FlameChart: move CPUProfiler related part of the FlameChart into a separate file.

Source/devtools/front_end/CPUProfileFlameChart.js

Index: Source/devtools/front_end/CPUProfileFlameChart.js
diff --git a/Source/devtools/front_end/CPUProfileFlameChart.js b/Source/devtools/front_end/CPUProfileFlameChart.js
new file mode 100644
index 0000000000000000000000000000000000000000..eac4cc5e9dbfa389b5f2e2431e2246b440a1f2c1
--- /dev/null
+++ b/Source/devtools/front_end/CPUProfileFlameChart.js
@@ -0,0 +1,362 @@
+/**
+ * Copyright (C) 2014 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @constructor
+ * @extends {WebInspector.VBox}
+ * @param {!WebInspector.FlameChartDataProvider} dataProvider
+ */
+WebInspector.CPUProfileFlameChart = function(dataProvider)
+{
+    WebInspector.VBox.call(this);
+    this.registerRequiredCSS("flameChart.css");
+    this.element.id = "cpu-flame-chart";
+
+    this._overviewPane = new WebInspector.CPUProfileFlameChart.OverviewPane(dataProvider);
+    this._overviewPane.show(this.element);
+
+    this._mainPane = new WebInspector.FlameChart(dataProvider, this._overviewPane, true, false);
+    this._mainPane.show(this.element);
+    this._mainPane.addEventListener(WebInspector.FlameChart.Events.EntrySelected, this._onEntrySelected, this);
+    this._overviewPane._overviewGrid.addEventListener(WebInspector.OverviewGrid.Events.WindowChanged, this._onWindowChanged, this);
+}
+
+WebInspector.CPUProfileFlameChart.prototype = {
+    /**
+     * @param {!WebInspector.Event} event
+     */
+    _onWindowChanged: function(event)
+    {
+        this._mainPane.changeWindow(this._overviewPane._overviewGrid.windowLeft(), this._overviewPane._overviewGrid.windowRight());
+    },
+
+    /**
+     * @param {!number} timeLeft
+     * @param {!number} timeRight
+     */
+    selectRange: function(timeLeft, timeRight)
+    {
+        this._overviewPane._selectRange(timeLeft, timeRight);
+    },
+
+    /**
+     * @param {!WebInspector.Event} event
+     */
+    _onEntrySelected: function(event)
+    {
+        this.dispatchEventToListeners(WebInspector.FlameChart.Events.EntrySelected, event.data);
+    },
+
+    update: function()
+    {
+        this._overviewPane.update();
+        this._mainPane.update();
+    },
+
+    __proto__: WebInspector.VBox.prototype
+};
+
+/**
+ * @constructor
+ * @implements {WebInspector.TimelineGrid.Calculator}
+ */
+WebInspector.CPUProfileFlameChart.OverviewCalculator = function()
+{
+}
+
+WebInspector.CPUProfileFlameChart.OverviewCalculator.prototype = {
+    /**
+     * @return {number}
+     */
+    paddingLeft: function()
+    {
+        return 0;
+    },
+
+    /**
+     * @param {!WebInspector.CPUProfileFlameChart.OverviewPane} overviewPane
+     */
+    _updateBoundaries: function(overviewPane)
+    {
+        this._minimumBoundaries = 0;
+        var totalTime = overviewPane._dataProvider.totalTime();
+        this._maximumBoundaries = totalTime;
+        this._xScaleFactor = overviewPane._overviewCanvas.width / totalTime;
+    },
+
+    /**
+     * @param {number} time
+     * @return {number}
+     */
+    computePosition: function(time)
+    {
+        return (time - this._minimumBoundaries) * this._xScaleFactor;
+    },
+
+    /**
+     * @param {number} value
+     * @param {number=} precision
+     * @return {string}
+     */
+    formatTime: function(value, precision)
+    {
+        return Number.secondsToString((value + this._minimumBoundaries) / 1000);
+    },
+
+    /**
+     * @return {number}
+     */
