Get caret position or offset from inputor
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.cn-greasyfork.org/scripts/16936/138639/ichord-Caretjs.js
/*! jquery.caret v0.3.1 2016-02-27 */
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define(["jquery"], function ($) {
return (root.returnExportsGlobal = factory($));
});
} else if (typeof exports === 'object') {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like enviroments that support module.exports,
// like Node.
module.exports = factory(require("jquery"));
} else {
factory(jQuery);
}
}(this, function ($) {
/*
Implement Github like autocomplete mentions
http://ichord.github.com/At.js
Copyright (c) 2013 [email protected]
Licensed under the MIT license.
*/
/*
本插件操作 textarea 或者 input 内的插入符
只实现了获得插入符在文本框中的位置，我设置
插入符的位置.
*/
"use strict";
var EditableCaret, InputCaret, Mirror, Utils, discoveryIframeOf, methods, oDocument, oFrame, oWindow, pluginName, setContextBy;
pluginName = 'caret';
EditableCaret = (function() {
function EditableCaret($inputor) {
this.$inputor = $inputor;
this.domInputor = this.$inputor[0];
}
EditableCaret.prototype.setPos = function(pos) {
var fn, found, offset, sel;
if (sel = oWindow.getSelection()) {
offset = 0;
found = false;
(fn = function(pos, parent) {
var node, range, _i, _len, _ref, _results;
_ref = parent.childNodes;
_results = [];
for (_i = 0, _len = _ref.length; _i < _len; _i++) {
node = _ref[_i];
if (found) {
break;
}
if (node.nodeType === 3) {
if (offset + node.length >= pos) {
found = true;
range = oDocument.createRange();
range.setStart(node, pos - offset);
sel.removeAllRanges();
sel.addRange(range);
break;
} else {
_results.push(offset += node.length);
}
} else {
_results.push(fn(pos, node));
}
}
return _results;
})(pos, this.domInputor);
}
return this.domInputor;
};
EditableCaret.prototype.getIEPosition = function() {
return this.getPosition();
};
EditableCaret.prototype.getPosition = function() {
var inputor_offset, offset;
offset = this.getOffset();
inputor_offset = this.$inputor.offset();
offset.left -= inputor_offset.left;
offset.top -= inputor_offset.top;
return offset;
};
EditableCaret.prototype.getOldIEPos = function() {
var preCaretTextRange, textRange;
textRange = oDocument.selection.createRange();
preCaretTextRange = oDocument.body.createTextRange();
preCaretTextRange.moveToElementText(this.domInputor);
preCaretTextRange.setEndPoint("EndToEnd", textRange);
return preCaretTextRange.text.length;
};
EditableCaret.prototype.getPos = function() {
var clonedRange, pos, range;
if (range = this.range()) {
clonedRange = range.cloneRange();
clonedRange.selectNodeContents(this.domInputor);
clonedRange.setEnd(range.endContainer, range.endOffset);
pos = clonedRange.toString().length;
clonedRange.detach();
return pos;
} else if (oDocument.selection) {
return this.getOldIEPos();
}
};
EditableCaret.prototype.getOldIEOffset = function() {
var range, rect;
range = oDocument.selection.createRange().duplicate();
range.moveStart("character", -1);
rect = range.getBoundingClientRect();
return {
height: rect.bottom - rect.top,
left: rect.left,
top: rect.top
};
};
EditableCaret.prototype.getOffset = function(pos) {
var clonedRange, offset, range, rect, shadowCaret;
if (oWindow.getSelection && (range = this.range())) {
if (range.endOffset - 1 > 0 && range.endContainer !== this.domInputor) {
clonedRange = range.cloneRange();
clonedRange.setStart(range.endContainer, range.endOffset - 1);
clonedRange.setEnd(range.endContainer, range.endOffset);
rect = clonedRange.getBoundingClientRect();
