Add option in viewer to directly show a plugin page
Testing Done:
Ran `gplugin-gtk4-viewer -p gplugin/native-basic-plugin` and it opened the `basic plugin (C)` page directly.
Ran `gplugin-gtk4-viewer -p asfalskjf` and it exited with an error.
Reviewed at https://reviews.imfreedom.org/r/2148/
/*
* Copyright (C) 2011-2020 Gary Kramlich <grim@reaperworld.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <https://www.gnu.org/licenses/>.
*/
#include<gplugin/gplugin-core.h>
#include<gplugin/gplugin-loader.h>
/**
* GPluginLoader:
*
* An abstract class that should not be accessed directly.
*/
/**
* GPluginLoaderClass:
* @supported_extensions: The supported_extensions vfunc returns a #GList of
* file extensions that this loader supports without the
* leading dot. For example: 'so', 'dll', 'py', etc.
* @query: The query vfunc is called when the plugin manager needs to query a
* plugin that has a file extension from @supported_extensions.
* @load: The load vfunc is called when the plugin manager wants to load a
* plugin that was previously queried by this loader.
* @unload: The unload vfunc is called when the plugin manager wants to unload
* a previously loaded plugin from this loader.
*
* #GPluginLoaderClass defines the behavior for loading plugins.