1 files changed, 147 insertions, 0 deletions
diff --git a/Source/WebInspectorUI/UserInterface/Views/Slider.js b/Source/WebInspectorUI/UserInterface/Views/Slider.js
new file mode 100644
index 000000000..1b6c47107
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Views/Slider.js
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2013, 2015 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+WebInspector.Slider = class Slider extends WebInspector.Object
+{
+    constructor()
+    {
+        super();
+
+        this._element = document.createElement("div");
+        this._element.className = "slider";
+
+        this._knob = this._element.appendChild(document.createElement("img"));
+
+        this._value = 0;
+        this._knobX = 0;
+        this._maxX = 0;
+
+        this._element.addEventListener("mousedown", this);
+    }
+
+    // Public
+
+    get element()
+    {
+        return this._element;
+    }
+
+    get value()
+    {
+        return this._value;
+    }
+
+    set value(value)
+    {
+        value = Math.max(Math.min(value, 1), 0);
+
+        if (value === this._value)
+            return;
+
+        this.knobX = value;
+
+        if (this.delegate && typeof this.delegate.sliderValueDidChange === "function")
+            this.delegate.sliderValueDidChange(this, value);
+    }
+
+    set knobX(value)
+    {
+        this._value = value;
+        this._knobX = Math.round(value * this.maxX);
+        this._knob.style.webkitTransform = "translate3d(" + this._knobX + "px, 0, 0)";
+    }
+
+    get maxX()
+    {
+        if (this._maxX <= 0 && document.body.contains(this._element))
+            this._maxX = Math.max(this._element.offsetWidth - Math.ceil(WebInspector.Slider.KnobWidth / 2), 0);
+
+        return this._maxX;
+    }
+
+    recalculateKnobX()
+    {
+        this._maxX = 0;
+        this.knobX = this._value;
+    }
+
+    // Protected
+
+    handleEvent(event)
+    {
+        switch (event.type) {
+        case "mousedown":
+            this._handleMousedown(event);
+            break;
+        case "mousemove":
+            this._handleMousemove(event);
+            break;
+        case "mouseup":
+            this._handleMouseup(event);
+            break;
+        }
+    }
+
+    // Private
+
+    _handleMousedown(event)
+    {
+        if (event.target !== this._knob)
+            this.value = (this._localPointForEvent(event).x - 3) / this.maxX;
+
+        this._startKnobX = this._knobX;
+        this._startMouseX = this._localPointForEvent(event).x;
+
+        this._element.classList.add("dragging");
+
+        window.addEventListener("mousemove", this, true);
+        window.addEventListener("mouseup", this, true);
+    }
+
+    _handleMousemove(event)
+    {
+        var dx = this._localPointForEvent(event).x - this._startMouseX;
+        var x = Math.max(Math.min(this._startKnobX + dx, this.maxX), 0);
+
+        this.value = x / this.maxX;
+    }
+
+    _handleMouseup(event)
+    {
+        this._element.classList.remove("dragging");
+
+        window.removeEventListener("mousemove", this, true);
+        window.removeEventListener("mouseup", this, true);
+    }
+
+    _localPointForEvent(event)
+    {
+        // We convert all event coordinates from page coordinates to local coordinates such that the slider
+        // may be transformed using CSS Transforms and interaction works as expected.
+        return window.webkitConvertPointFromPageToNode(this._element, new WebKitPoint(event.pageX, event.pageY));
+    }
+};
+
+WebInspector.Slider.KnobWidth = 13;