src/image_viewer.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include <glib.h>
  25 #include <glib/gi18n.h>
  26 #include <gtk/gtk.h>
  27
  28 #include "procmime.h"
  29 #include "utils.h"
  30 #include "mimeview.h"
  31
  32 #include "prefs_common.h"
  33
  34 typedef struct _ImageViewer ImageViewer;
  35
  36 MimeViewerFactory image_viewer_factory;
  37 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
  38                                           gint * sw, gint * sh);
  39 static void image_viewer_clear_viewer(MimeViewer *imageviewer);
  40 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
  41                                   ImageViewer *imageviewer);
  42 struct _ImageViewer
  43 {
  44         MimeViewer mimeviewer;
  45
  46         gchar     *file;
  47         MimeInfo  *mimeinfo;
  48         gboolean   resize_img;
  49
  50         GtkWidget *scrolledwin;
  51         GtkWidget *image;
  52         GtkWidget *notebook;
  53         GtkWidget *filename;
  54         GtkWidget *filesize;
  55         GtkWidget *error_lbl;
  56         GtkWidget *error_msg;
  57         GtkWidget *content_type;
  58         GtkWidget *load_button;
  59 };
  60
  61 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
  62 {
  63         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
  64
  65         debug_print("image_viewer_get_widget\n");
  66
  67         return imageviewer->notebook;
  68 }
  69
  70 static void image_viewer_load_file(ImageViewer *imageviewer, const gchar *imgfile)
  71 {
  72         GdkPixbuf *pixbuf;
  73         gint avail_width;
  74         gint avail_height;
  75         GError *error = NULL;
  76
  77         debug_print("image_viewer_show_mimepart\n");
  78
  79         if (!imageviewer->resize_img) {
  80                 pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  81         } else {
  82                 gint w, h;
  83                 gdk_pixbuf_get_file_info(imgfile, &w, &h);
  84                 avail_width = imageviewer->notebook->parent->allocation.width;
  85                 avail_height = imageviewer->notebook->parent->allocation.height;
  86                 if (avail_width > 8) avail_width -= 8;
  87                 if (avail_height > 8) avail_height -= 8;
  88                 if (avail_width - 100 > 0 &&
  89                     (w > avail_width || h > avail_height))
  90                         pixbuf = gdk_pixbuf_new_from_file_at_scale(imgfile, avail_width,
  91                                 avail_height, TRUE, &error);
  92                 else
  93                         pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  94         }
  95
  96         if (error) {
  97                 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
  98                 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
  99                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 100                 gtk_widget_hide(imageviewer->load_button);
 101                 g_error_free(error);
 102         }
 103         if (!pixbuf) {
 104                 g_warning("Can't load the image.");
 105                 return;
 106         }
 107
 108         if (!imageviewer->image && !imageviewer->resize_img) {
 109                 imageviewer->image = gtk_image_new();
 110
 111                 gtk_scrolled_window_add_with_viewport
 112                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 113                          imageviewer->image);
 114                 gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
 115         }
 116         else {
 117                 imageviewer->image = gtk_image_new_from_file(imgfile);
 118                 gtk_scrolled_window_add_with_viewport
 119                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 120                          imageviewer->image);
 121         }
 122
 123         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
 124                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 125
 126
 127         gtk_widget_show(imageviewer->image);
 128         GTK_EVENTS_FLUSH();
 129         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
 130                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 131
 132         g_object_unref(pixbuf);
 133 }
 134
 135 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 136 {
 137         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 138
 139         if (!prefs_common.display_img)
 140                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 141         else
 142                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 143 }
 144
 145 static void image_viewer_load_image(ImageViewer *imageviewer)
 146 {
 147         gchar *imgfile;
 148
 149         if (imageviewer->mimeinfo == NULL)
 150                 return;
 151
 152         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 153         if (procmime_get_part(imgfile, imageviewer->mimeinfo) < 0) {
 154                 g_warning("Can't get mimepart file");
 155                 g_free(imgfile);
 156                 return;
 157         }
 158         image_viewer_load_file(imageviewer, imgfile);
 159         claws_unlink(imgfile);
 160         g_free(imgfile);
 161 }
 162
 163 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 164 {
 165         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 166
