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;

// These regular expressions consider a word any sequence of characters
// from these Unicode (sub)blocks:
// - Basic Latin (letters and numbers, plus the hypen-minus '-')
// - Latin-1 Supplement (accentuated letters and ¿¡ only)
// - Latin Extended-A (complete)
// - Latin Extended-B (complete)
// - IPA Extensions (complete)
// - Spacing Modifier Letters (complete)
// - Combining Diacritical Marks (Combining Grapheme Joiner excluded)
// - Greek and Coptic (complete, including reserved code points)
// - Cyrillic (complete)
// - Cyrillic Supplement (complete)
// - General Punctuation (Non-Breaking Hyphen* [U+2011] and quotation marks)
// * Note that Hyphen [U+2010] is considered a word boundary.
cc.LabelTTF._wordRex = /([a-zA-Z0-9\-¿¡«À-ÖØ-öø-ʯ\u0300-\u034e\u0350-\u036FͰ-ԯ\u2011‵-‷‹⁅]+|\S)/;
cc.LabelTTF._symbolRex = /^[!,.:;}\]%\?>、‘“》»？。，！\u2010′-‴›‼⁆⁇-⁉]/;
cc.LabelTTF._lastWordRex = /([a-zA-Z0-9\-¿¡«À-ÖØ-öø-ʯ\u0300-\u034e\u0350-\u036FͰ-ԯ\u2011‵-‷‹⁅]+|\S)$/;
cc.LabelTTF._lastEnglish = /[a-zA-Z0-9\-¿¡«À-ÖØ-öø-ʯ\u0300-\u034e\u0350-\u036FͰ-ԯ\u2011‵-‷‹⁅]+$/;
cc.LabelTTF._firsrEnglish = /^[a-zA-Z0-9\-¿¡«À-ÖØ-öø-ʯ\u0300-\u034e\u0350-\u036FͰ-ԯ\u2011‵-‷‹⁅]/;

(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;
        this._status = [];
        this._renderingIndex = 0;

        this._canUseDirtyRegion = true;
    };
    var proto = cc.LabelTTF.RenderCmd.prototype;
    proto.constructor = cc.LabelTTF.RenderCmd;
    proto._labelCmdCtor = cc.LabelTTF.RenderCmd;

    proto._setFontStyle = function (fontNameOrFontDef, fontSize, fontStyle, fontWeight) {
        if (fontNameOrFontDef instanceof cc.FontDefinition) {
            this._fontStyleStr = fontNameOrFontDef._getCanvasFontStr();
            this._fontClientHeight = cc.LabelTTF.__getFontHeightByDiv(fontNameOrFontDef);
        } else {
            var deviceFontSize = fontSize * cc.view.getDevicePixelRatio();
            this._fontStyleStr = fontStyle + " " + fontWeight + " " + deviceFontSize + "px '" + fontNameOrFontDef + "'";
            this._fontClientHeight = cc.LabelTTF.__getFontHeightByDiv(fontNameOrFontDef, fontSize);
        }
    };

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

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

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

    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)";
    };

    var localBB = new cc.Rect();
    proto.getLocalBB = function () {
        var node = this._node;
        localBB.x = localBB.y = 0;
        var pixelRatio = cc.view.getDevicePixelRatio();
        localBB.width = node._getWidth() * pixelRatio;
        localBB.height = node._getHeight() * pixelRatio;
        return localBB;
    };

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

        this._isMultiLine = false;
        this._measureConfig();
        var textWidthCache = {};
        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++) {
                if(this._strings[i]) {
                    var measuredWidth = this._measure(this._strings[i]);
                    locLineWidth.push(measuredWidth);
                    textWidthCache[this._strings[i]] = measuredWidth;
                } else {
                    locLineWidth.push(0);
                }
            }
        }

