Method updateCollapsed

packages/blockly/core/block_svg.ts:569–611

* Makes sure that when the block is collapsed, it is rendered correctly * for that state.

()

   * for that state.
   */
  private updateCollapsed() {
    const collapsed = this.isCollapsed();
    const collapsedInputName = constants.COLLAPSED_INPUT_NAME;
    const collapsedFieldName = constants.COLLAPSED_FIELD_NAME;

    for (let i = 0, input; (input = this.inputList[i]); i++) {
      if (input.name !== collapsedInputName) {
        input.setVisible(!collapsed);
      }
    }

    for (const icon of this.getIcons()) {
      icon.updateCollapsed();
    }

    if (!collapsed) {
      this.updateDisabled();
      this.removeInput(collapsedInputName);
      dom.removeClass(this.svgGroup, 'blocklyCollapsed');
      this.setWarningText(null, BlockSvg.COLLAPSED_WARNING_ID);
      return;
    }

    dom.addClass(this.svgGroup, 'blocklyCollapsed');
    if (this.childHasWarning()) {
      this.setWarningText(
        Msg['COLLAPSED_WARNINGS_WARNING'],
        BlockSvg.COLLAPSED_WARNING_ID,
      );
    }

    const text = this.toString(internalConstants.COLLAPSE_CHARS);
    const field = this.getField(collapsedFieldName);
    if (field) {
      field.setValue(text);
      return;
    }
    const input =
      this.getInput(collapsedInputName) ||
      this.appendDummyInput(collapsedInputName);
    input.appendField(new FieldLabel(text), collapsedFieldName);
    this.recomputeAriaContext();
  }

  /**
   * Handle a pointerdown on an SVG block.