 167         image_viewer_clear_viewer(_mimeviewer);
 168         g_free(imageviewer->file);
 169         imageviewer->file = g_strdup(file);
 170         imageviewer->mimeinfo = mimeinfo;
 171
 172         gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 173                            procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 174         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
 175         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 176         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
 177         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
 178
 179         if (prefs_common.display_img)
 180                 image_viewer_load_image(imageviewer);
 181 }
 182
 183 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 184 {
 185         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 186         GtkAdjustment *hadj, *vadj;
 187
 188         debug_print("image_viewer_clear_viewer\n");
 189
 190         image_viewer_set_notebook_page(_mimeviewer);
 191
 192         if (imageviewer->image != NULL) {
 193                 gtk_widget_destroy(imageviewer->image);
 194                 imageviewer->image = NULL;
 195         }
 196
 197         if (imageviewer->scrolledwin) {
 198                 hadj = gtk_scrolled_window_get_hadjustment
 199                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 200                 if (hadj) {
 201                         gtk_adjustment_set_value(hadj, 0.0);
 202                         gtk_adjustment_changed(hadj);
 203                 }
 204                 vadj = gtk_scrolled_window_get_vadjustment
 205                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 206                 if (vadj) {
 207                         gtk_adjustment_set_value(vadj, 0.0);
 208                         gtk_adjustment_changed(vadj);
 209                 }
 210         }
 211         g_free(imageviewer->file);
 212         imageviewer->file = NULL;
 213         imageviewer->mimeinfo = NULL;
 214         imageviewer->resize_img = prefs_common.resize_img;
 215 }
 216
 217 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 218 {
 219         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 220
 221         debug_print("image_viewer_destroy_viewer\n");
 222
 223         image_viewer_clear_viewer(_mimeviewer);
 224         g_object_unref(imageviewer->notebook);
 225         g_free(imageviewer);
 226 }
 227
 228 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 229                              gint *sw, gint *sh)
 230 {
 231         gfloat wratio = 1.0;
 232         gfloat hratio = 1.0;
 233         gfloat ratio  = 1.0;
 234
 235         if (w > aw)
 236                 wratio = (gfloat)aw / (gfloat)w;
 237         if (h > ah)
 238                 hratio = (gfloat)ah / (gfloat)h;
 239
 240         ratio = (wratio > hratio) ? hratio : wratio;
 241
 242         *sw = (gint)(w * ratio);
 243         *sh = (gint)(h * ratio);
 244
 245         /* be paranoid */
 246         if (*sw <= 0 || *sh <= 0) {
 247                 *sw = w;
 248                 *sh = h;
 249         }
 250 }
 251
 252 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 253 {
 254         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 255         image_viewer_load_image(imageviewer);
 256 }
 257
 258 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 259                                       ImageViewer *imageviewer)
 260 {
 261         if (event->button == 1 && imageviewer->image) {
 262                 imageviewer->resize_img = !imageviewer->resize_img;
 263                 image_viewer_load_image(imageviewer);
 264                 return TRUE;
 265         }
 266         return FALSE;
 267 }
 268
 269 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 270                                   ImageViewer *imageviewer)
 271 {
 272         if (imageviewer->resize_img)
 273                 image_viewer_load_image(imageviewer);
 274 }
 275
 276 static MimeViewer *image_viewer_create(void)
 277 {
 278         ImageViewer *imageviewer;
 279         /*
 280          *  glade generated code (do not touch)
 281          */
 282         GtkWidget *notebook;
 283         GtkWidget *table1;
 284         GtkWidget *label3;
 285         GtkWidget *label4;
 286         GtkWidget *filename;
 287         GtkWidget *filesize;
 288         GtkWidget *load_button;
 289         GtkWidget *label5;
 290         GtkWidget *content_type;
 291         GtkWidget *scrolledwin;
 292         GtkWidget *error_lbl;
 293         GtkWidget *error_msg;
 294
 295         notebook = gtk_notebook_new();
 296         gtk_widget_show(notebook);
 297         GTK_WIDGET_UNSET_FLAGS(notebook, GTK_CAN_FOCUS);
 298         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 299         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 300
 301         table1 = gtk_table_new(5, 3, FALSE);
 302         gtk_widget_show(table1);
 303         gtk_container_add(GTK_CONTAINER(notebook), table1);
 304         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 305         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 306         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 307
 308         label3 = gtk_label_new(_("Filename:"));
 309         gtk_widget_show(label3);
 310         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 311                          (GtkAttachOptions) (GTK_FILL),
