672 lines
26 KiB
JavaScript
672 lines
26 KiB
JavaScript
/**
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* Created with JetBrains PhpStorm.
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* User: xuheng
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* Date: 12-5-22
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* Time: 上午11:38
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* To change this template use File | Settings | File Templates.
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*/
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var scrawl = function (options) {
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options && this.initOptions(options);
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};
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(function () {
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var canvas = $G("J_brushBoard"),
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context = canvas.getContext('2d'),
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drawStep = [], //undo redo存储
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drawStepIndex = 0; //undo redo指针
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scrawl.prototype = {
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isScrawl:false, //是否涂鸦
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brushWidth:-1, //画笔粗细
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brushColor:"", //画笔颜色
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initOptions:function (options) {
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var me = this;
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me.originalState(options);//初始页面状态
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me._buildToolbarColor(options.colorList);//动态生成颜色选择集合
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me._addBoardListener(options.saveNum);//添加画板处理
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me._addOPerateListener(options.saveNum);//添加undo redo clearBoard处理
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me._addColorBarListener();//添加颜色选择处理
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me._addBrushBarListener();//添加画笔大小处理
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me._addEraserBarListener();//添加橡皮大小处理
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me._addAddImgListener();//添加增添背景图片处理
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me._addRemoveImgListenter();//删除背景图片处理
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me._addScalePicListenter();//添加缩放处理
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me._addClearSelectionListenter();//添加清楚选中状态处理
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me._originalColorSelect(options.drawBrushColor);//初始化颜色选中
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me._originalBrushSelect(options.drawBrushSize);//初始化画笔选中
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me._clearSelection();//清楚选中状态
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},
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originalState:function (options) {
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var me = this;
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me.brushWidth = options.drawBrushSize;//同步画笔粗细
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me.brushColor = options.drawBrushColor;//同步画笔颜色
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context.lineWidth = me.brushWidth;//初始画笔大小
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context.strokeStyle = me.brushColor;//初始画笔颜色
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context.fillStyle = "transparent";//初始画布背景颜色
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context.lineCap = "round";//去除锯齿
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context.fill();
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},
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_buildToolbarColor:function (colorList) {
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var tmp = null, arr = [];
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arr.push("<table id='J_colorList'>");
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for (var i = 0, color; color = colorList[i++];) {
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if ((i - 1) % 5 == 0) {
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if (i != 1) {
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arr.push("</tr>");
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}
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arr.push("<tr>");
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}
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tmp = '#' + color;
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arr.push("<td><a title='" + tmp + "' href='javascript:void(0)' style='background-color:" + tmp + "'></a></td>");
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}
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arr.push("</tr></table>");
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$G("J_colorBar").innerHTML = arr.join("");
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},
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_addBoardListener:function (saveNum) {
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var me = this,
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margin = 0,
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startX = -1,
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startY = -1,
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isMouseDown = false,
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isMouseMove = false,
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isMouseUp = false,
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buttonPress = 0, button, flag = '';
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margin = parseInt(domUtils.getComputedStyle($G("J_wrap"), "margin-left"));
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drawStep.push(context.getImageData(0, 0, context.canvas.width, context.canvas.height));
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drawStepIndex += 1;
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domUtils.on(canvas, ["mousedown", "mousemove", "mouseup", "mouseout"], function (e) {
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button = browser.webkit ? e.which : buttonPress;
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switch (e.type) {
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case 'mousedown':
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buttonPress = 1;
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flag = 1;
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isMouseDown = true;
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isMouseUp = false;
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isMouseMove = false;
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me.isScrawl = true;
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startX = e.clientX - margin;//10为外边距总和
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startY = e.clientY - margin;
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context.beginPath();
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break;
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case 'mousemove' :
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if (!flag && button == 0) {
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return;
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}
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if (!flag && button) {
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startX = e.clientX - margin;//10为外边距总和
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startY = e.clientY - margin;
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context.beginPath();
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flag = 1;
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}
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if (isMouseUp || !isMouseDown) {
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return;
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}
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var endX = e.clientX - margin,
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endY = e.clientY - margin;
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context.moveTo(startX, startY);
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context.lineTo(endX, endY);
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context.stroke();
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startX = endX;
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startY = endY;
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isMouseMove = true;
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break;
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case 'mouseup':
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buttonPress = 0;
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if (!isMouseDown)return;
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if (!isMouseMove) {
