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textinput.js
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textinput.js
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/* ***** BEGIN LICENSE BLOCK *****
* Distributed under the BSD license:
*
* Copyright (c) 2010, Ajax.org B.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Ajax.org B.V. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ***** END LICENSE BLOCK ***** */
define(function(require, exports, module) {
"use strict";
var event = require("../lib/event");
var useragent = require("../lib/useragent");
var dom = require("../lib/dom");
var lang = require("../lib/lang");
var BROKEN_SETDATA = useragent.isChrome < 18;
var USE_IE_MIME_TYPE = useragent.isIE;
var TextInput = function(parentNode, host) {
var text = dom.createElement("textarea");
text.className = "ace_text-input";
if (useragent.isTouchPad)
text.setAttribute("x-palm-disable-auto-cap", true);
text.setAttribute("wrap", "off");
text.setAttribute("autocorrect", "off");
text.setAttribute("autocapitalize", "off");
text.setAttribute("spellcheck", false);
text.style.opacity = "0";
if (useragent.isOldIE) text.style.top = "-1000px";
parentNode.insertBefore(text, parentNode.firstChild);
var PLACEHOLDER = "\x01\x01";
var copied = false;
var pasted = false;
var inComposition = false;
var tempStyle = '';
var isSelectionEmpty = true;
// FOCUS
// ie9 throws error if document.activeElement is accessed too soon
try { var isFocused = document.activeElement === text; } catch(e) {}
event.addListener(text, "blur", function(e) {
host.onBlur(e);
isFocused = false;
});
event.addListener(text, "focus", function(e) {
isFocused = true;
host.onFocus(e);
resetSelection();
});
this.focus = function() {
if (tempStyle) return text.focus();
var top = text.style.top;
text.style.position = "fixed";
text.style.top = "0px";
text.focus();
setTimeout(function() {
text.style.position = "";
if (text.style.top == "0px")
text.style.top = top;
}, 0);
};
this.blur = function() {
text.blur();
};
this.isFocused = function() {
return isFocused;
};
// modifying selection of blured textarea can focus it (chrome mac/linux)
var syncSelection = lang.delayedCall(function() {
isFocused && resetSelection(isSelectionEmpty);
});
var syncValue = lang.delayedCall(function() {
if (!inComposition) {
text.value = PLACEHOLDER;
isFocused && resetSelection();
}
});
function resetSelection(isEmpty) {
if (inComposition)
return;
// this prevents infinite recursion on safari 8
// see https://github.com/ajaxorg/ace/issues/2114
inComposition = true;
if (inputHandler) {
selectionStart = 0;
selectionEnd = isEmpty ? 0 : text.value.length - 1;
} else {
var selectionStart = isEmpty ? 2 : 1;
var selectionEnd = 2;
}
// on firefox this throws if textarea is hidden
try {
text.setSelectionRange(selectionStart, selectionEnd);
} catch(e){}
inComposition = false;
}
function resetValue() {
if (inComposition)
return;
text.value = PLACEHOLDER;
//http://code.google.com/p/chromium/issues/detail?id=76516
if (useragent.isWebKit)
syncValue.schedule();
}
useragent.isWebKit || host.addEventListener('changeSelection', function() {
if (host.selection.isEmpty() != isSelectionEmpty) {
isSelectionEmpty = !isSelectionEmpty;
syncSelection.schedule();
}
});
resetValue();
if (isFocused)
host.onFocus();
var isAllSelected = function(text) {
return text.selectionStart === 0 && text.selectionEnd === text.value.length;
};
// IE8 does not support setSelectionRange
if (!text.setSelectionRange && text.createTextRange) {
text.setSelectionRange = function(selectionStart, selectionEnd) {
var range = this.createTextRange();
range.collapse(true);
range.moveStart('character', selectionStart);
range.moveEnd('character', selectionEnd);
range.select();
};
isAllSelected = function(text) {
try {
var range = text.ownerDocument.selection.createRange();
}catch(e) {}
if (!range || range.parentElement() != text) return false;
return range.text == text.value;
}
}
if (useragent.isOldIE) {
var inPropertyChange = false;
var onPropertyChange = function(e){
if (inPropertyChange)
return;
var data = text.value;
if (inComposition || !data || data == PLACEHOLDER)
return;
// can happen either after delete or during insert operation
if (e && data == PLACEHOLDER[0])
return syncProperty.schedule();
sendText(data);
// ie8 calls propertychange handlers synchronously!
