geany/src/msgwindow.c

/*
 *      msgwindow.c - this file is part of Geany, a fast and lightweight IDE
 *
 *      Copyright 2005-2008 Enrico Tröger <enrico(dot)troeger(at)uvena(dot)de>
 *      Copyright 2006-2008 Nick Treleaven <nick(dot)treleaven(at)btinternet(dot)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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * $Id$
 */

/*
 * Message window functions (status, compiler, messages windows).
 * Also compiler error message parsing and grep file and line parsing.
 */

#include <time.h>

#include "geany.h"

#include "support.h"
#include "prefs.h"
#include "callbacks.h"
#include "msgwindow.h"
#include "ui_utils.h"
#include "utils.h"
#include "document.h"
#include "filetypes.h"
#include "build.h"
#include "main.h"
#include "vte.h"
#include "navqueue.h"
#include "editor.h"

#include <string.h>
#include <stdlib.h>



/* used for parse_file_line */
typedef struct
{
	const gchar *string;	/* line data */
	const gchar *dir;		/* working directory when string was generated */
	const gchar *pattern;	/* pattern to split the error message into some fields */
	guint min_fields;		/* used to detect errors after parsing */
	guint line_idx;			/* idx of the field where the line is */
	gint file_idx;			/* idx of the field where the filename is or -1 */
} ParseData;

MessageWindow msgwindow;


static void prepare_msg_tree_view(void);
static void prepare_status_tree_view(void);
static void prepare_compiler_tree_view(void);
static GtkWidget *create_message_popup_menu(gint type);
static void msgwin_parse_grep_line(const gchar *string, gchar **filename, gint *line);
static gboolean on_msgwin_button_press_event(GtkWidget *widget, GdkEventButton *event,
																			gpointer user_data);
static void on_scribble_populate(GtkTextView *textview, GtkMenu *arg1, gpointer user_data);


void msgwin_init()
{
	msgwindow.notebook = lookup_widget(app->window, "notebook_info");
	msgwindow.tree_status = lookup_widget(app->window, "treeview3");
	msgwindow.tree_msg = lookup_widget(app->window, "treeview4");
	msgwindow.tree_compiler = lookup_widget(app->window, "treeview5");
	msgwindow.find_in_files_dir = NULL;

	gtk_widget_set_sensitive(lookup_widget(app->window, "next_message1"), FALSE);

	prepare_status_tree_view();
	prepare_msg_tree_view();
	prepare_compiler_tree_view();
	msgwindow.popup_status_menu = create_message_popup_menu(MSG_STATUS);
	msgwindow.popup_msg_menu = create_message_popup_menu(MSG_MESSAGE);
	msgwindow.popup_compiler_menu = create_message_popup_menu(MSG_COMPILER);

	g_signal_connect(G_OBJECT(lookup_widget(app->window, "textview_scribble")),
		"populate-popup", G_CALLBACK(on_scribble_populate), NULL);
}


void msgwin_finalize()
{
	g_free(msgwindow.find_in_files_dir);
}


/* does some preparing things to the status message list widget */
static void prepare_status_tree_view(void)
{
	GtkCellRenderer *renderer;
	GtkTreeViewColumn *column;
	PangoFontDescription *pfd;

	msgwindow.store_status = gtk_list_store_new(1, G_TYPE_STRING);
	gtk_tree_view_set_model(GTK_TREE_VIEW(msgwindow.tree_status), GTK_TREE_MODEL(msgwindow.store_status));

	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes(_("Status messages"), renderer, "text", 0, NULL);
	gtk_tree_view_append_column(GTK_TREE_VIEW(msgwindow.tree_status), column);

	gtk_tree_view_set_enable_search(GTK_TREE_VIEW(msgwindow.tree_status), FALSE);

	pfd = pango_font_description_from_string(interface_prefs.msgwin_font);
	gtk_widget_modify_font(msgwindow.tree_status, pfd);
	pango_font_description_free(pfd);

	g_signal_connect(G_OBJECT(msgwindow.tree_status), "button-press-event",
				G_CALLBACK(on_msgwin_button_press_event), GINT_TO_POINTER(MSG_STATUS));
}


