TimelineOverviewPane.js [plain text]
WebInspector.TimelineOverviewPane = function(model)
{
WebInspector.View.call(this);
this.element.id = "timeline-overview-panel";
this._windowStartTime = 0;
this._windowEndTime = Infinity;
this._eventDividers = [];
this._model = model;
this._topPaneSidebarElement = document.createElement("div");
this._topPaneSidebarElement.id = "timeline-overview-sidebar";
var overviewTreeElement = document.createElement("ol");
overviewTreeElement.className = "sidebar-tree";
this._topPaneSidebarElement.appendChild(overviewTreeElement);
this.element.appendChild(this._topPaneSidebarElement);
var topPaneSidebarTree = new TreeOutline(overviewTreeElement);
this._overviewItems = {};
this._overviewItems[WebInspector.TimelineOverviewPane.Mode.Events] = new WebInspector.SidebarTreeElement("timeline-overview-sidebar-events",
WebInspector.UIString("Events"));
if (Capabilities.timelineSupportsFrameInstrumentation) {
this._overviewItems[WebInspector.TimelineOverviewPane.Mode.Frames] = new WebInspector.SidebarTreeElement("timeline-overview-sidebar-frames",
WebInspector.UIString("Frames"));
}
this._overviewItems[WebInspector.TimelineOverviewPane.Mode.Memory] = new WebInspector.SidebarTreeElement("timeline-overview-sidebar-memory",
WebInspector.UIString("Memory"));
for (var mode in this._overviewItems) {
var item = this._overviewItems[mode];
item.onselect = this.setMode.bind(this, mode);
topPaneSidebarTree.appendChild(item);
}
this._overviewGrid = new WebInspector.OverviewGrid("timeline");
this.element.appendChild(this._overviewGrid.element);
var separatorElement = document.createElement("div");
separatorElement.id = "timeline-overview-separator";
this.element.appendChild(separatorElement);
this._innerSetMode(WebInspector.TimelineOverviewPane.Mode.Events);
var categories = WebInspector.TimelinePresentationModel.categories();
for (var category in categories)
categories[category].addEventListener(WebInspector.TimelineCategory.Events.VisibilityChanged, this._onCategoryVisibilityChanged, this);
this._overviewCalculator = new WebInspector.TimelineOverviewCalculator();
model.addEventListener(WebInspector.TimelineModel.Events.RecordAdded, this._onRecordAdded, this);
model.addEventListener(WebInspector.TimelineModel.Events.RecordsCleared, this._reset, this);
this._overviewGrid.addEventListener(WebInspector.OverviewGrid.Events.WindowChanged, this._onWindowChanged, this);
}
WebInspector.TimelineOverviewPane.Mode = {
Events: "Events",
Frames: "Frames",
Memory: "Memory"
};
WebInspector.TimelineOverviewPane.Events = {
ModeChanged: "ModeChanged",
WindowChanged: "WindowChanged"
};
WebInspector.TimelineOverviewPane.prototype = {
wasShown: function()
{
this._update();
},
onResize: function()
{
this._update();
},
setMode: function(newMode)
{
if (this._currentMode === newMode)
return;
this._innerSetMode(newMode);
this.dispatchEventToListeners(WebInspector.TimelineOverviewPane.Events.ModeChanged, this._currentMode);
this._update();
},
_innerSetMode: function(newMode)
{
if (this._overviewControl)
this._overviewControl.detach();
this._currentMode = newMode;
this._overviewControl = this._createOverviewControl();
this._overviewControl.show(this._overviewGrid.element);
this._overviewItems[this._currentMode].revealAndSelect(false);
},
_createOverviewControl: function()
{
switch (this._currentMode) {
case WebInspector.TimelineOverviewPane.Mode.Events:
return new WebInspector.TimelineEventOverview(this._model);
case WebInspector.TimelineOverviewPane.Mode.Frames:
return new WebInspector.TimelineFrameOverview(this._model);
case WebInspector.TimelineOverviewPane.Mode.Memory:
return new WebInspector.TimelineMemoryOverview(this._model);
}
throw new Error("Invalid overview mode: " + this._currentMode);
},
_onCategoryVisibilityChanged: function(event)
{
this._overviewControl.categoryVisibilityChanged();
