Desktop
/* $Id: editor.c,v 1.30 2009/08/17 22:40:40 khorben Exp $ */
/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Editor */
/* Editor is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 3 as published by the Free
* Software Foundation.
*
* Editor 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
* Editor; if not, see <http://www.gnu.org/licenses/>. */
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <gdk/gdkkeysyms.h>
#include "callbacks.h"
#include "editor.h"
#include "../config.h"
/* types */
#ifndef EMBEDDED
struct _menu
{
char * name;
GtkSignalFunc callback;
char * stock;
unsigned int accel;
};
struct _menubar
{
char * name;
struct _menu * menu;
};
#endif
/* constants */
#ifndef EMBEDDED
static struct _menu _menu_file[] =
{
{ "_New", G_CALLBACK(on_file_new), GTK_STOCK_NEW, GDK_n },
{ "_Open", G_CALLBACK(on_file_open), GTK_STOCK_OPEN, GDK_o },
{ "", NULL, NULL, 0 },
{ "_Save", G_CALLBACK(on_file_save), GTK_STOCK_SAVE, GDK_s },
{ "_Save as...", G_CALLBACK(on_file_save_as), GTK_STOCK_SAVE_AS,
GDK_S },
{ "", NULL, NULL, 0 },
{ "_Close", G_CALLBACK(on_file_close), GTK_STOCK_CLOSE, 0 },
{ NULL, NULL, NULL, 0 }
};
static struct _menu _menu_edit[] =
{
{ "_Undo", NULL, GTK_STOCK_UNDO, GDK_z }, /* FIXME implement */
{ "_Redo", NULL, GTK_STOCK_REDO, GDK_r }, /* FIXME implement */
{ "", NULL, NULL, 0 },
{ "_Cut", NULL, GTK_STOCK_CUT, 0 }, /* FIXME implement */
{ "_Copy", NULL, GTK_STOCK_COPY, 0 }, /* FIXME implement */
{ "_Paste", NULL, GTK_STOCK_PASTE, 0 }, /* FIXME implement */
{ "", NULL, NULL, 0 },
{ "_Preferences", G_CALLBACK(on_edit_preferences),
GTK_STOCK_PREFERENCES, GDK_p },
{ NULL, NULL, NULL, 0 }
};
static struct _menu _menu_help[] =
{
#if GTK_CHECK_VERSION(2, 6, 0)
{ "_About", G_CALLBACK(on_help_about), GTK_STOCK_ABOUT, 0 },
#else
{ "_About", G_CALLBACK(on_help_about), NULL, 0 },
#endif
{ NULL, NULL, NULL, 0 }
};
static struct _menubar _menubar[] =
{
{ "_File", _menu_file },
{ "_Edit", _menu_edit },
{ "_Help", _menu_help },
{ NULL, NULL }
};
#endif
/* Editor */
/* editor_new */
static void _new_set_title(Editor * editor);
#ifndef EMBEDDED
static GtkWidget * _new_menubar(Editor * editor);
#endif
Editor * editor_new(void)
{
Editor * editor;
GtkSettings * settings;
GtkWidget * vbox;
GtkWidget * toolbar;
GtkToolItem * tb_button;
GtkWidget * widget;
PangoFontDescription * desc;
if((editor = malloc(sizeof(*editor))) == NULL)
return NULL;
editor->font = NULL;
settings = gtk_settings_get_default();
g_object_get(G_OBJECT(settings), "gtk-font-name", &editor->font, NULL);
if(editor->font == NULL)
editor->font = EDITOR_DEFAULT_FONT;
editor->filename = NULL;
/* widgets */
editor->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(editor->window), 600, 400);
_new_set_title(editor);
#if GTK_CHECK_VERSION(2, 6, 0)
gtk_window_set_icon_name(GTK_WINDOW(editor->window), "text-editor");
#endif
g_signal_connect(G_OBJECT(editor->window), "delete-event", G_CALLBACK(
on_closex), editor);
vbox = gtk_vbox_new(FALSE, 0);
/* menubar */
#ifndef EMBEDDED
gtk_box_pack_start(GTK_BOX(vbox), _new_menubar(editor), FALSE, FALSE,
0);
#endif
/* toolbar */
toolbar = gtk_toolbar_new();
tb_button = gtk_tool_button_new_from_stock(GTK_STOCK_NEW);
g_signal_connect(G_OBJECT(tb_button), "clicked", G_CALLBACK(on_new),
editor);
