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") != NULL)?
 181                            procmime_mimeinfo_get_parameter(mimeinfo, "name") :
 182                            procmime_mimeinfo_get_parameter(mimeinfo, "filename"));
 183         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
 184         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 185         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
 186         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
 187
 188         if (prefs_common.display_img)
 189                 image_viewer_load_image(imageviewer);
 190 }
 191
 192 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 193 {
 194         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 195         GtkAdjustment *hadj, *vadj;
 196
 197         debug_print("image_viewer_clear_viewer\n");
 198
 199         image_viewer_set_notebook_page(_mimeviewer);
 200
 201         if (imageviewer->scrolledwin) {
 202                 hadj = gtk_scrolled_window_get_hadjustment
 203                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 204                 if (hadj) {
 205                         gtk_adjustment_set_value(hadj, 0.0);
 206                         gtk_adjustment_changed(hadj);
 207                 }
 208                 vadj = gtk_scrolled_window_get_vadjustment
 209                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 210                 if (vadj) {
 211                         gtk_adjustment_set_value(vadj, 0.0);
 212                         gtk_adjustment_changed(vadj);
 213                 }
 214         }
 215         g_free(imageviewer->file);
 216         imageviewer->file = NULL;
 217         imageviewer->mimeinfo = NULL;
 218         imageviewer->resize_img = prefs_common.resize_img;
 219 }
 220
 221 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 222 {
 223         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 224
 225         debug_print("image_viewer_destroy_viewer\n");
 226
 227         image_viewer_clear_viewer(_mimeviewer);
 228         g_object_unref(imageviewer->notebook);
 229         g_free(imageviewer);
 230 }
 231
 232 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 233                              gint *sw, gint *sh)
 234 {
 235         gfloat wratio = 1.0;
 236         gfloat hratio = 1.0;
 237         gfloat ratio  = 1.0;
 238
 239         if (w > aw)
 240                 wratio = (gfloat)aw / (gfloat)w;
 241         if (h > ah)
 242                 hratio = (gfloat)ah / (gfloat)h;
 243
 244         ratio = (wratio > hratio) ? hratio : wratio;
 245
 246         *sw = (gint)(w * ratio);
 247         *sh = (gint)(h * ratio);
 248
 249         /* be paranoid */
 250         if (*sw <= 0 || *sh <= 0) {
 251                 *sw = w;
 252                 *sh = h;
 253         }
 254 }
 255
 256 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 257 {
 258         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 259         image_viewer_load_image(imageviewer);
 260 }
 261
 262 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 263                                       ImageViewer *imageviewer)
 264 {
 265         if (event->button == 1 && imageviewer->image) {
 266                 imageviewer->resize_img = !imageviewer->resize_img;
 267                 image_viewer_load_image(imageviewer);
 268                 return TRUE;
 269         }
 270         return FALSE;
 271 }
 272
 273 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 274                                   ImageViewer *imageviewer)
 275 {
 276         if (imageviewer->resize_img)
 277                 image_viewer_load_image(imageviewer);
 278 }
 279
 280 static MimeViewer *image_viewer_create(void)
 281 {
 282         ImageViewer *imageviewer;
 283         /*
 284          *  glade generated code (do not touch)
 285          */
 286         GtkWidget *notebook;
 287         GtkWidget *table1;
 288         GtkWidget *label3;
 289         GtkWidget *label4;
 290         GtkWidget *filename;
 291         GtkWidget *filesize;
 292         GtkWidget *load_button;
 293         GtkWidget *label5;
 294         GtkWidget *content_type;
 295         GtkWidget *scrolledwin;
 296         GtkWidget *error_lbl;
 297         GtkWidget *error_msg;
 298
 299         notebook = gtk_notebook_new();
 300         gtk_widget_show(notebook);
 301         gtk_widget_set_can_focus(notebook, FALSE);
 302         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 303         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 304
 305         table1 = gtk_table_new(5, 3, FALSE);
 306         gtk_widget_show(table1);
 307         gtk_container_add(GTK_CONTAINER(notebook), table1);
 308         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 309         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 310         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 311
 312         label3 = gtk_label_new(_("Filename:"));
 313         gtk_widget_show(label3);
 314         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 315                          (GtkAttachOptions) (GTK_FILL),
 316                          (GtkAttachOptions) (0), 0, 0);
 317         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 318
 319         label4 = gtk_label_new(_("Filesize:"));
 320         gtk_widget_show(label4);
