| /** |
| * @license |
| * 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, |
| /** |
| * querySelector can return null, so needs to be nullable. |
| * |
| * @type {?HTMLElement} |
| * */ |
| _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(loggedIn, isAttached) { |
| if (loggedIn && isAttached) { |
| this.listen(document, 'selectionchange', '_handleSelectionChange'); |
| } else { |
| this.unlisten(document, 'selectionchange', '_handleSelectionChange'); |
| } |
| }, |
| |
| isRangeSelected() { |
| return !!this.$$('gr-selection-action-box'); |
| }, |
| |
| _handleSelectionChange() { |
| // 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(e) { |
| const comment = e.detail.comment; |
| if (!comment.range) { return; } |
| const lineEl = this.diffBuilder.getLineElByChild(e.target); |
| const side = this.diffBuilder.getSideByLineEl(lineEl); |
| const index = this._indexOfComment(side, comment); |
| if (index !== undefined) { |
| this.set(['comments', side, index, '__hovering'], true); |
| } |
| }, |
| |
| _handleCommentMouseOut(e) { |
| const comment = e.detail.comment; |
| if (!comment.range) { return; } |
| const lineEl = this.diffBuilder.getLineElByChild(e.target); |
| const side = this.diffBuilder.getSideByLineEl(lineEl); |
| const index = this._indexOfComment(side, comment); |
| if (index !== undefined) { |
| this.set(['comments', side, index, '__hovering'], false); |
| } |
| }, |
| |
| _indexOfComment(side, comment) { |
| const idProp = comment.id ? 'id' : '__draftID'; |
| for (let i = 0; i < this.comments[side].length; i++) { |
| if (comment[idProp] && |
| this.comments[side][i][idProp] === comment[idProp]) { |
| return i; |
| } |
| } |
| }, |
| |
| /** |
| * Get current normalized selection. |
| * Merges multiple ranges, accounts for triple click, accounts for |
| * syntax highligh, convert native DOM Range objects to Gerrit concepts |
| * (line, side, etc). |
| * @return {({ |
| * start: { |
| * node: Node, |
| * side: string, |
| * line: Number, |
| * column: Number |
| * }, |
| * end: { |
| * node: Node, |
| * side: string, |
| * line: Number, |
| * column: Number |
| * } |
| * })|null|!Object} |
| */ |
| _getNormalizedRange() { |
| const selection = window.getSelection(); |
| const rangeCount = selection.rangeCount; |
| if (rangeCount === 0) { |
| return null; |
| } else if (rangeCount === 1) { |
| return this._normalizeRange(selection.getRangeAt(0)); |
| } else { |
| const startRange = this._normalizeRange(selection.getRangeAt(0)); |
| const endRange = this._normalizeRange( |
| selection.getRangeAt(rangeCount - 1)); |
| return { |
| start: startRange.start, |
| end: endRange.end, |
| }; |
| } |
| }, |
| |
| /** |
| * Normalize a specific DOM Range. |
| * @return {!Object} fixed normalized range |
| */ |
| _normalizeRange(domRange) { |
| const range = GrRangeNormalizer.normalize(domRange); |
| return this._fixTripleClickSelection({ |
| start: this._normalizeSelectionSide( |
| range.startContainer, range.startOffset), |
| end: this._normalizeSelectionSide( |
| range.endContainer, range.endOffset), |
| }, domRange); |
| }, |
| |
| /** |
| * Adjust triple click selection for the whole line. |
| * A triple click always results in: |
| * - start.column == end.column == 0 |
| * - end.line == start.line + 1 |
| * |
| * @param {!Object} range Normalized range, ie column/line numbers |
| * @param {!Range} domRange DOM Range object |
| * @return {!Object} fixed normalized range |
| */ |
| _fixTripleClickSelection(range, domRange) { |
| if (!range.start) { |
| // Selection outside of current diff. |
| return range; |
| } |
| const start = range.start; |
| const end = range.end; |
| const endsAtBeginningOfNextLine = end && |
| start.column === 0 && |
| end.column === 0 && |
| end.line === start.line + 1; |
| const content = domRange.cloneContents().querySelector('.contentText'); |
| const lineLength = content && this._getLength(content) || 0; |
| if (lineLength && endsAtBeginningOfNextLine) { |
| // Move the selection to the end of the previous line. |
| range.end = { |
| node: start.node, |