},
_update: function()
{
delete this._refreshTimeout;
this._updateWindow();
this._overviewCalculator.setWindow(this._model.minimumRecordTime(), this._model.maximumRecordTime());
this._overviewCalculator.setDisplayWindow(0, this._overviewGrid.clientWidth());
this._overviewControl.update();
this._overviewGrid.updateDividers(this._overviewCalculator);
this._updateEventDividers();
},
_updateEventDividers: function()
{
var records = this._eventDividers;
this._overviewGrid.removeEventDividers();
var dividers = [];
for (var i = 0; i < records.length; ++i) {
var record = records[i];
var positions = this._overviewCalculator.computeBarGraphPercentages(record);
var dividerPosition = Math.round(positions.start * 10);
if (dividers[dividerPosition])
continue;
var divider = WebInspector.TimelinePresentationModel.createEventDivider(record.type);
divider.style.left = positions.start + "%";
dividers[dividerPosition] = divider;
}
this._overviewGrid.addEventDividers(dividers);
},
sidebarResized: function(width)
{
this._overviewGrid.element.style.left = width + "px";
this._topPaneSidebarElement.style.width = width + "px";
this._update();
},
addFrame: function(frame)
{
this._overviewControl.addFrame(frame);
this._scheduleRefresh();
},
zoomToFrame: function(frame)
{
var frameOverview = (this._overviewControl);
var window = frameOverview.framePosition(frame);
if (!window)
return;
this._overviewGrid.setWindowPosition(window.start, window.end);
},
_onRecordAdded: function(event)
{
var record = event.data;
var eventDividers = this._eventDividers;
function addEventDividers(record)
{
if (WebInspector.TimelinePresentationModel.isEventDivider(record))
eventDividers.push(record);
}
WebInspector.TimelinePresentationModel.forAllRecords([record], addEventDividers);
this._scheduleRefresh();
},
_reset: function()
{
this._windowStartTime = 0;
this._windowEndTime = Infinity;
this._overviewCalculator.reset();
this._overviewGrid.reset();
this._eventDividers = [];
this._overviewGrid.updateDividers(this._overviewCalculator);
this._overviewControl.reset();
this._update();
},
windowStartTime: function()
{
return this._windowStartTime || this._model.minimumRecordTime();
},
windowEndTime: function()
{
return this._windowEndTime < Infinity ? this._windowEndTime : this._model.maximumRecordTime();
},
windowLeft: function()
{
return this._overviewGrid.windowLeft();
},
windowRight: function()
{
return this._overviewGrid.windowRight();
},
_onWindowChanged: function()
{
if (this._ignoreWindowChangedEvent)
return;
var times = this._overviewControl.windowTimes(this.windowLeft(), this.windowRight());
this._windowStartTime = times.startTime;
this._windowEndTime = times.endTime;
this.dispatchEventToListeners(WebInspector.TimelineOverviewPane.Events.WindowChanged);
},
setWindowTimes: function(left, right)
{
this._windowStartTime = left;
this._windowEndTime = right;
this._updateWindow();
},
_updateWindow: function()
{
var offset = this._model.minimumRecordTime();
var timeSpan = this._model.maximumRecordTime() - offset;
var left = this._windowStartTime ? (this._windowStartTime - offset) / timeSpan : 0;
var right = this._windowEndTime < Infinity ? (this._windowEndTime - offset) / timeSpan : 1;
this._ignoreWindowChangedEvent = true;
this._overviewGrid.setWindow(left, right);
this._ignoreWindowChangedEvent = false;
},
_scheduleRefresh: function()
{
if (this._refreshTimeout)
return;
if (!this.isShowing())
return;
this._refreshTimeout = setTimeout(this._update.bind(this), 300);
},
__proto__: WebInspector.View.prototype
}
WebInspector.TimelineOverviewCalculator = function()
{
}
WebInspector.TimelineOverviewCalculator.prototype = {
computePosition: function(time)
{
return (time - this._minimumBoundary) / this.boundarySpan() * this._workingArea + this.paddingLeft;
},
computeBarGraphPercentages: function(record)
{
