/** * @license * Visual Blocks Editor * * Copyright 2011 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 code comment. * @author fraser@google.com (Neil Fraser) */ 'use strict'; goog.provide('Blockly.Comment'); goog.require('Blockly.Bubble'); goog.require('Blockly.Events'); goog.require('Blockly.Events.BlockChange'); goog.require('Blockly.Events.Ui'); goog.require('Blockly.Icon'); goog.require('Blockly.utils.dom'); goog.require('Blockly.utils.object'); goog.require('Blockly.utils.userAgent'); /** * Class for a comment. * @param {!Blockly.Block} block The block associated with this comment. * @extends {Blockly.Icon} * @constructor */ Blockly.Comment = function(block) { Blockly.Comment.superClass_.constructor.call(this, block); /** * The model for this comment. * @type {!Blockly.Block.CommentModel} * @private */ this.model_ = block.commentModel; // If someone creates the comment directly instead of calling // block.setCommentText we want to make sure the text is non-null; this.model_.text = this.model_.text || ''; /** * The model's text value at the start of an edit. * Used to tell if an event should be fired at the end of an edit. * @type {?string} * @private */ this.cachedText_ = ''; this.createIcon(); }; Blockly.utils.object.inherits(Blockly.Comment, Blockly.Icon); /** * Draw the comment icon. * @param {!Element} group The icon group. * @private */ Blockly.Comment.prototype.drawIcon_ = function(group) { // Circle. Blockly.utils.dom.createSvgElement('circle', {'class': 'blocklyIconShape', 'r': '8', 'cx': '8', 'cy': '8'}, group); // Can't use a real '?' text character since different browsers and operating // systems render it differently. // Body of question mark. Blockly.utils.dom.createSvgElement('path', { 'class': 'blocklyIconSymbol', 'd': 'm6.8,10h2c0.003,-0.617 0.271,-0.962 0.633,-1.266 2.875,-2.405' + '0.607,-5.534 -3.765,-3.874v1.7c3.12,-1.657 3.698,0.118 2.336,1.25' + '-1.201,0.998 -1.201,1.528 -1.204,2.19z'}, group); // Dot of question mark. Blockly.utils.dom.createSvgElement('rect', { 'class': 'blocklyIconSymbol', 'x': '6.8', 'y': '10.78', 'height': '2', 'width': '2' }, group); }; /** * Create the editor for the comment's bubble. * @return {!Element} The top-level node of the editor. * @private */ Blockly.Comment.prototype.createEditor_ = function() { /* Create the editor. Here's the markup that will be generated in * editable mode: * For non-editable mode see Warning.textToDom_. */ this.foreignObject_ = Blockly.utils.dom.createSvgElement('foreignObject', {'x': Blockly.Bubble.BORDER_WIDTH, 'y': Blockly.Bubble.BORDER_WIDTH}, null); var body = document.createElementNS(Blockly.utils.dom.HTML_NS, 'body'); body.setAttribute('xmlns', Blockly.utils.dom.HTML_NS); body.className = 'blocklyMinimalBody'; this.textarea_ = document.createElementNS( Blockly.utils.dom.HTML_NS, 'textarea'); var textarea = this.textarea_; textarea.className = 'blocklyCommentTextarea'; textarea.setAttribute('dir', this.block_.RTL ? 'RTL' : 'LTR'); textarea.value = this.model_.text; this.resizeTextarea_(); body.appendChild(textarea); this.foreignObject_.appendChild(body); // Ideally this would be hooked to the focus event for the comment. // However doing so in Firefox swallows the cursor for unknown reasons. // So this is hooked to mouseup instead. No big deal. Blockly.bindEventWithChecks_(textarea, 'mouseup', this, this.startEdit_, true, true); // Don't zoom with mousewheel. Blockly.bindEventWithChecks_(textarea, 'wheel', this, function(e) { e.stopPropagation(); }); Blockly.bindEventWithChecks_(textarea, 'change', this, function(_e) { if (this.cachedText_ != this.model_.text) { Blockly.Events.fire(new Blockly.Events.BlockChange( this.block_, 'comment', null, this.cachedText_, this.model_.text)); } }); Blockly.bindEventWithChecks_(textarea, 'input', this, function(_e) { this.model_.text = textarea.value; }); setTimeout(textarea.focus.bind(textarea), 0); return this.foreignObject_; }; /** * Add or remove editability of the comment. * @override */ Blockly.Comment.prototype.updateEditable = function() { Blockly.Comment.superClass_.updateEditable.call(this); if (this.isVisible()) { // Recreate the bubble with the correct UI. this.disposeBubble_(); this.createBubble_(); } }; /** * Callback function triggered when the bubble has resized. * Resize the text area accordingly. * @private */ Blockly.Comment.prototype.onBubbleResize_ = function() { if (!this.isVisible()) { return; } this.model_.size = this.bubble_.getBubbleSize(); this.resizeTextarea_(); }; /** * Resizes the text area to match the size defined on the model (which is * the size of the bubble). * @private */ Blockly.Comment.prototype.resizeTextarea_ = function() { var size = this.model_.size; var doubleBorderWidth = 2 * Blockly.Bubble.BORDER_WIDTH; var