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context.arc(startX, startY, context.lineWidth, 0, Math.PI * 2, false);
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context.fillStyle = context.strokeStyle;
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context.fill();
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}
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context.closePath();
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me._saveOPerate(saveNum);
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isMouseDown = false;
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isMouseMove = false;
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isMouseUp = true;
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startX = -1;
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startY = -1;
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break;
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case 'mouseout':
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flag = '';
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buttonPress = 0;
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if (button == 1) return;
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context.closePath();
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break;
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}
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});
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},
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_addOPerateListener:function (saveNum) {
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var me = this;
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domUtils.on($G("J_previousStep"), "click", function () {
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if (drawStepIndex > 1) {
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drawStepIndex -= 1;
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context.clearRect(0, 0, context.canvas.width, context.canvas.height);
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context.putImageData(drawStep[drawStepIndex - 1], 0, 0);
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me.btn2Highlight("J_nextStep");
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drawStepIndex == 1 && me.btn2disable("J_previousStep");
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}
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});
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domUtils.on($G("J_nextStep"), "click", function () {
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if (drawStepIndex > 0 && drawStepIndex < drawStep.length) {
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context.clearRect(0, 0, context.canvas.width, context.canvas.height);
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context.putImageData(drawStep[drawStepIndex], 0, 0);
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drawStepIndex += 1;
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me.btn2Highlight("J_previousStep");
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drawStepIndex == drawStep.length && me.btn2disable("J_nextStep");
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}
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});
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domUtils.on($G("J_clearBoard"), "click", function () {
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context.clearRect(0, 0, context.canvas.width, context.canvas.height);
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drawStep = [];
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me._saveOPerate(saveNum);
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drawStepIndex = 1;
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me.isScrawl = false;
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me.btn2disable("J_previousStep");
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me.btn2disable("J_nextStep");
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me.btn2disable("J_clearBoard");
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});
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},
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_addColorBarListener:function () {
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var me = this;
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domUtils.on($G("J_colorBar"), "click", function (e) {
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var target = me.getTarget(e),
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color = target.title;
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if (!!color) {
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me._addColorSelect(target);
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me.brushColor = color;
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context.globalCompositeOperation = "source-over";
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context.lineWidth = me.brushWidth;
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context.strokeStyle = color;
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}
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});
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},
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_addBrushBarListener:function () {
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var me = this;
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domUtils.on($G("J_brushBar"), "click", function (e) {
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var target = me.getTarget(e),
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size = browser.ie ? target.innerText : target.text;
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if (!!size) {
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me._addBESelect(target);
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context.globalCompositeOperation = "source-over";
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context.lineWidth = parseInt(size);
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context.strokeStyle = me.brushColor;
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me.brushWidth = context.lineWidth;
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}
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});
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},
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_addEraserBarListener:function () {
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var me = this;
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domUtils.on($G("J_eraserBar"), "click", function (e) {
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var target = me.getTarget(e),
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size = browser.ie ? target.innerText : target.text;
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if (!!size) {
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me._addBESelect(target);
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context.lineWidth = parseInt(size);
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context.globalCompositeOperation = "destination-out";
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context.strokeStyle = "#FFF";
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}
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});
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},
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_addAddImgListener:function () {
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var file = $G("J_imgTxt");
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if (!window.FileReader) {
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$G("J_addImg").style.display = 'none';
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$G("J_removeImg").style.display = 'none';
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$G("J_sacleBoard").style.display = 'none';
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}
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domUtils.on(file, "change", function (e) {
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var frm = file.parentNode;
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addMaskLayer(lang.backgroundUploading);
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var target = e.target || e.srcElement,
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reader = new FileReader();
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reader.onload = function(evt){
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var target = evt.target || evt.srcElement;
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ue_callback(target.result, 'SUCCESS');
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};
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reader.readAsDataURL(target.files[0]);
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frm.reset();
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});
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},
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_addRemoveImgListenter:function () {
