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static/ueditor/dialogs/scrawl/scrawl.js
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/**
* Created with JetBrains PhpStorm.
* User: xuheng
* Date: 12-5-22
* Time: 上午11:38
* To change this template use File | Settings | File Templates.
*/
var scrawl = function (options) {
options && this.initOptions(options);
};
(function () {
var canvas = $G("J_brushBoard"),
context = canvas.getContext('2d'),
drawStep = [], //undo redo存储
drawStepIndex = 0; //undo redo指针
scrawl.prototype = {
isScrawl:false, //是否涂鸦
brushWidth:-1, //画笔粗细
brushColor:"", //画笔颜色
initOptions:function (options) {
var me = this;
me.originalState(options);//初始页面状态
me._buildToolbarColor(options.colorList);//动态生成颜色选择集合
me._addBoardListener(options.saveNum);//添加画板处理
me._addOPerateListener(options.saveNum);//添加undo redo clearBoard处理
me._addColorBarListener();//添加颜色选择处理
me._addBrushBarListener();//添加画笔大小处理
me._addEraserBarListener();//添加橡皮大小处理
me._addAddImgListener();//添加增添背景图片处理
me._addRemoveImgListenter();//删除背景图片处理
me._addScalePicListenter();//添加缩放处理
me._addClearSelectionListenter();//添加清楚选中状态处理
me._originalColorSelect(options.drawBrushColor);//初始化颜色选中
me._originalBrushSelect(options.drawBrushSize);//初始化画笔选中
me._clearSelection();//清楚选中状态
},
originalState:function (options) {
var me = this;
me.brushWidth = options.drawBrushSize;//同步画笔粗细
me.brushColor = options.drawBrushColor;//同步画笔颜色
context.lineWidth = me.brushWidth;//初始画笔大小
context.strokeStyle = me.brushColor;//初始画笔颜色
context.fillStyle = "transparent";//初始画布背景颜色
context.lineCap = "round";//去除锯齿
context.fill();
},
_buildToolbarColor:function (colorList) {
var tmp = null, arr = [];
arr.push("<table id='J_colorList'>");
for (var i = 0, color; color = colorList[i++];) {
if ((i - 1) % 5 == 0) {
if (i != 1) {
arr.push("</tr>");
}
arr.push("<tr>");
}
tmp = '#' + color;
arr.push("<td><a title='" + tmp + "' href='javascript:void(0)' style='background-color:" + tmp + "'></a></td>");
}
arr.push("</tr></table>");
$G("J_colorBar").innerHTML = arr.join("");
},
_addBoardListener:function (saveNum) {
var me = this,
margin = 0,
startX = -1,
startY = -1,
isMouseDown = false,
isMouseMove = false,
isMouseUp = false,
buttonPress = 0, button, flag = '';
margin = parseInt(domUtils.getComputedStyle($G("J_wrap"), "margin-left"));
drawStep.push(context.getImageData(0, 0, context.canvas.width, context.canvas.height));
drawStepIndex += 1;
domUtils.on(canvas, ["mousedown", "mousemove", "mouseup", "mouseout"], function (e) {
button = browser.webkit ? e.which : buttonPress;
switch (e.type) {
case 'mousedown':
buttonPress = 1;
flag = 1;
isMouseDown = true;
isMouseUp = false;
isMouseMove = false;
me.isScrawl = true;
startX = e.clientX - margin;//10为外边距总和
startY = e.clientY - margin;
context.beginPath();
break;
case 'mousemove' :
if (!flag && button == 0) {
return;
}
if (!flag && button) {
startX = e.clientX - margin;//10为外边距总和
startY = e.clientY - margin;
context.beginPath();
flag = 1;
}
if (isMouseUp || !isMouseDown) {
return;
}
var endX = e.clientX - margin,
endY = e.clientY - margin;
context.moveTo(startX, startY);
context.lineTo(endX, endY);
context.stroke();
startX = endX;
startY = endY;
isMouseMove = true;
break;
case 'mouseup':
buttonPress = 0;
if (!isMouseDown)return;
if (!isMouseMove) {
context.arc(startX, startY, context.lineWidth, 0, Math.PI * 2, false);
context.fillStyle = context.strokeStyle;
context.fill();
}
context.closePath();
me._saveOPerate(saveNum);
isMouseDown = false;
isMouseMove = false;
isMouseUp = true;
startX = -1;
startY = -1;
break;
case 'mouseout':
flag = '';
