src/image_viewer.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 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 #include "claws-features.h"
  23 #endif
  24
  25 #include <glib.h>
  26 #include <glib/gi18n.h>
  27 #include <gtk/gtk.h>
  28
  29 #include "procmime.h"
  30 #include "file-utils.h"
  31 #include "utils.h"
  32 #include "mimeview.h"
  33
  34 #include "prefs_common.h"
  35
  36 typedef struct _ImageViewer ImageViewer;
  37
  38 MimeViewerFactory image_viewer_factory;
  39 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
  40                                           gint * sw, gint * sh);
  41 static void image_viewer_clear_viewer(MimeViewer *imageviewer);
  42 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
  43                                   ImageViewer *imageviewer);
  44 struct _ImageViewer
  45 {
  46         MimeViewer mimeviewer;
  47
  48         gchar     *file;
  49         MimeInfo  *mimeinfo;
  50         gboolean   resize_img;
  51
  52         GtkWidget *scrolledwin;
  53         GtkWidget *image;
  54         GtkWidget *notebook;
  55         GtkWidget *filename;
  56         GtkWidget *filesize;
  57         GtkWidget *error_lbl;
  58         GtkWidget *error_msg;
  59         GtkWidget *content_type;
  60         GtkWidget *load_button;
  61 };
  62
  63 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
  64 {
  65         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
  66
  67         debug_print("image_viewer_get_widget\n");
  68
  69         return imageviewer->notebook;
  70 }
  71
  72 static void image_viewer_load_image(ImageViewer *imageviewer)
  73 {
  74         GtkAllocation allocation;
  75         GdkPixbufAnimation *animation = NULL;
  76         GdkPixbuf *pixbuf = NULL;
  77         GError *error = NULL;
  78         GInputStream *stream;
  79
  80         cm_return_if_fail(imageviewer != NULL);
  81
  82         if (imageviewer->mimeinfo == NULL)
  83                 return;
  84
  85         stream = procmime_get_part_as_inputstream(imageviewer->mimeinfo);
  86         if (stream == NULL) {
  87                 g_warning("Couldn't get image MIME part");
  88                 return;
  89         }
  90
  91 #if GDK_PIXBUF_MINOR >= 28
  92         animation = gdk_pixbuf_animation_new_from_stream(stream, NULL, &error);
  93 #else
  94         pixbuf = gdk_pixbuf_new_from_stream(stream, NULL, &error);
  95 #endif
  96         g_object_unref(stream);
  97
  98         if (error != NULL) {
  99                 g_warning("Couldn't load image: %s\n", error->message);
 100                 g_error_free(error);
 101                 return;
 102         }
 103
 104 #if GDK_PIXBUF_MINOR >= 28
 105         if (gdk_pixbuf_animation_is_static_image(animation)
 106             || imageviewer->resize_img) {
 107                 pixbuf = gdk_pixbuf_animation_get_static_image(animation);
 108                 g_object_ref(pixbuf);
 109                 g_object_unref(animation);
 110                 animation = NULL;
 111 #else
 112         if (imageviewer->resize_img) {
 113 #endif
 114
 115                 if (imageviewer->resize_img) {
 116                         gtk_widget_get_allocation(
 117                                 gtk_widget_get_parent(imageviewer->notebook), &allocation);
 118                         pixbuf = claws_load_pixbuf_fitting(pixbuf,
 119                                 allocation.width,
 120                                 allocation.height);
 121                 }
 122                 else
 123                         pixbuf = claws_load_pixbuf_fitting(pixbuf, -1, -1);
 124         }
 125
 126         if (error && !pixbuf && !animation) {
 127                 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
 128                 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
 129                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 130                 gtk_widget_hide(imageviewer->load_button);
 131                 g_error_free(error);
 132         }
 133         if (!pixbuf && !animation) {
 134                 g_warning("Can't load the image.");
 135                 return;
 136         }
 137
 138         if (animation)
 139                 gtk_image_set_from_animation(GTK_IMAGE(imageviewer->image), animation);
 140         else
 141                 gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
 142
 143         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
 144                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 145
 146
 147         gtk_widget_show(imageviewer->image);
 148         GTK_EVENTS_FLUSH();
 149         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
 150                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 151
 152         if (pixbuf)
 153                 g_object_unref(pixbuf);
 154         if (animation)
 155                 g_object_unref(animation);
 156 }
 157
 158 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 159 {
 160         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 161
 162         if (!prefs_common.display_img)
 163                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 164         else
 165                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 166 }
 167
 168 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 169 {
 170         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 171