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var me = this;
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domUtils.on($G("J_removeImg"), "click", function () {
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$G("J_picBoard").innerHTML = "";
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me.btn2disable("J_removeImg");
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me.btn2disable("J_sacleBoard");
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});
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},
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_addScalePicListenter:function () {
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domUtils.on($G("J_sacleBoard"), "click", function () {
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var picBoard = $G("J_picBoard"),
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scaleCon = $G("J_scaleCon"),
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img = picBoard.children[0];
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if (img) {
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if (!scaleCon) {
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picBoard.style.cssText = "position:relative;z-index:1;"+picBoard.style.cssText;
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img.style.cssText = "position: absolute;top:" + (canvas.height - img.height) / 2 + "px;left:" + (canvas.width - img.width) / 2 + "px;";
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var scale = new ScaleBoy();
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picBoard.appendChild(scale.init());
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scale.startScale(img);
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} else {
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if (scaleCon.style.visibility == "visible") {
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scaleCon.style.visibility = "hidden";
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picBoard.style.position = "";
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picBoard.style.zIndex = "";
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} else {
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scaleCon.style.visibility = "visible";
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picBoard.style.cssText += "position:relative;z-index:1";
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}
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}
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}
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});
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},
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_addClearSelectionListenter:function () {
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var doc = document;
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domUtils.on(doc, 'mousemove', function (e) {
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if (browser.ie && browser.version < 11)
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doc.selection.clear();
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else
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window.getSelection().removeAllRanges();
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});
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},
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_clearSelection:function () {
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var list = ["J_operateBar", "J_colorBar", "J_brushBar", "J_eraserBar", "J_picBoard"];
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for (var i = 0, group; group = list[i++];) {
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domUtils.unSelectable($G(group));
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}
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},
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_saveOPerate:function (saveNum) {
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var me = this;
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if (drawStep.length <= saveNum) {
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if(drawStepIndex<drawStep.length){
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me.btn2disable("J_nextStep");
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drawStep.splice(drawStepIndex);
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}
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drawStep.push(context.getImageData(0, 0, context.canvas.width, context.canvas.height));
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drawStepIndex = drawStep.length;
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} else {
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drawStep.shift();
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drawStep.push(context.getImageData(0, 0, context.canvas.width, context.canvas.height));
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drawStepIndex = drawStep.length;
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}
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me.btn2Highlight("J_previousStep");
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me.btn2Highlight("J_clearBoard");
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},
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_originalColorSelect:function (title) {
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var colorList = $G("J_colorList").getElementsByTagName("td");
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for (var j = 0, cell; cell = colorList[j++];) {
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if (cell.children[0].title.toLowerCase() == title) {
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cell.children[0].style.opacity = 1;
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}
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}
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},
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_originalBrushSelect:function (text) {
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var brushList = $G("J_brushBar").children;
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for (var i = 0, ele; ele = brushList[i++];) {
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if (ele.tagName.toLowerCase() == "a") {
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var size = browser.ie ? ele.innerText : ele.text;
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if (size.toLowerCase() == text) {
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ele.style.opacity = 1;
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}
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}
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}
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},
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_addColorSelect:function (target) {
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var me = this,
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colorList = $G("J_colorList").getElementsByTagName("td"),
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eraserList = $G("J_eraserBar").children,
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brushList = $G("J_brushBar").children;
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for (var i = 0, cell; cell = colorList[i++];) {
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cell.children[0].style.opacity = 0.3;
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}
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for (var k = 0, ele; ele = brushList[k++];) {
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if (ele.tagName.toLowerCase() == "a") {
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ele.style.opacity = 0.3;
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var size = browser.ie ? ele.innerText : ele.text;
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if (size.toLowerCase() == this.brushWidth) {
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ele.style.opacity = 1;
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}
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}
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}
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for (var j = 0, node; node = eraserList[j++];) {
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if (node.tagName.toLowerCase() == "a") {
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node.style.opacity = 0.3;
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}
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}
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target.style.opacity = 1;
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target.blur();
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},
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_addBESelect:function (target) {
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var brushList = $G("J_brushBar").children;
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var eraserList = $G("J_eraserBar").children;
