Method getFigureSize

js/src/Figure.ts:104–249

()

  }

  protected getFigureSize(): IFigureSize {
    const domSize: IFigureSize = this.el.getBoundingClientRect();

    if (!this.autoLayout) {
      const clientRectRatio = domSize.width / domSize.height;

      const minRatio: number = this.model.get('min_aspect_ratio');
      const maxRatio: number = this.model.get('max_aspect_ratio');

      if (clientRectRatio < minRatio) {
        // Too much vertical space: Keep horizontal space but compute height from min aspect ratio
        domSize.height = domSize.width / minRatio;
      } else if (clientRectRatio > maxRatio) {
        // Too much horizontal space: Keep vertical space but compute width from max aspect ratio
        domSize.width = domSize.height * maxRatio;
      }

      return domSize;
    }

    let solver = new kiwi.Solver();
    var width = new kiwi.Variable();
    var height = new kiwi.Variable();

    // calculate padding by summing up all auto sizes + fig_margins
    var padding = { top: 0, bottom: 0, left: 0, right: 0 };
    const fig_margin = this.model.get('fig_margin');
    ['top', 'bottom', 'left', 'right'].forEach((side) => {
      padding[side] = this.decorators[side].reduce((total, decorator) => {
        decorator.setAutoOffset(total);
        return total + decorator.calculateAutoSize();
      }, 0);
      padding[side] += fig_margin[side];
    });

    solver.addEditVariable(width, kiwi.Strength.strong);
    solver.addEditVariable(height, kiwi.Strength.strong);
    solver.suggestValue(width, domSize.width);
    solver.suggestValue(height, domSize.height);

    /*
      We want the figure size to always be inside the dom element:
        width + padding.left + padding.right <= domSize.width
        width + padding.left + padding.right - domSize.width < 0
      If we don't add these constraints, the width and height might actually grow
    */
    solver.addConstraint(
      new kiwi.Constraint(
        new kiwi.Expression(width, padding.left, padding.right, -domSize.width),
        kiwi.Operator.Le
      )
    );
    // and similarly for the height
    solver.addConstraint(
      new kiwi.Constraint(
        new kiwi.Expression(
          height,
          padding.top,