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extensionUtils: Allow getCurrentExtension() to be called from anyone

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Currently it's assumed only an extension can call this method. However
it can be useful if any part of the shell want to know if it was invoked
by an extension.

https://bugzilla.gnome.org/show_bug.cgi?id=770717
This commit is contained in:
Jonh Wendell 2016-10-03 20:08:18 -03:00
parent 384e01b368
commit c405081d89
1 changed files with 18 additions and 7 deletions
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25
js/misc/extensionUtils.js
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@ -21,14 +21,25 @@ const ExtensionType = {
// Maps uuid -> metadata object
const extensions = {};
/**
* getCurrentExtension:
*
* Returns the current extension, or null if not called from an extension.
*/
function getCurrentExtension() {
let stack = (new Error()).stack;
let stack = (new Error()).stack.split('\n');
let extensionStackLine;
// Assuming we're importing this directly from an extension (and we shouldn't
// ever not be), its UUID should be directly in the path here.
let extensionStackLine = stack.split('\n')[1];
// Search for an occurrence of an extension stack frame
// Start at 1 because 0 is the stack frame of this function
for (let i = 1; i < stack.length; i++) {
if (stack[i].indexOf('/gnome-shell/extensions/') > -1) {
extensionStackLine = stack[i];
break;
}
}
if (!extensionStackLine)
throw new Error('Could not find current extension');
return null;
// The stack line is like:
// init([object Object])@/home/user/data/gnome-shell/extensions/u@u.id/prefs.js:8
@ -38,7 +49,7 @@ function getCurrentExtension() {
// @/home/user/data/gnome-shell/extensions/u@u.id/prefs.js:8
let match = new RegExp('@(.+):\\d+').exec(extensionStackLine);
if (!match)
throw new Error('Could not find current extension');
return null;
let path = match[1];
let file = Gio.File.new_for_path(path);
@ -52,7 +63,7 @@ function getCurrentExtension() {
file = file.get_parent();
}
throw new Error('Could not find current extension');
return null;
}
/**