mirror of
https://github.com/google/blockly.git
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439 lines
12 KiB
JavaScript
439 lines
12 KiB
JavaScript
/**
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* @license
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* Copyright 2011 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @fileoverview Object representing a code comment.
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* @author fraser@google.com (Neil Fraser)
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*/
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'use strict';
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goog.provide('Blockly.Comment');
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goog.require('Blockly.Bubble');
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goog.require('Blockly.Css');
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goog.require('Blockly.Events');
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goog.require('Blockly.Events.BlockChange');
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goog.require('Blockly.Events.Ui');
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goog.require('Blockly.Icon');
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goog.require('Blockly.utils.deprecation');
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goog.require('Blockly.utils.dom');
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goog.require('Blockly.utils.object');
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goog.require('Blockly.utils.userAgent');
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goog.require('Blockly.Warning');
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/**
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* Class for a comment.
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* @param {!Blockly.Block} block The block associated with this comment.
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* @extends {Blockly.Icon}
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* @constructor
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*/
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Blockly.Comment = function(block) {
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Blockly.Comment.superClass_.constructor.call(this, block);
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/**
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* The model for this comment.
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* @type {!Blockly.Block.CommentModel}
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* @private
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*/
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this.model_ = block.commentModel;
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// If someone creates the comment directly instead of calling
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// block.setCommentText we want to make sure the text is non-null;
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this.model_.text = this.model_.text || '';
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/**
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* The model's text value at the start of an edit.
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* Used to tell if an event should be fired at the end of an edit.
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* @type {?string}
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* @private
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*/
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this.cachedText_ = '';
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/**
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* Mouse up event data.
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* @type {?Blockly.EventData}
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* @private
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*/
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this.onMouseUpWrapper_ = null;
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/**
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* Wheel event data.
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* @type {?Blockly.EventData}
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* @private
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*/
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this.onWheelWrapper_ = null;
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/**
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* Change event data.
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* @type {?Blockly.EventData}
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* @private
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*/
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this.onChangeWrapper_ = null;
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/**
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* Input event data.
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* @type {?Blockly.EventData}
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* @private
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*/
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this.onInputWrapper_ = null;
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this.createIcon();
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};
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Blockly.utils.object.inherits(Blockly.Comment, Blockly.Icon);
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/**
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* Draw the comment icon.
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* @param {!Element} group The icon group.
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* @protected
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*/
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Blockly.Comment.prototype.drawIcon_ = function(group) {
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// Circle.
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Blockly.utils.dom.createSvgElement(
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Blockly.utils.dom.SvgElementType.CIRCLE,
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{'class': 'blocklyIconShape', 'r': '8', 'cx': '8', 'cy': '8'},
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group);
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// Can't use a real '?' text character since different browsers and operating
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// systems render it differently.
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// Body of question mark.
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Blockly.utils.dom.createSvgElement(
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Blockly.utils.dom.SvgElementType.PATH,
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{
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'class': 'blocklyIconSymbol',
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'd': 'm6.8,10h2c0.003,-0.617 0.271,-0.962 0.633,-1.266 2.875,-2.405' +
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'0.607,-5.534 -3.765,-3.874v1.7c3.12,-1.657 3.698,0.118 2.336,1.25' +
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'-1.201,0.998 -1.201,1.528 -1.204,2.19z'},
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group);
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// Dot of question mark.
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Blockly.utils.dom.createSvgElement(
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Blockly.utils.dom.SvgElementType.RECT,
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{
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'class': 'blocklyIconSymbol',
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'x': '6.8',
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'y': '10.78',
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'height': '2',
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'width': '2'
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},
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group);
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};
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/**
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* Create the editor for the comment's bubble.
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* @return {!SVGElement} The top-level node of the editor.
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* @private
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*/
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Blockly.Comment.prototype.createEditor_ = function() {
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/* Create the editor. Here's the markup that will be generated in
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* editable mode:
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<foreignObject x="8" y="8" width="164" height="164">
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<body xmlns="http://www.w3.org/1999/xhtml" class="blocklyMinimalBody">
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<textarea xmlns="http://www.w3.org/1999/xhtml"
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class="blocklyCommentTextarea"
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style="height: 164px; width: 164px;"></textarea>
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</body>
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</foreignObject>
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* For non-editable mode see Warning.textToDom_.
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*/
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this.foreignObject_ = Blockly.utils.dom.createSvgElement(
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Blockly.utils.dom.SvgElementType.FOREIGNOBJECT,
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{'x': Blockly.Bubble.BORDER_WIDTH, 'y': Blockly.Bubble.BORDER_WIDTH},
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null);
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var body = document.createElementNS(Blockly.utils.dom.HTML_NS, 'body');
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body.setAttribute('xmlns', Blockly.utils.dom.HTML_NS);
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body.className = 'blocklyMinimalBody';
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this.textarea_ = document.createElementNS(
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Blockly.utils.dom.HTML_NS, 'textarea');
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var textarea = this.textarea_;
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textarea.className = 'blocklyCommentTextarea';
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textarea.setAttribute('dir', this.block_.RTL ? 'RTL' : 'LTR');
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textarea.value = this.model_.text;
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this.resizeTextarea_();
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body.appendChild(textarea);
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this.foreignObject_.appendChild(body);
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// Ideally this would be hooked to the focus event for the comment.