buttonPress = 0;
if (button == 1) return;
context.closePath();
break;
}
});
},
_addOPerateListener:function (saveNum) {
var me = this;
domUtils.on($G("J_previousStep"), "click", function () {
if (drawStepIndex > 1) {
drawStepIndex -= 1;
context.clearRect(0, 0, context.canvas.width, context.canvas.height);
context.putImageData(drawStep[drawStepIndex - 1], 0, 0);
me.btn2Highlight("J_nextStep");
drawStepIndex == 1 && me.btn2disable("J_previousStep");
}
});
domUtils.on($G("J_nextStep"), "click", function () {
if (drawStepIndex > 0 && drawStepIndex < drawStep.length) {
context.clearRect(0, 0, context.canvas.width, context.canvas.height);
context.putImageData(drawStep[drawStepIndex], 0, 0);
drawStepIndex += 1;
me.btn2Highlight("J_previousStep");
drawStepIndex == drawStep.length && me.btn2disable("J_nextStep");
}
});
domUtils.on($G("J_clearBoard"), "click", function () {
context.clearRect(0, 0, context.canvas.width, context.canvas.height);
drawStep = [];
me._saveOPerate(saveNum);
drawStepIndex = 1;
me.isScrawl = false;
me.btn2disable("J_previousStep");
me.btn2disable("J_nextStep");
me.btn2disable("J_clearBoard");
});
},
_addColorBarListener:function () {
var me = this;
domUtils.on($G("J_colorBar"), "click", function (e) {
var target = me.getTarget(e),
color = target.title;
if (!!color) {
me._addColorSelect(target);
me.brushColor = color;
context.globalCompositeOperation = "source-over";
context.lineWidth = me.brushWidth;
context.strokeStyle = color;
}
});
},
_addBrushBarListener:function () {
var me = this;
domUtils.on($G("J_brushBar"), "click", function (e) {
var target = me.getTarget(e),
size = browser.ie ? target.innerText : target.text;
if (!!size) {
me._addBESelect(target);
context.globalCompositeOperation = "source-over";
context.lineWidth = parseInt(size);
context.strokeStyle = me.brushColor;
me.brushWidth = context.lineWidth;
}
});
},
_addEraserBarListener:function () {
var me = this;
domUtils.on($G("J_eraserBar"), "click", function (e) {
var target = me.getTarget(e),
size = browser.ie ? target.innerText : target.text;
if (!!size) {
me._addBESelect(target);
context.lineWidth = parseInt(size);
context.globalCompositeOperation = "destination-out";
context.strokeStyle = "#FFF";
}
});
},
_addAddImgListener:function () {
var file = $G("J_imgTxt");
if (!window.FileReader) {
$G("J_addImg").style.display = 'none';
$G("J_removeImg").style.display = 'none';
$G("J_sacleBoard").style.display = 'none';
}
domUtils.on(file, "change", function (e) {
var frm = file.parentNode;
addMaskLayer(lang.backgroundUploading);
var target = e.target || e.srcElement,
reader = new FileReader();
reader.onload = function(evt){
var target = evt.target || evt.srcElement;
ue_callback(target.result, 'SUCCESS');
};
reader.readAsDataURL(target.files[0]);
frm.reset();
});
},
_addRemoveImgListenter:function () {
var me = this;
domUtils.on($G("J_removeImg"), "click", function () {
$G("J_picBoard").innerHTML = "";
me.btn2disable("J_removeImg");
me.btn2disable("J_sacleBoard");
});
},
_addScalePicListenter:function () {
domUtils.on($G("J_sacleBoard"), "click", function () {
var picBoard = $G("J_picBoard"),
scaleCon = $G("J_scaleCon"),
img = picBoard.children[0];
if (img) {
if (!scaleCon) {
picBoard.style.cssText = "position:relative;z-index:999;"+picBoard.style.cssText;
img.style.cssText = "position: absolute;top:" + (canvas.height - img.height) / 2 + "px;left:" + (canvas.width - img.width) / 2 + "px;";
var scale = new ScaleBoy();
picBoard.appendChild(scale.init());
scale.startScale(img);
} else {
if (scaleCon.style.visibility == "visible") {
scaleCon.style.visibility = "hidden";
