src/image_viewer.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2011 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         GdkPixbufAnimation *animation = NULL;
  73         GdkPixbuf *pixbuf = NULL;
  74         GError *error = NULL;
  75
  76         debug_print("image_viewer_show_mimepart\n");
  77
  78         animation = gdk_pixbuf_animation_new_from_file(imgfile, &error);
  79         if (gdk_pixbuf_animation_is_static_image(animation)
  80             || imageviewer->resize_img) {
  81                 pixbuf = gdk_pixbuf_animation_get_static_image(animation);
  82                 g_object_ref(pixbuf);
  83                 g_object_unref(animation);
  84                 animation = NULL;
  85
  86                 if (imageviewer->resize_img)
  87                         pixbuf = claws_load_pixbuf_fitting(pixbuf,
  88                                 imageviewer->notebook->parent->allocation.width,
  89                                 imageviewer->notebook->parent->allocation.height);
  90                 else
  91                         pixbuf = claws_load_pixbuf_fitting(pixbuf, -1, -1);
  92         }
  93
  94         if (error && !pixbuf && !animation) {
  95                 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
  96                 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
  97                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
  98                 gtk_widget_hide(imageviewer->load_button);
  99                 g_error_free(error);
 100         }
 101         if (!pixbuf && !animation) {
 102                 g_warning("Can't load the image.");
 103                 return;
 104         }
 105
 106         if (animation)
 107                 gtk_image_set_from_animation(GTK_IMAGE(imageviewer->image), animation);
 108         else
 109                 gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
 110
 111         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
 112                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 113
 114
 115         gtk_widget_show(imageviewer->image);
 116         GTK_EVENTS_FLUSH();
 117         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
 118                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 119
 120         if (pixbuf)
 121                 g_object_unref(pixbuf);
 122         if (animation)
 123                 g_object_unref(animation);
 124 }
 125
 126 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 127 {
 128         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 129
 130         if (!prefs_common.display_img)
 131                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 132         else
 133                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 134 }
 135
 136 static void image_viewer_load_image(ImageViewer *imageviewer)
 137 {
 138         gchar *imgfile;
 139
 140         if (imageviewer->mimeinfo == NULL)
 141                 return;
 142
 143         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 144         if (procmime_get_part(imgfile, imageviewer->mimeinfo) < 0) {
 145                 g_warning("Can't get mimepart file");
 146                 g_free(imgfile);
 147                 return;
 148         }
 149         image_viewer_load_file(imageviewer, imgfile);
 150         claws_unlink(imgfile);
 151         g_free(imgfile);
 152 }
 153
 154 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 155 {
 156         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 157
 158         image_viewer_clear_viewer(_mimeviewer);
 159         g_free(imageviewer->file);
 160         imageviewer->file = g_strdup(file);
 161         imageviewer->mimeinfo = mimeinfo;
 162
 163         gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 164                            procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 165         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
 166         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 167         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
 168         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
 169
 170         if (prefs_common.display_img)
 171                 image_viewer_load_image(imageviewer);
 172 }
 173
 174 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 175 {
 176         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 177         GtkAdjustment *hadj, *vadj;
 178
 179         debug_print("image_viewer_clear_viewer\n");
 180
 181         image_viewer_set_notebook_page(_mimeviewer);
 182
 183         if (imageviewer->scrolledwin) {
 184                 hadj = gtk_scrolled_window_get_hadjustment
 185                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 186                 if (hadj) {
 187                         gtk_adjustment_set_value(hadj, 0.0);
 188                         gtk_adjustment_changed(hadj);
 189                 }
 190                 vadj = gtk_scrolled_window_get_vadjustment
 191                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 192                 if (vadj) {
 193                         gtk_adjustment_set_value(vadj, 0.0);
 194                         gtk_adjustment_changed(vadj);
 195                 }
 196         }
 197         g_free(imageviewer->file);
 198         imageviewer->file = NULL;
 199         imageviewer->mimeinfo = NULL;
 200         imageviewer->resize_img = prefs_common.resize_img;
 201 }
 202
 203 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 204 {
 205         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 206
 207         debug_print("image_viewer_destroy_viewer\n");
 208
 209         image_viewer_clear_viewer(_mimeviewer);
 210         g_object_unref(imageviewer->notebook);
 211         g_free(imageviewer);
 212 }
 213
 214 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 215                              gint *sw, gint *sh)
 216 {
 217         gfloat wratio = 1.0;
 218         gfloat hratio = 1.0;
 219         gfloat ratio  = 1.0;
 220
 221         if (w > aw)
 222                 wratio = (gfloat)aw / (gfloat)w;
 223         if (h > ah)
 224                 hratio = (gfloat)ah / (gfloat)h;
 225
 226         ratio = (wratio > hratio) ? hratio : wratio;
 227
 228         *sw = (gint)(w * ratio);
 229         *sh = (gint)(h * ratio);
 230
 231         /* be paranoid */
 232         if (*sw <= 0 || *sh <= 0) {
 233                 *sw = w;
 234                 *sh = h;
 235         }
 236 }
 237
 238 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 239 {
 240         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 241         image_viewer_load_image(imageviewer);
 242 }
 243
 244 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 245                                       ImageViewer *imageviewer)
 246 {
 247         if (event->button == 1 && imageviewer->image) {
 248                 imageviewer->resize_img = !imageviewer->resize_img;
 249                 image_viewer_load_image(imageviewer);
 250                 return TRUE;
 251         }
 252         return FALSE;
 253 }
 254
 255 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 256                                   ImageViewer *imageviewer)
