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Viewing file:     Text.js (2.29 KB)      -rw-r--r--

var Displayable = require("./Displayable");

var zrUtil = require("../core/util");

var textContain = require("../contain/text");

var textHelper = require("./helper/text");

var _constant = require("./constant");

var ContextCachedBy = _constant.ContextCachedBy;

/**
 * @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);
var _default = Text;
module.exports = _default;