        if (this._strings.length > 1)
            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 * pixelRatio * this._strings.length) + locStrokeShadowOffsetY));
            }
            else {
                var measuredWidth = textWidthCache[node._string];
                if(!measuredWidth && node._string) {
                    measuredWidth = this._measure(node._string);
                }
                locSize = cc.size(Math.ceil((measuredWidth ? measuredWidth : 0) + locStrokeShadowOffsetX),
                                  Math.ceil(this._fontClientHeight * pixelRatio + locStrokeShadowOffsetY));
            }
        } else {
            if (node._dimensions.height === 0) {
                if (this._isMultiLine)
                    locSize = cc.size(
                        Math.ceil(locDimensionsWidth + locStrokeShadowOffsetX),
                        Math.ceil((node.getLineHeight() * pixelRatio * this._strings.length) + locStrokeShadowOffsetY));
                else
                    locSize = cc.size(
                        Math.ceil(locDimensionsWidth + locStrokeShadowOffsetX),
                        Math.ceil(node.getLineHeight() * pixelRatio + locStrokeShadowOffsetY));
            } else {
                //dimension is already set, contentSize must be same as dimension
                locSize = cc.size(
                    Math.ceil(locDimensionsWidth + locStrokeShadowOffsetX),
                    Math.ceil(node._dimensions.height * pixelRatio + 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._saveStatus = function () {
        var node = this._node;
        var scale = cc.view.getDevicePixelRatio();
        var locStrokeShadowOffsetX = node._strokeShadowOffsetX, locStrokeShadowOffsetY = node._strokeShadowOffsetY;
        var locContentSizeHeight = node._contentSize.height - locStrokeShadowOffsetY, locVAlignment = node._vAlignment,
            locHAlignment = node._hAlignment;
        var dx = locStrokeShadowOffsetX * 0.5,
            dy = locContentSizeHeight + locStrokeShadowOffsetY * 0.5;
        var xOffset = 0, yOffset = 0, OffsetYArray = [];
        var locContentWidth = node._contentSize.width - locStrokeShadowOffsetX;

        //lineHeight
        var lineHeight = node.getLineHeight() * scale;
        var transformTop = (lineHeight - this._fontClientHeight * scale) / 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 tmpOffsetY = -locContentSizeHeight + (lineHeight * i + transformTop) + yOffset;
                OffsetYArray.push(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;
            }
            OffsetYArray.push(yOffset);
        }
        var tmpStatus = {
            contextTransform: cc.p(dx, dy),
            xOffset: xOffset,
            OffsetYArray: OffsetYArray
        };
        this._status.push(tmpStatus);
    };

    proto._drawTTFInCanvas = function (context) {
        if (!context)
            return;
        var locStatus = this._status.pop();
        context.setTransform(1, 0, 0, 1, locStatus.contextTransform.x, locStatus.contextTransform.y);
        var xOffset = locStatus.xOffset;
        var yOffsetArray = locStatus.OffsetYArray;
        this.drawLabels(context, xOffset, yOffsetArray);
    };

    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;
                    if (fuzzyLen === 0) fuzzyLen = 1;

                    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);
        }
    };

    proto.updateStatus = function () {
        var flags = cc.Node._dirtyFlags, locFlag = this._dirtyFlag;
        
        if (locFlag & flags.textDirty)
            this._updateTexture();

        this.originUpdateStatus();
    };

    proto._syncStatus = function (parentCmd) {
        var flags = cc.Node._dirtyFlags, locFlag = this._dirtyFlag;

        if (locFlag & flags.textDirty)
            this._updateTexture();

        this._originSyncStatus(parentCmd);

        if (cc._renderType === cc.game.RENDER_TYPE_WEBGL || locFlag & flags.transformDirty)
            this.transform(parentCmd);
    };

    proto.drawLabels = function (context, xOffset, yOffsetArray) {
        var node = this._node;
        //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;
        }

        var locHAlignment = node._hAlignment,
            locVAlignment = node._vAlignment,
            locStrokeSize = node._strokeSize;

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

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

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

        var locStrLen = this._strings.length;
        for (var i = 0; i < locStrLen; i++) {
            var line = this._strings[i];
            if (locStrokeEnabled)
                context.strokeText(line, xOffset, yOffsetArray[i]);
            context.fillText(line, xOffset, yOffsetArray[i]);
        }
        cc.g_NumberOfDraws++;
    };
})();

(function () {
    cc.LabelTTF.CacheRenderCmd = function () {
        this._labelCmdCtor();
        var locCanvas = this._labelCanvas = document.createElement("canvas");
        locCanvas.width = 1;
        locCanvas.height = 1;
        this._labelContext = locCanvas.getContext("2d");
    };