+    maximumBoundary: function()
+    {
+        return this._maximumBoundaries;
+    },
+
+    /**
+     * @return {number}
+     */
+    minimumBoundary: function()
+    {
+        return this._minimumBoundaries;
+    },
+
+    /**
+     * @return {number}
+     */
+    zeroTime: function()
+    {
+        return this._minimumBoundaries;
+    },
+
+    /**
+     * @return {number}
+     */
+    boundarySpan: function()
+    {
+        return this._maximumBoundaries - this._minimumBoundaries;
+    }
+}
+
+/**
+ * @constructor
+ */
+WebInspector.CPUProfileFlameChart.ColorGenerator = function()
+{
+    this._colors = {};
+    this._currentColorIndex = 0;
+}
+
+WebInspector.CPUProfileFlameChart.ColorGenerator.prototype = {
+    /**
+     * @param {string} id
+     * @param {string|!CanvasGradient} color
+     */
+    setColorForID: function(id, color)
+    {
+        this._colors[id] = color;
+    },
+
+    /**
+     * @param {!string} id
+     * @param {number=} sat
+     * @return {!string}
+     */
+    colorForID: function(id, sat)
+    {
+        if (typeof sat !== "number")
+            sat = 100;
+        var color = this._colors[id];
+        if (!color) {
+            color = this._createColor(this._currentColorIndex++, sat);
+            this._colors[id] = color;
+        }
+        return color;
+    },
+
+    /**
+     * @param {!number} index
+     * @param {!number} sat
+     */
+    _createColor: function(index, sat)
+    {
+        var hue = (index * 7 + 12 * (index % 2)) % 360;
+        return "hsla(" + hue + ", " + sat + "%, 66%, 0.7)";
+    }
+}
+
+/**
+ * @constructor
+ * @extends {WebInspector.VBox}
+ * @implements {WebInspector.FlameChartDelegate}
+ * @param {!WebInspector.FlameChartDataProvider} dataProvider
+ */
+WebInspector.CPUProfileFlameChart.OverviewPane = function(dataProvider)
+{
+    WebInspector.VBox.call(this);
+    this.element.classList.add("flame-chart-overview-pane");
+    this._overviewContainer = this.element.createChild("div", "overview-container");
+    this._overviewGrid = new WebInspector.OverviewGrid("flame-chart");
+    this._overviewGrid.element.classList.add("fill");
+    this._overviewCanvas = this._overviewContainer.createChild("canvas", "flame-chart-overview-canvas");
+    this._overviewContainer.appendChild(this._overviewGrid.element);
+    this._overviewCalculator = new WebInspector.CPUProfileFlameChart.OverviewCalculator();
+    this._dataProvider = dataProvider;
+}
+
+WebInspector.CPUProfileFlameChart.OverviewPane.prototype = {
+    /**
+     * @param {number} windowStartTime
+     * @param {number} windowEndTime
+     */
+    requestWindowTimes: function(windowStartTime, windowEndTime)
+    {
+        this._overviewGrid.setWindow(windowStartTime / this._dataProvider.totalTime(), windowEndTime / this._dataProvider.totalTime());
+    },
+
+    /**
+     * @param {!number} timeLeft
+     * @param {!number} timeRight
+     */
+    _selectRange: function(timeLeft, timeRight)
+    {
+        this._overviewGrid.setWindow(timeLeft / this._dataProvider.totalTime(), timeRight / this._dataProvider.totalTime());
+    },
+
+    /**
+     * @return {?WebInspector.FlameChart.TimelineData}
+     */
+    _timelineData: function()
+    {
+        return this._dataProvider.timelineData();
+    },
+
+    onResize: function()
+    {
+        this._scheduleUpdate();
+    },
+
+    _scheduleUpdate: function()
+    {
+        if (this._updateTimerId)
+            return;
+        this._updateTimerId = requestAnimationFrame(this.update.bind(this));
