src/image_viewer.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 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/gtkscrolledwindow.h>
  27 #include <gtk/gtkpixmap.h>
  28
  29 #include "procmime.h"
  30 #include "utils.h"
  31 #include "mimeview.h"
  32
  33 #include "prefs_common.h"
  34
  35 typedef struct _ImageViewer ImageViewer;
  36
  37 MimeViewerFactory image_viewer_factory;
  38 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
  39                                           gint * sw, gint * sh);
  40 static void image_viewer_clear_viewer(MimeViewer *imageviewer);
  41 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
  42                                   ImageViewer *imageviewer);
  43 struct _ImageViewer
  44 {
  45         MimeViewer mimeviewer;
  46
  47         gchar     *file;
  48         MimeInfo  *mimeinfo;
  49         gboolean   resize_img;
  50
  51         GtkWidget *scrolledwin;
  52         GtkWidget *image;
  53         GtkWidget *notebook;
  54         GtkWidget *filename;
  55         GtkWidget *filesize;
  56         GtkWidget *content_type;
  57 };
  58
  59 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
  60 {
  61         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
  62
  63         debug_print("image_viewer_get_widget\n");
  64
  65         return imageviewer->notebook;
  66 }
  67
  68 static void image_viewer_load_file(ImageViewer *imageviewer, const gchar *imgfile)
  69 {
  70         GdkPixbuf *pixbuf;
  71         gint avail_width;
  72         gint avail_height;
  73         GError *error = NULL;
  74
  75         debug_print("image_viewer_show_mimepart\n");
  76
  77         if (!imageviewer->resize_img) {
  78                 pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  79         } else {
  80                 gint w, h;
  81                 gdk_pixbuf_get_file_info(imgfile, &w, &h);
  82                 avail_width = imageviewer->notebook->parent->allocation.width;
  83                 avail_height = imageviewer->notebook->parent->allocation.height;
  84                 if (avail_width > 8) avail_width -= 8;
  85                 if (avail_height > 8) avail_height -= 8;
  86                 if (avail_width - 100 > 0 &&
  87                     (w > avail_width || h > avail_height))
  88                         pixbuf = gdk_pixbuf_new_from_file_at_scale(imgfile, avail_width,
  89                                 avail_height, TRUE, &error);
  90                 else
  91                         pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  92         }
  93
  94         if (error) {
  95                 g_warning(error->message);
  96                 g_error_free(error);
  97         }
  98         if (!pixbuf) {
  99                 g_warning("Can't load the image.");
 100                 return;
 101         }
 102
 103         if (!imageviewer->image) {
 104                 imageviewer->image = gtk_image_new();
 105
 106                 gtk_scrolled_window_add_with_viewport
 107                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 108                          imageviewer->image);
 109         }
 110
 111         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
 112                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 113
 114         gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
 115
 116         gtk_widget_show(imageviewer->image);
 117         GTK_EVENTS_FLUSH();
 118         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
 119                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 120
 121         g_object_unref(pixbuf);
 122 }
 123
 124 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 125 {
 126         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 127
 128         if (!prefs_common.display_img)
 129                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 130         else
 131                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 132 }
 133
 134 static void image_viewer_load_image(ImageViewer *imageviewer)
 135 {
 136         gchar *imgfile;
 137
 138         if (imageviewer->mimeinfo == NULL)
 139                 return;
 140
 141         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 142         if (procmime_get_part(imgfile, imageviewer->mimeinfo) < 0) {
 143                 g_warning("Can't get mimepart file");
 144                 g_free(imgfile);
 145                 return;
 146         }
 147         image_viewer_load_file(imageviewer, imgfile);
 148         g_unlink(imgfile);
 149         g_free(imgfile);
 150 }
 151
 152 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 153 {
 154         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 155
 156         image_viewer_clear_viewer(_mimeviewer);
 157         g_free(imageviewer->file);
 158         imageviewer->file = g_strdup(file);
 159         imageviewer->mimeinfo = mimeinfo;
 160
 161         if (prefs_common.display_img)
 162                 image_viewer_load_image(imageviewer);
 163         else {
 164                 gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 165                                    procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 166                 gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable(mimeinfo->length));
 167                 gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 168         }
 169 }
 170
 171 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 172 {
 173         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 174         GtkAdjustment *hadj, *vadj;
 175
 176         debug_print("image_viewer_clear_viewer\n");
 177
 178         image_viewer_set_notebook_page(_mimeviewer);
 179
 180         if (imageviewer->image != NULL) {
 181                 gtk_widget_destroy(imageviewer->image);
 182                 imageviewer->image = NULL;
 183         }
 184
 185         if (imageviewer->scrolledwin) {
 186                 hadj = gtk_scrolled_window_get_hadjustment
 187                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 188                 if (hadj)
 189                         gtk_adjustment_set_value(hadj, 0.0);
 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         }
 195         g_free(imageviewer->file);
 196         imageviewer->file = NULL;
 197         imageviewer->mimeinfo = NULL;
 198         imageviewer->resize_img = prefs_common.resize_img;
 199 }
 200
 201 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 202 {
 203         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 204
 205         debug_print("image_viewer_destroy_viewer\n");
 206
 207         image_viewer_clear_viewer(_mimeviewer);
 208         g_object_unref(imageviewer->notebook);
 209         g_free(imageviewer);
 210 }
 211
 212 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 213                              gint *sw, gint *sh)
 214 {
 215         gfloat wratio = 1.0;
 216         gfloat hratio = 1.0;
 217         gfloat ratio  = 1.0;
 218
 219         if (w > aw)
 220                 wratio = (gfloat)aw / (gfloat)w;
 221         if (h > ah)