/* does some preparing things to the message list widget
 * (currently used for showing results of 'Find usage') */
static void prepare_msg_tree_view(void)
{
	GtkCellRenderer *renderer;
	GtkTreeViewColumn *column;
	GtkTreeSelection *selection;
	PangoFontDescription *pfd;

	/* doc idx, line, fg, str */
	msgwindow.store_msg = gtk_list_store_new(4, G_TYPE_INT, G_TYPE_INT,
		GDK_TYPE_COLOR, G_TYPE_STRING);
	gtk_tree_view_set_model(GTK_TREE_VIEW(msgwindow.tree_msg), GTK_TREE_MODEL(msgwindow.store_msg));

	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes(NULL, renderer,
		"foreground-gdk", 2, "text", 3, NULL);
	gtk_tree_view_append_column(GTK_TREE_VIEW(msgwindow.tree_msg), column);

	gtk_tree_view_set_enable_search(GTK_TREE_VIEW(msgwindow.tree_msg), FALSE);

	pfd = pango_font_description_from_string(interface_prefs.msgwin_font);
	gtk_widget_modify_font(msgwindow.tree_msg, pfd);
	pango_font_description_free(pfd);

	/* use button-release-event so the selection has changed
	 * (connect_after button-press-event doesn't work) */
	g_signal_connect(G_OBJECT(msgwindow.tree_msg), "button-release-event",
					G_CALLBACK(on_msgwin_button_press_event), GINT_TO_POINTER(MSG_MESSAGE));

	/* selection handling */
	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(msgwindow.tree_msg));
	gtk_tree_selection_set_mode(selection, GTK_SELECTION_SINGLE);
	/*g_signal_connect(G_OBJECT(selection), "changed",G_CALLBACK(on_msg_tree_selection_changed), NULL);*/
}


/* does some preparing things to the compiler list widget */
static void prepare_compiler_tree_view(void)
{
	GtkCellRenderer *renderer;
	GtkTreeViewColumn *column;
	GtkTreeSelection *selection;
	PangoFontDescription *pfd;

	msgwindow.store_compiler = gtk_list_store_new(2, GDK_TYPE_COLOR, G_TYPE_STRING);
	gtk_tree_view_set_model(GTK_TREE_VIEW(msgwindow.tree_compiler), GTK_TREE_MODEL(msgwindow.store_compiler));

	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes(NULL, renderer, "foreground-gdk", 0, "text", 1, NULL);
	gtk_tree_view_append_column(GTK_TREE_VIEW(msgwindow.tree_compiler), column);

	gtk_tree_view_set_enable_search(GTK_TREE_VIEW(msgwindow.tree_compiler), FALSE);

	pfd = pango_font_description_from_string(interface_prefs.msgwin_font);
	gtk_widget_modify_font(msgwindow.tree_compiler, pfd);
	pango_font_description_free(pfd);

	/* use button-release-event so the selection has changed
	 * (connect_after button-press-event doesn't work) */
	g_signal_connect(G_OBJECT(msgwindow.tree_compiler), "button-release-event",
					G_CALLBACK(on_msgwin_button_press_event), GINT_TO_POINTER(MSG_COMPILER));

	/* selection handling */
	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(msgwindow.tree_compiler));
	gtk_tree_selection_set_mode(selection, GTK_SELECTION_SINGLE);
	/*g_signal_connect(G_OBJECT(selection), "changed", G_CALLBACK(on_msg_tree_selection_changed), NULL);*/
}


static const GdkColor color_error = {0, 65535, 0, 0};

static const GdkColor *get_color(gint msg_color)
{
	static const GdkColor dark_red = {0, 65535 / 2, 0, 0};
	static const GdkColor blue = {0, 0, 0, 0xD000};	/* not too bright ;-) */
	static const GdkColor black = {0, 0, 0, 0};

	switch (msg_color)
	{
		case COLOR_RED: return &color_error;
		case COLOR_DARK_RED: return &dark_red;
		case COLOR_BLUE: return &blue;
		default: return &black;
	}
}