picBoard.style.position = "";
picBoard.style.zIndex = "";
} else {
scaleCon.style.visibility = "visible";
picBoard.style.cssText += "position:relative;z-index:999";
}
}
}
});
},
_addClearSelectionListenter:function () {
var doc = document;
domUtils.on(doc, 'mousemove', function (e) {
if (browser.ie && browser.version < 11)
doc.selection.clear();
else
window.getSelection().removeAllRanges();
});
},
_clearSelection:function () {
var list = ["J_operateBar", "J_colorBar", "J_brushBar", "J_eraserBar", "J_picBoard"];
for (var i = 0, group; group = list[i++];) {
domUtils.unSelectable($G(group));
}
},
_saveOPerate:function (saveNum) {
var me = this;
if (drawStep.length <= saveNum) {
if(drawStepIndex<drawStep.length){
me.btn2disable("J_nextStep");
drawStep.splice(drawStepIndex);
}
drawStep.push(context.getImageData(0, 0, context.canvas.width, context.canvas.height));
drawStepIndex = drawStep.length;
} else {
drawStep.shift();
drawStep.push(context.getImageData(0, 0, context.canvas.width, context.canvas.height));
drawStepIndex = drawStep.length;
}
me.btn2Highlight("J_previousStep");
me.btn2Highlight("J_clearBoard");
},
_originalColorSelect:function (title) {
var colorList = $G("J_colorList").getElementsByTagName("td");
for (var j = 0, cell; cell = colorList[j++];) {
if (cell.children[0].title.toLowerCase() == title) {
cell.children[0].style.opacity = 1;
}
}
},
_originalBrushSelect:function (text) {
var brushList = $G("J_brushBar").children;
for (var i = 0, ele; ele = brushList[i++];) {
if (ele.tagName.toLowerCase() == "a") {
var size = browser.ie ? ele.innerText : ele.text;
if (size.toLowerCase() == text) {
ele.style.opacity = 1;
}
}
}
},
_addColorSelect:function (target) {
var me = this,
colorList = $G("J_colorList").getElementsByTagName("td"),
eraserList = $G("J_eraserBar").children,
brushList = $G("J_brushBar").children;
for (var i = 0, cell; cell = colorList[i++];) {
cell.children[0].style.opacity = 0.3;
}
for (var k = 0, ele; ele = brushList[k++];) {
if (ele.tagName.toLowerCase() == "a") {
ele.style.opacity = 0.3;
var size = browser.ie ? ele.innerText : ele.text;
if (size.toLowerCase() == this.brushWidth) {
ele.style.opacity = 1;
}
}
}
for (var j = 0, node; node = eraserList[j++];) {
if (node.tagName.toLowerCase() == "a") {
node.style.opacity = 0.3;
}
}
target.style.opacity = 1;
target.blur();
},
_addBESelect:function (target) {
var brushList = $G("J_brushBar").children;
var eraserList = $G("J_eraserBar").children;
for (var i = 0, ele; ele = brushList[i++];) {
if (ele.tagName.toLowerCase() == "a") {
ele.style.opacity = 0.3;
}
}
for (var j = 0, node; node = eraserList[j++];) {
if (node.tagName.toLowerCase() == "a") {
node.style.opacity = 0.3;
}
}
target.style.opacity = 1;
target.blur();
},
getCanvasData:function () {
var picContainer = $G("J_picBoard"),
img = picContainer.children[0];
if (img) {
var x, y;
if (img.style.position == "absolute") {
x = parseInt(img.style.left);
y = parseInt(img.style.top);
} else {
x = (picContainer.offsetWidth - img.width) / 2;
y = (picContainer.offsetHeight - img.height) / 2;
}
context.globalCompositeOperation = "destination-over";
context.drawImage(img, x, y, img.width, img.height);
} else {
context.globalCompositeOperation = "destination-atop";
context.fillStyle = "#fff";//重置画布背景白色
context.fillRect(0, 0, canvas.width, canvas.height);
}
try {
return canvas.toDataURL("image/png").substring(22);
} catch (e) {
return "";
}
},
btn2Highlight:function (id) {
var cur = $G(id);
cur.className.indexOf("H") == -1 && (cur.className += "H");
},
btn2disable:function (id) {
var cur = $G(id);