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for (var i = 0, ele; ele = brushList[i++];) {
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if (ele.tagName.toLowerCase() == "a") {
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ele.style.opacity = 0.3;
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}
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}
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for (var j = 0, node; node = eraserList[j++];) {
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if (node.tagName.toLowerCase() == "a") {
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node.style.opacity = 0.3;
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}
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}
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target.style.opacity = 1;
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target.blur();
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},
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getCanvasData:function () {
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var picContainer = $G("J_picBoard"),
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img = picContainer.children[0];
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if (img) {
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var x, y;
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if (img.style.position == "absolute") {
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x = parseInt(img.style.left);
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y = parseInt(img.style.top);
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} else {
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x = (picContainer.offsetWidth - img.width) / 2;
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y = (picContainer.offsetHeight - img.height) / 2;
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}
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context.globalCompositeOperation = "destination-over";
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context.drawImage(img, x, y, img.width, img.height);
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} else {
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context.globalCompositeOperation = "destination-atop";
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context.fillStyle = "#fff";//重置画布背景白色
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context.fillRect(0, 0, canvas.width, canvas.height);
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}
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try {
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return canvas.toDataURL("image/png").substring(22);
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} catch (e) {
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return "";
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}
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},
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btn2Highlight:function (id) {
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var cur = $G(id);
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cur.className.indexOf("H") == -1 && (cur.className += "H");
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},
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btn2disable:function (id) {
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var cur = $G(id);
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cur.className.indexOf("H") != -1 && (cur.className = cur.className.replace("H", ""));
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},
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getTarget:function (evt) {
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return evt.target || evt.srcElement;
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}
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};
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})();
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var ScaleBoy = function () {
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this.dom = null;
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this.scalingElement = null;
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};
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(function () {
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function _appendStyle() {
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var doc = document,
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head = doc.getElementsByTagName('head')[0],
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style = doc.createElement('style'),
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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);}'
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+ '.scale span{position:absolute;left:0;top:0;width:6px;height:6px;background-color:#006DAE;}'
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+ '.scale .hand0, .scale .hand7{cursor:nw-resize;}'
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+ '.scale .hand1, .scale .hand6{left:50%;margin-left:-3px;cursor:n-resize;}'
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+ '.scale .hand2, .scale .hand4, .scale .hand7{left:100%;margin-left:-6px;}'
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+ '.scale .hand3, .scale .hand4{top:50%;margin-top:-3px;cursor:w-resize;}'
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+ '.scale .hand5, .scale .hand6, .scale .hand7{margin-top:-6px;top:100%;}'
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+ '.scale .hand2, .scale .hand5{cursor:ne-resize;}';
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style.type = 'text/css';
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try {
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style.appendChild(doc.createTextNode(cssText));
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} catch (e) {
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style.styleSheet.cssText = cssText;
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}
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head.appendChild(style);
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}
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function _getDom() {
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var doc = document,
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hand,
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arr = [],
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scale = doc.createElement('div');
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scale.id = 'J_scaleCon';
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scale.className = 'scale';
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for (var i = 0; i < 8; i++) {
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arr.push("<span class='hand" + i + "'></span>");
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}
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scale.innerHTML = arr.join("");
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return scale;
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}
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var rect = [
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//[left, top, width, height]
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[1, 1, -1, -1],
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[0, 1, 0, -1],
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[0, 1, 1, -1],
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[1, 0, -1, 0],
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[0, 0, 1, 0],
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[1, 0, -1, 1],
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[0, 0, 0, 1],
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[0, 0, 1, 1]
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];
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ScaleBoy.prototype = {
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init:function () {
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_appendStyle();
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var me = this,
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scale = me.dom = _getDom();
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me.scaleMousemove.fp = me;
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domUtils.on(scale, 'mousedown', function (e) {
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var target = e.target || e.srcElement;
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me.start = {x:e.clientX, y:e.clientY};
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if (target.className.indexOf('hand') != -1) {
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me.dir = target.className.replace('hand', '');
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}
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domUtils.on(document.body, 'mousemove', me.scaleMousemove);
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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()'/>");
|
|
}
|
|
}
|
|
|