 312                          (GtkAttachOptions) (0), 0, 0);
 313         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 314
 315         label4 = gtk_label_new(_("Filesize:"));
 316         gtk_widget_show(label4);
 317         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 318                          (GtkAttachOptions) (GTK_FILL),
 319                          (GtkAttachOptions) (0), 0, 0);
 320         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 321
 322         filename = gtk_label_new("");
 323         gtk_widget_show(filename);
 324         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 325                          (GtkAttachOptions) (GTK_FILL),
 326                          (GtkAttachOptions) (0), 0, 0);
 327         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 328
 329         filesize = gtk_label_new("");
 330         gtk_widget_show(filesize);
 331         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 332                          (GtkAttachOptions) (GTK_FILL),
 333                          (GtkAttachOptions) (0), 0, 0);
 334         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 335
 336         label5 = gtk_label_new(_("Content-Type:"));
 337         gtk_widget_show(label5);
 338         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 339                          (GtkAttachOptions) (GTK_FILL),
 340                          (GtkAttachOptions) (0), 0, 0);
 341         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 342
 343         content_type = gtk_label_new("");
 344         gtk_widget_show(content_type);
 345         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 346                          (GtkAttachOptions) (GTK_FILL),
 347                          (GtkAttachOptions) (0), 0, 0);
 348         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 349
 350         error_lbl = gtk_label_new("");
 351         gtk_widget_show(error_lbl);
 352         gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
 353                          (GtkAttachOptions) (GTK_FILL),
 354                          (GtkAttachOptions) (0), 0, 0);
 355         gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
 356
 357         error_msg = gtk_label_new("");
 358         gtk_widget_show(error_msg);
 359         gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
 360                          (GtkAttachOptions) (GTK_FILL),
 361                          (GtkAttachOptions) (0), 0, 0);
 362         gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
 363
 364         load_button = gtk_button_new_with_label(_("Load Image"));
 365         gtk_widget_show(load_button);
 366         gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
 367                          (GtkAttachOptions) (GTK_FILL),
 368                          (GtkAttachOptions) (0), 0, 0);
 369
 370         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 371         gtk_widget_show(scrolledwin);
 372         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 373         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 374                                        GTK_POLICY_AUTOMATIC,
 375                                        GTK_POLICY_AUTOMATIC);
 376         /*
 377          *  end of glade code
 378          */
 379
 380         debug_print("Creating image view...\n");
 381         imageviewer = g_new0(ImageViewer, 1);
 382         imageviewer->mimeviewer.factory = &image_viewer_factory;
 383
 384         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 385         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 386         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 387         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 388         imageviewer->mimeviewer.get_selection = NULL;
 389
 390         imageviewer->resize_img   = prefs_common.resize_img;
 391
 392         imageviewer->scrolledwin  = scrolledwin;
 393         imageviewer->image        = NULL;
 394         imageviewer->notebook     = notebook;
 395         imageviewer->filename     = filename;
 396         imageviewer->filesize     = filesize;
 397         imageviewer->content_type = content_type;
 398         imageviewer->error_msg    = error_msg;
 399         imageviewer->error_lbl    = error_lbl;
 400         imageviewer->load_button = load_button;
 401
 402         g_object_ref(notebook);
 403
 404         g_signal_connect(G_OBJECT(load_button), "clicked",
 405                          G_CALLBACK(load_cb), imageviewer);
 406         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 407                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 408         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 409                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 410
 411         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 412
 413         return (MimeViewer *) imageviewer;
 414 }
 415
 416 static gchar *content_types[] =
 417         {"image/*", NULL};
 418
 419 MimeViewerFactory image_viewer_factory =
 420 {
 421         content_types,
 422         0,
 423
 424         image_viewer_create,
 425 };
 426
 427 void image_viewer_init(void)
 428 {
 429         mimeview_register_viewer_factory(&image_viewer_factory);
 430 }
 431
 432 void image_viewer_done(void)
 433 {
 434         mimeview_unregister_viewer_factory(&image_viewer_factory);
 435 }