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/*
* Copyright (C) 2010 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
*/
WebInspector.HelpScreen = function(title)
{
this._element = document.createElement("div");
this._element.className = "help-window-outer";
this._element.addEventListener("keydown", this._onKeyDown.bind(this), false);
this._element.tabIndex = 0;
this._element.addEventListener("focus", this._onBlur.bind(this), false);
var mainWindow = this._element.createChild("div", "help-window-main");
var captionWindow = mainWindow.createChild("div", "help-window-caption");
var closeButton = captionWindow.createChild("button", "help-close-button");
this.contentElement = mainWindow.createChild("div", "help-content");
captionWindow.createChild("h1", "help-window-title").textContent = title;
closeButton.textContent = "\u2716"; // Code stands for HEAVY MULTIPLICATION X.
closeButton.addEventListener("click", this.hide.bind(this), false);
this._closeKeys = [
WebInspector.KeyboardShortcut.Keys.Enter.code,
WebInspector.KeyboardShortcut.Keys.Esc.code,
WebInspector.KeyboardShortcut.Keys.Space.code,
];
}
WebInspector.HelpScreen.visibleScreen_ = null;
WebInspector.HelpScreen.prototype = {
show: function(onHide)
{
if (this._isShown)
return;
if (WebInspector.HelpScreen.visibleScreen_)
WebInspector.HelpScreen.visibleScreen_.hide();
WebInspector.HelpScreen.visibleScreen_ = this;
document.body.appendChild(this._element);
this._isShown = true;
this._onHide = onHide;
this._previousFocusElement = WebInspector.currentFocusElement();
WebInspector.setCurrentFocusElement(this._element);
},
hide: function()
{
if (!this._isShown)
return;
this._isShown = false;
document.body.removeChild(this._element);
WebInspector.setCurrentFocusElement(this._previousFocusElement);
WebInspector.HelpScreen.visibleScreen_ = null;
if (this._onHide) {
this._onHide();
delete this._onHide;
}
},
_onKeyDown: function(event)
{
if (this._isShown && this._closeKeys.indexOf(event.keyCode) >= 0) {
this.hide();
event.stopPropagation();
}
},
_onBlur: function(event)
{
// Pretend we're modal, grab focus back if we're still shown.
if (this._isShown && !this._element.isSelfOrAncestor(event.target))
WebInspector.setCurrentFocusElement(this._element);
}
}
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