 172         debug_print("image_viewer_show_mimepart\n");
 173
 174         image_viewer_clear_viewer(_mimeviewer);
 175         g_free(imageviewer->file);
 176         imageviewer->file = g_strdup(file);
 177         imageviewer->mimeinfo = mimeinfo;
 178
 179         gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 180                            procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 181         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
 182         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 183         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
 184         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
 185
 186         if (prefs_common.display_img)
 187                 image_viewer_load_image(imageviewer);
 188 }
 189
 190 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 191 {
 192         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 193         GtkAdjustment *hadj, *vadj;
 194
 195         debug_print("image_viewer_clear_viewer\n");
 196
 197         image_viewer_set_notebook_page(_mimeviewer);
 198
 199         if (imageviewer->scrolledwin) {
 200                 hadj = gtk_scrolled_window_get_hadjustment
 201                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 202                 if (hadj) {
 203                         gtk_adjustment_set_value(hadj, 0.0);
 204                         gtk_adjustment_changed(hadj);
 205                 }
 206                 vadj = gtk_scrolled_window_get_vadjustment
 207                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 208                 if (vadj) {
 209                         gtk_adjustment_set_value(vadj, 0.0);
 210                         gtk_adjustment_changed(vadj);
 211                 }
 212         }
 213         g_free(imageviewer->file);
 214         imageviewer->file = NULL;
 215         imageviewer->mimeinfo = NULL;
 216         imageviewer->resize_img = prefs_common.resize_img;
 217 }
 218
 219 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 220 {
 221         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 222
 223         debug_print("image_viewer_destroy_viewer\n");
 224
 225         image_viewer_clear_viewer(_mimeviewer);
 226         g_object_unref(imageviewer->notebook);
 227         g_free(imageviewer);
 228 }
 229
 230 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 231                              gint *sw, gint *sh)
 232 {
 233         gfloat wratio = 1.0;
 234         gfloat hratio = 1.0;
 235         gfloat ratio  = 1.0;
 236
 237         if (w > aw)
 238                 wratio = (gfloat)aw / (gfloat)w;
 239         if (h > ah)
 240                 hratio = (gfloat)ah / (gfloat)h;
 241
 242         ratio = (wratio > hratio) ? hratio : wratio;
 243
 244         *sw = (gint)(w * ratio);
 245         *sh = (gint)(h * ratio);
 246
 247         /* be paranoid */
 248         if (*sw <= 0 || *sh <= 0) {
 249                 *sw = w;
 250                 *sh = h;
 251         }
 252 }
 253
 254 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 255 {
 256         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 257         image_viewer_load_image(imageviewer);
 258 }
 259
 260 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 261                                       ImageViewer *imageviewer)
 262 {
 263         if (event->button == 1 && imageviewer->image) {
 264                 imageviewer->resize_img = !imageviewer->resize_img;
 265                 image_viewer_load_image(imageviewer);
 266                 return TRUE;
 267         }
 268         return FALSE;
 269 }
 270
 271 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 272                                   ImageViewer *imageviewer)
 273 {
 274         if (imageviewer->resize_img)
 275                 image_viewer_load_image(imageviewer);
 276 }
 277
 278 static MimeViewer *image_viewer_create(void)
 279 {
 280         ImageViewer *imageviewer;
 281         /*
 282          *  glade generated code (do not touch)
 283          */
 284         GtkWidget *notebook;
 285         GtkWidget *table1;
 286         GtkWidget *label3;
 287         GtkWidget *label4;
 288         GtkWidget *filename;
 289         GtkWidget *filesize;
 290         GtkWidget *load_button;
 291         GtkWidget *label5;
 292         GtkWidget *content_type;
 293         GtkWidget *scrolledwin;
 294         GtkWidget *error_lbl;
 295         GtkWidget *error_msg;
 296
 297         notebook = gtk_notebook_new();
 298         gtk_widget_show(notebook);
 299         gtk_widget_set_can_focus(notebook, FALSE);
 300         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 301         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 302
 303         table1 = gtk_table_new(5, 3, FALSE);
 304         gtk_widget_show(table1);
 305         gtk_container_add(GTK_CONTAINER(notebook), table1);
 306         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 307         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 308         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 309
 310         label3 = gtk_label_new(_("Filename:"));
 311         gtk_widget_show(label3);
 312         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 313                          (GtkAttachOptions) (GTK_FILL),
 314                          (GtkAttachOptions) (0), 0, 0);
 315         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 316
