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