Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | var CodeView = function(divID, PR, sourceText, sourcePosition, broker) { |
| 6 | "use strict"; |
| 7 | var view = this; |
| 8 | |
| 9 | view.divElement = document.getElementById(divID); |
| 10 | view.broker = broker; |
| 11 | view.codeSelection = null; |
| 12 | view.allSpans = []; |
| 13 | |
| 14 | var selectionHandler = { |
| 15 | clear: function() { |
| 16 | broker.clear(selectionHandler); |
| 17 | }, |
| 18 | select: function(items, selected) { |
| 19 | var handler = this; |
| 20 | var divElement = view.divElement; |
| 21 | var broker = view.broker; |
| 22 | for (let span of items) { |
| 23 | if (selected) { |
| 24 | span.classList.add("selected"); |
| 25 | } else { |
| 26 | span.classList.remove("selected"); |
| 27 | } |
| 28 | } |
| 29 | var ranges = []; |
| 30 | for (var span of items) { |
| 31 | ranges.push([span.start, span.end, null]); |
| 32 | } |
| 33 | broker.select(selectionHandler, ranges, selected); |
| 34 | }, |
| 35 | selectionDifference: function(span1, inclusive1, span2, inclusive2) { |
| 36 | var pos1 = span1.start; |
| 37 | var pos2 = span2.start; |
| 38 | var result = []; |
| 39 | var lineListDiv = view.divElement.firstChild.firstChild.childNodes; |
| 40 | for (var i=0; i < lineListDiv.length; i++) { |
| 41 | var currentLineElement = lineListDiv[i]; |
| 42 | var spans = currentLineElement.childNodes; |
| 43 | for (var j=0; j < spans.length; ++j) { |
| 44 | var currentSpan = spans[j]; |
| 45 | if (currentSpan.start > pos1 || (inclusive1 && currentSpan.start == pos1)) { |
| 46 | if (currentSpan.start < pos2 || (inclusive2 && currentSpan.start == pos2)) { |
| 47 | result.push(currentSpan); |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | } |
| 52 | return result; |
| 53 | }, |
| 54 | brokeredSelect: function(ranges, selected) { |
| 55 | var firstSelect = view.codeSelection.isEmpty(); |
| 56 | for (var range of ranges) { |
| 57 | var start = range[0]; |
| 58 | var end = range[1]; |
| 59 | var lower = 0; |
| 60 | var upper = view.allSpans.length; |
| 61 | if (upper > 0) { |
| 62 | while ((upper - lower) > 1) { |
| 63 | var middle = Math.floor((upper + lower) / 2); |
| 64 | var lineStart = view.allSpans[middle].start; |
| 65 | if (lineStart < start) { |
| 66 | lower = middle; |
| 67 | } else if (lineStart > start) { |
| 68 | upper = middle; |
| 69 | } else { |
| 70 | lower = middle; |
| 71 | break; |
| 72 | } |
| 73 | } |
| 74 | var currentSpan = view.allSpans[lower]; |
| 75 | var currentLineElement = currentSpan.parentNode; |
| 76 | if ((currentSpan.start <= start && start < currentSpan.end) || |
| 77 | (currentSpan.start <= end && end < currentSpan.end)) { |
| 78 | if (firstSelect) { |
| 79 | makeContainerPosVisible(view.divElement, currentLineElement.offsetTop); |
| 80 | firstSelect = false; |
| 81 | } |
| 82 | view.codeSelection.select(currentSpan, selected); |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | }, |
| 87 | brokeredClear: function() { |
| 88 | view.codeSelection.clear(); |
| 89 | }, |
| 90 | }; |
| 91 | |
| 92 | view.codeSelection = new Selection(selectionHandler); |
| 93 | broker.addSelectionHandler(selectionHandler); |
| 94 | |
| 95 | var mouseDown = false; |
| 96 | |
| 97 | this.handleSpanMouseDown = function(e) { |
| 98 | e.stopPropagation(); |
| 99 | if (!e.shiftKey) { |
| 100 | view.codeSelection.clear(); |
| 101 | } |
| 102 | view.codeSelection.select(this, true); |
| 103 | mouseDown = true; |
| 104 | } |
| 105 | |
| 106 | this.handleSpanMouseMove = function(e) { |
| 107 | if (mouseDown) { |
| 108 | view.codeSelection.extendTo(this); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | this.handleCodeMouseDown = function(e) { |
| 113 | view.codeSelection.clear(); |
| 114 | } |
| 115 | |
| 116 | document.addEventListener('mouseup', function(e){ |
| 117 | mouseDown = false; |
| 118 | }, false); |
| 119 | |
| 120 | this.initializeCode(sourceText, sourcePosition); |
| 121 | } |
| 122 | |
| 123 | CodeView.prototype.initializeCode = function(sourceText, sourcePosition) { |
| 124 | var view = this; |
| 125 | if (sourceText == "") { |
| 126 | var newHtml = "<pre class=\"prettyprint\"</pre>"; |
| 127 | view.divElement.innerHTML = newHtml; |
| 128 | } else { |
| 129 | var newHtml = "<pre class=\"prettyprint linenums\">" |
| 130 | + sourceText + "</pre>"; |
| 131 | view.divElement.innerHTML = newHtml; |
| 132 | try { |
| 133 | // Wrap in try to work when offline. |
| 134 | PR.prettyPrint(); |
| 135 | } catch (e) { |
| 136 | } |
| 137 | |
| 138 | view.divElement.onmousedown = this.handleCodeMouseDown; |
| 139 | |
| 140 | var base = sourcePosition; |
| 141 | var current = 0; |
| 142 | var lineListDiv = view.divElement.firstChild.firstChild.childNodes; |
| 143 | for (i=0; i < lineListDiv.length; i++) { |
| 144 | var currentLineElement = lineListDiv[i]; |
| 145 | currentLineElement.id = "li" + i; |
| 146 | var pos = base + current; |
| 147 | currentLineElement.pos = pos; |
| 148 | var spans = currentLineElement.childNodes; |
| 149 | for (j=0; j < spans.length; ++j) { |
| 150 | var currentSpan = spans[j]; |
| 151 | if (currentSpan.nodeType == 1) { |
| 152 | currentSpan.start = pos; |
| 153 | currentSpan.end = pos + currentSpan.textContent.length; |
| 154 | currentSpan.onmousedown = this.handleSpanMouseDown; |
| 155 | currentSpan.onmousemove = this.handleSpanMouseMove; |
| 156 | view.allSpans.push(currentSpan); |
| 157 | } |
| 158 | current += currentSpan.textContent.length; |
| 159 | pos = base + current; |
| 160 | } |
| 161 | while ((current < sourceText.length) && ( |
| 162 | sourceText[current] == '\n' || |
| 163 | sourceText[current] == '\r')) { |
| 164 | ++current; |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | this.resizeToParent(); |
| 170 | } |
| 171 | |
| 172 | CodeView.prototype.resizeToParent = function() { |
| 173 | var view = this; |
| 174 | var documentElement = document.documentElement; |
| 175 | var y = view.divElement.parentNode.clientHeight || documentElement.clientHeight; |
| 176 | view.divElement.style.height = y + "px"; |
| 177 | } |