CCLabelTTFCanvasRenderCmd.js

/****************************************************************************
 Copyright (c) 2013-2014 Chukong Technologies Inc.

 http://www.cocos2d-x.org

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

cc.LabelTTF._textAlign = ["left", "center", "right"];
cc.LabelTTF._textBaseline = ["top", "middle", "bottom"];

//check the first character
cc.LabelTTF.wrapInspection = true;

//Support: English French German
//Other as Oriental Language
cc.LabelTTF._wordRex = /([a-zA-Z0-9ÄÖÜäöüßéèçàùêâîôû]+|\S)/;
cc.LabelTTF._symbolRex = /^[!,.:;}\]%\?>、‘“》？。，！]/;
cc.LabelTTF._lastWordRex = /([a-zA-Z0-9ÄÖÜäöüßéèçàùêâîôû]+|\S)$/;
cc.LabelTTF._lastEnglish = /[a-zA-Z0-9ÄÖÜäöüßéèçàùêâîôû]+$/;
cc.LabelTTF._firsrEnglish = /^[a-zA-Z0-9ÄÖÜäöüßéèçàùêâîôû]/;

(function() {
    cc.LabelTTF.RenderCmd = function () {
        this._fontClientHeight = 18;
        this._fontStyleStr = "";
        this._shadowColorStr = "rgba(128, 128, 128, 0.5)";
        this._strokeColorStr = "";
        this._fillColorStr = "rgba(255,255,255,1)";

        this._labelCanvas = null;
        this._labelContext = null;
        this._lineWidths = [];
        this._strings = [];
        this._isMultiLine = false;
    };
    var proto = cc.LabelTTF.RenderCmd.prototype;

    proto.constructor = cc.LabelTTF.RenderCmd;

    proto._getLabelContext = function () {
        if (this._labelContext)
            return this._labelContext;

        var node = this._node;
        if (!this._labelCanvas) {
            var locCanvas = cc.newElement("canvas");
            locCanvas.width = 1;
            locCanvas.height = 1;
            var labelTexture = new cc.Texture2D();
            labelTexture.initWithElement(locCanvas);
            node.setTexture(labelTexture);
            this._labelCanvas = locCanvas;
        }
        this._labelContext = this._labelCanvas.getContext("2d");
        return this._labelContext;
    };

    proto._setFontStyle = function (fontNameOrFontDef, fontSize, fontStyle, fontWeight) {

        if(fontNameOrFontDef instanceof cc.FontDefinition){
            this._fontStyleStr = fontNameOrFontDef._getCanvasFontStr();
            this._fontClientHeight = cc.LabelTTF.__getFontHeightByDiv(fontNameOrFontDef);

        }else {
            this._fontStyleStr = fontStyle + " " + fontWeight + " " + fontSize + "px '" + fontNameOrFontDef + "'";
            this._fontClientHeight = cc.LabelTTF.__getFontHeightByDiv(fontNameOrFontDef, fontSize);
        }
    };

    proto._getFontStyle = function () {
        return this._fontStyleStr;
    };

    proto._getFontClientHeight = function () {
        return this._fontClientHeight;
    };

    proto._updateTexture = function () {
        this._dirtyFlag = this._dirtyFlag & cc.Node._dirtyFlags.textDirty ^ this._dirtyFlag;
        var node = this._node;
        var locContext = this._getLabelContext(), locLabelCanvas = this._labelCanvas;
        var locContentSize = node._contentSize;

        if (node._string.length === 0) {
            locLabelCanvas.width = 1;
            locLabelCanvas.height = locContentSize.height || 1;
            node._texture && node._texture.handleLoadedTexture();
            node.setTextureRect(cc.rect(0, 0, 1, locContentSize.height));
            return true;
        }

        //set size for labelCanvas
        locContext.font = this._fontStyleStr;
        this._updateTTF();
        var width = locContentSize.width, height = locContentSize.height;
        var flag = locLabelCanvas.width === width && locLabelCanvas.height === height;
        locLabelCanvas.width = width;
        locLabelCanvas.height = height;
        if (flag) locContext.clearRect(0, 0, width, height);

