Text.js
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import Displayable from './Displayable';
import * as zrUtil from '../core/util';
import * as textContain from '../contain/text';
import * as textHelper from './helper/text';
import {ContextCachedBy} from './constant';
/**
* @alias zrender/graphic/Text
* @extends module:zrender/graphic/Displayable
* @constructor
* @param {Object} opts
*/
var Text = function (opts) { // jshint ignore:line
Displayable.call(this, opts);
};
Text.prototype = {
constructor: Text,
type: 'text',
brush: function (ctx, prevEl) {
var style = this.style;
// Optimize, avoid normalize every time.
this.__dirty && textHelper.normalizeTextStyle(style, true);
// Use props with prefix 'text'.
style.fill = style.stroke = style.shadowBlur = style.shadowColor =
style.shadowOffsetX = style.shadowOffsetY = null;
var text = style.text;
// Convert to string
text != null && (text += '');
// Do not apply style.bind in Text node. Because the real bind job
// is in textHelper.renderText, and performance of text render should
// be considered.
// style.bind(ctx, this, prevEl);
if (!textHelper.needDrawText(text, style)) {
// The current el.style is not applied
// and should not be used as cache.
ctx.__attrCachedBy = ContextCachedBy.NONE;
return;
}
this.setTransform(ctx);
textHelper.renderText(this, ctx, text, style, null, prevEl);
this.restoreTransform(ctx);
},
getBoundingRect: function () {
var style = this.style;
// Optimize, avoid normalize every time.
this.__dirty && textHelper.normalizeTextStyle(style, true);
if (!this._rect) {
var text = style.text;
text != null ? (text += '') : (text = '');
var rect = textContain.getBoundingRect(
style.text + '',
style.font,
style.textAlign,
style.textVerticalAlign,
style.textPadding,
style.textLineHeight,
style.rich
);
rect.x += style.x || 0;
rect.y += style.y || 0;
if (textHelper.getStroke(style.textStroke, style.textStrokeWidth)) {
var w = style.textStrokeWidth;
rect.x -= w / 2;
rect.y -= w / 2;
rect.width += w;
rect.height += w;
}
this._rect = rect;
}
return this._rect;
}
};
zrUtil.inherits(Text, Displayable);
export default Text;