var start = (WebInspector.TimelineModel.startTimeInSeconds(record) - this._minimumBoundary) / this.boundarySpan() * 100;
var end = (WebInspector.TimelineModel.endTimeInSeconds(record) - this._minimumBoundary) / this.boundarySpan() * 100;
return {start: start, end: end};
},
setWindow: function(minimum, maximum)
{
this._minimumBoundary = minimum >= 0 ? minimum : undefined;
this._maximumBoundary = maximum >= 0 ? maximum : undefined;
},
setDisplayWindow: function(paddingLeft, clientWidth)
{
this._workingArea = clientWidth - paddingLeft;
this.paddingLeft = paddingLeft;
},
reset: function()
{
this.setWindow();
},
formatTime: function(value)
{
return Number.secondsToString(value);
},
maximumBoundary: function()
{
return this._maximumBoundary;
},
minimumBoundary: function()
{
return this._minimumBoundary;
},
zeroTime: function()
{
return this._minimumBoundary;
},
boundarySpan: function()
{
return this._maximumBoundary - this._minimumBoundary;
}
}
WebInspector.TimelineOverviewBase = function(model)
{
WebInspector.View.call(this);
this._model = model;
this._canvas = this.element.createChild("canvas", "fill");
}
WebInspector.TimelineOverviewBase.prototype = {
update: function() { },
reset: function() { },
categoryVisibilityChanged: function() { },
addFrame: function(frame) { },
windowTimes: function(windowLeft, windowRight)
{
var absoluteMin = this._model.minimumRecordTime();
var absoluteMax = this._model.maximumRecordTime();
return {
startTime: absoluteMin + (absoluteMax - absoluteMin) * windowLeft,
endTime: absoluteMin + (absoluteMax - absoluteMin) * windowRight
};
},
__proto__: WebInspector.View.prototype
}
WebInspector.TimelineMemoryOverview = function(model)
{
WebInspector.TimelineOverviewBase.call(this, model);
this.element.id = "timeline-overview-memory";
this.element.classList.add("fill");
this._maxHeapSizeLabel = this.element.createChild("div", "max memory-graph-label");
this._minHeapSizeLabel = this.element.createChild("div", "min memory-graph-label");
}
WebInspector.TimelineMemoryOverview.prototype = {
reset: function()
{
this._maxHeapSizeLabel.textContent = "";
this._minHeapSizeLabel.textContent = "";
},
update: function()
{
const yPadding = 5;
this._canvas.width = this.element.clientWidth;
this._canvas.height = this.element.clientHeight - yPadding;
var records = this._model.records;
if (!records.length)
return;
const lowerOffset = 3;
var maxUsedHeapSize = 0;
var minUsedHeapSize = 100000000000;
var minTime = this._model.minimumRecordTime();
var maxTime = this._model.maximumRecordTime();;
WebInspector.TimelinePresentationModel.forAllRecords(records, function(r) {
maxUsedHeapSize = Math.max(maxUsedHeapSize, r.usedHeapSize || maxUsedHeapSize);
minUsedHeapSize = Math.min(minUsedHeapSize, r.usedHeapSize || minUsedHeapSize);
});
minUsedHeapSize = Math.min(minUsedHeapSize, maxUsedHeapSize);
var width = this._canvas.width;
var height = this._canvas.height - lowerOffset;
var xFactor = width / (maxTime - minTime);
var yFactor = height / (maxUsedHeapSize - minUsedHeapSize);
var histogram = new Array(width);
WebInspector.TimelinePresentationModel.forAllRecords(records, function(r) {
if (!r.usedHeapSize)
return;
var x = Math.round((WebInspector.TimelineModel.endTimeInSeconds(r) - minTime) * xFactor);
var y = Math.round((r.usedHeapSize - minUsedHeapSize) * yFactor);
histogram[x] = Math.max(histogram[x] || 0, y);
});
var ctx = this._canvas.getContext("2d");
this._clear(ctx);
height = height + 1;
ctx.beginPath();
var initialY = 0;
for (var k = 0; k < histogram.length; k++) {
if (histogram[k]) {
initialY = histogram[k];
break;
}
}
ctx.moveTo(0, height - initialY);
for (var x = 0; x < histogram.length; x++) {
if (!histogram[x])
continue;
ctx.lineTo(x, height - histogram[x]);
}
ctx.lineWidth = 0.5;
ctx.strokeStyle = "rgba(20,0,0,0.8)";
ctx.stroke();
ctx.fillStyle = "rgba(214,225,254, 0.8);";