cur.className.indexOf("H") != -1 && (cur.className = cur.className.replace("H", ""));
},
getTarget:function (evt) {
return evt.target || evt.srcElement;
}
};
})();
var ScaleBoy = function () {
this.dom = null;
this.scalingElement = null;
};
(function () {
function _appendStyle() {
var doc = document,
head = doc.getElementsByTagName('head')[0],
style = doc.createElement('style'),
cssText = '.scale{visibility:hidden;cursor:move;position:absolute;left:0;top:0;width:100px;height:50px;background-color:#fff;font-size:0;line-height:0;opacity:.4;filter:Alpha(opacity=40);}'
+ '.scale span{position:absolute;left:0;top:0;width:6px;height:6px;background-color:#006DAE;}'
+ '.scale .hand0, .scale .hand7{cursor:nw-resize;}'
+ '.scale .hand1, .scale .hand6{left:50%;margin-left:-3px;cursor:n-resize;}'
+ '.scale .hand2, .scale .hand4, .scale .hand7{left:100%;margin-left:-6px;}'
+ '.scale .hand3, .scale .hand4{top:50%;margin-top:-3px;cursor:w-resize;}'
+ '.scale .hand5, .scale .hand6, .scale .hand7{margin-top:-6px;top:100%;}'
+ '.scale .hand2, .scale .hand5{cursor:ne-resize;}';
style.type = 'text/css';
try {
style.appendChild(doc.createTextNode(cssText));
} catch (e) {
style.styleSheet.cssText = cssText;
}
head.appendChild(style);
}
function _getDom() {
var doc = document,
hand,
arr = [],
scale = doc.createElement('div');
scale.id = 'J_scaleCon';
scale.className = 'scale';
for (var i = 0; i < 8; i++) {
arr.push("<span class='hand" + i + "'></span>");
}
scale.innerHTML = arr.join("");
return scale;
}
var rect = [
//[left, top, width, height]
[1, 1, -1, -1],
[0, 1, 0, -1],
[0, 1, 1, -1],
[1, 0, -1, 0],
[0, 0, 1, 0],
[1, 0, -1, 1],
[0, 0, 0, 1],
[0, 0, 1, 1]
];
ScaleBoy.prototype = {
init:function () {
_appendStyle();
var me = this,
scale = me.dom = _getDom();
me.scaleMousemove.fp = me;
domUtils.on(scale, 'mousedown', function (e) {
var target = e.target || e.srcElement;
me.start = {x:e.clientX, y:e.clientY};
if (target.className.indexOf('hand') != -1) {
me.dir = target.className.replace('hand', '');
}
domUtils.on(document.body, 'mousemove', me.scaleMousemove);
e.stopPropagation ? e.stopPropagation() : e.cancelBubble = true;
});
domUtils.on(document.body, 'mouseup', function (e) {
if (me.start) {
domUtils.un(document.body, 'mousemove', me.scaleMousemove);
if (me.moved) {
me.updateScaledElement({position:{x:scale.style.left, y:scale.style.top}, size:{w:scale.style.width, h:scale.style.height}});
}
delete me.start;
delete me.moved;
delete me.dir;
}
});
return scale;
},
startScale:function (objElement) {
var me = this, Idom = me.dom;
Idom.style.cssText = 'visibility:visible;top:' + objElement.style.top + ';left:' + objElement.style.left + ';width:' + objElement.offsetWidth + 'px;height:' + objElement.offsetHeight + 'px;';
me.scalingElement = objElement;
},
updateScaledElement:function (objStyle) {
var cur = this.scalingElement,
pos = objStyle.position,
size = objStyle.size;
if (pos) {
typeof pos.x != 'undefined' && (cur.style.left = pos.x);
typeof pos.y != 'undefined' && (cur.style.top = pos.y);
}
if (size) {
size.w && (cur.style.width = size.w);
size.h && (cur.style.height = size.h);
}
},
updateStyleByDir:function (dir, offset) {
var me = this,
dom = me.dom, tmp;
rect['def'] = [1, 1, 0, 0];
if (rect[dir][0] != 0) {
tmp = parseInt(dom.style.left) + offset.x;
dom.style.left = me._validScaledProp('left', tmp) + 'px';
}
if (rect[dir][1] != 0) {
tmp = parseInt(dom.style.top) + offset.y;
dom.style.top = me._validScaledProp('top', tmp) + 'px';
}
if (rect[dir][2] != 0) {
tmp = dom.clientWidth + rect[dir][2] * offset.x;
dom.style.width = me._validScaledProp('width', tmp) + 'px';
}