        //draw text to labelCanvas
        this._drawTTFInCanvas(locContext);
        node._texture && node._texture.handleLoadedTexture();

        node.setTextureRect(cc.rect(0, 0, width, height));
        return true;
    };

    proto._measureConfig = function () {
        this._getLabelContext().font = this._fontStyleStr;
    };

    proto._measure = function (text) {
        return this._getLabelContext().measureText(text).width;
    };

    proto._updateTTF = function () {
        var node = this._node;
        var locDimensionsWidth = node._dimensions.width, i, strLength;
        var locLineWidth = this._lineWidths;
        locLineWidth.length = 0;

        this._isMultiLine = false;
        this._measureConfig();
        if (locDimensionsWidth !== 0) {
            // Content processing
            this._strings = node._string.split('\n');

            for (i = 0; i < this._strings.length; i++) {
                this._checkWarp(this._strings, i, locDimensionsWidth);
            }
        } else {
            this._strings = node._string.split('\n');
            for (i = 0, strLength = this._strings.length; i < strLength; i++) {
                locLineWidth.push(this._measure(this._strings[i]));
            }
        }

        if (this._strings.length > 0)
            this._isMultiLine = true;

        var locSize, locStrokeShadowOffsetX = 0, locStrokeShadowOffsetY = 0;
        if (node._strokeEnabled)
            locStrokeShadowOffsetX = locStrokeShadowOffsetY = node._strokeSize * 2;
        if (node._shadowEnabled) {
            var locOffsetSize = node._shadowOffset;
            locStrokeShadowOffsetX += Math.abs(locOffsetSize.x) * 2;
            locStrokeShadowOffsetY += Math.abs(locOffsetSize.y) * 2;
        }

        //get offset for stroke and shadow
        if (locDimensionsWidth === 0) {
            if (this._isMultiLine)
                locSize = cc.size(Math.ceil(Math.max.apply(Math, locLineWidth) + locStrokeShadowOffsetX),
                        Math.ceil((this._fontClientHeight * this._strings.length) + locStrokeShadowOffsetY));
            else
                locSize = cc.size(Math.ceil(this._measure(node._string) + locStrokeShadowOffsetX), Math.ceil(this._fontClientHeight + locStrokeShadowOffsetY));
        } else {
            if (node._dimensions.height === 0) {
                if (this._isMultiLine)
                    locSize = cc.size(Math.ceil(locDimensionsWidth + locStrokeShadowOffsetX), Math.ceil((node.getLineHeight() * this._strings.length) + locStrokeShadowOffsetY));
                else
                    locSize = cc.size(Math.ceil(locDimensionsWidth + locStrokeShadowOffsetX), Math.ceil(node.getLineHeight() + locStrokeShadowOffsetY));
            } else {
                //dimension is already set, contentSize must be same as dimension
                locSize = cc.size(Math.ceil(locDimensionsWidth + locStrokeShadowOffsetX), Math.ceil(node._dimensions.height + locStrokeShadowOffsetY));
            }
        }
        if(node._getFontStyle() !== "normal"){    //add width for 'italic' and 'oblique'
            locSize.width = Math.ceil(locSize.width + node._fontSize * 0.3);
        }
        node.setContentSize(locSize);
        node._strokeShadowOffsetX = locStrokeShadowOffsetX;
        node._strokeShadowOffsetY = locStrokeShadowOffsetY;

        // need computing _anchorPointInPoints
        var locAP = node._anchorPoint;
        this._anchorPointInPoints.x = (locStrokeShadowOffsetX * 0.5) + ((locSize.width - locStrokeShadowOffsetX) * locAP.x);
        this._anchorPointInPoints.y = (locStrokeShadowOffsetY * 0.5) + ((locSize.height - locStrokeShadowOffsetY) * locAP.y);
    };

    proto._drawTTFInCanvas = function (context) {
        if (!context)
            return;
        var node = this._node;
        var locStrokeShadowOffsetX = node._strokeShadowOffsetX, locStrokeShadowOffsetY = node._strokeShadowOffsetY;
        var locContentSizeHeight = node._contentSize.height - locStrokeShadowOffsetY, locVAlignment = node._vAlignment,
            locHAlignment = node._hAlignment, locStrokeSize = node._strokeSize;

        context.setTransform(1, 0, 0, 1, locStrokeShadowOffsetX * 0.5, locContentSizeHeight + locStrokeShadowOffsetY * 0.5);

        //this is fillText for canvas
        if (context.font !== this._fontStyleStr)
            context.font = this._fontStyleStr;
        context.fillStyle = this._fillColorStr;

        var xOffset = 0, yOffset = 0;
        //stroke style setup
        var locStrokeEnabled = node._strokeEnabled;
        if (locStrokeEnabled) {
            context.lineWidth = locStrokeSize * 2;
            context.strokeStyle = this._strokeColorStr;
        }

