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, &error);
  86         if (error != NULL) {
  87                 g_warning("Couldn't get image MIME part: %s\n", error->message);
  88                 g_error_free(error);
  89                 return;
  90         }
  91
  92 #if GDK_PIXBUF_MINOR >= 28
  93         animation = gdk_pixbuf_animation_new_from_stream(stream, NULL, &error);
  94 #else
  95         pixbuf = gdk_pixbuf_new_from_stream(stream, NULL, &error);
  96 #endif
  97         g_object_unref(stream);
  98
  99         if (error != NULL) {
 100                 g_warning("Couldn't load image: %s\n", error->message);
 101                 g_error_free(error);
 102                 return;
 103         }
 104
 105 #if GDK_PIXBUF_MINOR >= 28
 106         if (gdk_pixbuf_animation_is_static_image(animation)
 107             || imageviewer->resize_img) {
 108                 pixbuf = gdk_pixbuf_animation_get_static_image(animation);
 109                 g_object_ref(pixbuf);
 110                 g_object_unref(animation);
 111                 animation = NULL;
 112 #else
 113         if (imageviewer->resize_img) {
 114 #endif
 115
 116                 if (imageviewer->resize_img) {
 117                         gtk_widget_get_allocation(
 118                                 gtk_widget_get_parent(imageviewer->notebook), &allocation);
 119                         pixbuf = claws_load_pixbuf_fitting(pixbuf,
 120                                 allocation.width,
 121                                 allocation.height);
 122                 }
 123                 else
 124                         pixbuf = claws_load_pixbuf_fitting(pixbuf, -1, -1);
 125         }
 126
 127         if (error && !pixbuf && !animation) {
 128                 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
 129                 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
 130                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 131                 gtk_widget_hide(imageviewer->load_button);
 132                 g_error_free(error);
 133         }
 134         if (!pixbuf && !animation) {
 135                 g_warning("Can't load the image.");
 136                 return;
 137         }
 138
 139         if (animation)
 140                 gtk_image_set_from_animation(GTK_IMAGE(imageviewer->image), animation);
 141         else
 142                 gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
 143
 144         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
 145                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 146
 147
 148         gtk_widget_show(imageviewer->image);
 149         GTK_EVENTS_FLUSH();
 150         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
 151                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 152
 153         if (pixbuf)
 154                 g_object_unref(pixbuf);
 155         if (animation)
 156                 g_object_unref(animation);
 157 }
 158
 159 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 160 {
 161         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 162
 163         if (!prefs_common.display_img)
 164                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 165         else
 166                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 167 }
 168
 169 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 170 {
 171         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 172
 173         debug_print("image_viewer_show_mimepart\n");
 174
 175         image_viewer_clear_viewer(_mimeviewer);
 176         g_free(imageviewer->file);
 177         imageviewer->file = g_strdup(file);
 178         imageviewer->mimeinfo = mimeinfo;
 179
 180         gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 181                            procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 182         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
 183         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 184         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
 185         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
 186
 187         if (prefs_common.display_img)
 188                 image_viewer_load_image(imageviewer);
 189 }
 190
 191 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 192 {
 193         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 194         GtkAdjustment *hadj, *vadj;
 195
 196         debug_print("image_viewer_clear_viewer\n");
 197
 198         image_viewer_set_notebook_page(_mimeviewer);
 199
 200         if (imageviewer->scrolledwin) {
 201                 hadj = gtk_scrolled_window_get_hadjustment
 202                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 203                 if (hadj) {
 204                         gtk_adjustment_set_value(hadj, 0.0);
 205                         gtk_adjustment_changed(hadj);
 206                 }
 207                 vadj = gtk_scrolled_window_get_vadjustment
 208                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 209                 if (vadj) {
 210                         gtk_adjustment_set_value(vadj, 0.0);
 211                         gtk_adjustment_changed(vadj);
 212                 }
 213         }
 214         g_free(imageviewer->file);
 215         imageviewer->file = NULL;
 216         imageviewer->mimeinfo = NULL;
 217         imageviewer->resize_img = prefs_common.resize_img;
 218 }
 219
 220 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 221 {
 222         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 223
 224         debug_print("image_viewer_destroy_viewer\n");
 225
 226         image_viewer_clear_viewer(_mimeviewer);
 227         g_object_unref(imageviewer->notebook);
 228         g_free(imageviewer);
 229 }
 230
 231 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 232                              gint *sw, gint *sh)
 233 {
 234         gfloat wratio = 1.0;
 235         gfloat hratio = 1.0;
 236         gfloat ratio  = 1.0;
 237
 238         if (w > aw)
 239                 wratio = (gfloat)aw / (gfloat)w;
 240         if (h > ah)
 241                 hratio = (gfloat)ah / (gfloat)h;
 242
 243         ratio = (wratio > hratio) ? hratio : wratio;
 244
 245         *sw = (gint)(w * ratio);
 246         *sh = (gint)(h * ratio);
 247
 248         /* be paranoid */
 249         if (*sw <= 0 || *sh <= 0) {
 250                 *sw = w;
 251                 *sh = h;
 252         }
 253 }
 254
 255 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 256 {
 257         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 258         image_viewer_load_image(imageviewer);
 259 }
 260
 261 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 262                                       ImageViewer *imageviewer)
 263 {
 264         if (event->button == 1 && imageviewer->image) {
 265                 imageviewer->resize_img = !imageviewer->resize_img;
 266                 image_viewer_load_image(imageviewer);
 267                 return TRUE;
 268         }
 269         return FALSE;
 270 }
 271
 272 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 273                                   ImageViewer *imageviewer)