if (rect[dir][3] != 0) {
tmp = dom.clientHeight + rect[dir][3] * offset.y;
dom.style.height = me._validScaledProp('height', tmp) + 'px';
}
if (dir === 'def') {
me.updateScaledElement({position:{x:dom.style.left, y:dom.style.top}});
}
},
scaleMousemove:function (e) {
var me = arguments.callee.fp,
start = me.start,
dir = me.dir || 'def',
offset = {x:e.clientX - start.x, y:e.clientY - start.y};
me.updateStyleByDir(dir, offset);
arguments.callee.fp.start = {x:e.clientX, y:e.clientY};
arguments.callee.fp.moved = 1;
},
_validScaledProp:function (prop, value) {
var ele = this.dom,
wrap = $G("J_picBoard");
value = isNaN(value) ? 0 : value;
switch (prop) {
case 'left':
return value < 0 ? 0 : (value + ele.clientWidth) > wrap.clientWidth ? wrap.clientWidth - ele.clientWidth : value;
case 'top':
return value < 0 ? 0 : (value + ele.clientHeight) > wrap.clientHeight ? wrap.clientHeight - ele.clientHeight : value;
case 'width':
return value <= 0 ? 1 : (value + ele.offsetLeft) > wrap.clientWidth ? wrap.clientWidth - ele.offsetLeft : value;
case 'height':
return value <= 0 ? 1 : (value + ele.offsetTop) > wrap.clientHeight ? wrap.clientHeight - ele.offsetTop : value;
}
}
};
})();
//后台回调
function ue_callback(url, state) {
var doc = document,
picBorard = $G("J_picBoard"),
img = doc.createElement("img");
//图片缩放
function scale(img, max, oWidth, oHeight) {
var width = 0, height = 0, percent, ow = img.width || oWidth, oh = img.height || oHeight;
if (ow > max || oh > max) {
if (ow >= oh) {
if (width = ow - max) {
percent = (width / ow).toFixed(2);
img.height = oh - oh * percent;
img.width = max;
}
} else {
if (height = oh - max) {
percent = (height / oh).toFixed(2);
img.width = ow - ow * percent;
img.height = max;
}
}
}
}
//移除遮罩层
removeMaskLayer();
//状态响应
if (state == "SUCCESS") {
picBorard.innerHTML = "";
img.onload = function () {
scale(this, 300);
picBorard.appendChild(img);
var obj = new scrawl();
obj.btn2Highlight("J_removeImg");
//trace 2457
obj.btn2Highlight("J_sacleBoard");
};
img.src = url;
} else {
alert(state);
}
}
//去掉遮罩层
function removeMaskLayer() {
var maskLayer = $G("J_maskLayer");
maskLayer.className = "maskLayerNull";
maskLayer.innerHTML = "";
dialog.buttons[0].setDisabled(false);
}
//添加遮罩层
function addMaskLayer(html) {
var maskLayer = $G("J_maskLayer");
dialog.buttons[0].setDisabled(true);
maskLayer.className = "maskLayer";
maskLayer.innerHTML = html;
}
//执行确认按钮方法
function exec(scrawlObj) {
if (scrawlObj.isScrawl) {
addMaskLayer(lang.scrawlUpLoading);
var base64 = scrawlObj.getCanvasData();
if (!!base64) {
var options = {
timeout:100000,
onsuccess:function (xhr) {
if (!scrawlObj.isCancelScrawl) {
var responseObj;
responseObj = eval("(" + xhr.responseText + ")");
if (responseObj.state == "SUCCESS") {
var imgObj = {},
url = editor.options.scrawlUrlPrefix + responseObj.url;
imgObj.src = url;
imgObj._src = url;
imgObj.alt = responseObj.original || '';
imgObj.title = responseObj.title || '';
editor.execCommand("insertImage", imgObj);
dialog.close();
} else {
alert(responseObj.state);
}
}
},
onerror:function () {
alert(lang.imageError);
dialog.close();
}
};
options[editor.getOpt('scrawlFieldName')] = base64;
var actionUrl = editor.getActionUrl(editor.getOpt('scrawlActionName')),
params = utils.serializeParam(editor.queryCommandValue('serverparam')) || '',
url = utils.formatUrl(actionUrl + (actionUrl.indexOf('?') == -1 ? '?':'&') + params);
ajax.request(url, options);
}
} else {
addMaskLayer(lang.noScarwl + " <input type='button' value='" + lang.continueBtn + "' onclick='removeMaskLayer()'/>");
}
}
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