ctx.lineTo(width, 60);
ctx.lineTo(0, 60);
ctx.lineTo(0, height - initialY);
ctx.fill();
ctx.closePath();
this._maxHeapSizeLabel.textContent = Number.bytesToString(maxUsedHeapSize);
this._minHeapSizeLabel.textContent = Number.bytesToString(minUsedHeapSize);
},
_clear: function(ctx)
{
ctx.fillStyle = "rgba(255,255,255,0.8)";
ctx.fillRect(0, 0, this._canvas.width, this._canvas.height);
},
__proto__: WebInspector.TimelineOverviewBase.prototype
}
WebInspector.TimelineEventOverview = function(model)
{
WebInspector.TimelineOverviewBase.call(this, model);
this.element.id = "timeline-overview-events";
this._context = this._canvas.getContext("2d");
this._fillStyles = {};
var categories = WebInspector.TimelinePresentationModel.categories();
for (var category in categories)
this._fillStyles[category] = WebInspector.TimelinePresentationModel.createFillStyleForCategory(this._context, 0, WebInspector.TimelineEventOverview._innerStripHeight, categories[category]);
this._disabledCategoryFillStyle = WebInspector.TimelinePresentationModel.createFillStyle(this._context, 0, WebInspector.TimelineEventOverview._innerStripHeight,
"rgb(218, 218, 218)", "rgb(170, 170, 170)", "rgb(143, 143, 143)");
this._disabledCategoryBorderStyle = "rgb(143, 143, 143)";
}
WebInspector.TimelineEventOverview._canvasHeight = 60;
WebInspector.TimelineEventOverview._numberOfStrips = 3;
WebInspector.TimelineEventOverview._stripHeight = Math.round(WebInspector.TimelineEventOverview._canvasHeight / WebInspector.TimelineEventOverview._numberOfStrips);
WebInspector.TimelineEventOverview._stripPadding = 4;
WebInspector.TimelineEventOverview._innerStripHeight = WebInspector.TimelineEventOverview._stripHeight - 2 * WebInspector.TimelineEventOverview._stripPadding;
WebInspector.TimelineEventOverview.prototype = {
update: function()
{
this._canvas.width = this.element.parentElement.clientWidth;
this._canvas.height = WebInspector.TimelineEventOverview._canvasHeight;
var timeOffset = this._model.minimumRecordTime();
var timeSpan = this._model.maximumRecordTime() - timeOffset;
var scale = this._canvas.width / timeSpan;
var lastBarByGroup = [];
this._context.fillStyle = "rgba(0, 0, 0, 0.05)";
for (var i = 1; i < WebInspector.TimelineEventOverview._numberOfStrips; i += 2)
this._context.fillRect(0.5, i * WebInspector.TimelineEventOverview._stripHeight + 0.5, this._canvas.width, WebInspector.TimelineEventOverview._stripHeight);
function appendRecord(record)
{
if (record.type === WebInspector.TimelineModel.RecordType.BeginFrame)
return;
var recordStart = Math.floor((WebInspector.TimelineModel.startTimeInSeconds(record) - timeOffset) * scale);
var recordEnd = Math.ceil((WebInspector.TimelineModel.endTimeInSeconds(record) - timeOffset) * scale);
var category = WebInspector.TimelinePresentationModel.categoryForRecord(record);
if (category.overviewStripGroupIndex < 0)
return;
var bar = lastBarByGroup[category.overviewStripGroupIndex];
const barsMergeThreshold = 2;
if (bar && bar.category === category && bar.end + barsMergeThreshold >= recordStart) {
if (recordEnd > bar.end)
bar.end = recordEnd;
return;
}
if (bar)
this._renderBar(bar.start, bar.end, bar.category);
lastBarByGroup[category.overviewStripGroupIndex] = { start: recordStart, end: recordEnd, category: category };
}
WebInspector.TimelinePresentationModel.forAllRecords(this._model.records, appendRecord.bind(this));
for (var i = 0; i < lastBarByGroup.length; ++i) {
if (lastBarByGroup[i])
this._renderBar(lastBarByGroup[i].start, lastBarByGroup[i].end, lastBarByGroup[i].category);
}
},
categoryVisibilityChanged: function()
{
this.update();
},
_renderBar: function(begin, end, category)
{
var x = begin + 0.5;
var y = category.overviewStripGroupIndex * WebInspector.TimelineEventOverview._stripHeight + WebInspector.TimelineEventOverview._stripPadding + 0.5;
var width = Math.max(end - begin, 1);