/**
 *  Adds a new message in the compiler tab treeview in the messages window.
 *
 *  @param msg_color A color to be used for the text. It must be an element of #MsgColors.
 *  @param format Printf()-style format string.
 *  @param ... Arguments for the @c format string.
 **/
void msgwin_compiler_add_fmt(gint msg_color, const gchar *format, ...)
{
	gchar string[512];
	va_list args;

	va_start(args, format);
	g_vsnprintf(string, 512, format, args);
	va_end(args);
	msgwin_compiler_add(msg_color, string);
}


void msgwin_compiler_add(gint msg_color, const gchar *msg)
{
	GtkTreeIter iter;
	GtkTreePath *path;
	const GdkColor *color = get_color(msg_color);

	gtk_list_store_append(msgwindow.store_compiler, &iter);
	gtk_list_store_set(msgwindow.store_compiler, &iter, 0, color, 1, msg, -1);

	if (ui_prefs.msgwindow_visible)
	{
		path = gtk_tree_model_get_path(
			gtk_tree_view_get_model(GTK_TREE_VIEW(msgwindow.tree_compiler)), &iter);
		gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(msgwindow.tree_compiler), path, NULL, TRUE, 0.5, 0.5);
		gtk_tree_path_free(path);
	}

	/* calling build_menu_update for every build message would be overkill */
	gtk_widget_set_sensitive(build_get_menu_items(-1)->item_next_error, TRUE);
}


void msgwin_show_hide(gboolean show)
{
	ui_prefs.msgwindow_visible = show;
	app->ignore_callback = TRUE;
	gtk_check_menu_item_set_active(
		GTK_CHECK_MENU_ITEM(lookup_widget(app->window, "menu_show_messages_window1")),
		show);
	app->ignore_callback = FALSE;
	ui_widget_show_hide(lookup_widget(app->window, "scrolledwindow1"), show);
}


/**
 *  Adds a new message in the messages tab treeview in the messages window.
 *  If @c line and @c idx are set, clicking on this line jumps into the file which is specified
 *  by @c idx into the line specified with @c line.
 *
 *  @param msg_color A color to be used for the text. It must be an element of #MsgColors.
 *  @param line The document's line where the message belongs to. Set to -1 to ignore.
 *  @param idx The document's index in the doc_array. Set to -1 to ignore.
 *  @param format Printf()-style format string.
 *  @param ... Arguments for the @c format string.
 **/
void msgwin_msg_add_fmt(gint msg_color, gint line, gint idx, const gchar *format, ...)
{
	gchar string[512];
	va_list args;

	va_start(args, format);
	g_vsnprintf(string, 512, format, args);
	va_end(args);

	msgwin_msg_add(msg_color, line, idx, string);
}


/* adds string to the msg treeview */
void msgwin_msg_add(gint msg_color, gint line, gint idx, const gchar *string)
{
	GtkTreeIter iter;
	const GdkColor *color = get_color(msg_color);
	gchar *tmp;

	if (! ui_prefs.msgwindow_visible) msgwin_show_hide(TRUE);

	/* work around a strange problem when adding very long lines(greater than 4000 bytes)
	 * cut the string to a maximum of 1024 bytes and discard the rest */
	/** TODO find the real cause for the display problem / if it is GtkTreeView file a bug report */
	if (strlen(string) > 1024)
		tmp = g_strndup(string, 1024);
	else
		tmp = g_strdup(string);

	gtk_list_store_append(msgwindow.store_msg, &iter);
	gtk_list_store_set(msgwindow.store_msg, &iter, 0, line, 1, idx, 2, color, 3, tmp, -1);

	gtk_widget_set_sensitive(lookup_widget(app->window, "next_message1"), TRUE);

	g_free(tmp);
}


/**
 *  Log a status message *without* setting the status bar.
 *  (Use ui_set_statusbar() to display text on the statusbar)
 *
 *  @param format Printf()-style format string.
 *  @param ... Arguments for the @c format string.
 **/
void msgwin_status_add(const gchar *format, ...)
{
	GtkTreeIter iter;
	gchar string[512];
	gchar *statusmsg, *time_str;
	va_list args;

	va_start(args, format);
	g_vsnprintf(string, 512, format, args);
	va_end(args);

