////////////////////////////////////////////////////////////////////////////////////// // // Copyright (c) 2014-present, Egret Technology. // All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution. // * Neither the name of the Egret nor the // names of its contributors may be used to endorse or promote products // derived from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY EGRET AND CONTRIBUTORS "AS IS" AND ANY EXPRESS // OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. // IN NO EVENT SHALL EGRET AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;LOSS OF USE, DATA, // OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, // EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // ////////////////////////////////////////////////////////////////////////////////////// namespace egret { /** * @private * @version Egret 2.4 * @platform Web,Native */ export class TextFieldUtils { /** * 获取第一个绘制的行数 * @param textfield 文本 * @returns {number} 行数，从0开始 * @private */ static $getStartLine(textfield:egret.TextField):number { let values = textfield.$TextField; let textHeight:number = TextFieldUtils.$getTextHeight(textfield); let startLine:number = 0; let textFieldHeight: number = values[sys.TextKeys.textFieldHeight]; if (!isNaN(textFieldHeight)) {// if (textHeight < textFieldHeight) {//最大高度比需要显示的高度小 } else if (textHeight > textFieldHeight) {//最大高度比需要显示的高度大 startLine = Math.max(values[sys.TextKeys.scrollV] - 1, 0); startLine = Math.min(values[sys.TextKeys.numLines] - 1, startLine); } if (!values[sys.TextKeys.multiline]) { startLine = Math.max(values[sys.TextKeys.scrollV] - 1, 0); if (values[sys.TextKeys.numLines] > 0) { startLine = Math.min(values[sys.TextKeys.numLines] - 1, startLine); } } } return startLine; } /** * 获取水平比例 * @param textfield 文本 * @returns {number} 水平比例 * @private */ static $getHalign(textfield:egret.TextField):number { let lineArr:Array = textfield.$getLinesArr(); let halign:number = 0; if (textfield.$TextField[sys.TextKeys.textAlign] == HorizontalAlign.CENTER) { halign = 0.5; } else if (textfield.$TextField[sys.TextKeys.textAlign] == HorizontalAlign.RIGHT) { halign = 1; } if (textfield.$TextField[sys.TextKeys.type] == egret.TextFieldType.INPUT && !textfield.$TextField[sys.TextKeys.multiline] && lineArr.length > 1) { halign = 0; } return halign; } /** * @private * * @param textfield * @returns */ static $getTextHeight(textfield:egret.TextField):number { let textHeight:number = (egret.TextFieldType.INPUT == textfield.$TextField[sys.TextKeys.type] && !textfield.$TextField[sys.TextKeys.multiline]) ? textfield.$TextField[sys.TextKeys.fontSize] : (textfield.$TextField[sys.TextKeys.textHeight] + (textfield.$TextField[sys.TextKeys.numLines] - 1) * textfield.$TextField[sys.TextKeys.lineSpacing]); return textHeight; } /** * 获取垂直比例 * @param textfield 文本 * @returns {number} 垂直比例 * @private */ static $getValign(textfield:egret.TextField):number{ let textHeight:number = TextFieldUtils.$getTextHeight(textfield); //if (textfield.$TextField[sys.TextKeys.type] == egret.TextFieldType.INPUT) { // if (textfield.$TextField[sys.TextKeys.multiline]) { //return 0; //} //return 0.5; //} let textFieldHeight:number = textfield.$TextField[sys.TextKeys.textFieldHeight]; if (!isNaN(textFieldHeight)) {// if (textHeight < textFieldHeight) {//最大高度比需要显示的高度小 let valign:number = 0; if (textfield.$TextField[sys.TextKeys.verticalAlign] == VerticalAlign.MIDDLE) valign = 0.5; else if (textfield.$TextField[sys.TextKeys.verticalAlign] == VerticalAlign.BOTTOM) valign = 1; return valign; } } return 0; } /** * 根据x、y获取文本项 * @param textfield 文本 * @param x x坐标值 * @param y y坐标值 * @returns 文本单项 * @private */ static $getTextElement(textfield:egret.TextField, x:number, y:number):ITextElement { let hitTextEle:IHitTextElement = TextFieldUtils.$getHit(textfield, x, y); let lineArr:Array = textfield.$getLinesArr(); if (hitTextEle && lineArr[hitTextEle.lineIndex] && lineArr[hitTextEle.lineIndex].elements[hitTextEle.textElementIndex]) { return lineArr[hitTextEle.lineIndex].elements[hitTextEle.textElementIndex]; } return null; } /** * 获取文本点击块 * @param textfield 文本 * @param x x坐标值 * @param y y坐标值 * @returns 文本点击块 * @private */ static $getHit(textfield:egret.TextField, x:number, y:number):IHitTextElement { let lineArr:Array = textfield.$getLinesArr(); if (textfield.$TextField[sys.TextKeys.textFieldWidth] == 0) {//文本可点击区域 return null; } let line:number = 0; let textHeight:number = TextFieldUtils.$getTextHeight(textfield); let startY:number = 0; let textFieldHeight:number = textfield.$TextField[sys.TextKeys.textFieldHeight]; if (!isNaN(textFieldHeight) && textFieldHeight > textHeight) { let valign:number = TextFieldUtils.$getValign(textfield); startY = valign * (textFieldHeight - textHeight); if (startY != 0) { y -= startY; } } let startLine:number = TextFieldUtils.$getStartLine(textfield); let lineH:number = 0; for (let i:number = startLine; i < lineArr.length; i++) { let lineEle:egret.ILineElement = lineArr[i]; if (lineH + lineEle.height >= y) { if (lineH < y) { line = i + 1; } break; } else { lineH += lineEle.height; } if (lineH + textfield.$TextField[sys.TextKeys.lineSpacing] > y) { return null; } lineH += textfield.$TextField[sys.TextKeys.lineSpacing]; } if(line == 0) { return null; } let lineElement:egret.ILineElement = lineArr[line - 1]; let textFieldWidth:number = textfield.$TextField[sys.TextKeys.textFieldWidth]; if (isNaN(textFieldWidth)) { textFieldWidth = textfield.textWidth; } let halign:number = TextFieldUtils.$getHalign(textfield); x -= halign * (textFieldWidth - lineElement.width); let lineW:number = 0; for (let i = 0; i < lineElement.elements.length; i++) { let iwTE:IWTextElement = lineElement.elements[i]; if (lineW + iwTE.width <= x) { lineW += iwTE.width; } else if (lineW < x) { return {"lineIndex" : line - 1, "textElementIndex" : i}; } } return null; } /** * 获取当前显示多少行 * @param textfield 文本 * @returns {number} 显示的行数 * @private */ static $getScrollNum(textfield:egret.TextField):number { let scrollNum:number = 1; if (textfield.$TextField[sys.TextKeys.multiline]) { let height = textfield.height; let size = textfield.size; let lineSpacing = textfield.lineSpacing; scrollNum = Math.floor(height / (size + lineSpacing)); let leftH = height - (size + lineSpacing) * scrollNum; if (leftH > size / 2) { scrollNum++; } } return scrollNum; } } }