/*
 *      plugindata.h - this file is part of Geany, a fast and lightweight IDE
 *
 *      Copyright 2007 Enrico Tröger <enrico.troeger@uvena.de>
 *      Copyright 2007 Nick Treleaven <nick.treleaven@btinternet.com>
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *
 *      This program 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 General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 *
 * $Id$
 */

#ifndef PLUGIN_H
#define PLUGIN_H

/**
 * Public symbols supported:
 *
 * version_check()
 * 	Use VERSION_CHECK() macro instead. Required by Geany.
 *
 * PluginInfo* info()
 * 	Use PLUGIN_INFO() macro to define it. Required by Geany.
 *
 * PluginFields* plugin_fields
 * 	Plugin owned fields, including flags.
 *
 * void init(PluginData *data)
 * 	Called after loading the plugin.
 *
 * void cleanup()
 * 	Called before unloading the plugin.
 */


/* The API version should be incremented whenever any plugin data types below are
 * modified. */
static const gint api_version = 5;

/* The ABI version should be incremented whenever existing fields in the plugin
 * data types below have to be changed or reordered. It should stay the same if fields
 * are only appended, as this doesn't affect existing fields. */
static const gint abi_version = 2;

/* This performs runtime checks that try to ensure:
 * 1. Geany ABI data types are compatible with this plugin.
 * 2. Geany sources provide the required API for this plugin. */
/* TODO: if possible, the API version should be checked at compile time, not runtime. */
#define VERSION_CHECK(api_required) \
	gint version_check(gint abi_ver) \
	{ \
		if (abi_ver != abi_version) \
			return -1; \
		if (api_version < (api_required)) \
			return (api_required); \
		else return 0; \
	}


typedef struct PluginInfo
{
	gchar	*name;			// name of plugin
	gchar	*description;	// description of plugin
}
PluginInfo;

/* Sets the plugin name and a brief description of what it is. */
#define PLUGIN_INFO(p_name, p_description) \
	PluginInfo *info() \
	{ \
		static PluginInfo p_info; \
		 \
		p_info.name = (p_name); \
		p_info.description = (p_description); \
		return &p_info; \
	}


typedef enum
{
	PLUGIN_IS_DOCUMENT_SENSITIVE	= 1 << 0	// if menu_item should be disabled when there are no documents
}
PluginFlags;

/* Fields set and owned by the plugin */
typedef struct PluginFields
{
	PluginFlags	flags;
	GtkWidget	*menu_item;	// (optional) widget to be destroyed after unloading the plugin
}
PluginFields;


typedef struct DocumentFuncs	DocumentFuncs;
typedef struct ScintillaFuncs	ScintillaFuncs;
typedef struct TemplateFuncs	TemplateFuncs;
typedef struct UtilsFuncs		UtilsFuncs;
typedef struct UIUtilsFuncs		UIUtilsFuncs;

/* These are fields and functions owned by Geany.
 * Fields will be appended when needed by plugin authors.
 * Note: Remember to increment api_version (and abi_version if necessary) when
 * making changes. */
typedef struct PluginData
{
	MyApp		*app;	// Geany application data fields
	GtkWidget	*tools_menu;	// Almost all plugins should add menu items to the Tools menu only
	GArray		*doc_array;	// array of document pointers

	DocumentFuncs	*document;
	ScintillaFuncs	*sci;
	TemplateFuncs	*templates;
	UtilsFuncs		*utils;
	UIUtilsFuncs	*ui;
}
PluginData;


/* For more info about these functions, see the main source code.
 * E.g. for PluginData::document->new_file(), see document_new_file() in document.[hc]. */

struct filetype;

struct DocumentFuncs
{
	gint (*new_file) (const gchar *filename, struct filetype *ft);
	gint (*get_cur_idx) ();
};

struct _ScintillaObject;

struct ScintillaFuncs
{
	void	(*set_text) (struct _ScintillaObject *sci, const gchar *text);
	void	(*insert_text) (struct _ScintillaObject *sci, gint pos, const gchar *text);
	gint	(*get_current_position) (struct _ScintillaObject *sci);
};

struct TemplateFuncs
{
	gchar*	(*get_template_fileheader) (gint filetype_idx, const gchar *fname);
};

struct UtilsFuncs
{
	gboolean	(*str_equal) (const gchar *a, const gchar *b);
	gchar*		(*str_replace) (gchar *haystack, const gchar *needle, const gchar *replacement);
};

struct UIUtilsFuncs
{
	GtkWidget*	(*dialog_vbox_new) (GtkDialog *dialog);
	GtkWidget*	(*frame_new_with_alignment) (const gchar *label_text, GtkWidget **alignment);
};

#endif