dragonbones-runtime
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the tools to build dragonbones file for diffrent framework
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text/typescript
//////////////////////////////////////////////////////////////////////////////////////
//
// 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 $getHalign(textfield:egret.TextField):number {
let lineArr:Array<egret.ILineElement> = textfield.$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<egret.ILineElement> = 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 $getHit(textfield:egret.TextField, x:number, y:number):IHitTextElement {
let lineArr:Array<egret.ILineElement> = textfield.$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;
}
}
}