	/* add a timestamp to status messages */
	time_str = utils_get_current_time_string();
	if (time_str == NULL)
		statusmsg = g_strdup(string);
	else
		statusmsg = g_strconcat(time_str, ": ", string, NULL);
	g_free(time_str);

	/* add message to Status window */
	gtk_list_store_append(msgwindow.store_status, &iter);
	gtk_list_store_set(msgwindow.store_status, &iter, 0, statusmsg, -1);
	g_free(statusmsg);

	if (main_status.main_window_realized)
	{
		GtkTreePath *path = gtk_tree_model_get_path(gtk_tree_view_get_model(GTK_TREE_VIEW(msgwindow.tree_status)), &iter);

		gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(msgwindow.tree_status), path, NULL, FALSE, 0.0, 0.0);
		if (prefs.switch_to_status) gtk_notebook_set_current_page(GTK_NOTEBOOK(msgwindow.notebook), MSG_STATUS);
		gtk_tree_path_free(path);
	}
}


static void
on_message_treeview_clear_activate     (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
	gint tabnum = GPOINTER_TO_INT(user_data);

	msgwin_clear_tab(tabnum);
}


static void
on_compiler_treeview_copy_activate     (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
	GtkWidget *tv = NULL;
	GtkTreeSelection *selection;
	GtkTreeModel *model;
	GtkTreeIter iter;
	gint str_idx = 1;

	switch (GPOINTER_TO_INT(user_data))
	{
		case MSG_STATUS:
		tv = msgwindow.tree_status;
		str_idx = 0;
		break;

		case MSG_COMPILER:
		tv = msgwindow.tree_compiler;
		break;

		case MSG_MESSAGE:
		tv = msgwindow.tree_msg;
		str_idx = 3;
		break;
	}
	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tv));

	if (gtk_tree_selection_get_selected(selection, &model, &iter))
	{
		gchar *string;

		gtk_tree_model_get(model, &iter, str_idx, &string, -1);
		if (string && *string)
		{
			gtk_clipboard_set_text(gtk_clipboard_get(gdk_atom_intern("CLIPBOARD", FALSE)),
				string, -1);
		}
		g_free(string);
	}
}


static void
on_hide_message_window                 (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
	msgwin_show_hide(FALSE);
}


static GtkWidget *create_message_popup_menu(gint type)
{
	GtkWidget *message_popup_menu, *clear, *copy;

	message_popup_menu = gtk_menu_new();

	clear = gtk_image_menu_item_new_from_stock("gtk-clear", NULL);
	gtk_widget_show(clear);
	gtk_container_add(GTK_CONTAINER(message_popup_menu), clear);
	g_signal_connect((gpointer)clear, "activate",
		G_CALLBACK(on_message_treeview_clear_activate), GINT_TO_POINTER(type));

	copy = gtk_image_menu_item_new_from_stock("gtk-copy", NULL);
	gtk_widget_show(copy);
	gtk_container_add(GTK_CONTAINER(message_popup_menu), copy);
	g_signal_connect((gpointer)copy, "activate",
		G_CALLBACK(on_compiler_treeview_copy_activate), GINT_TO_POINTER(type));

	msgwin_menu_add_common_items(GTK_MENU(message_popup_menu));

	return message_popup_menu;
}


static void on_scribble_populate(GtkTextView *textview, GtkMenu *arg1, gpointer user_data)
{
	msgwin_menu_add_common_items(arg1);
}


