piskel/src/js/controller/ToolController.js

(function () {
  var ns = $.namespace('pskl.controller');

  ns.ToolController = function () {
    var toDescriptor = function (id, shortcut, instance) {
      return {id:id, shortcut:shortcut, instance:instance};
    };

    this.tools = [
      toDescriptor('simplePen', 'P', new pskl.tools.drawing.SimplePen()),
      toDescriptor('verticalMirrorPen', 'V', new pskl.tools.drawing.VerticalMirrorPen()),
      toDescriptor('paintBucket', 'B', new pskl.tools.drawing.PaintBucket()),
      toDescriptor('colorSwap', 'A', new pskl.tools.drawing.ColorSwap()),
      toDescriptor('eraser', 'E', new pskl.tools.drawing.Eraser()),
      toDescriptor('stroke', 'L', new pskl.tools.drawing.Stroke()),
      toDescriptor('rectangle', 'R', new pskl.tools.drawing.Rectangle()),
      toDescriptor('circle', 'C', new pskl.tools.drawing.Circle()),
      toDescriptor('move', 'M', new pskl.tools.drawing.Move()),
      toDescriptor('rectangleSelect', 'S', new pskl.tools.drawing.selection.RectangleSelect()),
      toDescriptor('lassoSelect', 'H', new pskl.tools.drawing.selection.LassoSelect()),
      toDescriptor('shapeSelect', 'Z', new pskl.tools.drawing.selection.ShapeSelect()),
      toDescriptor('lighten', 'U', new pskl.tools.drawing.Lighten()),
      toDescriptor('dithering', 'T', new pskl.tools.drawing.DitheringTool()),
      toDescriptor('colorPicker', 'O', new pskl.tools.drawing.ColorPicker())
    ];

    this.toolIconRenderer = new pskl.tools.IconMarkupRenderer();
  };

  /**
   * @public
   */
  ns.ToolController.prototype.init = function() {
    this.createToolsDom_();
    this.addKeyboardShortcuts_();

    // Initialize tool:
    // Set SimplePen as default selected tool:
    this.selectTool_(this.tools[0]);
    // Activate listener on tool panel:
    $('#tool-section').mousedown($.proxy(this.onToolIconClicked_, this));

    $.subscribe(Events.SELECT_TOOL, this.onSelectToolEvent_.bind(this));
  };

  /**
   * @private
   */
  ns.ToolController.prototype.activateToolOnStage_ = function(tool) {
    var stage = $('body');
    var previousSelectedToolClass = stage.data('selected-tool-class');
    if (previousSelectedToolClass) {
      stage.removeClass(previousSelectedToolClass);
      stage.removeClass(pskl.tools.drawing.Move.TOOL_ID);
    }
    stage.addClass(tool.instance.toolId);
    stage.data('selected-tool-class', tool.instance.toolId);
  };

  ns.ToolController.prototype.onSelectToolEvent_ = function(event, toolId) {
    var tool = this.getToolById_(toolId);
    if (tool) {
      this.selectTool_(tool);
    }
  };

  /**
   * @private
   */
  ns.ToolController.prototype.selectTool_ = function(tool) {
    this.currentSelectedTool = tool;
    this.activateToolOnStage_(this.currentSelectedTool);

    var selectedToolElement = $('#tool-section .tool-icon.selected');
    var toolElement = $('[data-tool-id=' + tool.instance.toolId + ']');

    selectedToolElement.removeClass('selected');
    toolElement.addClass('selected');

    $.publish(Events.TOOL_SELECTED, [tool.instance]);
  };

  /**
   * @private
   */
  ns.ToolController.prototype.onToolIconClicked_ = function(evt) {
    var target = $(evt.target);
    var clickedTool = target.closest('.tool-icon');

    if (clickedTool.length) {
      var toolId = clickedTool.data().toolId;
      var tool = this.getToolById_(toolId);
      if (tool) {
        this.selectTool_(tool);
      }
    }
  };

  ns.ToolController.prototype.onKeyboardShortcut_ = function(charkey) {
    for (var i = 0 ; i < this.tools.length ; i++) {
      var tool = this.tools[i];
      if (tool.shortcut.toLowerCase() === charkey.toLowerCase()) {
        this.selectTool_(tool);
      }
    }
  };

  ns.ToolController.prototype.getToolById_ = function (toolId) {
    return pskl.utils.Array.find(this.tools, function (tool) {
      return tool.instance.toolId == toolId;
    });
  };

  /**
   * @private
   */
  ns.ToolController.prototype.createToolsDom_ = function() {
    var html = '';
    for (var i = 0 ; i < this.tools.length ; i++) {
      var tool = this.tools[i];
      html += this.toolIconRenderer.render(tool.instance, tool.shortcut);
    }
    $('#tools-container').html(html);
  };

  ns.ToolController.prototype.addKeyboardShortcuts_ = function () {
    for (var i = 0 ; i < this.tools.length ; i++) {
      pskl.app.shortcutService.addShortcut(this.tools[i].shortcut, this.onKeyboardShortcut_.bind(this));
    }
  };
})();