| // Copyright (C) 2016 The Android Open Source Project |
| // |
| // 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. |
| (function() { |
| 'use strict'; |
| |
| Polymer({ |
| is: 'gr-diff-highlight', |
| |
| properties: { |
| comments: Object, |
| loggedIn: Boolean, |
| _cachedDiffBuilder: Object, |
| isAttached: Boolean, |
| }, |
| |
| listeners: { |
| 'comment-mouse-out': '_handleCommentMouseOut', |
| 'comment-mouse-over': '_handleCommentMouseOver', |
| 'create-comment': '_createComment', |
| }, |
| |
| observers: [ |
| '_enableSelectionObserver(loggedIn, isAttached)', |
| ], |
| |
| get diffBuilder() { |
| if (!this._cachedDiffBuilder) { |
| this._cachedDiffBuilder = |
| Polymer.dom(this).querySelector('gr-diff-builder'); |
| } |
| return this._cachedDiffBuilder; |
| }, |
| |
| _enableSelectionObserver: function(loggedIn, isAttached) { |
| if (loggedIn && isAttached) { |
| this.listen(document, 'selectionchange', '_handleSelectionChange'); |
| } else { |
| this.unlisten(document, 'selectionchange', '_handleSelectionChange'); |
| } |
| }, |
| |
| isRangeSelected: function() { |
| return !!this.$$('gr-selection-action-box'); |
| }, |
| |
| _handleSelectionChange: function() { |
| // Can't use up or down events to handle selection started and/or ended in |
| // in comment threads or outside of diff. |
| // Debounce removeActionBox to give it a chance to react to click/tap. |
| this._removeActionBoxDebounced(); |
| this.debounce('selectionChange', this._handleSelection, 200); |
| }, |
| |
| _handleCommentMouseOver: function(e) { |
| var comment = e.detail.comment; |
| if (!comment.range) { return; } |
| var lineEl = this.diffBuilder.getLineElByChild(e.target); |
| var side = this.diffBuilder.getSideByLineEl(lineEl); |
| var index = this._indexOfComment(side, comment); |
| if (index !== undefined) { |
| this.set(['comments', side, index, '__hovering'], true); |
| } |
| }, |
| |
| _handleCommentMouseOut: function(e) { |
| var comment = e.detail.comment; |
| if (!comment.range) { return; } |
| var lineEl = this.diffBuilder.getLineElByChild(e.target); |
| var side = this.diffBuilder.getSideByLineEl(lineEl); |
| var index = this._indexOfComment(side, comment); |
| if (index !== undefined) { |
| this.set(['comments', side, index, '__hovering'], false); |
| } |
| }, |
| |
| _indexOfComment: function(side, comment) { |
| var idProp = comment.id ? 'id' : '__draftID'; |
| for (var i = 0; i < this.comments[side].length; i++) { |
| if (comment[idProp] && |
| this.comments[side][i][idProp] === comment[idProp]) { |
| return i; |
| } |
| } |
| }, |
| |
| /** |
| * Convert DOM Range selection to concrete numbers (line, column, side). |
| * Moves range end if it's not inside td.content. |
| * Returns null if selection end is not valid (outside of diff). |
| * |
| * @param {Node} node td.content child |
| * @param {number} offset offset within node |
| * @return {{ |
| * node: Node, |
| * side: string, |
| * line: Number, |
| * column: Number |
| * }} |
| */ |
| _normalizeSelectionSide: function(node, offset) { |
| var column; |
| if (!this.contains(node)) { |
| return; |
| } |
| var lineEl = this.diffBuilder.getLineElByChild(node); |
| if (!lineEl) { |
| return; |
| } |
| var side = this.diffBuilder.getSideByLineEl(lineEl); |
| if (!side) { |
| return; |
| } |
| var line = this.diffBuilder.getLineNumberByChild(lineEl); |
| if (!line) { |
| return; |
| } |
| var contentText = this.diffBuilder.getContentByLineEl(lineEl); |
| if (!contentText) { |
| return; |
| } |
| var contentTd = contentText.parentElement; |
| if (!contentTd.contains(node)) { |
| node = contentText; |
| column = 0; |
| } else { |
| var thread = contentTd.querySelector('gr-diff-comment-thread'); |