 274 {
 275         if (imageviewer->resize_img)
 276                 image_viewer_load_image(imageviewer);
 277 }
 278
 279 static MimeViewer *image_viewer_create(void)
 280 {
 281         ImageViewer *imageviewer;
 282         /*
 283          *  glade generated code (do not touch)
 284          */
 285         GtkWidget *notebook;
 286         GtkWidget *table1;
 287         GtkWidget *label3;
 288         GtkWidget *label4;
 289         GtkWidget *filename;
 290         GtkWidget *filesize;
 291         GtkWidget *load_button;
 292         GtkWidget *label5;
 293         GtkWidget *content_type;
 294         GtkWidget *scrolledwin;
 295         GtkWidget *error_lbl;
 296         GtkWidget *error_msg;
 297
 298         notebook = gtk_notebook_new();
 299         gtk_widget_show(notebook);
 300         gtk_widget_set_can_focus(notebook, FALSE);
 301         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 302         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 303
 304         table1 = gtk_table_new(5, 3, FALSE);
 305         gtk_widget_show(table1);
 306         gtk_container_add(GTK_CONTAINER(notebook), table1);
 307         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 308         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 309         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 310
 311         label3 = gtk_label_new(_("Filename:"));
 312         gtk_widget_show(label3);
 313         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 314                          (GtkAttachOptions) (GTK_FILL),
 315                          (GtkAttachOptions) (0), 0, 0);
 316         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 317
 318         label4 = gtk_label_new(_("Filesize:"));
 319         gtk_widget_show(label4);
 320         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 321                          (GtkAttachOptions) (GTK_FILL),
 322                          (GtkAttachOptions) (0), 0, 0);
 323         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 324
 325         filename = gtk_label_new("");
 326         gtk_widget_show(filename);
 327         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 328                          (GtkAttachOptions) (GTK_FILL),
 329                          (GtkAttachOptions) (0), 0, 0);
 330         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 331
 332         filesize = gtk_label_new("");
 333         gtk_widget_show(filesize);
 334         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 335                          (GtkAttachOptions) (GTK_FILL),
 336                          (GtkAttachOptions) (0), 0, 0);
 337         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 338
 339         label5 = gtk_label_new(_("Content-Type:"));
 340         gtk_widget_show(label5);
 341         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 342                          (GtkAttachOptions) (GTK_FILL),
 343                          (GtkAttachOptions) (0), 0, 0);
 344         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 345
 346         content_type = gtk_label_new("");
 347         gtk_widget_show(content_type);
 348         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 349                          (GtkAttachOptions) (GTK_FILL),
 350                          (GtkAttachOptions) (0), 0, 0);
 351         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 352
 353         error_lbl = gtk_label_new("");
 354         gtk_widget_show(error_lbl);
 355         gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
 356                          (GtkAttachOptions) (GTK_FILL),
 357                          (GtkAttachOptions) (0), 0, 0);
 358         gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
 359
 360         error_msg = gtk_label_new("");
 361         gtk_widget_show(error_msg);
 362         gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
 363                          (GtkAttachOptions) (GTK_FILL),
 364                          (GtkAttachOptions) (0), 0, 0);
 365         gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
 366
 367         load_button = gtk_button_new_with_label(_("Load Image"));
 368         gtk_widget_show(load_button);
 369         gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
 370                          (GtkAttachOptions) (GTK_FILL),
 371                          (GtkAttachOptions) (0), 0, 0);
 372
 373         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 374         gtk_widget_show(scrolledwin);
 375         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 376         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 377                                        GTK_POLICY_AUTOMATIC,
 378                                        GTK_POLICY_AUTOMATIC);
 379         /*
 380          *  end of glade code
 381          */
 382
 383         debug_print("Creating image view...\n");
 384         imageviewer = g_new0(ImageViewer, 1);
 385         imageviewer->mimeviewer.factory = &image_viewer_factory;
 386
 387         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 388         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 389         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 390         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 391         imageviewer->mimeviewer.get_selection = NULL;
 392
 393         imageviewer->resize_img   = prefs_common.resize_img;
 394
 395         imageviewer->scrolledwin  = scrolledwin;
 396         imageviewer->image = gtk_image_new();
 397         gtk_scrolled_window_add_with_viewport
 398                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 399                  imageviewer->image);
 400         imageviewer->notebook     = notebook;
 401         imageviewer->filename     = filename;
 402         imageviewer->filesize     = filesize;
 403         imageviewer->content_type = content_type;
 404         imageviewer->error_msg    = error_msg;
 405         imageviewer->error_lbl    = error_lbl;
 406         imageviewer->load_button = load_button;
 407
 408         g_object_ref(notebook);
 409
 410         g_signal_connect(G_OBJECT(load_button), "clicked",
 411                          G_CALLBACK(load_cb), imageviewer);
 412         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 413                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 414         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 415                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 416
 417         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 418
 419         return (MimeViewer *) imageviewer;
 420 }
 421
 422 static gchar *content_types[] =
 423         {"image/*", NULL};
 424
 425 MimeViewerFactory image_viewer_factory =
 426 {
 427         content_types,
 428         0,
 429
 430         image_viewer_create,
 431 };
 432
 433 void image_viewer_init(void)
 434 {
 435         mimeview_register_viewer_factory(&image_viewer_factory);
 436 }
 437
 438 void image_viewer_done(void)
 439 {
 440         mimeview_unregister_viewer_factory(&image_viewer_factory);
 441 }