gtk_toolbar_insert(GTK_TOOLBAR(toolbar), tb_button, -1);
tb_button = gtk_tool_button_new_from_stock(GTK_STOCK_OPEN);
g_signal_connect(G_OBJECT(tb_button), "clicked", G_CALLBACK(on_open),
editor);
gtk_toolbar_insert(GTK_TOOLBAR(toolbar), tb_button, -1);
tb_button = gtk_separator_tool_item_new();
gtk_toolbar_insert(GTK_TOOLBAR(toolbar), tb_button, -1);
tb_button = gtk_tool_button_new_from_stock(GTK_STOCK_SAVE);
g_signal_connect(G_OBJECT(tb_button), "clicked", G_CALLBACK(on_save),
editor);
gtk_toolbar_insert(GTK_TOOLBAR(toolbar), tb_button, -1);
tb_button = gtk_tool_button_new_from_stock(GTK_STOCK_SAVE_AS);
g_signal_connect(G_OBJECT(tb_button), "clicked", G_CALLBACK(
on_save_as), editor);
gtk_toolbar_insert(GTK_TOOLBAR(toolbar), tb_button, -1);
gtk_box_pack_start(GTK_BOX(vbox), toolbar, FALSE, FALSE, 0);
/* view */
widget = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(widget),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
editor->view = gtk_text_view_new();
/* FIXME make it an option */
gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(editor->view),
GTK_WRAP_WORD_CHAR);
desc = pango_font_description_from_string(editor->font);
pango_font_description_set_family(desc, "monospace");
editor_set_font(editor, pango_font_description_to_string(desc));
pango_font_description_free(desc);
gtk_container_add(GTK_CONTAINER(widget), editor->view);
gtk_box_pack_start(GTK_BOX(vbox), widget, TRUE, TRUE, 0);
/* statusbar */
editor->statusbar = gtk_statusbar_new();
gtk_box_pack_start(GTK_BOX(vbox), editor->statusbar, FALSE, FALSE, 0);
/* preferences */
editor->pr_window = NULL;
gtk_container_add(GTK_CONTAINER(editor->window), vbox);
gtk_window_set_focus(GTK_WINDOW(editor->window), editor->view);
gtk_widget_show_all(editor->window);
return editor;
}
static void _new_set_title(Editor * editor)
{
char buf[256];
snprintf(buf, sizeof(buf), "%s%s", "Text editor - ", editor->filename
== NULL ? "(Untitled)" : editor->filename);
gtk_window_set_title(GTK_WINDOW(editor->window), buf);
}
#ifndef EMBEDDED
static GtkWidget * _new_menubar(Editor * editor)
{
GtkWidget * tb_menubar;
GtkAccelGroup * group;
GtkWidget * menu;
GtkWidget * menubar;
GtkWidget * menuitem;
unsigned int i;
unsigned int j;
struct _menu * p;
GdkModifierType mt;
tb_menubar = gtk_menu_bar_new();
group = gtk_accel_group_new();
for(i = 0; _menubar[i].name != NULL; i++)
{
menubar = gtk_menu_item_new_with_mnemonic(_menubar[i].name);
menu = gtk_menu_new();
for(j = 0; _menubar[i].menu[j].name != NULL; j++)
{
p = &_menubar[i].menu[j];
if(p->name[0] == '\0')
menuitem = gtk_separator_menu_item_new();
else if(p->stock == 0)
menuitem = gtk_menu_item_new_with_mnemonic(
p->name);
else
menuitem = gtk_image_menu_item_new_from_stock(
p->stock, NULL);
if(p->callback != NULL)
g_signal_connect(G_OBJECT(menuitem), "activate",
G_CALLBACK(p->callback),
editor);
else
gtk_widget_set_sensitive(menuitem, FALSE);
if(p->accel != 0)
{
mt = (p->accel >= GDK_A && p->accel <= GDK_Z)
? GDK_CONTROL_MASK | GDK_SHIFT_MASK
: GDK_CONTROL_MASK;
gtk_widget_add_accelerator(menuitem, "activate",
group, p->accel, mt,
GTK_ACCEL_VISIBLE);
}
gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
}
gtk_menu_item_set_submenu(GTK_MENU_ITEM(menubar), menu);
gtk_menu_bar_append(GTK_MENU_BAR(tb_menubar), menubar);
}