| if (thread && thread.contains(node)) { |
| column = this._getLength(contentText); |
| node = contentText; |
| } else { |
| column = this._convertOffsetToColumn(node, offset); |
| } |
| } |
| |
| return { |
| node: node, |
| side: side, |
| line: line, |
| column: column, |
| }; |
| }, |
| |
| _handleSelection: function() { |
| var selection = window.getSelection(); |
| if (selection.rangeCount != 1) { |
| return; |
| } |
| var range = selection.getRangeAt(0); |
| if (range.collapsed) { |
| return; |
| } |
| var start = |
| this._normalizeSelectionSide(range.startContainer, range.startOffset); |
| if (!start) { |
| return; |
| } |
| var end = |
| this._normalizeSelectionSide(range.endContainer, range.endOffset); |
| if (!end) { |
| return; |
| } |
| if (start.side !== end.side || |
| end.line < start.line || |
| (start.line === end.line && start.column === end.column)) { |
| return; |
| } |
| |
| // TODO (viktard): Drop empty first and last lines from selection. |
| |
| var actionBox = document.createElement('gr-selection-action-box'); |
| Polymer.dom(this.root).appendChild(actionBox); |
| actionBox.range = { |
| startLine: start.line, |
| startChar: start.column, |
| endLine: end.line, |
| endChar: end.column, |
| }; |
| actionBox.side = start.side; |
| if (start.line === end.line) { |
| actionBox.placeAbove(range); |
| } else if (start.node instanceof Text) { |
| actionBox.placeAbove(start.node.splitText(start.column)); |
| start.node.parentElement.normalize(); // Undo splitText from above. |
| } else if (start.node.classList.contains('content') && |
| start.node.firstChild) { |
| actionBox.placeAbove(start.node.firstChild); |
| } else { |
| actionBox.placeAbove(start.node); |
| } |
| }, |
| |
| _createComment: function(e) { |
| this._removeActionBox(); |
| }, |
| |
| _removeActionBoxDebounced: function() { |
| this.debounce('removeActionBox', this._removeActionBox, 10); |
| }, |
| |
| _removeActionBox: function() { |
| var actionBox = this.$$('gr-selection-action-box'); |
| if (actionBox) { |
| Polymer.dom(this.root).removeChild(actionBox); |
| } |
| }, |
| |
| _convertOffsetToColumn: function(el, offset) { |
| if (el instanceof Element && el.classList.contains('content')) { |
| return offset; |
| } |
| while (el.previousSibling || |
| !el.parentElement.classList.contains('content')) { |
| if (el.previousSibling) { |
| el = el.previousSibling; |
| offset += this._getLength(el); |
| } else { |
| el = el.parentElement; |
| } |
| } |
| return offset; |
| }, |
| |
| /** |
| * Traverse Element from right to left, call callback for each node. |
| * Stops if callback returns true. |
| * |
| * @param {!Node} startNode |
| * @param {function(Node):boolean} callback |
| * @param {Object=} opt_flags If flags.left is true, traverse left. |
| */ |
| _traverseContentSiblings: function(startNode, callback, opt_flags) { |
| var travelLeft = opt_flags && opt_flags.left; |
| var node = startNode; |
| while (node) { |
| if (node instanceof Element && |
| node.tagName !== 'HL' && |
| node.tagName !== 'SPAN') { |
| break; |
| } |
| var nextNode = travelLeft ? node.previousSibling : node.nextSibling; |
| if (callback(node)) { |
| break; |
| } |
| node = nextNode; |
| } |
| }, |
| |
| /** |
| * Get length of a node. If the node is a content node, then only give the |
| * length of its .contentText child. |
| * |
| * @param {!Node} node |
| * @return {number} |
| */ |
| _getLength: function(node) { |
| if (node instanceof Element && node.classList.contains('content')) { |
| return this._getLength(node.querySelector('.contentText')); |
| } else { |
| return GrAnnotation.getLength(node); |
| } |
| }, |
| }); |
| })(); |