/* Menu items that should be on all message window popup menus */
void msgwin_menu_add_common_items(GtkMenu *menu)
{
	GtkWidget *item;

	item = gtk_separator_menu_item_new();
	gtk_widget_show(item);
	gtk_container_add(GTK_CONTAINER(menu), item);

	item = gtk_menu_item_new_with_mnemonic(_("_Hide Message Window"));
	gtk_widget_show(item);
	gtk_container_add(GTK_CONTAINER(menu), item);
	g_signal_connect((gpointer)item, "activate",
		G_CALLBACK(on_hide_message_window), NULL);
}


/* look back up from the current path and find the directory we came from */
static gboolean
find_prev_build_dir(GtkTreePath *cur, GtkTreeModel *model, gchar **prefix)
{
	GtkTreeIter iter;
	*prefix = NULL;

	while (gtk_tree_path_prev(cur))
	{
		if (gtk_tree_model_get_iter(model, &iter, cur))
		{
			gchar *string;
			gtk_tree_model_get(model, &iter, 1, &string, -1);
			if (string != NULL && build_parse_make_dir(string, prefix))
			{
				g_free(string);
				return TRUE;
			}
			g_free(string);
		}
	}

	return FALSE;
}


gboolean msgwin_goto_compiler_file_line()
{
	GtkTreeIter iter;
	GtkTreeModel *model;
	GtkTreeSelection *selection;
	gchar *string;
	gboolean ret = FALSE;
	GdkColor *color;
	gint old_idx = document_get_cur_idx();

	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(msgwindow.tree_compiler));
	if (gtk_tree_selection_get_selected(selection, &model, &iter))
	{
		/* if the item is not coloured red, it's not an error line */
		gtk_tree_model_get(model, &iter, 0, &color, -1);
		if (! gdk_color_equal(color, &color_error))
		{
			gdk_color_free(color);
			return FALSE;
		}
		gdk_color_free(color);

		gtk_tree_model_get(model, &iter, 1, &string, -1);
		if (string != NULL)
		{
			gint line;
			gint idx;
			gchar *filename, *dir;
			GtkTreePath *path;

			path = gtk_tree_model_get_path(model, &iter);
			find_prev_build_dir(path, model, &dir);
			gtk_tree_path_free(path);
			msgwin_parse_compiler_error_line(string, dir, &filename, &line);

			if (dir != NULL)
				g_free(dir);

			if (filename != NULL && line > -1)
			{
				gchar *utf8_filename = utils_get_utf8_from_locale(filename);
				idx = document_find_by_filename(utf8_filename, FALSE);
				g_free(utf8_filename);

				if (idx < 0)	/* file not already open */
					idx = document_open_file(filename, FALSE, NULL, NULL);

				if (DOC_IDX_VALID(idx))
				{
					if (! doc_list[idx].changed)	/* if modified, line may be wrong */
						editor_set_indicator_on_line(idx, line - 1);

					ret = navqueue_goto_line(old_idx, idx, line);
				}
			}
			g_free(filename);
		}
		g_free(string);
	}
	return ret;
}


/* try to parse the file and line number where the error occured described in line
 * and when something useful is found, it stores the line number in *line and the
 * relevant file with the error in *filename.
 * *line will be -1 if no error was found in string.
 * *filename must be freed unless it is NULL. */
static void parse_file_line(ParseData *data, gchar **filename, gint *line)
{
	gchar *end = NULL;
	gchar **fields;
	guint skip_dot_slash = 0;	/* number of characters to skip at the beginning of the filename */

	*filename = NULL;
	*line = -1;

	g_return_if_fail(data->dir != NULL && data->string != NULL);

	fields = g_strsplit_set(data->string, data->pattern, data->min_fields);

	/* parse the line */
	if (g_strv_length(fields) < data->min_fields)
	{
		g_strfreev(fields);
		return;
	}

	*line = strtol(fields[data->line_idx], &end, 10);

	/* if the line could not be read, line is 0 and an error occurred, so we leave */
	if (fields[data->line_idx] == end)
	{
		g_strfreev(fields);
		return;
	}