        //shadow style setup
        if (node._shadowEnabled) {
            var locShadowOffset = node._shadowOffset;
            context.shadowColor = this._shadowColorStr;
            context.shadowOffsetX = locShadowOffset.x;
            context.shadowOffsetY = -locShadowOffset.y;
            context.shadowBlur = node._shadowBlur;
        }

        context.textBaseline = cc.LabelTTF._textBaseline[locVAlignment];
        context.textAlign = cc.LabelTTF._textAlign[locHAlignment];

        var locContentWidth = node._contentSize.width - locStrokeShadowOffsetX;

        //lineHeight
        var lineHeight = node.getLineHeight();
        var transformTop = (lineHeight - this._fontClientHeight) / 2;

        if (locHAlignment === cc.TEXT_ALIGNMENT_RIGHT)
            xOffset += locContentWidth;
        else if (locHAlignment === cc.TEXT_ALIGNMENT_CENTER)
            xOffset += locContentWidth / 2;
        else
            xOffset += 0;
        if (this._isMultiLine) {
            var locStrLen = this._strings.length;
            if (locVAlignment === cc.VERTICAL_TEXT_ALIGNMENT_BOTTOM)
                yOffset = lineHeight - transformTop * 2 + locContentSizeHeight - lineHeight * locStrLen;
            else if (locVAlignment === cc.VERTICAL_TEXT_ALIGNMENT_CENTER)
                yOffset = (lineHeight - transformTop * 2) / 2 + (locContentSizeHeight - lineHeight * locStrLen) / 2;

            for (var i = 0; i < locStrLen; i++) {
                var line = this._strings[i];
                var tmpOffsetY = -locContentSizeHeight + (lineHeight * i + transformTop) + yOffset;
                if (locStrokeEnabled)
                    context.strokeText(line, xOffset, tmpOffsetY);
                context.fillText(line, xOffset, tmpOffsetY);
            }
        } else {
            if (locVAlignment === cc.VERTICAL_TEXT_ALIGNMENT_BOTTOM) {
                //do nothing
            } else if (locVAlignment === cc.VERTICAL_TEXT_ALIGNMENT_TOP) {
                yOffset -= locContentSizeHeight;
            } else {
                yOffset -= locContentSizeHeight * 0.5;
            }
            if (locStrokeEnabled)
                context.strokeText(node._string, xOffset, yOffset);
            context.fillText(node._string, xOffset, yOffset);
        }
    };

    proto._checkWarp = function (strArr, i, maxWidth) {
        var text = strArr[i];
        var allWidth = this._measure(text);
        if (allWidth > maxWidth && text.length > 1) {

            var fuzzyLen = text.length * ( maxWidth / allWidth ) | 0;
            var tmpText = text.substr(fuzzyLen);
            var width = allWidth - this._measure(tmpText);
            var sLine;
            var pushNum = 0;

            //Increased while cycle maximum ceiling. default 100 time
            var checkWhile = 0;

            //Exceeded the size
            while (width > maxWidth && checkWhile++ < 100) {
                fuzzyLen *= maxWidth / width;
                fuzzyLen = fuzzyLen | 0;
                tmpText = text.substr(fuzzyLen);
                width = allWidth - this._measure(tmpText);
            }

            checkWhile = 0;

            //Find the truncation point
            while (width < maxWidth && checkWhile++ < 100) {
                if (tmpText) {
                    var exec = cc.LabelTTF._wordRex.exec(tmpText);
                    pushNum = exec ? exec[0].length : 1;
                    sLine = tmpText;
                }

                fuzzyLen = fuzzyLen + pushNum;
                tmpText = text.substr(fuzzyLen);
                width = allWidth - this._measure(tmpText);
            }

            fuzzyLen -= pushNum;
            if (fuzzyLen === 0) {
                fuzzyLen = 1;
                sLine = sLine.substr(1);
            }

            var sText = text.substr(0, fuzzyLen), result;

            //symbol in the first
            if (cc.LabelTTF.wrapInspection) {
                if (cc.LabelTTF._symbolRex.test(sLine || tmpText)) {
                    result = cc.LabelTTF._lastWordRex.exec(sText);
                    fuzzyLen -= result ? result[0].length : 0;

                    sLine = text.substr(fuzzyLen);
                    sText = text.substr(0, fuzzyLen);
                }
            }