offset = {
height: rect.height,
left: rect.left + rect.width,
top: rect.top
};
clonedRange.detach();
}
if (!offset || (offset != null ? offset.height : void 0) === 0) {
clonedRange = range.cloneRange();
shadowCaret = $(oDocument.createTextNode("|"));
clonedRange.insertNode(shadowCaret[0]);
clonedRange.selectNode(shadowCaret[0]);
rect = clonedRange.getBoundingClientRect();
offset = {
height: rect.height,
left: rect.left,
top: rect.top
};
shadowCaret.remove();
clonedRange.detach();
}
} else if (oDocument.selection) {
offset = this.getOldIEOffset();
}
if (offset) {
offset.top += $(oWindow).scrollTop();
offset.left += $(oWindow).scrollLeft();
}
return offset;
};
EditableCaret.prototype.range = function() {
var sel;
if (!oWindow.getSelection) {
return;
}
sel = oWindow.getSelection();
if (sel.rangeCount > 0) {
return sel.getRangeAt(0);
} else {
return null;
}
};
return EditableCaret;
})();
InputCaret = (function() {
function InputCaret($inputor) {
this.$inputor = $inputor;
this.domInputor = this.$inputor[0];
}
InputCaret.prototype.getIEPos = function() {
var endRange, inputor, len, normalizedValue, pos, range, textInputRange;
inputor = this.domInputor;
range = oDocument.selection.createRange();
pos = 0;
if (range && range.parentElement() === inputor) {
normalizedValue = inputor.value.replace(/\r\n/g, "\n");
len = normalizedValue.length;
textInputRange = inputor.createTextRange();
textInputRange.moveToBookmark(range.getBookmark());
endRange = inputor.createTextRange();
endRange.collapse(false);
if (textInputRange.compareEndPoints("StartToEnd", endRange) > -1) {
pos = len;
} else {
pos = -textInputRange.moveStart("character", -len);
}
}
return pos;
};
InputCaret.prototype.getPos = function() {
if (oDocument.selection) {
return this.getIEPos();
} else {
return this.domInputor.selectionStart;
}
};
InputCaret.prototype.setPos = function(pos) {
var inputor, range;
inputor = this.domInputor;
if (oDocument.selection) {
range = inputor.createTextRange();
range.move("character", pos);
range.select();
} else if (inputor.setSelectionRange) {
inputor.setSelectionRange(pos, pos);
}
return inputor;
};
InputCaret.prototype.getIEOffset = function(pos) {
var h, textRange, x, y;
textRange = this.domInputor.createTextRange();
pos || (pos = this.getPos());
textRange.move('character', pos);
x = textRange.boundingLeft;
y = textRange.boundingTop;
h = textRange.boundingHeight;
return {
left: x,
top: y,
height: h
};
};
InputCaret.prototype.getOffset = function(pos) {
var $inputor, offset, position;
$inputor = this.$inputor;
if (oDocument.selection) {
offset = this.getIEOffset(pos);
offset.top += $(oWindow).scrollTop() + $inputor.scrollTop();
offset.left += $(oWindow).scrollLeft() + $inputor.scrollLeft();
return offset;
} else {
offset = $inputor.offset();
position = this.getPosition(pos);
return offset = {
left: offset.left + position.left - $inputor.scrollLeft(),
top: offset.top + position.top - $inputor.scrollTop(),
height: position.height
};
}
};
InputCaret.prototype.getPosition = function(pos) {
var $inputor, at_rect, end_range, format, html, mirror, start_range;
$inputor = this.$inputor;
format = function(value) {
value = value.replace(/<|>|`|"|&/g, '?').replace(/\r\n|\r|\n/g, "<br/>");
if (/firefox/i.test(navigator.userAgent)) {
value = value.replace(/\s/g, ' ');
}
return value;
};
if (pos === void 0) {
pos = this.getPos();
}
start_range = $inputor.val().slice(0, pos);
end_range = $inputor.val().slice(pos);
html = "<span style='position: relative; display: inline;'>" + format(start_range) + "</span>";