	/* let's stop here if there is no filename in the error message */
	if (data->file_idx == -1)
	{
		/* we have no filename in the error message, so take the current one and hope it's correct */
		document *doc = document_get_current();
		if (doc != NULL)
			*filename = g_strdup(doc->file_name);
		g_strfreev(fields);
		return;
	}

	/* skip some characters at the beginning of the filename, at the moment only "./"
	 * can be extended if other "trash" is known */
	if (strncmp(fields[data->file_idx], "./", 2) == 0) skip_dot_slash = 2;

	/* get the build directory to get the path to look for other files */
	if (! utils_is_absolute_path(fields[data->file_idx]))
		*filename = g_strconcat(data->dir, G_DIR_SEPARATOR_S,
			fields[data->file_idx] + skip_dot_slash, NULL);
	else
		*filename = g_strdup(fields[data->file_idx]);

	g_strfreev(fields);
}


/* try to parse the file and line number where the error occured described in string
 * and when something useful is found, it stores the line number in *line and the
 * relevant file with the error in *filename.
 * *line will be -1 if no error was found in string.
 * *filename must be freed unless it is NULL. */
void msgwin_parse_compiler_error_line(const gchar *string, const gchar *dir, gchar **filename, gint *line)
{
	ParseData data = {NULL, NULL, NULL, 0, 0, 0};

	data.string = string;
	data.dir = build_info.dir;

	*filename = NULL;
	*line = -1;

	if (dir != NULL)
		data.dir = dir;

	g_return_if_fail(build_info.dir != NULL || dir != NULL);
	if (string == NULL) return;

	switch (build_info.file_type_id)
	{
		case GEANY_FILETYPES_PHP:
		{
			/* Parse error: parse error, unexpected T_CASE in brace_bug.php on line 3
			 * Parse error: syntax error, unexpected T_LNUMBER, expecting T_FUNCTION in bob.php on line 16 */
			gchar *tmp = strstr(string, " in ");