            //To judge whether a English words are truncated
            if (cc.LabelTTF._firsrEnglish.test(sLine)) {
                result = cc.LabelTTF._lastEnglish.exec(sText);
                if (result && sText !== result[0]) {
                    fuzzyLen -= result[0].length;
                    sLine = text.substr(fuzzyLen);
                    sText = text.substr(0, fuzzyLen);
                }
            }

            strArr[i] = sLine || tmpText;
            strArr.splice(i, 0, sText);
        }
    };
})();

(function(){
    cc.LabelTTF.CanvasRenderCmd = function (renderable) {
        cc.Sprite.CanvasRenderCmd.call(this, renderable);
        cc.LabelTTF.RenderCmd.call(this);
    };

    cc.LabelTTF.CanvasRenderCmd.prototype = Object.create(cc.Sprite.CanvasRenderCmd.prototype);
    cc.inject(cc.LabelTTF.RenderCmd.prototype, cc.LabelTTF.CanvasRenderCmd.prototype);

    var proto = cc.LabelTTF.CanvasRenderCmd.prototype;
    proto.constructor = cc.LabelTTF.CanvasRenderCmd;

    proto.updateStatus = function () {
        var flags = cc.Node._dirtyFlags, locFlag = this._dirtyFlag;
        var colorDirty = locFlag & flags.colorDirty,
            opacityDirty = locFlag & flags.opacityDirty;

        if (colorDirty)
            this._updateDisplayColor();
        if (opacityDirty)
            this._updateDisplayOpacity();

        if(colorDirty){
            this._updateColor();
        }else if(locFlag & flags.textDirty)
            this._updateTexture();

        if (this._dirtyFlag & flags.transformDirty){
            this.transform(this.getParentRenderCmd(), true);
            this._dirtyFlag = this._dirtyFlag & cc.Node._dirtyFlags.transformDirty ^ this._dirtyFlag;
        }
    };

    proto._syncStatus = function (parentCmd) {
        var flags = cc.Node._dirtyFlags, locFlag = this._dirtyFlag;
        var parentNode = parentCmd ? parentCmd._node : null;

        if(parentNode && parentNode._cascadeColorEnabled && (parentCmd._dirtyFlag & flags.colorDirty))
            locFlag |= flags.colorDirty;

        if(parentNode && parentNode._cascadeOpacityEnabled && (parentCmd._dirtyFlag & flags.opacityDirty))
            locFlag |= flags.opacityDirty;

        if(parentCmd && (parentCmd._dirtyFlag & flags.transformDirty))
            locFlag |= flags.transformDirty;

        var colorDirty = locFlag & flags.colorDirty,
            opacityDirty = locFlag & flags.opacityDirty;

        this._dirtyFlag = locFlag;

        if (colorDirty)
            this._syncDisplayColor();
        if (opacityDirty)
            this._syncDisplayOpacity();

        if(colorDirty){
            this._updateColor();
        }else if(locFlag & flags.textDirty)
            this._updateTexture();

        if (locFlag & flags.transformDirty)                 //update the transform
            this.transform(parentCmd);
    };

    proto._setColorsString = function () {
        var locDisplayColor = this._displayedColor, node = this._node,
            locShadowColor = node._shadowColor || this._displayedColor;
        var locStrokeColor = node._strokeColor, locFontFillColor = node._textFillColor;
        var dr = locDisplayColor.r / 255, dg = locDisplayColor.g / 255, db = locDisplayColor.b / 255;

        this._shadowColorStr = "rgba(" + (0 | (dr * locShadowColor.r)) + "," + (0 | ( dg * locShadowColor.g)) + ","
            + (0 | (db * locShadowColor.b)) + "," + node._shadowOpacity + ")";
        this._fillColorStr = "rgba(" + (0 | (dr * locFontFillColor.r)) + "," + (0 | (dg * locFontFillColor.g)) + ","
            + (0 | (db * locFontFillColor.b)) + ", 1)";
        this._strokeColorStr = "rgba(" + (0 | (dr * locStrokeColor.r)) + "," + (0 | (dg * locStrokeColor.g)) + ","
            + (0 | (db * locStrokeColor.b)) + ", 1)";
    };

    proto._updateColor = function(){
        this._setColorsString();
        this._updateTexture();
    };
})();