inPropertyChange = true;
resetValue();
inPropertyChange = false;
};
var syncProperty = lang.delayedCall(onPropertyChange);
event.addListener(text, "propertychange", onPropertyChange);
var keytable = { 13:1, 27:1 };
event.addListener(text, "keyup", function (e) {
if (inComposition && (!text.value || keytable[e.keyCode]))
setTimeout(onCompositionEnd, 0);
if ((text.value.charCodeAt(0)||0) < 129) {
return syncProperty.call();
}
inComposition ? onCompositionUpdate() : onCompositionStart();
});
// when user presses backspace after focusing the editor
// propertychange isn't called for the next character
event.addListener(text, "keydown", function (e) {
syncProperty.schedule(50);
});
}
var onSelect = function(e) {
if (copied) {
copied = false;
} else if (isAllSelected(text)) {
host.selectAll();
resetSelection();
} else if (inputHandler) {
resetSelection(host.selection.isEmpty());
}
};
var inputHandler = null;
this.setInputHandler = function(cb) {inputHandler = cb};
this.getInputHandler = function() {return inputHandler};
var afterContextMenu = false;
var sendText = function(data) {
if (inputHandler) {
data = inputHandler(data);
inputHandler = null;
}
if (pasted) {
resetSelection();
if (data)
host.onPaste(data);
pasted = false;
} else if (data == PLACEHOLDER.charAt(0)) {
if (afterContextMenu)
host.execCommand("del", {source: "ace"});
else // some versions of android do not fire keydown when pressing backspace
host.execCommand("backspace", {source: "ace"});
} else {
if (data.substring(0, 2) == PLACEHOLDER)
data = data.substr(2);
else if (data.charAt(0) == PLACEHOLDER.charAt(0))
data = data.substr(1);
else if (data.charAt(data.length - 1) == PLACEHOLDER.charAt(0))
data = data.slice(0, -1);
// can happen if undo in textarea isn't stopped
if (data.charAt(data.length - 1) == PLACEHOLDER.charAt(0))
data = data.slice(0, -1);
if (data)
host.onTextInput(data);
}
if (afterContextMenu)
afterContextMenu = false;
};
var onInput = function(e) {
// console.log("onInput", inComposition)
if (inComposition)
return;
var data = text.value;
sendText(data);
resetValue();
};
var handleClipboardData = function(e, data, forceIEMime) {
var clipboardData = e.clipboardData || window.clipboardData;
if (!clipboardData || BROKEN_SETDATA)
return;
// using "Text" doesn't work on old webkit but ie needs it
var mime = USE_IE_MIME_TYPE || forceIEMime ? "Text" : "text/plain";
try {
if (data) {
// Safari 5 has clipboardData object, but does not handle setData()
return clipboardData.setData(mime, data) !== false;
} else {
return clipboardData.getData(mime);
}
} catch(e) {
if (!forceIEMime)
return handleClipboardData(e, data, true);
}
};
var doCopy = function(e, isCut) {
var data = host.getCopyText();
if (!data)
return event.preventDefault(e);
if (handleClipboardData(e, data)) {
isCut ? host.onCut() : host.onCopy();
event.preventDefault(e);
} else {
copied = true;
text.value = data;
text.select();
setTimeout(function(){
copied = false;
resetValue();
resetSelection();
isCut ? host.onCut() : host.onCopy();
});
}
};
var onCut = function(e) {
doCopy(e, true);
};
var onCopy = function(e) {
doCopy(e, false);
};
var onPaste = function(e) {
var data = handleClipboardData(e);
if (typeof data == "string") {
if (data)
host.onPaste(data, e);
if (useragent.isIE)
setTimeout(resetSelection);
event.preventDefault(e);
}
else {
text.value = "";
pasted = true;
}
};
event.addCommandKeyListener(text, host.onCommandKey.bind(host));
event.addListener(text, "select", onSelect);
event.addListener(text, "input", onInput);
event.addListener(text, "cut", onCut);
event.addListener(text, "copy", onCopy);
event.addListener(text, "paste", onPaste);
// Opera has no clipboard events
if (!('oncut' in text) || !('oncopy' in text) || !('onpaste' in text)){
event.addListener(parentNode, "keydown", function(e) {
if ((useragent.isMac && !e.metaKey) || !e.ctrlKey)
return;
switch (e.keyCode) {
case 67:
onCopy(e);
break;
case 86:
onPaste(e);
break;
case 88:
onCut(e);
break;
}
});
}
// COMPOSITION
var onCompositionStart = function(e) {
if (inComposition || !host.onCompositionStart || host.$readOnly)
return;
// console.log("onCompositionStart", inComposition)
inComposition = {};
inComposition.canUndo = host.session.$undoManager;
host.onCompositionStart();
setTimeout(onCompositionUpdate, 0);
host.on("mousedown", onCompositionEnd);