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

    var proto = cc.LabelTTF.CacheRenderCmd.prototype;
    proto.constructor = cc.LabelTTF.CacheRenderCmd;
    proto._cacheCmdCtor = cc.LabelTTF.CacheRenderCmd;

    proto._updateTexture = function () {
        this._dirtyFlag = this._dirtyFlag & cc.Node._dirtyFlags.textDirty ^ this._dirtyFlag;
        var node = this._node;
        node._needUpdateTexture = false;
        var locContentSize = node._contentSize;
        this._updateTTF();
        var width = locContentSize.width, height = locContentSize.height;

        var locContext = this._labelContext, locLabelCanvas = this._labelCanvas;

        if (!node._texture) {
            var labelTexture = new cc.Texture2D();
            labelTexture.initWithElement(this._labelCanvas);
            node.setTexture(labelTexture);
        }

        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;

        var flag = locLabelCanvas.width === width && locLabelCanvas.height === height;
        locLabelCanvas.width = width;
        locLabelCanvas.height = height;
        if (flag) locContext.clearRect(0, 0, width, height);
        this._saveStatus();
        this._drawTTFInCanvas(locContext);
        node._texture && node._texture.handleLoadedTexture();
        node.setTextureRect(cc.rect(0, 0, width, height));
        return true;
    };

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

    proto._measure = function (text) {
        if (text) {
            return this._labelContext.measureText(text).width;
        } else {
            return 0;
        }
    };

})();

(function () {
    cc.LabelTTF.CacheCanvasRenderCmd = function (renderable) {
        this._spriteCmdCtor(renderable);
        this._cacheCmdCtor();
    };

    var proto = cc.LabelTTF.CacheCanvasRenderCmd.prototype = Object.create(cc.Sprite.CanvasRenderCmd.prototype);
    cc.inject(cc.LabelTTF.CacheRenderCmd.prototype, proto);
    proto.constructor = cc.LabelTTF.CacheCanvasRenderCmd;
})();

(function () {
    cc.LabelTTF.CanvasRenderCmd = function (renderable) {
        this._spriteCmdCtor(renderable);
        this._labelCmdCtor();
    };

    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._measureConfig = function () {
    };

    proto._measure = function (text) {
        if(text) {
            var context = cc._renderContext.getContext();
            context.font = this._fontStyleStr;
            return context.measureText(text).width;
        } else {
            return 0;
        }
    };

    proto._updateTexture = function () {
        this._dirtyFlag = this._dirtyFlag & cc.Node._dirtyFlags.textDirty ^ this._dirtyFlag;
        var node = this._node;
        var locContentSize = node._contentSize;
        this._updateTTF();
        var width = locContentSize.width, height = locContentSize.height;
        if (node._string.length === 0) {
            node.setTextureRect(cc.rect(0, 0, 1, locContentSize.height));
            return true;
        }
        this._saveStatus();
        node.setTextureRect(cc.rect(0, 0, width, height));
        return true;
    };

    proto.rendering = function (ctx) {
        var scaleX = cc.view.getScaleX(),
            scaleY = cc.view.getScaleY();
        var wrapper = ctx || cc._renderContext, context = wrapper.getContext();
        if (!context)
            return;
        var node = this._node;
        wrapper.computeRealOffsetY();
        if (this._status.length <= 0)
            return;
        var locIndex = (this._renderingIndex >= this._status.length) ? this._renderingIndex - this._status.length : this._renderingIndex;
        var status = this._status[locIndex];
        this._renderingIndex = locIndex + 1;

        var locHeight = node._rect.height,
            locX = node._offsetPosition.x,
            locY = -node._offsetPosition.y - locHeight;

        var alpha = (this._displayedOpacity / 255);

        wrapper.setTransform(this._worldTransform, scaleX, scaleY);
        wrapper.setCompositeOperation(this._blendFuncStr);
        wrapper.setGlobalAlpha(alpha);

        wrapper.save();

        if (node._flippedX) {
            locX = -locX - node._rect.width;
            context.scale(-1, 1);
        }
        if (node._flippedY) {
            locY = node._offsetPosition.y;
            context.scale(1, -1);
        }

        var xOffset = status.xOffset + status.contextTransform.x + locX * scaleX;
        var yOffsetArray = [];

        var locStrLen = this._strings.length;
        for (var i = 0; i < locStrLen; i++)
            yOffsetArray.push(status.OffsetYArray[i] + status.contextTransform.y + locY * scaleY);

        this.drawLabels(context, xOffset, yOffsetArray);
        wrapper.restore();
    };
})();