/** * @license * Visual Blocks Editor * * Copyright 2014 Google Inc. * https://developers.google.com/blockly/ * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @fileoverview Object representing a workspace rendered as SVG. * @author fraser@google.com (Neil Fraser) */ 'use strict'; goog.provide('Blockly.WorkspaceSvg'); // TODO(scr): Fix circular dependencies //goog.require('Blockly.BlockSvg'); goog.require('Blockly.ConnectionDB'); goog.require('Blockly.constants'); goog.require('Blockly.Options'); goog.require('Blockly.ScrollbarPair'); goog.require('Blockly.Touch'); goog.require('Blockly.Trashcan'); goog.require('Blockly.Workspace'); goog.require('Blockly.Xml'); goog.require('Blockly.ZoomControls'); goog.require('goog.array'); goog.require('goog.dom'); goog.require('goog.math.Coordinate'); goog.require('goog.userAgent'); /** * Class for a workspace. This is an onscreen area with optional trashcan, * scrollbars, bubbles, and dragging. * @param {!Blockly.Options} options Dictionary of options. * @extends {Blockly.Workspace} * @constructor */ Blockly.WorkspaceSvg = function(options) { Blockly.WorkspaceSvg.superClass_.constructor.call(this, options); this.getMetrics = options.getMetrics || Blockly.WorkspaceSvg.getTopLevelWorkspaceMetrics_; this.setMetrics = options.setMetrics || Blockly.WorkspaceSvg.setTopLevelWorkspaceMetrics_; this.undo_stack = []; this.redo_stack = []; this.last_change_by_undo = false; this.save_undo_flag = true; Blockly.ConnectionDB.init(this); /** * Database of pre-loaded sounds. * @private * @const */ this.SOUNDS_ = Object.create(null); /** * List of currently highlighted blocks. * @type !Array. * @private */ this.highlightedBlocks_ = []; }; goog.inherits(Blockly.WorkspaceSvg, Blockly.Workspace); /** * A wrapper function called when a resize event occurs. You can pass the result to `unbindEvent_`. * @type {Array.} */ Blockly.WorkspaceSvg.prototype.resizeHandlerWrapper_ = null; /** * The render status of an SVG workspace. * Returns `true` for visible workspaces and `false` for non-visible, or headless, workspaces. * @type {boolean} */ Blockly.WorkspaceSvg.prototype.rendered = true; /** * Is this workspace the surface for a flyout? * @type {boolean} */ Blockly.WorkspaceSvg.prototype.isFlyout = false; /** * Is this workspace the surface for a mutator? * @type {boolean} * @package */ Blockly.WorkspaceSvg.prototype.isMutator = false; /** * Is this workspace currently being dragged around? * DRAG_NONE - No drag operation. * DRAG_BEGIN - Still inside the initial DRAG_RADIUS. * DRAG_FREE - Workspace has been dragged further than DRAG_RADIUS. * @private */ Blockly.WorkspaceSvg.prototype.dragMode_ = Blockly.DRAG_NONE; /** * Whether this workspace has resizes enabled. * Disable during batch operations for a performance improvement. * @type {boolean} * @private */ Blockly.WorkspaceSvg.prototype.resizesEnabled_ = true; /** * Current horizontal scrolling offset. * @type {number} */ Blockly.WorkspaceSvg.prototype.scrollX = 0; /** * Current vertical scrolling offset. * @type {number} */ Blockly.WorkspaceSvg.prototype.scrollY = 0; /** * Horizontal scroll value when scrolling started. * @type {number} */ Blockly.WorkspaceSvg.prototype.startScrollX = 0; /** * Vertical scroll value when scrolling started. * @type {number} */ Blockly.WorkspaceSvg.prototype.startScrollY = 0; /** * Distance from mouse to object being dragged. * @type {goog.math.Coordinate} * @private */ Blockly.WorkspaceSvg.prototype.dragDeltaXY_ = null; /** * Current scale. * @type {number} */ Blockly.WorkspaceSvg.prototype.scale = 1; /** * The workspace's trashcan (if any). * @type {Blockly.Trashcan} */ Blockly.WorkspaceSvg.prototype.trashcan = null; /** * This workspace's scrollbars, if they exist. * @type {Blockly.ScrollbarPair} */ Blockly.WorkspaceSvg.prototype.scrollbar = null; /** * * */ Blockly.WorkspaceSvg.prototype.alignment_vertical_spacing = 20; /** * Time that the last sound was played. * @type {Date} * @private */ Blockly.WorkspaceSvg.prototype.lastSound_ = null; /** * Last known position of the page scroll. * This is used to determine whether we have recalculated screen coordinate * stuff since the page scrolled. * @type {!goog.math.Coordinate} * @private */ Blockly.WorkspaceSvg.prototype.lastRecordedPageScroll_ = null; /** * Inverted screen CTM, for use in mouseToSvg. * @type {SVGMatrix} * @private */ Blockly.WorkspaceSvg.prototype.inverseScreenCTM_ = null; /** * Getter for the inverted screen CTM. * @return {SVGMatrix} The matrix to use in mouseToSvg */ Blockly.WorkspaceSvg.prototype.getInverseScreenCTM = function() { return this.inverseScreenCTM_; }; /** * Update the inverted screen CTM. */ Blockly.WorkspaceSvg.prototype.updateInverseScreenCTM = function() { var ctm = this.getParentSvg().getScreenCTM(); if (ctm) { this.inverseScreenCTM_ = ctm.inverse(); } }; /** * Save resize handler data so we can delete it later in dispose. * @param {!Array.} handler Data that can be passed to unbindEvent_. */ Blockly.WorkspaceSvg.prototype.setResizeHandlerWrapper = function(handler) { this.resizeHandlerWrapper_ = handler; }; /** * Create the workspace DOM elements. * @param {string=} opt_backgroundClass Either 'blocklyMainBackground' or * 'blocklyMutatorBackground'. * @return {!Element} The workspace's SVG group. */ Blockly.WorkspaceSvg.prototype.createDom = function(opt_backgroundClass) { /** * * * [Trashcan and/or flyout may go here] * * * [Scrollbars may go here] * * @type {SVGElement} */ this.svgGroup_ = Blockly.createSvgElement('g', {'class': 'blocklyWorkspace'}, null); if (opt_backgroundClass) { /** @type {SVGElement} */ this.svgBackground_ = Blockly.createSvgElement('rect', {'height': '100%', 'width': '100%', 'class': opt_backgroundClass}, this.svgGroup_); if (opt_backgroundClass == 'blocklyMainBackground') { this.svgBackground_.style.fill = 'url(#' + this.options.gridPattern.id + ')'; } } /** @type {SVGElement} */ this.svgBlockCanvas_ = Blockly.createSvgElement('g', {'class': 'blocklyBlockCanvas'}, this.svgGroup_, this); /** @type {SVGElement} */ this.svgBubbleCanvas_ = Blockly.createSvgElement('g', {'class': 'blocklyBubbleCanvas'}, this.svgGroup_, this); var bottom = Blockly.Scrollbar.scrollbarThickness; if (this.options.hasTrashcan) { bottom = this.addTrashcan_(bottom); } if (this.options.zoomOptions && this.options.zoomOptions.controls) { bottom = this.addZoomControls_(bottom); } if (!this.isFlyout) { Blockly.bindEventWithChecks_(this.svgGroup_, 'mousedown', this, this.onMouseDown_); var thisWorkspace = this; Blockly.bindEvent_(this.svgGroup_, 'touchstart', null, function(e) {Blockly.longStart_(e, thisWorkspace);}); if (this.options.zoomOptions && this.options.zoomOptions.wheel) { // Mouse-wheel. Blockly.bindEventWithChecks_(this.svgGroup_, 'wheel', this, this.onMouseWheel_); } } // Determine if there needs to be a category tree, or a simple list of // blocks. This cannot be changed later, since the UI is very different. if (this.options.hasCategories) { /** * @type {Blockly.Toolbox} * @private */ this.toolbox_ = new Blockly.Toolbox(this); } else if (this.options.languageTree) { this.addFlyout_(); } this.updateGridPattern_(); this.recordDeleteAreas(); return this.svgGroup_; }; /** * Dispose of this workspace. * Unlink from all DOM elements to prevent memory leaks. */ Blockly.WorkspaceSvg.prototype.dispose = function() { // Stop rerendering. this.rendered = false; Blockly.WorkspaceSvg.superClass_.dispose.call(this); if (this.svgGroup_) { goog.dom.removeNode(this.svgGroup_); this.svgGroup_ = null; } this.svgBlockCanvas_ = null; this.svgBubbleCanvas_ = null; if (this.toolbox_) { this.toolbox_.dispose(); this.toolbox_ = null; } if (this.flyout_) { this.flyout_.dispose(); this.flyout_ = null; } if (this.trashcan) { this.trashcan.dispose(); this.trashcan = null; } if (this.scrollbar) { this.scrollbar.dispose(); this.scrollbar = null; } if (this.zoomControls_) { this.zoomControls_.dispose(); this.zoomControls_ = null; } if (!this.options.parentWorkspace) { // Top-most workspace. Dispose of the div that the // svg is injected into (i.e. injectionDiv). goog.dom.removeNode(this.getParentSvg().parentNode); } if (this.resizeHandlerWrapper_) { Blockly.unbindEvent_(this.resizeHandlerWrapper_); this.resizeHandlerWrapper_ = null; } }; /** * Obtain a newly created block. * @param {?string} prototypeName Name of the language object containing * type-specific functions for this block. * @param {string=} opt_id Optional ID. Use this ID if provided, otherwise * create a new ID. * @return {!Blockly.BlockSvg} The created block. */ Blockly.WorkspaceSvg.prototype.newBlock = function(prototypeName, opt_id) { return new Blockly.BlockSvg(this, prototypeName, opt_id); }; /** * Add a trashcan. * @param {number} bottom Distance from workspace bottom to bottom of trashcan. * @return {number} Distance from workspace bottom to the top of trashcan. * @private */ Blockly.WorkspaceSvg.prototype.addTrashcan_ = function(bottom) { /** @type {Blockly.Trashcan} */ this.trashcan = new Blockly.Trashcan(this); var svgTrashcan = this.trashcan.createDom(); this.svgGroup_.insertBefore(svgTrashcan, this.svgBlockCanvas_); return this.trashcan.init(bottom); }; /** * Add zoom controls. * @param {number} bottom Distance from workspace bottom to bottom of controls. * @return {number} Distance from workspace bottom to the top of controls. * @private */ Blockly.WorkspaceSvg.prototype.addZoomControls_ = function(bottom) { /** @type {Blockly.ZoomControls} */ this.zoomControls_ = new Blockly.ZoomControls(this); var svgZoomControls = this.zoomControls_.createDom(); this.svgGroup_.appendChild(svgZoomControls); return this.zoomControls_.init(bottom); }; /** * Add a flyout. * @private */ Blockly.WorkspaceSvg.prototype.addFlyout_ = function() { var workspaceOptions = { disabledPatternId: this.options.disabledPatternId, parentWorkspace: this, RTL: this.RTL, oneBasedIndex: this.options.oneBasedIndex, horizontalLayout: this.horizontalLayout, toolboxPosition: this.options.toolboxPosition }; /** @type {Blockly.Flyout} */ this.flyout_ = new Blockly.Flyout(workspaceOptions); this.flyout_.autoClose = false; var svgFlyout = this.flyout_.createDom(); this.svgGroup_.insertBefore(svgFlyout, this.svgBlockCanvas_); }; /** * Update items that use screen coordinate calculations * because something has changed (e.g. scroll position, window size). * @private */ Blockly.WorkspaceSvg.prototype.updateScreenCalculations_ = function() { this.updateInverseScreenCTM(); this.recordDeleteAreas(); }; /** * If enabled, resize the parts of the workspace that change when the workspace * contents (e.g. block positions) change. This will also scroll the * workspace contents if needed. * @package */ Blockly.WorkspaceSvg.prototype.resizeContents = function() { if (!this.resizesEnabled_ || !this.rendered) { return; } if (this.scrollbar) { // TODO(picklesrus): Once rachel-fenichel's scrollbar refactoring // is complete, call the method that only resizes scrollbar // based on contents. this.scrollbar.resize(); } this.updateInverseScreenCTM(); }; /** * Resize and reposition all of the workspace chrome (toolbox, * trash, scrollbars etc.) * This should be called when something changes that * requires recalculating dimensions and positions of the * trash, zoom, toolbox, etc. (e.g. window resize). */ Blockly.WorkspaceSvg.prototype.resize = function() { if (this.toolbox_) { this.toolbox_.position(); } if (this.flyout_) { this.flyout_.position(); } if (this.trashcan) { this.trashcan.position(); } if (this.zoomControls_) { this.zoomControls_.position(); } if (this.scrollbar) { this.scrollbar.resize(); } this.updateScreenCalculations_(); }; /** * Resizes and repositions workspace chrome if the page has a new * scroll position. * @package */ Blockly.WorkspaceSvg.prototype.updateScreenCalculationsIfScrolled = function() { /* eslint-disable indent */ var currScroll = goog.dom.getDocumentScroll(); if (!goog.math.Coordinate.equals(this.lastRecordedPageScroll_, currScroll)) { this.lastRecordedPageScroll_ = currScroll; this.updateScreenCalculations_(); } }; /* eslint-enable indent */ /** * Get the SVG element that forms the drawing surface. * @return {!Element} SVG element. */ Blockly.WorkspaceSvg.prototype.getCanvas = function() { return this.svgBlockCanvas_; }; /** * Get the SVG element that forms the bubble surface. * @return {!SVGGElement} SVG element. */ Blockly.WorkspaceSvg.prototype.getBubbleCanvas = function() { return this.svgBubbleCanvas_; }; /** * Get the SVG element that contains this workspace. * @return {!Element} SVG element. */ Blockly.WorkspaceSvg.prototype.getParentSvg = function() { if (this.cachedParentSvg_) { return this.cachedParentSvg_; } var element = this.svgGroup_; while (element) { if (element.tagName == 'svg') { this.cachedParentSvg_ = element; return element; } element = element.parentNode; } return null; }; /** * Translate this workspace to new coordinates. * @param {number} x Horizontal translation. * @param {number} y Vertical translation. */ Blockly.WorkspaceSvg.prototype.translate = function(x, y) { var translation = 'translate(' + x + ',' + y + ') ' + 'scale(' + this.scale + ')'; this.svgBlockCanvas_.setAttribute('transform', translation); this.svgBubbleCanvas_.setAttribute('transform', translation); }; /** * Align the blocks in the workspace vertically. */ Blockly.WorkspaceSvg.prototype.align = function() { var blocks = this.getTopBlocks(false); var y = 0; for (var i = 0; i < blocks.length; i++){ // Get a block var block = blocks[i]; var properties = block.getRelativeToSurfaceXY(); block.moveBy(-properties.x, -properties.y+y); // Move it by its height plus a buffer y += block.getHeightWidth().height + this.alignment_vertical_spacing; } } /* Blockly.WorkspaceSvg.prototype.maximum_undos = 20; Blockly.WorkspaceSvg.prototype.enableUndo = function() { this.saveUndo(); var _instance = this; this.addChangeListener(function() {_instance.saveUndo()}); } Blockly.WorkspaceSvg.prototype.saveUndo = function() { if (this.save_undo_flag) { if (this.undo_stack.length >= this.maximum_undos) { this.undo_stack.shift(); } var current = Blockly.Xml.domToText(Blockly.Xml.workspaceToDom(this)); this.undo_stack.push(current); this.redo_stack = Array(); this.last_change_by_undo = false; } else { this.save_undo_flag = true; } }; Blockly.WorkspaceSvg.prototype.undo = function() { if (this.undo_stack.length > 0) { this.save_undo_flag = false; var state = this.undo_stack.pop(); this.redo_stack.push(state); if (!this.last_change_by_undo && this.undo_stack.length > 0) { state = this.undo_stack.pop(); this.redo_stack.push(state); } this.clear(); var xml = Blockly.Xml.textToDom(state); Blockly.Xml.domToWorkspace(this, xml); this.last_change_by_undo = true; } } Blockly.WorkspaceSvg.prototype.redo = function() { if (this.redo_stack.length > 0) { this.save_undo_flag = false; var state = this.redo_stack.pop(); this.undo_stack.push(state); if (this.redo_stack.length == 1) { state = this.redo_stack.pop(); this.undo_stack.push(state); } else { this.clear(); var xml = Blockly.Xml.textToDom(state); Blockly.Xml.domToWorkspace(this, xml); } } if (this.redo_stack.length == 0) { this.last_change_by_undo = false; } } */ /** * Returns the horizontal offset of the workspace. * Intended for LTR/RTL compatibility in XML. * @return {number} Width. */ Blockly.WorkspaceSvg.prototype.getWidth = function() { var metrics = this.getMetrics(); return metrics ? metrics.viewWidth / this.scale : 0; }; /** * Toggles the visibility of the workspace. * Currently only intended for main workspace. * @param {boolean} isVisible True if workspace should be visible. */ Blockly.WorkspaceSvg.prototype.setVisible = function(isVisible) { this.getParentSvg().style.display = isVisible ? 'block' : 'none'; if (this.toolbox_) { // Currently does not support toolboxes in mutators. this.toolbox_.HtmlDiv.style.display = isVisible ? 'block' : 'none'; } if (isVisible) { this.render(); if (this.toolbox_) { this.toolbox_.position(); } } else { Blockly.hideChaff(true); } }; /** * Render all blocks in workspace. */ Blockly.WorkspaceSvg.prototype.render = function() { // Generate list of all blocks. var blocks = this.getAllBlocks(); // Render each block. for (var i = blocks.length - 1; i >= 0; i--) { blocks[i].render(false); } }; /** * Was used back when block highlighting (for execution) and block selection * (for editing) were the same thing. * Any calls of this function can be deleted. * @deprecated October 2016 */ Blockly.WorkspaceSvg.prototype.traceOn = function() { console.warn('Deprecated call to traceOn, delete this.'); }; /** * Highlight or unhighlight a block in the workspace. * @param {?string} id ID of block to highlight/unhighlight, * or null for no block (used to unhighlight all blocks). * @param {boolean=} opt_state If undefined, highlight specified block and * automatically unhighlight all others. If true or false, manually * highlight/unhighlight the specified block. */ Blockly.WorkspaceSvg.prototype.highlightBlock = function(id, opt_state) { if (opt_state === undefined) { // Unhighlight all blocks. for (var i = 0, block; block = this.highlightedBlocks_[i]; i++) { block.setHighlighted(false); } this.highlightedBlocks_.length = 0; } // Highlight/unhighlight the specified block. var block = id ? this.getBlockById(id) : null; if (block) { var state = (opt_state === undefined) || opt_state; // Using Set here would be great, but at the cost of IE10 support. if (!state) { goog.array.remove(this.highlightedBlocks_, block); } else if (this.highlightedBlocks_.indexOf(block) == -1) { this.highlightedBlocks_.push(block); } block.setHighlighted(state); } }; /** * Paste