			if(tmp != NULL)
			{
				data.string = tmp;
				data.pattern = " ";
				data.min_fields = 6;
				data.line_idx = 5;
				data.file_idx = 2;
			}
			else
			{
				data.pattern = " ";
				data.min_fields = 11;
				data.line_idx = 10;
				data.file_idx = 7;
			}
			break;
		}
		case GEANY_FILETYPES_PERL:
		{
			/* syntax error at test.pl line 7, near "{ */
			data.pattern = " ";
			data.min_fields = 6;
			data.line_idx = 5;
			data.file_idx = 3;
			break;
		}
		/* the error output of python and tcl equals */
		case GEANY_FILETYPES_TCL:
		case GEANY_FILETYPES_PYTHON:
		{
			/* File "HyperArch.py", line 37, in ?
			 * (file "clrdial.tcl" line 12) */
			data.pattern = " \"";
			data.min_fields = 6;
			data.line_idx = 5;
			data.file_idx = 2;
			break;
		}
		case GEANY_FILETYPES_BASIC:
		case GEANY_FILETYPES_PASCAL:
		{
			/* getdrive.bas(52) error 18: Syntax error in '? GetAllDrives'
			 * bandit.pas(149,3) Fatal: Syntax error, ";" expected but "ELSE" found */
			data.pattern = "(";
			data.min_fields = 2;
			data.line_idx = 1;
			data.file_idx = 0;
			break;
		}
		case GEANY_FILETYPES_D:
		{
			/* GNU D compiler front-end, gdc
			 * gantry.d:18: variable gantry.main.c reference to auto class must be auto
			 * warning - gantry.d:20: statement is not reachable
			 * Digital Mars dmd compiler
			 * warning - pi.d(118): implicit conversion of expression (digit) of type int ...
			 * gantry.d(18): variable gantry.main.c reference to auto class must be auto */
			if (strncmp(string, "warning - ", 10) == 0)
			{
				data.pattern = " (:";
				data.min_fields = 4;
				data.line_idx = 3;
				data.file_idx = 2;
			}
			else
			{
				data.pattern = "(:";
				data.min_fields = 2;
				data.line_idx = 1;
				data.file_idx = 0;
			}
			break;
		}
		case GEANY_FILETYPES_FERITE:
		{
			/* Error: Parse Error: on line 5 in "/tmp/hello.fe"
			 * Error: Compile Error: on line 24, in /test/class.fe */
			if (strncmp(string, "Error: Compile Error", 20) == 0)
			{
				data.pattern = " ";
				data.min_fields = 8;
				data.line_idx = 5;
				data.file_idx = 7;
			}
			else
			{
				data.pattern = " \"";
				data.min_fields = 10;
				data.line_idx = 5;
				data.file_idx = 8;
			}
			break;
		}
		case GEANY_FILETYPES_HTML:
		{
			/* line 78 column 7 - Warning: <table> missing '>' for end of tag */
			data.pattern = " ";
			data.min_fields = 4;
			data.line_idx = 1;
			data.file_idx = -1;
			break;
		}
		/* All GNU gcc-like error messages */
		case GEANY_FILETYPES_C:
		case GEANY_FILETYPES_CPP:
		case GEANY_FILETYPES_RUBY:
		case GEANY_FILETYPES_JAVA:
			/* only gcc is supported, I don't know any other C(++) compilers and their error messages
			 * empty.h:4: Warnung: type defaults to `int' in declaration of `foo'
			 * empty.c:21: error: conflicting types for `foo'
			 * Only parse file and line, so that linker errors will also work (with -g) */
		case GEANY_FILETYPES_FORTRAN:
		case GEANY_FILETYPES_LATEX:
			/* ./kommtechnik_2b.tex:18: Emergency stop. */
		case GEANY_FILETYPES_MAKE:	/* Assume makefile is building with gcc */
		case GEANY_FILETYPES_NONE:
		default:	/* The default is a GNU gcc type error */
		{
			if (build_info.file_type_id == GEANY_FILETYPES_JAVA &&
				strncmp(string, "[javac]", 7) == 0)
			{
				/* Java Apache Ant.
				 * [javac] <Full Path to File + extension>:<line n°>: <error> */
				data.pattern = " :";
				data.min_fields = 4;
				data.line_idx = 2;
				data.file_idx = 1;
				break;
			}
			/* don't accidently find libtool versions x:y:x and think it is a file name */
			if (strstr(string, "libtool --mode=link") == NULL)
			{
				data.pattern = ":";
				data.min_fields = 3;
				data.line_idx = 1;
				data.file_idx = 0;
				break;
			}
		}
	}

	if (data.pattern != NULL)
		parse_file_line(&data, filename, line);
}


gboolean msgwin_goto_messages_file_line()
{
	GtkTreeIter iter;
	GtkTreeModel *model;
	GtkTreeSelection *selection;
	gboolean ret = FALSE;

	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(msgwindow.tree_msg));
	if (gtk_tree_selection_get_selected(selection, &model, &iter))
	{
		gint idx, line, old_idx = document_get_cur_idx();
		gchar *string;

		gtk_tree_model_get(model, &iter, 0, &line, 1, &idx, 3, &string, -1);
		if (line >= 0 && idx >= 0)
		{
			if (DOC_IDX_VALID(idx))
				ret = navqueue_goto_line(old_idx, idx, line);
		}
		else if (line < 0 && string != NULL)
		{
			gchar *filename;
			msgwin_parse_grep_line(string, &filename, &line);
			if (filename != NULL && line > -1)
			{
				/* use document_open_file to find an already open file, or open it in place */
				idx = document_open_file(filename, FALSE, NULL, NULL);
				if (DOC_IDX_VALID(idx))
					ret = navqueue_goto_line(old_idx, idx, line);
			}
			g_free(filename);
		}
		g_free(string);
	}
	return ret;
}


/* Try to parse the file and line number for string and when something useful is
 * found, store the line number in *line and the relevant file with the error in
 * *filename.
 * *line will be -1 if no error was found in string.
 * *filename must be freed unless NULL. */
static void msgwin_parse_grep_line(const gchar *string, gchar **filename, gint *line)
{
	ParseData data;

