2" cols="50" onkeyup="getCaretPositions(this);" onclick="getCaretPositions(this);"></TEXTAREA></TD>
</TR>
</TABLE>
<P><A href="javascript:numpad_change()" onclick="javascript:blur()" id="switch" style="font-family:Tahoma;font-size:14px;text-decoration:none;border-bottom: 1px dashed #0000F0;color:#0000F0">Show numpad</A></P>
<DIV id="numpad"></DIV>
</BODY></HTML>⌨️ 快捷键说明
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