if (inComposition.canUndo && !host.selection.isEmpty()) {
host.insert("");
host.session.markUndoGroup();
host.selection.clearSelection();
}
host.session.markUndoGroup();
};
var onCompositionUpdate = function() {
// console.log("onCompositionUpdate", inComposition && JSON.stringify(text.value))
if (!inComposition || !host.onCompositionUpdate || host.$readOnly)
return;
var val = text.value.replace(/\x01/g, "");
if (inComposition.lastValue === val) return;
host.onCompositionUpdate(val);
if (inComposition.lastValue)
host.undo();
if (inComposition.canUndo)
inComposition.lastValue = val;
if (inComposition.lastValue) {
var r = host.selection.getRange();
host.insert(inComposition.lastValue);
host.session.markUndoGroup();
inComposition.range = host.selection.getRange();
host.selection.setRange(r);
host.selection.clearSelection();
}
};
var onCompositionEnd = function(e) {
if (!host.onCompositionEnd || host.$readOnly) return;
// console.log("onCompositionEnd", inComposition &&inComposition.lastValue)
var c = inComposition;
inComposition = false;
var timer = setTimeout(function() {
timer = null;
var str = text.value.replace(/\x01/g, "");
// console.log(str, c.lastValue)
if (inComposition)
return;
else if (str == c.lastValue)
resetValue();
else if (!c.lastValue && str) {
resetValue();
sendText(str);
}
});
inputHandler = function compositionInputHandler(str) {
// console.log("onCompositionEnd", str, c.lastValue)
if (timer)
clearTimeout(timer);
str = str.replace(/\x01/g, "");
if (str == c.lastValue)
return "";
if (c.lastValue && timer)
host.undo();
return str;
};
host.onCompositionEnd();
host.removeListener("mousedown", onCompositionEnd);
if (e.type == "compositionend" && c.range) {
host.selection.setRange(c.range);
}
};
var syncComposition = lang.delayedCall(onCompositionUpdate, 50);
event.addListener(text, "compositionstart", onCompositionStart);
if (useragent.isGecko) {
event.addListener(text, "text", function(){syncComposition.schedule()});
} else {
event.addListener(text, "keyup", function(){syncComposition.schedule()});
event.addListener(text, "keydown", function(){syncComposition.schedule()});
}
event.addListener(text, "compositionend", onCompositionEnd);
this.getElement = function() {
return text;
};
this.setReadOnly = function(readOnly) {
text.readOnly = readOnly;
};
this.onContextMenu = function(e) {
afterContextMenu = true;
resetSelection(host.selection.isEmpty());
host._emit("nativecontextmenu", {target: host, domEvent: e});
this.moveToMouse(e, true);
};
this.moveToMouse = function(e, bringToFront) {
if (!bringToFront && useragent.isOldIE)
return;
if (!tempStyle)
tempStyle = text.style.cssText;
text.style.cssText = (bringToFront ? "z-index:100000;" : "")
+ "height:" + text.style.height + ";"
+ (useragent.isIE ? "opacity:0.1;" : "");
var rect = host.container.getBoundingClientRect();
var style = dom.computedStyle(host.container);
var top = rect.top + (parseInt(style.borderTopWidth) || 0);
var left = rect.left + (parseInt(rect.borderLeftWidth) || 0);
var maxTop = rect.bottom - top - text.clientHeight -2;
var move = function(e) {
text.style.left = e.clientX - left - 2 + "px";
text.style.top = Math.min(e.clientY - top - 2, maxTop) + "px";
};
move(e);
if (e.type != "mousedown")
return;
if (host.renderer.$keepTextAreaAtCursor)
host.renderer.$keepTextAreaAtCursor = null;
clearTimeout(closeTimeout);
// on windows context menu is opened after mouseup
if (useragent.isWin && !useragent.isOldIE)
event.capture(host.container, move, onContextMenuClose);
};
this.onContextMenuClose = onContextMenuClose;
var closeTimeout;
function onContextMenuClose() {
clearTimeout(closeTimeout);
closeTimeout = setTimeout(function () {
if (tempStyle) {
text.style.cssText = tempStyle;
tempStyle = '';
}
if (host.renderer.$keepTextAreaAtCursor == null) {
host.renderer.$keepTextAreaAtCursor = true;
host.renderer.$moveTextAreaToCursor();
}
}, useragent.isOldIE ? 200 : 0);
}
var onContextMenu = function(e) {
host.textInput.onContextMenu(e);
onContextMenuClose();
};
event.addListener(text, "mouseup", onContextMenu);
event.addListener(text, "mousedown", function(e) {
e.preventDefault();
onContextMenuClose();
});
event.addListener(host.renderer.scroller, "contextmenu", onContextMenu);
event.addListener(text, "contextmenu", onContextMenu);
};
exports.TextInput = TextInput;
});