the provided block onto the workspace. * @param {!Element} xmlBlock XML block element. */ Blockly.WorkspaceSvg.prototype.paste = function(xmlBlock) { if (!this.rendered || xmlBlock.getElementsByTagName('block').length >= this.remainingCapacity()) { return; } Blockly.terminateDrag_(); // Dragging while pasting? No. Blockly.Events.disable(); try { var block = Blockly.Xml.domToBlock(xmlBlock, this); // Move the duplicate to original position. var blockX = parseInt(xmlBlock.getAttribute('x'), 10); var blockY = parseInt(xmlBlock.getAttribute('y'), 10); if (!isNaN(blockX) && !isNaN(blockY)) { if (this.RTL) { blockX = -blockX; } // Offset block until not clobbering another block and not in connection // distance with neighbouring blocks. do { var collide = false; var allBlocks = this.getAllBlocks(); for (var i = 0, otherBlock; otherBlock = allBlocks[i]; i++) { var otherXY = otherBlock.getRelativeToSurfaceXY(); if (Math.abs(blockX - otherXY.x) <= 1 && Math.abs(blockY - otherXY.y) <= 1) { collide = true; break; } } if (!collide) { // Check for blocks in snap range to any of its connections. var connections = block.getConnections_(false); for (var i = 0, connection; connection = connections[i]; i++) { var neighbour = connection.closest(Blockly.SNAP_RADIUS, new goog.math.Coordinate(blockX, blockY)); if (neighbour.connection) { collide = true; break; } } } if (collide) { if (this.RTL) { blockX -= Blockly.SNAP_RADIUS; } else { blockX += Blockly.SNAP_RADIUS; } blockY += Blockly.SNAP_RADIUS * 2; } } while (collide); block.moveBy(blockX, blockY); } } finally { Blockly.Events.enable(); } if (Blockly.Events.isEnabled() && !block.isShadow()) { Blockly.Events.fire(new Blockly.Events.Create(block)); } block.select(); }; /** * Create a new variable with the given name. Update the flyout to show the new * variable immediately. * TODO: #468 * @param {string} name The new variable's name. */ Blockly.WorkspaceSvg.prototype.createVariable = function(name) { Blockly.WorkspaceSvg.superClass_.createVariable.call(this, name); // Don't refresh the toolbox if there's a drag in progress. if (this.toolbox_ && this.toolbox_.flyout_ && !Blockly.Flyout.startFlyout_) { this.toolbox_.refreshSelection(); } }; /** * Make a list of all the delete areas for this workspace. */ Blockly.WorkspaceSvg.prototype.recordDeleteAreas = function() { if (this.trashcan) { this.deleteAreaTrash_ = this.trashcan.getClientRect(); } else { this.deleteAreaTrash_ = null; } if (this.flyout_) { this.deleteAreaToolbox_ = this.flyout_.getClientRect(); } else if (this.toolbox_) { this.deleteAreaToolbox_ = this.toolbox_.getClientRect(); } else { this.deleteAreaToolbox_ = null; } }; /** * Is the mouse event over a delete area (toolbox or non-closing flyout)? * Opens or closes the trashcan and sets the cursor as a side effect. * @param {!Event} e Mouse move event. * @return {boolean} True if event is in a delete area. */ Blockly.WorkspaceSvg.prototype.isDeleteArea = function(e) { var xy = new goog.math.Coordinate(e.clientX, e.clientY); if (this.deleteAreaTrash_) { if (this.deleteAreaTrash_.contains(xy)) { this.trashcan.setOpen_(true); Blockly.Css.setCursor(Blockly.Css.Cursor.DELETE); return true; } this.trashcan.setOpen_(false); } if (this.deleteAreaToolbox_) { if (this.deleteAreaToolbox_.contains(xy)) { Blockly.Css.setCursor(Blockly.Css.Cursor.DELETE); return true; } } Blockly.Css.setCursor(Blockly.Css.Cursor.CLOSED); return false; }; /** * Handle a mouse-down on SVG drawing surface. * @param {!Event} e Mouse down event. * @private */ Blockly.WorkspaceSvg.prototype.onMouseDown_ = function(e) { this.markFocused(); if (Blockly.isTargetInput_(e)) { Blockly.Touch.clearTouchIdentifier(); return; } Blockly.terminateDrag_(); // In case mouse-up event was lost. Blockly.hideChaff(); var isTargetWorkspace = e.target && e.target.nodeName && (e.target.nodeName.toLowerCase() == 'svg' || e.target == this.svgBackground_); if (isTargetWorkspace && Blockly.selected && !this.options.readOnly) { // Clicking on the document clears the selection. Blockly.selected.unselect(); } if (Blockly.isRightButton(e)) { // Right-click. this.showContextMenu_(e); // Since this was a click, not a drag, end the gesture immediately. Blockly.Touch.clearTouchIdentifier(); } else if (this.scrollbar) { this.dragMode_ = Blockly.DRAG_BEGIN; // Record the current mouse position. this.startDragMouseX = e.clientX; this.startDragMouseY = e.clientY; this.startDragMetrics = this.getMetrics(); this.startScrollX = this.scrollX; this.startScrollY = this.scrollY; // If this is a touch event then bind to the mouseup so workspace drag mode // is turned off and double move events are not performed on a block. // See comment in inject.js Blockly.init_ as to why mouseup events are // bound to the document instead of the SVG's surface. if ('mouseup' in Blockly.Touch.TOUCH_MAP) { Blockly.Touch.onTouchUpWrapper_ = Blockly.Touch.onTouchUpWrapper_ || []; Blockly.Touch.onTouchUpWrapper_ = Blockly.Touch.onTouchUpWrapper_.concat( Blockly.bindEventWithChecks_(document, 'mouseup', null, Blockly.onMouseUp_)); } Blockly.onMouseMoveWrapper_ = Blockly.onMouseMoveWrapper_ || []; Blockly.onMouseMoveWrapper_ = Blockly.onMouseMoveWrapper_.concat( Blockly.bindEventWithChecks_(document, 'mousemove', null, Blockly.onMouseMove_)); } else { // It was a click, but the workspace isn't draggable. Blockly.Touch.clearTouchIdentifier(); } // This event has been handled. No need to bubble up to the document. e.stopPropagation(); e.preventDefault(); }; /** * Start tracking a drag of an object on this workspace. * @param {!Event} e Mouse down event. * @param {!goog.math.Coordinate} xy Starting location of object. */ Blockly.WorkspaceSvg.prototype.startDrag = function(e, xy) { // Record the starting offset between the bubble's location and the mouse. var point = Blockly.mouseToSvg(e, this.getParentSvg(), this.getInverseScreenCTM()); // Fix scale of mouse event. point.x /= this.scale; point.y /= this.scale; this.dragDeltaXY_ = goog.math.Coordinate.difference(xy, point); }; /** * Track a drag of an object on this workspace. * @param {!Event} e Mouse move event. * @return {!goog.math.Coordinate} New location of object. */ Blockly.WorkspaceSvg.prototype.moveDrag = function(e) { var point = Blockly.mouseToSvg(e, this.getParentSvg(), this.getInverseScreenCTM()); // Fix scale of mouse event. point.x /= this.scale; point.y /= this.scale; return goog.math.Coordinate.sum(this.dragDeltaXY_, point); }; /** * Is the user currently dragging a block or scrolling the flyout/workspace? * @return {boolean} True if currently dragging or scrolling. */ Blockly.WorkspaceSvg.prototype.isDragging = function() { return Blockly.dragMode_ == Blockly.DRAG_FREE || (Blockly.Flyout.startFlyout_ && Blockly.Flyout.startFlyout_.dragMode_ == Blockly.DRAG_FREE) || this.dragMode_ == Blockly.DRAG_FREE; }; /** * Handle a mouse-wheel on SVG drawing surface. * @param {!Event} e Mouse wheel event. * @private */ Blockly.WorkspaceSvg.prototype.onMouseWheel_ = function(e) { // TODO: Remove terminateDrag and compensate for coordinate skew during zoom. Blockly.terminateDrag_(); var delta = e.deltaY > 0 ? -1 : 1; var position = Blockly.mouseToSvg(e, this.getParentSvg(), this.getInverseScreenCTM()); this.zoom(position.x, position.y, delta); e.preventDefault(); }; /** * Calculate the bounding box for the blocks on the workspace. * * @return {Object} Contains the position and size of the bounding box * containing the blocks on the workspace. */ Blockly.WorkspaceSvg.prototype.getBlocksBoundingBox = function() { var topBlocks = this.getTopBlocks(false); // There are no blocks, return empty rectangle. if (!topBlocks.length) { return {x: 0, y: 0, width: 0, height: 0}; } // Initialize boundary using the first block. var boundary = topBlocks[0].getBoundingRectangle(); // Start at 1 since the 0th block was used for initialization for (var i = 1; i < topBlocks.length; i++) { var blockBoundary = topBlocks[i].getBoundingRectangle(); if (blockBoundary.topLeft.x < boundary.topLeft.x) { boundary.topLeft.x = blockBoundary.topLeft.x; } if (blockBoundary.bottomRight.x > boundary.bottomRight.x) { boundary.bottomRight.x = blockBoundary.bottomRight.x; } if (blockBoundary.topLeft.y < boundary.topLeft.y) { boundary.topLeft.y = blockBoundary.topLeft.y; } if (blockBoundary.bottomRight.y > boundary.bottomRight.y) { boundary.bottomRight.y = blockBoundary.bottomRight.y; } } return { x: boundary.topLeft.x, y: boundary.topLeft.y, width: boundary.bottomRight.x - boundary.topLeft.x, height: boundary.bottomRight.y - boundary.topLeft.y }; }; /** * Clean up the workspace by ordering all the blocks in a column. */ Blockly.WorkspaceSvg.prototype.cleanUp = function() { Blockly.Events.setGroup(true); var topBlocks = this.getTopBlocks(true); var cursorY = 0; for (var i = 0, block; block = topBlocks[i]; i++) { var xy = block.getRelativeToSurfaceXY(); block.moveBy(-xy.x, cursorY - xy.y); block.snapToGrid(); cursorY = block.getRelativeToSurfaceXY().y + block.getHeightWidth().height + Blockly.BlockSvg.MIN_BLOCK_Y; } Blockly.Events.setGroup(false); // Fire an event to allow scrollbars to resize. this.resizeContents(); }; /** * Copy all the blocks on the current workspace. * @public */ Blockly.WorkspaceSvg.prototype.copyAll = function() { Blockly.hideChaff(); var xmlBlocks = Blockly.Xml.workspaceToDom(this); if (Blockly.dragMode_ != Blockly.DRAG_FREE) { Blockly.Xml.deleteNext(xmlBlocks); } // Encode start position in XML. //var xy = block.getRelativeToSurfaceXY(); //xmlBlock.setAttribute('x', block.RTL ? -xy.x : xy.x); //xmlBlock.setAttribute('y', xy.y); Blockly.clipboardXml_ = xmlBlocks; Blockly.clipboardSource_ = this; localStorage.setItem('_blockly_clipboardXml_', Blockly.Xml.domToText(xmlBlocks)); } /** * Pastea all blocks on the current workspace. * @public */ Blockly.WorkspaceSvg.prototype.pasteFromClipboard = function() { var blocks; if (localStorage.getItem('_blockly_clipboardXml_')) { var domText = localStorage.getItem('_blockly_clipboardXml_'); blocks = Blockly.Xml.textToDom(domText); } else if (Blockly.clipboardXml_) { blocks = Blockly.clipboardXml_ } Blockly.Events.setGroup(true); if (blocks.tagName !== undefined && blocks.tagName.toLowerCase() == "xml") { for (var i = 0, len = blocks.children.length; i < len; i=i+1) { Blockly.mainWorkspace.paste(blocks.children[i]); } this.align(); } else { Blockly.mainWorkspace.paste(blocks); } Blockly.Events.setGroup(false); } /** * Show the context menu for the workspace. * @param {!Event} e Mouse event. * @private */ Blockly.WorkspaceSvg.prototype.showContextMenu_ = function(e) { if (this.options.readOnly || this.isFlyout) { return; } var menuOptions = []; var topBlocks = this.getTopBlocks(true); var eventGroup = Blockly.genUid(); // Options to undo/redo previous action. var undoOption = {}; undoOption.text = Blockly.Msg.UNDO; undoOption.enabled = this.undoStack_.length > 0; undoOption.callback = this.undo.bind(this, false); menuOptions.push(undoOption); var redoOption = {}; redoOption.text = Blockly.Msg.REDO; redoOption.enabled = this.redoStack_.length > 0; redoOption.callback = this.undo.bind(this, true); menuOptions.push(redoOption); // Options to copy all/paste previous action. var copyAllOption = {}; copyAllOption.text = "Copy All Blocks"; copyAllOption.enabled = true; copyAllOption.callback = this.copyAll.bind(this); menuOptions.push(copyAllOption); var pasteOption = {}; pasteOption.text = "Paste Blocks"; var ls_xml = localStorage.getItem('_blockly_clipboardXml_'), cp_xml = Blockly.clipboardXml_; pasteOption.enabled = false; if (ls_xml) { cp_xml = ls_xml; } if (cp_xml) { if (typeof cp_xml == "string") { cp_xml = Blockly.Xml.textToDom(cp_xml); } if (cp_xml.tagName != undefined) { if (cp_xml.tagName.toLowerCase() == "xml") { pasteOption.enabled = cp_xml.children; } else { pasteOption.enabled = cp_xml.tagName.toLowerCase() == "block"; } } } pasteOption.callback = this.pasteFromClipboard.bind(this); menuOptions.push(pasteOption); // Option to clean up blocks. if (this.scrollbar) { var cleanOption = {}; cleanOption.text = Blockly.Msg.CLEAN_UP; cleanOption.enabled = topBlocks.length > 1; cleanOption.callback = this.cleanUp.bind(this); //menuOptions.push(cleanOption); } // Add a little animation to collapsing and expanding. var DELAY = 10; if (this.options.collapse) { var hasCollapsedBlocks = false; var hasExpandedBlocks = false; for (var i = 0; i < topBlocks.length; i++) { var block = topBlocks[i]; while (block) { if (block.isCollapsed()) { hasCollapsedBlocks = true; } else { hasExpandedBlocks = true; } block = block.getNextBlock(); } } /** * Option to collapse or expand top blocks. * @param {boolean} shouldCollapse Whether a block should collapse. * @private */ var toggleOption = function(shouldCollapse) { var ms = 0; for (var i = 0; i < topBlocks.length; i++) { var block = topBlocks[i]; while (block) { setTimeout(block.setCollapsed.bind(block, shouldCollapse), ms); block = block.getNextBlock(); ms += DELAY; } } }; // Option to collapse top blocks. var collapseOption = {enabled: hasExpandedBlocks}; collapseOption.text = Blockly.Msg.COLLAPSE_ALL; collapseOption.callback = function() { toggleOption(true); }; menuOptions.push(collapseOption); // Option to expand top blocks. var expandOption = {enabled: hasCollapsedBlocks}; expandOption.text = Blockly.Msg.EXPAND_ALL; expandOption.callback = function() { toggleOption(false); }; menuOptions.push(expandOption); } var _instance = this; // Option to align the blocks menuOptions.push({enabled: true, text: "Align Blocks", callback: function() { _instance.align(); }}); /* menuOptions.push({enabled: true, text: "Undo", callback: function() { _instance.undo(); }}); menuOptions.push({enabled: true, text: "Redo", callback: function() { _instance.redo(); }}); */ /* // Option to clear all the blocks. var clearOption = {enabled: true}; clearOption.text = "Clear Blocks"; var _instance = this; clearOption.callback = function() { _instance.clear(); }; menuOptions.push(clearOption); */ // Option to delete all blocks. // Count the number of blocks that are deletable. var deleteList = []; function addDeletableBlocks(block) { if (block.isDeletable()) { deleteList = deleteList.concat(block.getDescendants()); } else { var children = block.getChildren(); for (var i = 0; i < children.length; i++) { addDeletableBlocks(children[i]); } } } for (var i = 0; i < topBlocks.length; i++) { addDeletableBlocks(topBlocks[i]); } function deleteNext() { Blockly.Events.setGroup(eventGroup); var block = deleteList.shift(); if (block) { if (block.workspace) { block.dispose(false, true); setTimeout(deleteNext, DELAY); } else { deleteNext(); } } Blockly.Events.setGroup(false); } var deleteOption = { text: deleteList.length == 1 ? Blockly.Msg.DELETE_BLOCK : Blockly.Msg.DELETE_X_BLOCKS.replace('%1', String(deleteList.length)), enabled: deleteList.length > 0, callback: function() { if (deleteList.length < 2 ) { deleteNext(); } else { Blockly.confirm(Blockly.Msg.DELETE_ALL_BLOCKS. replace('%1', deleteList.length), function(ok) { if (ok) { deleteNext(); } }); } } }; menuOptions.push(deleteOption); if (Blockly.captureDialog_ != undefined) { var captureOption = { text: 'Screenshot', enabled: true, callback: function() { Blockly.captureDialog_(); } }; menuOptions.push(captureOption); } Blockly.ContextMenu.show(e, menuOptions, this.RTL); }; /** * Load an audio file. Cache it, ready for instantaneous playing. * @param {!Array.} filenames List of file types in decreasing order of * preference (i.e. increasing size). E.g. ['media/go.mp3', 'media/go.wav'] * Filenames include path from Blockly's root. File extensions matter. * @param {string} name Name of sound. * @private */ Blockly.WorkspaceSvg.prototype.loadAudio_ = function(filenames, name) { if (!filenames.length) { return; } try { var audioTest = new window['Audio'](); } catch (e) { // No browser support for Audio. // IE can throw an error even if the Audio object exists. return; } var sound; for (var i = 0; i < filenames.length; i++) { var filename = filenames[i]; var ext = filename.match(/\.(\w+)$/); if (ext && audioTest.canPlayType('audio/' + ext[1])) { // Found an audio format we can play. sound = new window['Audio'](filename); break; } } if (sound && sound.play) { this.SOUNDS_[name] = sound; } }; /** * Preload all the audio files so that they play quickly when asked for. * @private */ Blockly.WorkspaceSvg.prototype.preloadAudio_ = function() { for (var name in this.SOUNDS_) { var sound = this.SOUNDS_[name]; sound.volume = .01; sound.play(); sound.pause(); // iOS can only process one sound at a time. Trying to load more than one // corrupts the earlier ones. Just load one and leave the others uncached. if (goog.userAgent.IPAD || goog.userAgent.IPHONE) { break; } } }; /** * Play a named sound at specified volume. If volume is not specified, * use full volume (1). * @param {string} name Name of sound. * @param {number=} opt_volume Volume of sound (0-1). */ Blockly.WorkspaceSvg.prototype.playAudio = function(name, opt_volume) { var sound = this.SOUNDS_[name]; if (sound) { // Don't play one sound on top of another. var now = new Date; if (now - this.lastSound_ < Blockly.SOUND_LIMIT) { return; } this.lastSound_ = now; var mySound; var ie9 = goog.userAgent.DOCUMENT_MODE && goog.userAgent.DOCUMENT_MODE === 9; if (ie9 || goog.userAgent.IPAD || goog.userAgent.ANDROID) { // Creating a new audio node causes lag in IE9, Android and iPad. Android // and IE9 refetch the file from the server, iPad uses a singleton audio // node which must be deleted and recreated for each new audio tag. mySound = sound; } else { mySound = sound.cloneNode(); } mySound.volume = (opt_volume === undefined ? 