 257 {
 258         if (imageviewer->resize_img)
 259                 image_viewer_load_image(imageviewer);
 260 }
 261
 262 static MimeViewer *image_viewer_create(void)
 263 {
 264         ImageViewer *imageviewer;
 265         /*
 266          *  glade generated code (do not touch)
 267          */
 268         GtkWidget *notebook;
 269         GtkWidget *table1;
 270         GtkWidget *label3;
 271         GtkWidget *label4;
 272         GtkWidget *filename;
 273         GtkWidget *filesize;
 274         GtkWidget *load_button;
 275         GtkWidget *label5;
 276         GtkWidget *content_type;
 277         GtkWidget *scrolledwin;
 278         GtkWidget *error_lbl;
 279         GtkWidget *error_msg;
 280
 281         notebook = gtk_notebook_new();
 282         gtk_widget_show(notebook);
 283         gtkut_widget_set_can_focus(notebook, FALSE);
 284         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 285         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 286
 287         table1 = gtk_table_new(5, 3, FALSE);
 288         gtk_widget_show(table1);
 289         gtk_container_add(GTK_CONTAINER(notebook), table1);
 290         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 291         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 292         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 293
 294         label3 = gtk_label_new(_("Filename:"));
 295         gtk_widget_show(label3);
 296         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 297                          (GtkAttachOptions) (GTK_FILL),
 298                          (GtkAttachOptions) (0), 0, 0);
 299         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 300
 301         label4 = gtk_label_new(_("Filesize:"));
 302         gtk_widget_show(label4);
 303         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 304                          (GtkAttachOptions) (GTK_FILL),
 305                          (GtkAttachOptions) (0), 0, 0);
 306         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 307
 308         filename = gtk_label_new("");
 309         gtk_widget_show(filename);
 310         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 311                          (GtkAttachOptions) (GTK_FILL),
 312                          (GtkAttachOptions) (0), 0, 0);
 313         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 314
 315         filesize = gtk_label_new("");
 316         gtk_widget_show(filesize);
 317         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 318                          (GtkAttachOptions) (GTK_FILL),
 319                          (GtkAttachOptions) (0), 0, 0);
 320         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 321
 322         label5 = gtk_label_new(_("Content-Type:"));
 323         gtk_widget_show(label5);
 324         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 325                          (GtkAttachOptions) (GTK_FILL),
 326                          (GtkAttachOptions) (0), 0, 0);
 327         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 328
 329         content_type = gtk_label_new("");
 330         gtk_widget_show(content_type);
 331         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 332                          (GtkAttachOptions) (GTK_FILL),
 333                          (GtkAttachOptions) (0), 0, 0);
 334         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 335
 336         error_lbl = gtk_label_new("");
 337         gtk_widget_show(error_lbl);
 338         gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
 339                          (GtkAttachOptions) (GTK_FILL),
 340                          (GtkAttachOptions) (0), 0, 0);
 341         gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
 342
 343         error_msg = gtk_label_new("");
 344         gtk_widget_show(error_msg);
 345         gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
 346                          (GtkAttachOptions) (GTK_FILL),
 347                          (GtkAttachOptions) (0), 0, 0);
 348         gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
 349
 350         load_button = gtk_button_new_with_label(_("Load Image"));
 351         gtk_widget_show(load_button);
 352         gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
 353                          (GtkAttachOptions) (GTK_FILL),
 354                          (GtkAttachOptions) (0), 0, 0);
 355
 356         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 357         gtk_widget_show(scrolledwin);
 358         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 359         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 360                                        GTK_POLICY_AUTOMATIC,
 361                                        GTK_POLICY_AUTOMATIC);
 362         /*
 363          *  end of glade code
 364          */
 365
 366         debug_print("Creating image view...\n");
 367         imageviewer = g_new0(ImageViewer, 1);
 368         imageviewer->mimeviewer.factory = &image_viewer_factory;
 369
 370         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 371         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 372         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 373         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 374         imageviewer->mimeviewer.get_selection = NULL;
 375
 376         imageviewer->resize_img   = prefs_common.resize_img;
 377
 378         imageviewer->scrolledwin  = scrolledwin;
 379         imageviewer->image = gtk_image_new();
 380         gtk_scrolled_window_add_with_viewport
 381                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 382                  imageviewer->image);
 383         imageviewer->notebook     = notebook;
 384         imageviewer->filename     = filename;
 385         imageviewer->filesize     = filesize;
 386         imageviewer->content_type = content_type;
 387         imageviewer->error_msg    = error_msg;
 388         imageviewer->error_lbl    = error_lbl;
 389         imageviewer->load_button = load_button;
 390
 391         g_object_ref(notebook);
 392
 393         g_signal_connect(G_OBJECT(load_button), "clicked",
 394                          G_CALLBACK(load_cb), imageviewer);
 395         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 396                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 397         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 398                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 399
 400         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 401
 402         return (MimeViewer *) imageviewer;
 403 }
 404
 405 static gchar *content_types[] =
 406         {"image/*", NULL};
 407
 408 MimeViewerFactory image_viewer_factory =
 409 {
 410         content_types,
 411         0,
 412
 413         image_viewer_create,
 414 };
 415
 416 void image_viewer_init(void)
 417 {
 418         mimeview_register_viewer_factory(&image_viewer_factory);
 419 }
 420
 421 void image_viewer_done(void)
 422 {
 423         mimeview_unregister_viewer_factory(&image_viewer_factory);
 424 }