html += "<span id='caret' style='position: relative; display: inline;'>|</span>";
html += "<span style='position: relative; display: inline;'>" + format(end_range) + "</span>";
mirror = new Mirror($inputor);
return at_rect = mirror.create(html).rect();
};
InputCaret.prototype.getIEPosition = function(pos) {
var h, inputorOffset, offset, x, y;
offset = this.getIEOffset(pos);
inputorOffset = this.$inputor.offset();
x = offset.left - inputorOffset.left;
y = offset.top - inputorOffset.top;
h = offset.height;
return {
left: x,
top: y,
height: h
};
};
return InputCaret;
})();
Mirror = (function() {
Mirror.prototype.css_attr = ["borderBottomWidth", "borderLeftWidth", "borderRightWidth", "borderTopStyle", "borderRightStyle", "borderBottomStyle", "borderLeftStyle", "borderTopWidth", "boxSizing", "fontFamily", "fontSize", "fontWeight", "height", "letterSpacing", "lineHeight", "marginBottom", "marginLeft", "marginRight", "marginTop", "outlineWidth", "overflow", "overflowX", "overflowY", "paddingBottom", "paddingLeft", "paddingRight", "paddingTop", "textAlign", "textOverflow", "textTransform", "whiteSpace", "wordBreak", "wordWrap"];
function Mirror($inputor) {
this.$inputor = $inputor;
}
Mirror.prototype.mirrorCss = function() {
var css,
_this = this;
css = {
position: 'absolute',
left: -9999,
top: 0,
zIndex: -20000
};
if (this.$inputor.prop('tagName') === 'TEXTAREA') {
this.css_attr.push('width');
}
$.each(this.css_attr, function(i, p) {
return css[p] = _this.$inputor.css(p);
});
return css;
};
Mirror.prototype.create = function(html) {
this.$mirror = $('<div></div>');
this.$mirror.css(this.mirrorCss());
this.$mirror.html(html);
this.$inputor.after(this.$mirror);
return this;
};
Mirror.prototype.rect = function() {
var $flag, pos, rect;
$flag = this.$mirror.find("#caret");
pos = $flag.position();
rect = {
left: pos.left,
top: pos.top,
height: $flag.height()
};
this.$mirror.remove();
return rect;
};
return Mirror;
})();
Utils = {
contentEditable: function($inputor) {
return !!($inputor[0].contentEditable && $inputor[0].contentEditable === 'true');
}
};
methods = {
pos: function(pos) {
if (pos || pos === 0) {
return this.setPos(pos);
} else {
return this.getPos();
}
},
position: function(pos) {
if (oDocument.selection) {
return this.getIEPosition(pos);
} else {
return this.getPosition(pos);
}
},
offset: function(pos) {
var offset;
offset = this.getOffset(pos);
return offset;
}
};
oDocument = null;
oWindow = null;
oFrame = null;
setContextBy = function(settings) {
var iframe;
if (iframe = settings != null ? settings.iframe : void 0) {
oFrame = iframe;
oWindow = iframe.contentWindow;
return oDocument = iframe.contentDocument || oWindow.document;
} else {
oFrame = void 0;
oWindow = window;
return oDocument = document;
}
};
discoveryIframeOf = function($dom) {
var error;
oDocument = $dom[0].ownerDocument;
oWindow = oDocument.defaultView || oDocument.parentWindow;
try {
return oFrame = oWindow.frameElement;
} catch (_error) {
error = _error;
}
};
$.fn.caret = function(method, value, settings) {
var caret;
if (methods[method]) {
if ($.isPlainObject(value)) {
setContextBy(value);
value = void 0;
} else {
setContextBy(settings);
}
caret = Utils.contentEditable(this) ? new EditableCaret(this) : new InputCaret(this);
return methods[method].apply(caret, [value]);
} else {
return $.error("Method " + method + " does not exist on jQuery.caret");
}
};
$.fn.caret.EditableCaret = EditableCaret;
$.fn.caret.InputCaret = InputCaret;
$.fn.caret.Utils = Utils;
$.fn.caret.apis = methods;
}));