gtk_window_add_accel_group(GTK_WINDOW(editor->window), group);
return tb_menubar;
}
#endif
/* editor_delete */
void editor_delete(Editor * editor)
{
free(editor);
}
/* accessors */
void editor_set_font(Editor * editor, char const * font)
{
PangoFontDescription * desc;
editor->font = font;
desc = pango_font_description_from_string(font);
gtk_widget_modify_font(editor->view, desc);
pango_font_description_free(desc);
}
/* useful */
/* editor_error */
int editor_error(Editor * editor, char const * message, int ret)
{
GtkWidget * dialog;
dialog = gtk_message_dialog_new(GTK_WINDOW(editor->window),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "%s", message);
gtk_window_set_title(GTK_WINDOW(dialog), "Error");
g_signal_connect(G_OBJECT(dialog), "response", G_CALLBACK(
gtk_widget_destroy), NULL);
gtk_widget_show(dialog);
return ret;
}
/* editor_close */
gboolean editor_close(Editor * editor)
{
GtkWidget * dialog;
int res;
if(gtk_text_buffer_get_modified(gtk_text_view_get_buffer(GTK_TEXT_VIEW(
editor->view))) == FALSE)
{
gtk_main_quit();
return FALSE;
}
dialog = gtk_message_dialog_new(GTK_WINDOW(editor->window),
GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_WARNING, GTK_BUTTONS_NONE, "%s",
"There are unsaved changes.\n"
"Are you sure you want to close?");
gtk_dialog_add_buttons(GTK_DIALOG(dialog), GTK_STOCK_CANCEL,
GTK_RESPONSE_CANCEL, GTK_STOCK_CLOSE,
GTK_RESPONSE_CLOSE, NULL);
gtk_window_set_title(GTK_WINDOW(dialog), "Warning");
res = gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
if(res != GTK_RESPONSE_CLOSE)
return TRUE;
gtk_main_quit();
return FALSE;
}
/* editor_open */
void editor_open(Editor * editor, char const * filename)
{
GtkWidget * dialog;
int res;
FILE * fp;
GtkTextBuffer * tbuf;
GtkTextIter iter;
char buf[BUFSIZ];
size_t len;
char * p;
size_t rlen;
size_t wlen;
GError * error = NULL;
if(gtk_text_buffer_get_modified(gtk_text_view_get_buffer(GTK_TEXT_VIEW(
editor->view))) == TRUE)
{
dialog = gtk_message_dialog_new(GTK_WINDOW(editor->window),
GTK_DIALOG_MODAL
| GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_WARNING, GTK_BUTTONS_NONE, "%s",
"There are unsaved changes.\n"
"Are you sure you want to discard them?");
gtk_dialog_add_buttons(GTK_DIALOG(dialog), GTK_STOCK_CANCEL,
GTK_RESPONSE_CANCEL, GTK_STOCK_DISCARD,
GTK_RESPONSE_CLOSE, NULL);
gtk_window_set_title(GTK_WINDOW(dialog), "Warning");
res = gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
if(res != GTK_RESPONSE_CLOSE)
return;
}
tbuf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(editor->view));
gtk_text_buffer_set_text(tbuf, "", 0);
if(filename == NULL)
{
gtk_text_buffer_set_modified(GTK_TEXT_BUFFER(
gtk_text_view_get_buffer(GTK_TEXT_VIEW(
editor->view))), FALSE);
return;
}
if((fp = fopen(filename, "r")) == NULL)
{
snprintf(buf, sizeof(buf), "%s: %s", filename, strerror(errno));
editor_error(editor, buf, 1);
return;
}
tbuf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(editor->view));
gtk_text_buffer_set_text(tbuf, "", 0);
while((len = fread(buf, sizeof(char), sizeof(buf), fp)) > 0)
{
gtk_text_buffer_get_end_iter(tbuf, &iter);
#if 0
if((p = g_convert(buf, len, "UTF-8", "ISO-8859-15", &rlen, &wlen, NULL)) != NULL)
{
gtk_text_buffer_insert(tbuf, &iter, p, wlen);
g_free(p);
}
else
gtk_text_buffer_insert(tbuf, &iter, buf, len);