	*filename = NULL;
	*line = -1;

	if (string == NULL || msgwindow.find_in_files_dir == NULL) return;

	/* conflict:3:conflicting types for `foo' */
	data.string = string;
	data.dir = msgwindow.find_in_files_dir;
	data.pattern = ":";
	data.min_fields = 3;
	data.line_idx = 1;
	data.file_idx = 0;

	parse_file_line(&data, filename, line);
}


static gboolean on_msgwin_button_press_event(GtkWidget *widget, GdkEventButton *event,
																			gpointer user_data)
{
	/* user_data might be NULL, GPOINTER_TO_INT returns 0 if called with NULL */

	if (event->button == 1)
	{
		switch (GPOINTER_TO_INT(user_data))
		{
			case MSG_COMPILER:
			{	/* single click in the compiler treeview */
				msgwin_goto_compiler_file_line();
				break;
			}
			case MSG_MESSAGE:
			{	/* single click in the message treeview (results of 'Find usage') */
				msgwin_goto_messages_file_line();
				break;
			}
		}
	}

	if (event->button == 3)
	{	/* popupmenu to hide or clear the active treeview */
		switch (GPOINTER_TO_INT(user_data))
		{
			case MSG_STATUS:
			{
				gtk_menu_popup(GTK_MENU(msgwindow.popup_status_menu), NULL, NULL, NULL, NULL,
																	event->button, event->time);
				break;
			}
			case MSG_MESSAGE:
			{
				gtk_menu_popup(GTK_MENU(msgwindow.popup_msg_menu), NULL, NULL, NULL, NULL,
																	event->button, event->time);
				break;
			}
			case MSG_COMPILER:
			{
				gtk_menu_popup(GTK_MENU(msgwindow.popup_compiler_menu), NULL, NULL, NULL, NULL,
																	event->button, event->time);
				break;
			}
		}
	}
	return FALSE;
}


/**
 *  Switches to the given notebook tab of the messages window and shows the messages window
 *  if it was previously hidden and @c show is set to @a TRUE.
 *
 *  @param tabnum An index of a tab in the messages window. Valid values are all elements of
 *                #MessageWindowTabNum.
 *  @param show Whether to show the messages window at all if it was hidden before.
 **/
void msgwin_switch_tab(gint tabnum, gboolean show)
{
	GtkWidget *widget = NULL;	/* widget to focus */

	switch (tabnum)
	{
		case MSG_SCRATCH: widget = lookup_widget(app->window, "textview_scribble"); break;
#ifdef HAVE_VTE
		case MSG_VTE: widget = (vte_info.have_vte) ? vc->vte : NULL; break;
#endif
		default: break;
	}

	/* the msgwin must be visible before we switch to the VTE page so that
	 * the font settings are applied on realization */
	if (show)
		msgwin_show_hide(TRUE);
	gtk_notebook_set_current_page(GTK_NOTEBOOK(msgwindow.notebook), tabnum);
	if (show && widget)
		gtk_widget_grab_focus(widget);
}

/**
 *  Removes all messages from a tab specified by @c tabnum in the messages window.
 *
 *  @param tabnum An index of a tab in the messages window which should be cleared.
 *                Valid values are @a MSG_STATUS, @a MSG_COMPILER and @a MSG_MESSAGE.
 **/
void msgwin_clear_tab(gint tabnum)
{
	GtkListStore *store = NULL;

	switch (tabnum)
	{
		case MSG_MESSAGE:
			gtk_widget_set_sensitive(lookup_widget(app->window, "next_message1"), FALSE);
			store = msgwindow.store_msg;
			break;

		case MSG_COMPILER:
			gtk_widget_set_sensitive(build_get_menu_items(-1)->item_next_error, FALSE);
			store = msgwindow.store_compiler;
			break;

		case MSG_STATUS: store = msgwindow.store_status; break;
		default: return;
	}
	if (store == NULL)
		return;
	gtk_list_store_clear(store);
}