widthMinusBorder = size.width - doubleBorderWidth; var heightMinusBorder = size.height - doubleBorderWidth; this.foreignObject_.setAttribute('width', widthMinusBorder); this.foreignObject_.setAttribute('height', heightMinusBorder); this.textarea_.style.width = (widthMinusBorder - 4) + 'px'; this.textarea_.style.height = (heightMinusBorder - 4) + 'px'; }; /** * Show or hide the comment bubble. * @param {boolean} visible True if the bubble should be visible. */ Blockly.Comment.prototype.setVisible = function(visible) { if (visible == this.isVisible()) { return; } Blockly.Events.fire( new Blockly.Events.Ui(this.block_, 'commentOpen', !visible, visible)); this.model_.pinned = visible; if (visible) { this.createBubble_(); } else { this.disposeBubble_(); } }; /** * Show the bubble. Handles deciding if it should be editable or not. * @private */ Blockly.Comment.prototype.createBubble_ = function() { if (!this.block_.isEditable() || Blockly.utils.userAgent.IE) { // Steal the code from warnings to make an uneditable text bubble. // MSIE does not support foreignobject; textareas are impossible. // https://docs.microsoft.com/en-us/openspecs/ie_standards/ms-svg/56e6e04c-7c8c-44dd-8100-bd745ee42034 // Always treat comments in IE as uneditable. this.createNonEditableBubble_(); } else { this.createEditableBubble_(); } }; /** * Show an editable bubble. * @private */ Blockly.Comment.prototype.createEditableBubble_ = function() { this.bubble_ = new Blockly.Bubble( /** @type {!Blockly.WorkspaceSvg} */ (this.block_.workspace), this.createEditor_(), this.block_.svgPath_, this.iconXY_, this.model_.size.width, this.model_.size.height); // Expose this comment's block's ID on its top-level SVG group. this.bubble_.setSvgId(this.block_.id); this.bubble_.registerResizeEvent(this.onBubbleResize_.bind(this)); this.updateColour(); }; /** * Show a non-editable bubble. * @private */ Blockly.Comment.prototype.createNonEditableBubble_ = function() { // TODO (#2917): It would be great if the comment could support line breaks. Blockly.Warning.prototype.createBubble.call(this); }; /** * Dispose of the bubble. * @private */ Blockly.Comment.prototype.disposeBubble_ = function() { if (this.paragraphElement_) { // We're using the warning UI so we have to let it dispose. Blockly.Warning.prototype.disposeBubble.call(this); return; } this.bubble_.dispose(); this.bubble_ = null; this.textarea_ = null; this.foreignObject_ = null; }; /** * Callback fired when an edit starts. * * Bring the comment to the top of the stack when clicked on. Also cache the * current text so it can be used to fire a change event. * @param {!Event} _e Mouse up event. * @private */ Blockly.Comment.prototype.startEdit_ = function(_e) { if (this.bubble_.promote_()) { // Since the act of moving this node within the DOM causes a loss of focus, // we need to reapply the focus. this.textarea_.focus(); } this.cachedText_ = this.model_.text; }; /** * Get the dimensions of this comment's bubble. * @return {Blockly.utils.Size} Object with width and height properties. */ Blockly.Comment.prototype.getBubbleSize = function() { return this.model_.size; }; /** * Size this comment's bubble. * @param {number} width Width of the bubble. * @param {number} height Height of the bubble. */ Blockly.Comment.prototype.setBubbleSize = function(width, height) { if (this.bubble_) { this.bubble_.setBubbleSize(width, height); } else { this.model_.size.width = width; this.model_.size.height = height; } }; /** * Returns this comment's text. * @return {string} Comment text. * @deprecated August 2019 Use block.getCommentText() instead. */ Blockly.Comment.prototype.getText = function() { return this.model_.text || ''; }; /** * Set this comment's text. * * If you want to receive a comment change event, then this should not be called * directly. Instead call block.setCommentText(); * @param {string} text Comment text. * @deprecated August 2019 Use block.setCommentText() instead. */ Blockly.Comment.prototype.setText = function(text) { if (this.model_.text == text) { return; } this.model_.text = text; this.updateText(); }; /** * Update the comment's view to match the model. * @package */ Blockly.Comment.prototype.updateText = function() { if (this.textarea_) { this.textarea_.value = this.model_.text; } else if (this.paragraphElement_) { // Non-Editable mode. // TODO (#2917): If 2917 gets added this will probably need to be updated. this.paragraphElement_.firstChild.textContent = this.model_.text; } }; /** * Dispose of this comment. * * If you want to receive a comment "delete" event (newValue: null), then this * should not be called directly. Instead call block.setCommentText(null); */ Blockly.Comment.prototype.dispose = function() { this.block_.comment = null; Blockly.Icon.prototype.dispose.call(this); };