 222                 hratio = (gfloat)ah / (gfloat)h;
 223
 224         ratio = (wratio > hratio) ? hratio : wratio;
 225
 226         *sw = (gint)(w * ratio);
 227         *sh = (gint)(h * ratio);
 228
 229         /* be paranoid */
 230         if (*sw <= 0 || *sh <= 0) {
 231                 *sw = w;
 232                 *sh = h;
 233         }
 234 }
 235
 236 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 237 {
 238         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 239         image_viewer_load_image(imageviewer);
 240 }
 241
 242 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 243                                       ImageViewer *imageviewer)
 244 {
 245         if (event->button == 1 && imageviewer->image) {
 246                 imageviewer->resize_img = !imageviewer->resize_img;
 247                 image_viewer_load_image(imageviewer);
 248                 return TRUE;
 249         }
 250         return FALSE;
 251 }
 252
 253 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 254                                   ImageViewer *imageviewer)
 255 {
 256         if (imageviewer->resize_img)
 257                 image_viewer_load_image(imageviewer);
 258 }
 259
 260 static MimeViewer *image_viewer_create(void)
 261 {
 262         ImageViewer *imageviewer;
 263         /*
 264          *  glade generated code (do not touch)
 265          */
 266         GtkWidget *notebook;
 267         GtkWidget *table1;
 268         GtkWidget *label3;
 269         GtkWidget *label4;
 270         GtkWidget *filename;
 271         GtkWidget *filesize;
 272         GtkWidget *load_button;
 273         GtkWidget *label5;
 274         GtkWidget *content_type;
 275         GtkWidget *scrolledwin;
 276
 277         notebook = gtk_notebook_new();
 278         gtk_widget_show(notebook);
 279         GTK_WIDGET_UNSET_FLAGS(notebook, GTK_CAN_FOCUS);
 280         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 281         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 282
 283         table1 = gtk_table_new(4, 3, FALSE);
 284         gtk_widget_show(table1);
 285         gtk_container_add(GTK_CONTAINER(notebook), table1);
 286         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 287         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 288         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 289
 290         label3 = gtk_label_new(_("Filename:"));
 291         gtk_widget_show(label3);
 292         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 293                          (GtkAttachOptions) (GTK_FILL),
 294                          (GtkAttachOptions) (0), 0, 0);
 295         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 296
 297         label4 = gtk_label_new(_("Filesize:"));
 298         gtk_widget_show(label4);
 299         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 300                          (GtkAttachOptions) (GTK_FILL),
 301                          (GtkAttachOptions) (0), 0, 0);
 302         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 303
 304         filename = gtk_label_new("");
 305         gtk_widget_show(filename);
 306         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 307                          (GtkAttachOptions) (GTK_FILL),
 308                          (GtkAttachOptions) (0), 0, 0);
 309         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 310
 311         filesize = gtk_label_new("");
 312         gtk_widget_show(filesize);
 313         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 314                          (GtkAttachOptions) (GTK_FILL),
 315                          (GtkAttachOptions) (0), 0, 0);
 316         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 317
 318         load_button = gtk_button_new_with_label(_("Load Image"));
 319         gtk_widget_show(load_button);
 320         gtk_table_attach(GTK_TABLE(table1), load_button, 1, 2, 3, 4,
 321                          (GtkAttachOptions) (GTK_FILL),
 322                          (GtkAttachOptions) (0), 0, 0);
 323
 324         label5 = gtk_label_new(_("Content-Type:"));
 325         gtk_widget_show(label5);
 326         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 327                          (GtkAttachOptions) (GTK_FILL),
 328                          (GtkAttachOptions) (0), 0, 0);
 329         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 330
 331         content_type = gtk_label_new("");
 332         gtk_widget_show(content_type);
 333         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 334                          (GtkAttachOptions) (GTK_FILL),
 335                          (GtkAttachOptions) (0), 0, 0);
 336         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 337
 338         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 339         gtk_widget_show(scrolledwin);
 340         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 341         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 342                                        GTK_POLICY_AUTOMATIC,
 343                                        GTK_POLICY_AUTOMATIC);
 344         /*
 345          *  end of glade code
 346          */
 347
 348         debug_print("Creating image view...\n");
 349         imageviewer = g_new0(ImageViewer, 1);
 350         imageviewer->mimeviewer.factory = &image_viewer_factory;
 351
 352         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 353         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 354         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 355         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 356         imageviewer->mimeviewer.get_selection = NULL;
 357
 358         imageviewer->resize_img   = prefs_common.resize_img;
 359
 360         imageviewer->scrolledwin  = scrolledwin;
 361         imageviewer->image        = NULL;
 362         imageviewer->notebook     = notebook;
 363         imageviewer->filename     = filename;
 364         imageviewer->filesize     = filesize;
 365         imageviewer->content_type = content_type;
 366
 367         gtk_widget_ref(notebook);
 368
 369         g_signal_connect(G_OBJECT(load_button), "clicked",
 370                          G_CALLBACK(load_cb), imageviewer);
 371         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 372                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 373         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 374                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 375
 376         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 377
 378         return (MimeViewer *) imageviewer;
 379 }
 380
 381 static gchar *content_types[] =
 382         {"image/*", NULL};
 383
 384 MimeViewerFactory image_viewer_factory =
 385 {
 386         content_types,
 387         0,
 388
 389         image_viewer_create,
 390 };
 391
 392 void image_viewer_init(void)
 393 {
 394         mimeview_register_viewer_factory(&image_viewer_factory);
 395 }
 396
 397 void image_viewer_done(void)
 398 {
 399         mimeview_unregister_viewer_factory(&image_viewer_factory);
 400 }