+    },
+
+    update: function()
+    {
+        this._updateTimerId = 0;
+        var timelineData = this._timelineData();
+        if (!timelineData)
+            return;
+        this._resetCanvas(this._overviewContainer.clientWidth, this._overviewContainer.clientHeight - WebInspector.FlameChart.DividersBarHeight);
+        this._overviewCalculator._updateBoundaries(this);
+        this._overviewGrid.updateDividers(this._overviewCalculator);
+        WebInspector.CPUProfileFlameChart.OverviewPane.drawOverviewCanvas(
+            this._dataProvider,
+            timelineData,
+            this._overviewCanvas.getContext("2d"),
+            this._overviewContainer.clientWidth,
+            this._overviewContainer.clientHeight - WebInspector.FlameChart.DividersBarHeight
+        );
+    },
+
+    /**
+     * @param {!number} width
+     * @param {!number} height
+     */
+    _resetCanvas: function(width, height)
+    {
+        var ratio = window.devicePixelRatio;
+        this._overviewCanvas.width = width * ratio;
+        this._overviewCanvas.height = height * ratio;
+    },
+
+    __proto__: WebInspector.VBox.prototype
+}
+
+/**
+ * @param {!WebInspector.FlameChartDataProvider} dataProvider
+ * @param {!WebInspector.FlameChart.TimelineData} timelineData
+ * @param {!number} width
+ */
+WebInspector.CPUProfileFlameChart.OverviewPane.calculateDrawData = function(dataProvider, timelineData, width)
+{
+    var entryOffsets = timelineData.entryOffsets;
+    var entryTotalTimes = timelineData.entryTotalTimes;
+    var entryLevels = timelineData.entryLevels;
+    var length = entryOffsets.length;
+
+    var drawData = new Uint8Array(width);
+    var scaleFactor = width / dataProvider.totalTime();
+
+    for (var entryIndex = 0; entryIndex < length; ++entryIndex) {
+        var start = Math.floor(entryOffsets[entryIndex] * scaleFactor);
+        var finish = Math.floor((entryOffsets[entryIndex] + entryTotalTimes[entryIndex]) * scaleFactor);
+        for (var x = start; x <= finish; ++x)
+            drawData[x] = Math.max(drawData[x], entryLevels[entryIndex] + 1);
+    }
+    return drawData;
+}
+
+/**
+ * @param {!WebInspector.FlameChartDataProvider} dataProvider
+ * @param {!WebInspector.FlameChart.TimelineData} timelineData
+ * @param {!Object} context
+ * @param {!number} width
+ * @param {!number} height
+ */
+WebInspector.CPUProfileFlameChart.OverviewPane.drawOverviewCanvas = function(dataProvider, timelineData, context, width, height)
+{
+    var drawData = WebInspector.CPUProfileFlameChart.OverviewPane.calculateDrawData(dataProvider, timelineData, width);
+    if (!drawData)
+        return;
+
+    var ratio = window.devicePixelRatio;
+    var canvasWidth = width * ratio;
+    var canvasHeight = height * ratio;
+
+    var yScaleFactor = canvasHeight / (dataProvider.maxStackDepth() * 1.1);
+    context.lineWidth = 1;
+    context.translate(0.5, 0.5);
+    context.strokeStyle = "rgba(20,0,0,0.4)";
+    context.fillStyle = "rgba(214,225,254,0.8)";
+    context.moveTo(-1, canvasHeight - 1);
+    if (drawData)
+      context.lineTo(-1, Math.round(height - drawData[0] * yScaleFactor - 1));
+    var value;
+    for (var x = 0; x < width; ++x) {
+        value = Math.round(canvasHeight - drawData[x] * yScaleFactor - 1);
+        context.lineTo(x * ratio, value);
+    }
+    context.lineTo(canvasWidth + 1, value);
+    context.lineTo(canvasWidth + 1, canvasHeight - 1);
+    context.fill();
+    context.stroke();
+    context.closePath();
+}