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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
* Copyright (C) 2015 University of Washington.
*
* 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.Resizer = class Resizer extends WebInspector.Object
{
constructor(ruleOrientation, delegate)
{
console.assert(delegate);
super();
this._delegate = delegate;
this._orientation = ruleOrientation;
this._element = document.createElement("div");
this._element.classList.add("resizer");
if (this._orientation === WebInspector.Resizer.RuleOrientation.Horizontal)
this._element.classList.add("horizontal-rule");
else if (this._orientation === WebInspector.Resizer.RuleOrientation.Vertical)
this._element.classList.add("vertical-rule");
this._element.addEventListener("mousedown", this._resizerMouseDown.bind(this), false);
this._resizerMouseMovedEventListener = this._resizerMouseMoved.bind(this);
this._resizerMouseUpEventListener = this._resizerMouseUp.bind(this);
}
// Public
get element()
{
return this._element;
}
get orientation()
{
return this._orientation;
}
get initialPosition()
{
return this._resizerMouseDownPosition || NaN;
}
// Private
_currentPosition()
{
if (this._orientation === WebInspector.Resizer.RuleOrientation.Vertical)
return event.pageX;
if (this._orientation === WebInspector.Resizer.RuleOrientation.Horizontal)
return event.pageY;
console.assert(false, "Should not be reached!");
}
_resizerMouseDown(event)
{
if (event.button !== 0 || event.ctrlKey)
return;
this._resizerMouseDownPosition = this._currentPosition();
var delegateRequestedAbort = false;
if (typeof this._delegate.resizerDragStarted === "function")
delegateRequestedAbort = this._delegate.resizerDragStarted(this, event.target);
if (delegateRequestedAbort) {
delete this._resizerMouseDownPosition;
return;
}
if (this._orientation === WebInspector.Resizer.RuleOrientation.Vertical)
document.body.style.cursor = "col-resize";
else {
console.assert(this._orientation === WebInspector.Resizer.RuleOrientation.Horizontal);
document.body.style.cursor = "row-resize";
}
// Register these listeners on the document so we can track the mouse if it leaves the resizer.
document.addEventListener("mousemove", this._resizerMouseMovedEventListener, false);
document.addEventListener("mouseup", this._resizerMouseUpEventListener, false);
event.preventDefault();
event.stopPropagation();
// Install a global "glass pane" which prevents cursor from changing during the drag interaction.
// The cursor could change when hovering over links, text, or other elements with cursor cues.
// FIXME: when Pointer Events support is available this could be implemented by drawing the cursor ourselves.
if (WebInspector._elementDraggingGlassPane)
WebInspector._elementDraggingGlassPane.remove();
var glassPaneElement = document.createElement("div");
glassPaneElement.className = "glass-pane-for-drag";
document.body.appendChild(glassPaneElement);
WebInspector._elementDraggingGlassPane = glassPaneElement;
}
_resizerMouseMoved(event)
{
event.preventDefault();
event.stopPropagation();
if (typeof this._delegate.resizerDragging === "function")
this._delegate.resizerDragging(this, this._resizerMouseDownPosition - this._currentPosition());
}
_resizerMouseUp(event)
{
if (event.button !== 0 || event.ctrlKey)
return;
document.body.style.removeProperty("cursor");
if (WebInspector._elementDraggingGlassPane) {
WebInspector._elementDraggingGlassPane.remove();
delete WebInspector._elementDraggingGlassPane;
}
document.removeEventListener("mousemove", this._resizerMouseMovedEventListener, false);
document.removeEventListener("mouseup", this._resizerMouseUpEventListener, false);
event.preventDefault();
event.stopPropagation();
if (typeof this._delegate.resizerDragEnded === "function")
this._delegate.resizerDragEnded(this);
delete this._resizerMouseDownPosition;
}
};
WebInspector.Resizer.RuleOrientation = {
Horizontal: Symbol("resizer-rule-orientation-horizontal"),
Vertical: Symbol("resizer-rule-orientation-vertical"),
};
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