 321         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 322                          (GtkAttachOptions) (GTK_FILL),
 323                          (GtkAttachOptions) (0), 0, 0);
 324         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 325
 326         filename = gtk_label_new("");
 327         gtk_widget_show(filename);
 328         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 329                          (GtkAttachOptions) (GTK_FILL),
 330                          (GtkAttachOptions) (0), 0, 0);
 331         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 332
 333         filesize = gtk_label_new("");
 334         gtk_widget_show(filesize);
 335         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 336                          (GtkAttachOptions) (GTK_FILL),
 337                          (GtkAttachOptions) (0), 0, 0);
 338         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 339
 340         label5 = gtk_label_new(_("Content-Type:"));
 341         gtk_widget_show(label5);
 342         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 343                          (GtkAttachOptions) (GTK_FILL),
 344                          (GtkAttachOptions) (0), 0, 0);
 345         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 346
 347         content_type = gtk_label_new("");
 348         gtk_widget_show(content_type);
 349         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 350                          (GtkAttachOptions) (GTK_FILL),
 351                          (GtkAttachOptions) (0), 0, 0);
 352         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 353
 354         error_lbl = gtk_label_new("");
 355         gtk_widget_show(error_lbl);
 356         gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
 357                          (GtkAttachOptions) (GTK_FILL),
 358                          (GtkAttachOptions) (0), 0, 0);
 359         gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
 360
 361         error_msg = gtk_label_new("");
 362         gtk_widget_show(error_msg);
 363         gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
 364                          (GtkAttachOptions) (GTK_FILL),
 365                          (GtkAttachOptions) (0), 0, 0);
 366         gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
 367
 368         load_button = gtk_button_new_with_label(_("Load Image"));
 369         gtk_widget_show(load_button);
 370         gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
 371                          (GtkAttachOptions) (GTK_FILL),
 372                          (GtkAttachOptions) (0), 0, 0);
 373
 374         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 375         gtk_widget_show(scrolledwin);
 376         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 377         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 378                                        GTK_POLICY_AUTOMATIC,
 379                                        GTK_POLICY_AUTOMATIC);
 380         /*
 381          *  end of glade code
 382          */
 383
 384         debug_print("Creating image view...\n");
 385         imageviewer = g_new0(ImageViewer, 1);
 386         imageviewer->mimeviewer.factory = &image_viewer_factory;
 387
 388         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 389         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 390         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 391         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 392         imageviewer->mimeviewer.get_selection = NULL;
 393
 394         imageviewer->resize_img   = prefs_common.resize_img;
 395
 396         imageviewer->scrolledwin  = scrolledwin;
 397         imageviewer->image = gtk_image_new();
 398         gtk_scrolled_window_add_with_viewport
 399                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 400                  imageviewer->image);
 401         imageviewer->notebook     = notebook;
 402         imageviewer->filename     = filename;
 403         imageviewer->filesize     = filesize;
 404         imageviewer->content_type = content_type;
 405         imageviewer->error_msg    = error_msg;
 406         imageviewer->error_lbl    = error_lbl;
 407         imageviewer->load_button = load_button;
 408
 409         g_object_ref(notebook);
 410
 411         g_signal_connect(G_OBJECT(load_button), "clicked",
 412                          G_CALLBACK(load_cb), imageviewer);
 413         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 414                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 415         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 416                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 417
 418         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 419
 420         return (MimeViewer *) imageviewer;
 421 }
 422
 423 static gchar *content_types[] =
 424         {"image/*", NULL};
 425
 426 MimeViewerFactory image_viewer_factory =
 427 {
 428         content_types,
 429         0,
 430
 431         image_viewer_create,
 432 };
 433
 434 void image_viewer_init(void)
 435 {
 436         mimeview_register_viewer_factory(&image_viewer_factory);
 437 }
 438
 439 void image_viewer_done(void)
 440 {
 441         mimeview_unregister_viewer_factory(&image_viewer_factory);
 442 }