this._context.save();
this._context.translate(x, y);
this._context.fillStyle = category.hidden ? this._disabledCategoryFillStyle : this._fillStyles[category.name];
this._context.fillRect(0, 0, width, WebInspector.TimelineEventOverview._innerStripHeight);
this._context.strokeStyle = category.hidden ? this._disabledCategoryBorderStyle : category.borderColor;
this._context.strokeRect(0, 0, width, WebInspector.TimelineEventOverview._innerStripHeight);
this._context.restore();
},
__proto__: WebInspector.TimelineOverviewBase.prototype
}
WebInspector.TimelineFrameOverview = function(model)
{
WebInspector.TimelineOverviewBase.call(this, model);
this._canvas.classList.add("timeline-frame-overview-bars");
this.reset();
this._outerPadding = 4;
this._maxInnerBarWidth = 10;
this._actualPadding = 5;
this._actualOuterBarWidth = this._maxInnerBarWidth + this._actualPadding;
this._context = this._canvas.getContext("2d");
this._fillStyles = {};
var categories = WebInspector.TimelinePresentationModel.categories();
for (var category in categories)
this._fillStyles[category] = WebInspector.TimelinePresentationModel.createFillStyleForCategory(this._context, this._maxInnerBarWidth, 0, categories[category]);
}
WebInspector.TimelineFrameOverview.prototype = {
reset: function()
{
this._recordsPerBar = 1;
this._barTimes = [];
this._frames = [];
},
update: function()
{
const minBarWidth = 4;
this._framesPerBar = Math.max(1, this._frames.length * minBarWidth / this.element.clientWidth);
this._barTimes = [];
var visibleFrames = this._aggregateFrames(this._framesPerBar);
const paddingTop = 4;
const targetFPS = 30;
var fullBarLength = 1.0 / targetFPS;
if (fullBarLength < this._medianFrameLength)
fullBarLength = Math.min(this._medianFrameLength * 2, this._maxFrameLength);
var scale = (this._canvas.clientHeight - paddingTop) / fullBarLength;
this._renderBars(visibleFrames, scale);
},
addFrame: function(frame)
{
this._frames.push(frame);
},
framePosition: function(frame)
{
var frameNumber = this._frames.indexOf(frame);
if (frameNumber < 0)
return;
var barNumber = Math.floor(frameNumber / this._framesPerBar);
var firstBar = this._framesPerBar > 1 ? barNumber : Math.max(barNumber - 1, 0);
var lastBar = this._framesPerBar > 1 ? barNumber : Math.min(barNumber + 1, this._barTimes.length - 1);
return {
start: Math.ceil(this._barNumberToScreenPosition(firstBar) - this._actualPadding / 2),
end: Math.floor(this._barNumberToScreenPosition(lastBar + 1) - this._actualPadding / 2)
}
},
_aggregateFrames: function(framesPerBar)
{
var visibleFrames = [];
var durations = [];
this._maxFrameLength = 0;
for (var barNumber = 0, currentFrame = 0; currentFrame < this._frames.length; ++barNumber) {
var barStartTime = this._frames[currentFrame].startTime;
var longestFrame = null;
for (var lastFrame = Math.min(Math.floor((barNumber + 1) * framesPerBar), this._frames.length);
currentFrame < lastFrame; ++currentFrame) {
if (!longestFrame || longestFrame.duration < this._frames[currentFrame].duration)
longestFrame = this._frames[currentFrame];
}
var barEndTime = this._frames[currentFrame - 1].endTime;
if (longestFrame) {
this._maxFrameLength = Math.max(this._maxFrameLength, longestFrame.duration);
visibleFrames.push(longestFrame);
this._barTimes.push({ startTime: barStartTime, endTime: barEndTime });
durations.push(longestFrame.duration);
}
}
this._medianFrameLength = durations.qselect(Math.floor(durations.length / 2));
return visibleFrames;
},
_renderBars: function(frames, scale)
{
this._canvas.width = this._canvas.clientWidth;
this._canvas.height = this._canvas.clientHeight;
const maxPadding = 5;
this._actualOuterBarWidth = Math.min((this._canvas.width - 2 * this._outerPadding) / frames.length, this._maxInnerBarWidth + maxPadding);
this._actualPadding = Math.min(Math.floor(this._actualOuterBarWidth / 3), maxPadding);