 317         label4 = gtk_label_new(_("Filesize:"));
 318         gtk_widget_show(label4);
 319         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 320                          (GtkAttachOptions) (GTK_FILL),
 321                          (GtkAttachOptions) (0), 0, 0);
 322         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 323
 324         filename = gtk_label_new("");
 325         gtk_widget_show(filename);
 326         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 327                          (GtkAttachOptions) (GTK_FILL),
 328                          (GtkAttachOptions) (0), 0, 0);
 329         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 330
 331         filesize = gtk_label_new("");
 332         gtk_widget_show(filesize);
 333         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 334                          (GtkAttachOptions) (GTK_FILL),
 335                          (GtkAttachOptions) (0), 0, 0);
 336         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 337
 338         label5 = gtk_label_new(_("Content-Type:"));
 339         gtk_widget_show(label5);
 340         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 341                          (GtkAttachOptions) (GTK_FILL),
 342                          (GtkAttachOptions) (0), 0, 0);
 343         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 344
 345         content_type = gtk_label_new("");
 346         gtk_widget_show(content_type);
 347         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 348                          (GtkAttachOptions) (GTK_FILL),
 349                          (GtkAttachOptions) (0), 0, 0);
 350         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 351
 352         error_lbl = gtk_label_new("");
 353         gtk_widget_show(error_lbl);
 354         gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
 355                          (GtkAttachOptions) (GTK_FILL),
 356                          (GtkAttachOptions) (0), 0, 0);
 357         gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
 358
 359         error_msg = gtk_label_new("");
 360         gtk_widget_show(error_msg);
 361         gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
 362                          (GtkAttachOptions) (GTK_FILL),
 363                          (GtkAttachOptions) (0), 0, 0);
 364         gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
 365
 366         load_button = gtk_button_new_with_label(_("Load Image"));
 367         gtk_widget_show(load_button);
 368         gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
 369                          (GtkAttachOptions) (GTK_FILL),
 370                          (GtkAttachOptions) (0), 0, 0);
 371
 372         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 373         gtk_widget_show(scrolledwin);
 374         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 375         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 376                                        GTK_POLICY_AUTOMATIC,
 377                                        GTK_POLICY_AUTOMATIC);
 378         /*
 379          *  end of glade code
 380          */
 381
 382         debug_print("Creating image view...\n");
 383         imageviewer = g_new0(ImageViewer, 1);
 384         imageviewer->mimeviewer.factory = &image_viewer_factory;
 385
 386         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 387         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 388         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 389         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 390         imageviewer->mimeviewer.get_selection = NULL;
 391
 392         imageviewer->resize_img   = prefs_common.resize_img;
 393
 394         imageviewer->scrolledwin  = scrolledwin;
 395         imageviewer->image = gtk_image_new();
 396         gtk_scrolled_window_add_with_viewport
 397                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 398                  imageviewer->image);
 399         imageviewer->notebook     = notebook;
 400         imageviewer->filename     = filename;
 401         imageviewer->filesize     = filesize;
 402         imageviewer->content_type = content_type;
 403         imageviewer->error_msg    = error_msg;
 404         imageviewer->error_lbl    = error_lbl;
 405         imageviewer->load_button = load_button;
 406
 407         g_object_ref(notebook);
 408
 409         g_signal_connect(G_OBJECT(load_button), "clicked",
 410                          G_CALLBACK(load_cb), imageviewer);
 411         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 412                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 413         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 414                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 415
 416         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 417
 418         return (MimeViewer *) imageviewer;
 419 }
 420
 421 static gchar *content_types[] =
 422         {"image/*", NULL};
 423
 424 MimeViewerFactory image_viewer_factory =
 425 {
 426         content_types,
 427         0,
 428
 429         image_viewer_create,
 430 };
 431
 432 void image_viewer_init(void)
 433 {
 434         mimeview_register_viewer_factory(&image_viewer_factory);
 435 }
 436
 437 void image_viewer_done(void)
 438 {
 439         mimeview_unregister_viewer_factory(&image_viewer_factory);
 440 }