| column: lineLength, |
| side: start.side, |
| line: start.line, |
| }; |
| } |
| return range; |
| }, |
| |
| /** |
| * 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 |
| * }|undefined)} |
| */ |
| _normalizeSelectionSide(node, offset) { |
| let column; |
| if (!this.contains(node)) { |
| return; |
| } |
| const lineEl = this.diffBuilder.getLineElByChild(node); |
| if (!lineEl) { |
| return; |
| } |
| const side = this.diffBuilder.getSideByLineEl(lineEl); |
| if (!side) { |
| return; |
| } |
| const line = this.diffBuilder.getLineNumberByChild(lineEl); |
| if (!line) { |
| return; |
| } |
| const contentText = this.diffBuilder.getContentByLineEl(lineEl); |
| if (!contentText) { |
| return; |
| } |
| const contentTd = contentText.parentElement; |
| if (!contentTd.contains(node)) { |
| node = contentText; |
| column = 0; |
| } else { |
| const 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, |
| side, |
| line, |
| column, |
| }; |
| }, |
| |
| /** |
| * The only line in which add a comment tooltip is cut off is the first |
| * line. Even if there is a collapsed section, The first visible line is |
| * in the position where the second line would have been, if not for the |
| * collapsed section, so don't need to worry about this case for |
| * positioning the tooltip. |
| */ |
| _positionActionBox(actionBox, startLine, range) { |
| if (startLine > 1) { |
| actionBox.placeAbove(range); |
| return; |
| } |
| actionBox.positionBelow = true; |
| actionBox.placeBelow(range); |
| }, |
| |
| _handleSelection() { |
| const normalizedRange = this._getNormalizedRange(); |
| if (!normalizedRange) { |
| return; |
| } |
| const domRange = window.getSelection().getRangeAt(0); |
| /** @type {?} */ |
| const start = normalizedRange.start; |
| if (!start) { |
| return; |
| } |
| const end = normalizedRange.end; |
| 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. |
| |
| const actionBox = document.createElement('gr-selection-action-box'); |
| const root = Polymer.dom(this.root); |
| root.insertBefore(actionBox, root.firstElementChild); |
| actionBox.range = { |
| startLine: start.line, |
| startChar: start.column, |
| endLine: end.line, |
| endChar: end.column, |
| }; |
| actionBox.side = start.side; |
| if (start.line === end.line) { |
| this._positionActionBox(actionBox, start.line, domRange); |
| } else if (start.node instanceof Text) { |
| if (start.column) { |
| this._positionActionBox(actionBox, start.line, |
| start.node.splitText(start.column)); |
| } |
| start.node.parentElement.normalize(); // Undo splitText from above. |
| } else if (start.node.classList.contains('content') && |
| start.node.firstChild) { |
| this._positionActionBox(actionBox, start.line, start.node.firstChild); |
| } else { |
| this._positionActionBox(actionBox, start.line, start.node); |
| } |
| }, |
| |
| _createComment(e) { |
| this._removeActionBox(); |
| }, |
| |
| _removeActionBoxDebounced() { |
| this.debounce('removeActionBox', this._removeActionBox, 10); |
| }, |
| |
| _removeActionBox() { |
| const actionBox = this.$$('gr-selection-action-box'); |
| if (actionBox) { |
| Polymer.dom(this.root).removeChild(actionBox); |
| } |
| }, |
| |
| _convertOffsetToColumn(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 {!Element} startNode |
| * @param {function(Node):boolean} callback |
| * @param {Object=} opt_flags If flags.left is true, traverse left. |
| */ |
| _traverseContentSiblings(startNode, callback, opt_flags) { |
| const travelLeft = opt_flags && opt_flags.left; |
| let node = startNode; |
| while (node) { |
| if (node instanceof Element && |
| node.tagName !== 'HL' && |
| node.tagName !== 'SPAN') { |
| break; |
| } |
| const 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 {?Element} node this is sometimes passed as null. |
| * @return {number} |
| */ |
| _getLength(node) { |
| if (node instanceof Element && node.classList.contains('content')) { |
| return this._getLength(node.querySelector('.contentText')); |
| } else { |
| return GrAnnotation.getLength(node); |
| } |
| }, |
| }); |
| })(); |