var barWidth = this._actualOuterBarWidth - this._actualPadding;
for (var i = 0; i < frames.length; ++i)
this._renderBar(this._barNumberToScreenPosition(i), barWidth, frames[i], scale);
this._drawFPSMarks(scale);
},
_barNumberToScreenPosition: function(n)
{
return this._outerPadding + this._actualOuterBarWidth * n;
},
_drawFPSMarks: function(scale)
{
const fpsMarks = [30, 60];
this._context.save();
this._context.beginPath();
this._context.font = "9px monospace";
this._context.textAlign = "right";
this._context.textBaseline = "top";
const labelPadding = 2;
var lineHeight = 12;
var labelTopMargin = 0;
for (var i = 0; i < fpsMarks.length; ++i) {
var fps = fpsMarks[i];
var y = this._canvas.height - Math.floor(1.0 / fps * scale) - 0.5;
var label = fps + " FPS ";
var labelWidth = this._context.measureText(label).width;
var labelX = this._canvas.width;
var labelY;
if (labelTopMargin < y - lineHeight)
labelY = y - lineHeight;
else if (y + lineHeight < this._canvas.height)
labelY = y;
else
break;
this._context.moveTo(0, y);
this._context.lineTo(this._canvas.width, y);
this._context.fillStyle = "rgba(255, 255, 255, 0.75)";
this._context.fillRect(labelX - labelWidth - labelPadding, labelY, labelWidth + 2 * labelPadding, lineHeight);
this._context.fillStyle = "rgb(0, 0, 0)";
this._context.fillText(label, labelX, labelY);
labelTopMargin = labelY + lineHeight;
}
this._context.strokeStyle = "rgb(51, 51, 51)";
this._context.stroke();
this._context.restore();
},
_renderBar: function(left, width, frame, scale)
{
var categories = Object.keys(WebInspector.TimelinePresentationModel.categories());
if (!categories.length)
return;
var x = Math.floor(left) + 0.5;
width = Math.floor(width);
for (var i = 0, bottomOffset = this._canvas.height; i < categories.length; ++i) {
var category = categories[i];
var duration = frame.timeByCategory[category];
if (!duration)
continue;
var height = duration * scale;
var y = Math.floor(bottomOffset - height) + 0.5;
this._context.save();
this._context.translate(x, 0);
this._context.scale(width / this._maxInnerBarWidth, 1);
this._context.fillStyle = this._fillStyles[category];
this._context.fillRect(0, y, this._maxInnerBarWidth, Math.floor(height));
this._context.restore();
this._context.strokeStyle = WebInspector.TimelinePresentationModel.categories()[category].borderColor;
this._context.strokeRect(x, y, width, Math.floor(height));
bottomOffset -= height - 1;
}
var nonCPUTime = frame.duration - frame.cpuTime;
var y0 = Math.floor(bottomOffset - nonCPUTime * scale) + 0.5;
var y1 = Math.floor(bottomOffset) + 0.5;
this._context.strokeStyle = "rgb(90, 90, 90)";
this._context.beginPath();
this._context.moveTo(x, y1);
this._context.lineTo(x, y0);
this._context.lineTo(x + width, y0);
this._context.lineTo(x + width, y1);
this._context.stroke();
},
windowTimes: function(windowLeft, windowRight)
{
var windowSpan = this.element.clientWidth;
var leftOffset = windowLeft * windowSpan - this._outerPadding + this._actualPadding;
var rightOffset = windowRight * windowSpan - this._outerPadding;
var bars = this.element.children;
var firstBar = Math.floor(Math.max(leftOffset, 0) / this._actualOuterBarWidth);
var lastBar = Math.min(Math.floor(rightOffset / this._actualOuterBarWidth), this._barTimes.length - 1);
const snapToRightTolerancePixels = 3;
return {
startTime: firstBar >= this._barTimes.length ? Infinity : this._barTimes[firstBar].startTime,
endTime: rightOffset + snapToRightTolerancePixels > windowSpan ? Infinity : this._barTimes[lastBar].endTime
}
},
__proto__: WebInspector.TimelineOverviewBase.prototype
}
WebInspector.TimelineWindowFilter = function(pane)
{
this._pane = pane;
}
WebInspector.TimelineWindowFilter.prototype = {
accept: function(record)
{
return record.lastChildEndTime >= this._pane._windowStartTime && record.startTime <= this._pane._windowEndTime;
}
}