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#ifdef 0
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#endif
/**
* This singleton represents the whole 'New Tab Page' and takes care of
* initializing all its components.
*/
let gPage = {
/**
* Initializes the page.
*/
init: function Page_init() {
// Add ourselves to the list of pages to receive notifications.
gAllPages.register(this);
// Listen for 'unload' to unregister this page.
addEventListener("unload", this, false);
// Listen for toggle button clicks.
let button = document.getElementById("newtab-toggle");
button.addEventListener("click", this, false);
// Check if the new tab feature is enabled.
let enabled = gAllPages.enabled;
if (enabled)
this._init();
this._updateAttributes(enabled);
},
/**
* Listens for notifications specific to this page.
*/
observe: function Page_observe() {
let enabled = gAllPages.enabled;
this._updateAttributes(enabled);
// Initialize the whole page if we haven't done that, yet.
if (enabled) {
this._init();
} else {
gUndoDialog.hide();
}
},
/**
* Updates the whole page and the grid when the storage has changed.
*/
update: function Page_update() {
// The grid might not be ready yet as we initialize it asynchronously.
if (gGrid.ready) {
gGrid.refresh();
}
},
/**
* Internally initializes the page. This runs only when/if the feature
* is/gets enabled.
*/
_init: function Page_init() {
if (this._initialized)
return;
this._initialized = true;
gLinks.populateCache(function () {
// Initialize and render the grid.
gGrid.init();
// Initialize the drop target shim.
gDropTargetShim.init();
#ifdef XP_MACOSX
// Workaround to prevent a delay on MacOSX due to a slow drop animation.
document.addEventListener("dragover", this, false);
document.addEventListener("drop", this, false);
#endif
}.bind(this));
},
/**
* Updates the 'page-disabled' attributes of the respective DOM nodes.
* @param aValue Whether the New Tab Page is enabled or not.
*/
_updateAttributes: function Page_updateAttributes(aValue) {
// Set the nodes' states.
let nodeSelector = "#newtab-scrollbox, #newtab-toggle, #newtab-grid";
for (let node of document.querySelectorAll(nodeSelector)) {
if (aValue)
node.removeAttribute("page-disabled");
else
node.setAttribute("page-disabled", "true");
}
// Enables/disables the control and link elements.
let inputSelector = ".newtab-control, .newtab-link";
for (let input of document.querySelectorAll(inputSelector)) {
if (aValue)
input.removeAttribute("tabindex");
else
input.setAttribute("tabindex", "-1");
}
// Update the toggle button's title.
let toggle = document.getElementById("newtab-toggle");
toggle.setAttribute("title", newTabString(aValue ? "hide" : "show"));
},
/**
* Handles all page events.
*/
handleEvent: function Page_handleEvent(aEvent) {
switch (aEvent.type) {
case "unload":
gAllPages.unregister(this);
break;
case "click":
gAllPages.enabled = !gAllPages.enabled;
break;
case "dragover":
if (gDrag.isValid(aEvent) && gDrag.draggedSite)
aEvent.preventDefault();
break;
case "drop":
if (gDrag.isValid(aEvent) && gDrag.draggedSite) {
aEvent.preventDefault();
aEvent.stopPropagation();
}
break;
}
}
};
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