#else
if((p = g_locale_to_utf8(buf, len, &rlen, &wlen, &error))
!= NULL)
/* FIXME may lose characters */
gtk_text_buffer_insert(tbuf, &iter, p, wlen);
else
gtk_text_buffer_insert(tbuf, &iter, buf, len);
#endif
}
fclose(fp);
gtk_text_buffer_set_modified(GTK_TEXT_BUFFER(gtk_text_view_get_buffer(
GTK_TEXT_VIEW(editor->view))), FALSE);
editor->filename = g_strdup(filename);
_new_set_title(editor); /* XXX make it a generic private function */
}
/* editor_open_dialog */
void editor_open_dialog(Editor * editor)
{
GtkWidget * dialog;
char * filename = NULL;
dialog = gtk_file_chooser_dialog_new("Open file...",
GTK_WINDOW(editor->window),
GTK_FILE_CHOOSER_ACTION_OPEN,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT, NULL);
if(gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT)
filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(
dialog));
gtk_widget_destroy(dialog);
if(filename == NULL)
return;
editor_open(editor, filename);
g_free(filename);
}
/* editor_save */
gboolean editor_save(Editor * editor)
{
FILE * fp;
GtkTextBuffer * tbuf;
GtkTextIter start;
GtkTextIter end;
char * buf;
size_t len;
if(editor->filename == NULL)
{
editor_save_as_dialog(editor);
return FALSE;
}
if((fp = fopen(editor->filename, "w")) == NULL)
{
buf = g_strdup_printf("%s: %s", editor->filename, strerror(
errno));
editor_error(editor, buf, 1);
g_free(buf);
return FALSE;
}
tbuf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(editor->view));
/* FIXME allocating the complete file is not optimal */
gtk_text_buffer_get_start_iter(GTK_TEXT_BUFFER(tbuf), &start);
gtk_text_buffer_get_end_iter(GTK_TEXT_BUFFER(tbuf), &end);
buf = gtk_text_buffer_get_text(GTK_TEXT_BUFFER(tbuf), &start, &end,
FALSE);
len = strlen(buf);
if(fwrite(buf, sizeof(char), len, fp) != len)
{
g_free(buf);
fclose(fp);
editor_error(editor, "Partial write", 0);
return FALSE;
}
g_free(buf);
fclose(fp);
gtk_text_buffer_set_modified(GTK_TEXT_BUFFER(tbuf), FALSE);
return TRUE;
}
/* editor_save_as */
gboolean editor_save_as(Editor * editor, char const * filename)
{
struct stat st;
GtkWidget * dialog;
int ret;
if(stat(filename, &st) == 0)
{
dialog = gtk_message_dialog_new(GTK_WINDOW(editor->window),
GTK_DIALOG_MODAL
| GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_WARNING, GTK_BUTTONS_YES_NO, "%s",
"File exists. Overwrite?");
gtk_window_set_title(GTK_WINDOW(dialog), "Warning");
ret = gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
if(ret == GTK_RESPONSE_NO)
return FALSE;
}
g_free(editor->filename);
if((editor->filename = g_strdup(filename)) == NULL)
return editor_error(editor, "Allocation error", FALSE);
if(editor_save(editor) != TRUE)
return FALSE;
_new_set_title(editor);
return TRUE;
}
/* editor_save_as_dialog */
gboolean editor_save_as_dialog(Editor * editor)
{
GtkWidget * dialog;
char * filename = NULL;
gboolean ret;
dialog = gtk_file_chooser_dialog_new("Save as...",
GTK_WINDOW(editor->window),
GTK_FILE_CHOOSER_ACTION_SAVE,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT, NULL);
if(gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT)
filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(
dialog));
gtk_widget_destroy(dialog);
if(filename == NULL)
return FALSE;
ret = editor_save_as(editor, filename);
g_free(filename);
return ret;
}