1 : opt_volume); mySound.play(); } else if (this.options.parentWorkspace) { // Maybe a workspace on a lower level knows about this sound. this.options.parentWorkspace.playAudio(name, opt_volume); } }; /** * Modify the block tree on the existing toolbox. * @param {Node|string} tree DOM tree of blocks, or text representation of same. */ Blockly.WorkspaceSvg.prototype.updateToolbox = function(tree) { tree = Blockly.Options.parseToolboxTree(tree); if (!tree) { if (this.options.languageTree) { throw 'Can\'t nullify an existing toolbox.'; } return; // No change (null to null). } if (!this.options.languageTree) { throw 'Existing toolbox is null. Can\'t create new toolbox.'; } if (tree.getElementsByTagName('category').length) { if (!this.toolbox_) { throw 'Existing toolbox has no categories. Can\'t change mode.'; } this.options.languageTree = tree; this.toolbox_.populate_(tree); this.toolbox_.addColour_(); } else { if (!this.flyout_) { throw 'Existing toolbox has categories. Can\'t change mode.'; } this.options.languageTree = tree; this.flyout_.show(tree.childNodes); } }; /** * Mark this workspace as the currently focused main workspace. */ Blockly.WorkspaceSvg.prototype.markFocused = function() { if (this.options.parentWorkspace) { this.options.parentWorkspace.markFocused(); } else { Blockly.mainWorkspace = this; } }; /** * Zooming the blocks centered in (x, y) coordinate with zooming in or out. * @param {number} x X coordinate of center. * @param {number} y Y coordinate of center. * @param {number} type Type of zooming (-1 zooming out and 1 zooming in). */ Blockly.WorkspaceSvg.prototype.zoom = function(x, y, type) { var speed = this.options.zoomOptions.scaleSpeed; var metrics = this.getMetrics(); var center = this.getParentSvg().createSVGPoint(); center.x = x; center.y = y; center = center.matrixTransform(this.getCanvas().getCTM().inverse()); x = center.x; y = center.y; var canvas = this.getCanvas(); // Scale factor. var scaleChange = (type == 1) ? speed : 1 / speed; // Clamp scale within valid range. var newScale = this.scale * scaleChange; if (newScale > this.options.zoomOptions.maxScale) { scaleChange = this.options.zoomOptions.maxScale / this.scale; } else if (newScale < this.options.zoomOptions.minScale) { scaleChange = this.options.zoomOptions.minScale / this.scale; } if (this.scale == newScale) { return; // No change in zoom. } if (this.scrollbar) { var matrix = canvas.getCTM() .translate(x * (1 - scaleChange), y * (1 - scaleChange)) .scale(scaleChange); // newScale and matrix.a should be identical (within a rounding error). this.scrollX = matrix.e - metrics.absoluteLeft; this.scrollY = matrix.f - metrics.absoluteTop; } this.setScale(newScale); }; /** * Zooming the blocks centered in the center of view with zooming in or out. * @param {number} type Type of zooming (-1 zooming out and 1 zooming in). */ Blockly.WorkspaceSvg.prototype.zoomCenter = function(type) { var metrics = this.getMetrics(); var x = metrics.viewWidth / 2; var y = metrics.viewHeight / 2; this.zoom(x, y, type); }; /** * Zoom the blocks to fit in the workspace if possible. */ Blockly.WorkspaceSvg.prototype.zoomToFit = function() { var metrics = this.getMetrics(); var blocksBox = this.getBlocksBoundingBox(); var blocksWidth = blocksBox.width; var blocksHeight = blocksBox.height; if (!blocksWidth) { return; // Prevents zooming to infinity. } var workspaceWidth = metrics.viewWidth; var workspaceHeight = metrics.viewHeight; if (this.flyout_) { workspaceWidth -= this.flyout_.width_; } if (!this.scrollbar) { // Orgin point of 0,0 is fixed, blocks will not scroll to center. blocksWidth += metrics.contentLeft; blocksHeight += metrics.contentTop; } var ratioX = workspaceWidth / blocksWidth; var ratioY = workspaceHeight / blocksHeight; this.setScale(Math.min(ratioX, ratioY)); this.scrollCenter(); }; /** * Center the workspace. */ Blockly.WorkspaceSvg.prototype.scrollCenter = function() { if (!this.scrollbar) { // Can't center a non-scrolling workspace. return; } var metrics = this.getMetrics(); var x = (metrics.contentWidth - metrics.viewWidth) / 2; if (this.flyout_) { x -= this.flyout_.width_ / 2; } var y = (metrics.contentHeight - metrics.viewHeight) / 2; this.scrollbar.set(x, y); }; /** * Set the workspace's zoom factor. * @param {number} newScale Zoom factor. */ Blockly.WorkspaceSvg.prototype.setScale = function(newScale) { if (this.options.zoomOptions.maxScale && newScale > this.options.zoomOptions.maxScale) { newScale = this.options.zoomOptions.maxScale; } else if (this.options.zoomOptions.minScale && newScale < this.options.zoomOptions.minScale) { newScale = this.options.zoomOptions.minScale; } this.scale = newScale; this.updateGridPattern_(); if (this.scrollbar) { this.scrollbar.resize(); } else { this.translate(this.scrollX, this.scrollY); } Blockly.hideChaff(false); if (this.flyout_) { // No toolbox, resize flyout. this.flyout_.reflow(); } }; /** * Updates the grid pattern. * @private */ Blockly.WorkspaceSvg.prototype.updateGridPattern_ = function() { if (!this.options.gridPattern) { return; // No grid. } // MSIE freaks if it sees a 0x0 pattern, so set empty patterns to 100x100. var safeSpacing = (this.options.gridOptions['spacing'] * this.scale) || 100; this.options.gridPattern.setAttribute('width', safeSpacing); this.options.gridPattern.setAttribute('height', safeSpacing); var half = Math.floor(this.options.gridOptions['spacing'] / 2) + 0.5; var start = half - this.options.gridOptions['length'] / 2; var end = half + this.options.gridOptions['length'] / 2; var line1 = this.options.gridPattern.firstChild; var line2 = line1 && line1.nextSibling; half *= this.scale; start *= this.scale; end *= this.scale; if (line1) { line1.setAttribute('stroke-width', this.scale); line1.setAttribute('x1', start); line1.setAttribute('y1', half); line1.setAttribute('x2', end); line1.setAttribute('y2', half); } if (line2) { line2.setAttribute('stroke-width', this.scale); line2.setAttribute('x1', half); line2.setAttribute('y1', start); line2.setAttribute('x2', half); line2.setAttribute('y2', end); } }; /** * Return an object with all the metrics required to size scrollbars for a * top level workspace. The following properties are computed: * .viewHeight: Height of the visible rectangle, * .viewWidth: Width of the visible rectangle, * .contentHeight: Height of the contents, * .contentWidth: Width of the content, * .viewTop: Offset of top edge of visible rectangle from parent, * .viewLeft: Offset of left edge of visible rectangle from parent, * .contentTop: Offset of the top-most content from the y=0 coordinate, * .contentLeft: Offset of the left-most content from the x=0 coordinate. * .absoluteTop: Top-edge of view. * .absoluteLeft: Left-edge of view. * .toolboxWidth: Width of toolbox, if it exists. Otherwise zero. * .toolboxHeight: Height of toolbox, if it exists. Otherwise zero. * .flyoutWidth: Width of the flyout if it is always open. Otherwise zero. * .flyoutHeight: Height of flyout if it is always open. Otherwise zero. * .toolboxPosition: Top, bottom, left or right. * @return {!Object} Contains size and position metrics of a top level * workspace. * @private * @this Blockly.WorkspaceSvg */ Blockly.WorkspaceSvg.getTopLevelWorkspaceMetrics_ = function() { var svgSize = Blockly.svgSize(this.getParentSvg()); if (this.toolbox_) { if (this.toolboxPosition == Blockly.TOOLBOX_AT_TOP || this.toolboxPosition == Blockly.TOOLBOX_AT_BOTTOM) { svgSize.height -= this.toolbox_.getHeight(); } else if (this.toolboxPosition == Blockly.TOOLBOX_AT_LEFT || this.toolboxPosition == Blockly.TOOLBOX_AT_RIGHT) { svgSize.width -= this.toolbox_.getWidth(); } } // Set the margin to match the flyout's margin so that the workspace does // not jump as blocks are added. var MARGIN = Blockly.Flyout.prototype.CORNER_RADIUS - 1; var viewWidth = svgSize.width - MARGIN; var viewHeight = svgSize.height - MARGIN; var blockBox = this.getBlocksBoundingBox(); // Fix scale. var contentWidth = blockBox.width * this.scale; var contentHeight = blockBox.height * this.scale; var contentX = blockBox.x * this.scale; var contentY = blockBox.y * this.scale; if (this.scrollbar) { // Add a border around the content that is at least half a screenful wide. // Ensure border is wide enough that blocks can scroll over entire screen. var leftEdge = Math.min(contentX - viewWidth / 2, contentX + contentWidth - viewWidth); var rightEdge = Math.max(contentX + contentWidth + viewWidth / 2, contentX + viewWidth); var topEdge = Math.min(contentY - viewHeight / 2, contentY + contentHeight - viewHeight); var bottomEdge = Math.max(contentY + contentHeight + viewHeight / 2, contentY + viewHeight); } else { var leftEdge = blockBox.x; var rightEdge = leftEdge + blockBox.width; var topEdge = blockBox.y; var bottomEdge = topEdge + blockBox.height; } var absoluteLeft = 0; if (this.toolbox_ && this.toolboxPosition == Blockly.TOOLBOX_AT_LEFT) { absoluteLeft = this.toolbox_.getWidth(); } var absoluteTop = 0; if (this.toolbox_ && this.toolboxPosition == Blockly.TOOLBOX_AT_TOP) { absoluteTop = this.toolbox_.getHeight(); } var metrics = { viewHeight: svgSize.height, viewWidth: svgSize.width, contentHeight: bottomEdge - topEdge, contentWidth: rightEdge - leftEdge, viewTop: -this.scrollY, viewLeft: -this.scrollX, contentTop: topEdge, contentLeft: leftEdge, absoluteTop: absoluteTop, absoluteLeft: absoluteLeft, toolboxWidth: this.toolbox_ ? this.toolbox_.getWidth() : 0, toolboxHeight: this.toolbox_ ? this.toolbox_.getHeight() : 0, flyoutWidth: this.flyout_ ? this.flyout_.getWidth() : 0, flyoutHeight: this.flyout_ ? this.flyout_.getHeight() : 0, toolboxPosition: this.toolboxPosition }; return metrics; }; /** * Sets the X/Y translations of a top level workspace to match the scrollbars. * @param {!Object} xyRatio Contains an x and/or y property which is a float * between 0 and 1 specifying the degree of scrolling. * @private * @this Blockly.WorkspaceSvg */ Blockly.WorkspaceSvg.setTopLevelWorkspaceMetrics_ = function(xyRatio) { if (!this.scrollbar) { throw 'Attempt to set top level workspace scroll without scrollbars.'; } var metrics = this.getMetrics(); if (goog.isNumber(xyRatio.x)) { this.scrollX = -metrics.contentWidth * xyRatio.x - metrics.contentLeft; } if (goog.isNumber(xyRatio.y)) { this.scrollY = -metrics.contentHeight * xyRatio.y - metrics.contentTop; } var x = this.scrollX + metrics.absoluteLeft; var y = this.scrollY + metrics.absoluteTop; this.translate(x, y); if (this.options.gridPattern) { this.options.gridPattern.setAttribute('x', x); this.options.gridPattern.setAttribute('y', y); if (goog.userAgent.IE) { // IE doesn't notice that the x/y offsets have changed. Force an update. this.updateGridPattern_(); } } }; /** * Update whether this workspace has resizes enabled. * If enabled, workspace will resize when appropriate. * If disabled, workspace will not resize until re-enabled. * Use to avoid resizing during a batch operation, for performance. * @param {boolean} enabled Whether resizes should be enabled. */ Blockly.WorkspaceSvg.prototype.setResizesEnabled = function(enabled) { var reenabled = (!this.resizesEnabled_ && enabled); this.resizesEnabled_ = enabled; if (reenabled) { // Newly enabled. Trigger a resize. this.resizeContents(); } }; /** * Dispose of all blocks in workspace, with an optimization to prevent resizes. */ Blockly.WorkspaceSvg.prototype.clear = function() { this.setResizesEnabled(false); Blockly.WorkspaceSvg.superClass_.clear.call(this); this.setResizesEnabled(true); }; // Export symbols that would otherwise be renamed by Closure compiler. Blockly.WorkspaceSvg.prototype['setVisible'] = Blockly.WorkspaceSvg.prototype.setVisible;