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// However doing so in Firefox swallows the cursor for unknown reasons.
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// So this is hooked to mouseup instead. No big deal.
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this.onMouseUpWrapper_ = Blockly.bindEventWithChecks_(
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textarea, 'mouseup', this, this.startEdit_, true, true);
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// Don't zoom with mousewheel.
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this.onWheelWrapper_ = Blockly.bindEventWithChecks_(
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textarea, 'wheel', this, function(e) {
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e.stopPropagation();
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});
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this.onChangeWrapper_ = Blockly.bindEventWithChecks_(
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textarea, 'change', this, function(_e) {
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if (this.cachedText_ != this.model_.text) {
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Blockly.Events.fire(new Blockly.Events.BlockChange(
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this.block_, 'comment', null, this.cachedText_, this.model_.text));
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}
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});
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this.onInputWrapper_ = Blockly.bindEventWithChecks_(
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textarea, 'input', this, function(_e) {
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this.model_.text = textarea.value;
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});
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setTimeout(textarea.focus.bind(textarea), 0);
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return this.foreignObject_;
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};
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/**
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* Add or remove editability of the comment.
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* @override
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*/
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Blockly.Comment.prototype.updateEditable = function() {
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Blockly.Comment.superClass_.updateEditable.call(this);
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if (this.isVisible()) {
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// Recreate the bubble with the correct UI.
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this.disposeBubble_();
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this.createBubble_();
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}
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};
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/**
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* Callback function triggered when the bubble has resized.
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* Resize the text area accordingly.
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* @private
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*/
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Blockly.Comment.prototype.onBubbleResize_ = function() {
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if (!this.isVisible()) {
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return;
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}
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this.model_.size = this.bubble_.getBubbleSize();
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this.resizeTextarea_();
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};
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/**
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* Resizes the text area to match the size defined on the model (which is
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* the size of the bubble).
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* @private
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*/
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Blockly.Comment.prototype.resizeTextarea_ = function() {
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var size = this.model_.size;
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var doubleBorderWidth = 2 * Blockly.Bubble.BORDER_WIDTH;
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var widthMinusBorder = size.width - doubleBorderWidth;
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var heightMinusBorder = size.height - doubleBorderWidth;
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this.foreignObject_.setAttribute('width', widthMinusBorder);
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this.foreignObject_.setAttribute('height', heightMinusBorder);
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this.textarea_.style.width = (widthMinusBorder - 4) + 'px';
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this.textarea_.style.height = (heightMinusBorder - 4) + 'px';
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};
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/**
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* Show or hide the comment bubble.
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* @param {boolean} visible True if the bubble should be visible.
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*/
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Blockly.Comment.prototype.setVisible = function(visible) {
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if (visible == this.isVisible()) {
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return;
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}
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Blockly.Events.fire(
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new Blockly.Events.Ui(this.block_, 'commentOpen', !visible, visible));
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this.model_.pinned = visible;
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if (visible) {
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this.createBubble_();
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} else {
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this.disposeBubble_();
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}
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};
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/**
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* Show the bubble. Handles deciding if it should be editable or not.
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* @private
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*/
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Blockly.Comment.prototype.createBubble_ = function() {
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if (!this.block_.isEditable() || Blockly.utils.userAgent.IE) {
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// Steal the code from warnings to make an uneditable text bubble.
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// MSIE does not support foreignobject; textareas are impossible.
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// https://docs.microsoft.com/en-us/openspecs/ie_standards/ms-svg/56e6e04c-7c8c-44dd-8100-bd745ee42034
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// Always treat comments in IE as uneditable.
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this.createNonEditableBubble_();
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} else {
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this.createEditableBubble_();
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}
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};
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/**
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* Show an editable bubble.
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* @private
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*/
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Blockly.Comment.prototype.createEditableBubble_ = function() {
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this.bubble_ = new Blockly.Bubble(
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/** @type {!Blockly.WorkspaceSvg} */ (this.block_.workspace),
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this.createEditor_(), this.block_.pathObject.svgPath,
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/** @type {!Blockly.utils.Coordinate} */ (this.iconXY_),
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this.model_.size.width, this.model_.size.height);
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// Expose this comment's block's ID on its top-level SVG group.
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this.bubble_.setSvgId(this.block_.id);
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this.bubble_.registerResizeEvent(this.onBubbleResize_.bind(this));
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this.applyColour();
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};
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/**
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* Show a non-editable bubble.
