Patch Launcher Reset to Middle Page

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Revision as of 04:52, 30 November 2009 by IMGrant (talk | contribs) (New page: {{template:patch}} ==Introduction== The Launcher maintains the last page opened when you return to it. If you most frequently use apps on a certain page of the Launcher, you have to swipe...)
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Introduction

The Launcher maintains the last page opened when you return to it. If you most frequently use apps on a certain page of the Launcher, you have to swipe back to that page if the last app you launched was on another page. This patch resets the Launcher to the middle page every time it opens. This works best if you have an odd number of pages (like the default 3), then you have the same number of pages to the left, and to the right, thus minimizing the number of swipes required to get to the first or last page. This also works best in combination with the Patch Launcher Reset Scroll on Page Change patch to ensure the page is also always scrolled to the top.

Editing Process

  • SSH in.
  • Remount the filesystem as read/write:
<source lang="bash">

sudo rootfs_open -w

</source>
  • Load launcher-assistant.js in vi:
<source lang="bash">

sudo vi /usr/lib/luna/system/luna-applauncher/app/controllers/launcher-assistant.js

</source>
  • Locate the 'Mojo.listen' handlers in the setup method around line 70 (setup begins at line 67 in webOS 1.3.1):
<source lang="javascript">

setup: function() {

Mojo.listen(this.controller.document, Mojo.Event.deactivate, this.onDeactivate.bindAsEventListener(this)); Mojo.listen(this.controller.window, 'resize', this.onResize.bindAsEventListener(this));

</source>
  • Insert a new listener in between the existing two so that it now looks like this:
<source lang="javascript">

setup: function() {

Mojo.listen(this.controller.document, Mojo.Event.deactivate, this.onDeactivate.bindAsEventListener(this)); Mojo.listen(this.controller.document, Mojo.Event.activate, this.onActivate.bindAsEventListener(this)); Mojo.listen(this.controller.window, 'resize', this.onResize.bindAsEventListener(this));

</source>
  • Locate the beginning of the onDeactivate method around line 170 (onDeactivate begins at line 171 in webOS 1.3.1):
<source lang="javascript">

/* clean and hide global search */ onDeactivate: function(event) {

</source>
  • Add the following lines before onDeactivate so that is now looks like this:
<source lang="javascript">

/* set launcher page to override last used page */ onActivate: function(event) { /** * Calculate middle page. For an even number of pages, * this will be the lower side of the mid-point. */ var numPages=this.pagesModel.getNumPages(); var middlePage = (numPages % 2) ? (numPages - 1) / 2: numPages / 2 - 1;

// set launcher to middle page $('launcher_root').mojo.setSnapIndex(middlePage, false);

/** * If Bsiegel's 'Reset Scroll Position' patch is installed * then this does what it says on the tin for the middle page. */ event.value = middlePage; /* Fudge this because onPageChange expects a * mojo-property-change event but it's actually * getting mojo-event-deactivate. */ this.onPageChange(event); },

/* clean and hide global search */ onDeactivate: function(event) {

</source>
  • Save the file and quit vi.
  • Remount the filesystem as read only - this should reboot your Pre:
<source lang="bash">

sudo rootfs_open -w

</source>


Patch Process

The patch is not in the webos-internals gitorious repository yet, but is has been submitted. Until then, you can copy and paste the source below. Visit Applying Patches for info on how to use it. You can also apply it using webOS Quick Install. To apply the patch, follow the instructions above, and after remounting the filesystem as read/write, do the following:

  • Apply the patch (In this example, I have the patch file located in my home directory under patches):
<source lang="bash">

cd / sudo patch -p0 --backup-if-mismatch < ~/patches/reset-to-middle-page.patch

</source>

This is what you should see if it ran properly: <source lang="text"> patching file /usr/lib/luna/system/luna-applauncher/app/controllers/launcher-assistant.js

</source>
  • Remount the filesystem as read only as described above.


Patch Source (reset-to-midle-page.patch)

<source lang="diff"> --- /usr/lib/luna/system/luna-applauncher/app/controllers/launcher-assistant.js.webosinternals.orig Sat Nov 28 01:54:57 2009 +++ /usr/lib/luna/system/luna-applauncher/app/controllers/launcher-assistant.js Mon Nov 30 03:14:42 2009 @@ -67,6 +67,7 @@

	setup: function() {
		
		Mojo.listen(this.controller.document, Mojo.Event.deactivate, this.onDeactivate.bindAsEventListener(this));

+ Mojo.listen(this.controller.document, Mojo.Event.activate, this.onActivate.bindAsEventListener(this));

		Mojo.listen(this.controller.window, 'resize', this.onResize.bindAsEventListener(this));
		
		this.pagesModel = new LauncherPages({

@@ -167,6 +168,29 @@

		this.updatePageIndicators();
	},
	

+ /* set launcher page to override last used page */ + onActivate: function(event) { + /** + * Calculate middle page. For an even number of pages, + * this will be the lower side of the mid-point. + */ + var numPages=this.pagesModel.getNumPages(); + var middlePage = (numPages % 2) ? (numPages - 1) / 2: numPages / 2 - 1; + + // set launcher to middle page + $('launcher_root').mojo.setSnapIndex(middlePage, false); + + /** + * If Bsiegel's 'Reset Scroll Position' patch is installed + * then this does what it says on the tin for the middle page. + */ + event.value = middlePage; /* Fudge this because onPageChange expects a + * mojo-property-change event but it's actually + * getting mojo-event-deactivate. + */ + this.onPageChange(event); + }, +

	/* clean and hide global search */
	onDeactivate: function(event) {
	

</source>