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