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* @private
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* @suppress {checkTypes} Suppress `this` type mismatch.
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*/
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Blockly.Comment.prototype.createNonEditableBubble_ = function() {
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// TODO (#2917): It would be great if the comment could support line breaks.
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Blockly.Warning.prototype.createBubble.call(this);
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};
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/**
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* Dispose of the bubble.
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* @private
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* @suppress {checkTypes} Suppress `this` type mismatch.
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*/
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Blockly.Comment.prototype.disposeBubble_ = function() {
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if (this.paragraphElement_) {
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// We're using the warning UI so we have to let it dispose.
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Blockly.Warning.prototype.disposeBubble.call(this);
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return;
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}
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if (this.onMouseUpWrapper_) {
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Blockly.unbindEvent_(this.onMouseUpWrapper_);
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this.onMouseUpWrapper_ = null;
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}
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if (this.onWheelWrapper_) {
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Blockly.unbindEvent_(this.onWheelWrapper_);
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this.onWheelWrapper_ = null;
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}
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if (this.onChangeWrapper_) {
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Blockly.unbindEvent_(this.onChangeWrapper_);
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this.onChangeWrapper_ = null;
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}
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if (this.onInputWrapper_) {
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Blockly.unbindEvent_(this.onInputWrapper_);
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this.onInputWrapper_ = null;
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}
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this.bubble_.dispose();
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this.bubble_ = null;
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this.textarea_ = null;
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this.foreignObject_ = null;
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};
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/**
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* Callback fired when an edit starts.
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*
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* Bring the comment to the top of the stack when clicked on. Also cache the
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* current text so it can be used to fire a change event.
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* @param {!Event} _e Mouse up event.
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* @private
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*/
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Blockly.Comment.prototype.startEdit_ = function(_e) {
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if (this.bubble_.promote()) {
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// Since the act of moving this node within the DOM causes a loss of focus,
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// we need to reapply the focus.
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this.textarea_.focus();
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}
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this.cachedText_ = this.model_.text;
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};
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/**
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* Get the dimensions of this comment's bubble.
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* @return {Blockly.utils.Size} Object with width and height properties.
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*/
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Blockly.Comment.prototype.getBubbleSize = function() {
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return this.model_.size;
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};
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/**
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* Size this comment's bubble.
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* @param {number} width Width of the bubble.
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* @param {number} height Height of the bubble.
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*/
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Blockly.Comment.prototype.setBubbleSize = function(width, height) {
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if (this.bubble_) {
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this.bubble_.setBubbleSize(width, height);
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} else {
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this.model_.size.width = width;
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this.model_.size.height = height;
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}
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};
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/**
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* Returns this comment's text.
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* @return {string} Comment text.
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* @deprecated August 2019 Use block.getCommentText() instead.
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*/
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Blockly.Comment.prototype.getText = function() {
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Blockly.utils.deprecation.warn(
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'Comment.prototype.getText',
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'August 2019',
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'December 2020',
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'block.getCommentText');
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return this.model_.text || '';
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};
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/**
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* Set this comment's text.
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*
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* If you want to receive a comment change event, then this should not be called
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* directly. Instead call block.setCommentText();
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* @param {string} text Comment text.
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* @deprecated August 2019 Use block.setCommentText() instead.
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*/
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Blockly.Comment.prototype.setText = function(text) {
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Blockly.utils.deprecation.warn(
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'Comment.prototype.setText',
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'August 2019',
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'December 2020',
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'block.setCommentText');
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if (this.model_.text == text) {
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return;
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}
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this.model_.text = text;
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this.updateText();
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};
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/**
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* Update the comment's view to match the model.
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* @package
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*/
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Blockly.Comment.prototype.updateText = function() {
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if (this.textarea_) {
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this.textarea_.value = this.model_.text;
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} else if (this.paragraphElement_) {
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// Non-Editable mode.
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// TODO (#2917): If 2917 gets added this will probably need to be updated.
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this.paragraphElement_.firstChild.textContent = this.model_.text;
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}
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};
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/**
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* Dispose of this comment.
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*
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* If you want to receive a comment "delete" event (newValue: null), then this
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* should not be called directly. Instead call block.setCommentText(null);
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*/
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Blockly.Comment.prototype.dispose = function() {
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this.block_.comment = null;
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Blockly.Icon.prototype.dispose.call(this);
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};
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/**
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* CSS for block comment. See css.js for use.
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*/
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Blockly.Css.register([
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/* eslint-disable indent */
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'.blocklyCommentTextarea {',
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'background-color: #fef49c;',
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'border: 0;',
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'outline: 0;',
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'margin: 0;',
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'padding: 3px;',
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'resize: none;',
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'display: block;',
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'overflow: hidden;',
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'}'
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/* eslint-enable indent */
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]);
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