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 "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 *error_lbl;
  57         GtkWidget *error_msg;
  58         GtkWidget *content_type;
  59         GtkWidget *load_button;
  60 };
  61
  62 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
  63 {
  64         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
  65
  66         debug_print("image_viewer_get_widget\n");
  67
  68         return imageviewer->notebook;
  69 }
  70
  71 static void image_viewer_load_file(ImageViewer *imageviewer, const gchar *imgfile)
  72 {
  73         GtkAllocation allocation;
  74         GdkPixbufAnimation *animation = NULL;
  75         GdkPixbuf *pixbuf = NULL;
  76         GError *error = NULL;
  77
  78         debug_print("image_viewer_show_mimepart\n");
  79
  80         animation = gdk_pixbuf_animation_new_from_file(imgfile, &error);
  81         if (gdk_pixbuf_animation_is_static_image(animation)
  82             || imageviewer->resize_img) {
  83                 pixbuf = gdk_pixbuf_animation_get_static_image(animation);
  84                 g_object_ref(pixbuf);
  85                 g_object_unref(animation);
  86                 animation = NULL;
  87
  88                 if (imageviewer->resize_img) {
  89                         gtk_widget_get_allocation(
  90                                 gtk_widget_get_parent(imageviewer->notebook), &allocation);
  91                         pixbuf = claws_load_pixbuf_fitting(pixbuf,
  92                                 allocation.width,
  93                                 allocation.height);
  94                 }
  95                 else
  96                         pixbuf = claws_load_pixbuf_fitting(pixbuf, -1, -1);
  97         }
  98
  99         if (error && !pixbuf && !animation) {
 100                 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
 101                 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
 102                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 103                 gtk_widget_hide(imageviewer->load_button);
 104                 g_error_free(error);
 105         }
 106         if (!pixbuf && !animation) {
 107                 g_warning("Can't load the image.");
 108                 return;
 109         }
 110
 111         if (animation)
 112                 gtk_image_set_from_animation(GTK_IMAGE(imageviewer->image), animation);
 113         else
 114                 gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
 115
 116         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
 117                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 118
 119
 120         gtk_widget_show(imageviewer->image);
 121         GTK_EVENTS_FLUSH();
 122         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
 123                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 124
 125         if (pixbuf)
 126                 g_object_unref(pixbuf);
 127         if (animation)
 128                 g_object_unref(animation);
 129 }
 130
 131 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 132 {
 133         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 134
 135         if (!prefs_common.display_img)
 136                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 137         else
 138                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 139 }
 140
 141 static void image_viewer_load_image(ImageViewer *imageviewer)
 142 {
 143         gchar *imgfile;
 144
 145         if (imageviewer->mimeinfo == NULL)
 146                 return;
 147
 148         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 149         if (procmime_get_part(imgfile, imageviewer->mimeinfo) < 0) {
 150                 g_warning("Can't get mimepart file");
 151                 g_free(imgfile);
 152                 return;
 153         }
 154         image_viewer_load_file(imageviewer, imgfile);
 155         claws_unlink(imgfile);
 156         g_free(imgfile);
 157 }
 158
 159 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 160 {
 161         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 162
 163         image_viewer_clear_viewer(_mimeviewer);
 164         g_free(imageviewer->file);
 165         imageviewer->file = g_strdup(file);
 166         imageviewer->mimeinfo = mimeinfo;
 167
 168         gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 169                            procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 170         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
 171         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 172         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
 173         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
 174
 175         if (prefs_common.display_img)
 176                 image_viewer_load_image(imageviewer);
 177 }
 178
 179 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 180 {
 181         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 182         GtkAdjustment *hadj, *vadj;
 183
 184         debug_print("image_viewer_clear_viewer\n");
 185
 186         image_viewer_set_notebook_page(_mimeviewer);
 187
 188         if (imageviewer->scrolledwin) {
 189                 hadj = gtk_scrolled_window_get_hadjustment
 190                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 191                 if (hadj) {
 192                         gtk_adjustment_set_value(hadj, 0.0);
 193                         gtk_adjustment_changed(hadj);
 194                 }
 195                 vadj = gtk_scrolled_window_get_vadjustment
 196                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 197                 if (vadj) {
 198                         gtk_adjustment_set_value(vadj, 0.0);
 199                         gtk_adjustment_changed(vadj);
 200                 }
 201         }
 202         g_free(imageviewer->file);
 203         imageviewer->file = NULL;
 204         imageviewer->mimeinfo = NULL;
 205         imageviewer->resize_img = prefs_common.resize_img;
 206 }
 207
 208 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 209 {
 210         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 211
 212         debug_print("image_viewer_destroy_viewer\n");
 213
 214         image_viewer_clear_viewer(_mimeviewer);
 215         g_object_unref(imageviewer->notebook);
 216         g_free(imageviewer);
 217 }
 218
 219 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 220                              gint *sw, gint *sh)
 221 {
 222         gfloat wratio = 1.0;
 223         gfloat hratio = 1.0;
 224         gfloat ratio  = 1.0;
 225
 226         if (w > aw)
 227                 wratio = (gfloat)aw / (gfloat)w;
 228         if (h > ah)
 229                 hratio = (gfloat)ah / (gfloat)h;
 230
 231         ratio = (wratio > hratio) ? hratio : wratio;
 232
 233         *sw = (gint)(w * ratio);
 234         *sh = (gint)(h * ratio);
 235
 236         /* be paranoid */
 237         if (*sw <= 0 || *sh <= 0) {
 238                 *sw = w;
 239                 *sh = h;
 240         }
 241 }
 242
 243 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 244 {
 245         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 246         image_viewer_load_image(imageviewer);
 247 }
 248
 249 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 250                                       ImageViewer *imageviewer)
 251 {
 252         if (event->button == 1 && imageviewer->image) {
 253                 imageviewer->resize_img = !imageviewer->resize_img;
 254                 image_viewer_load_image(imageviewer);
 255                 return TRUE;
 256         }
 257         return FALSE;
 258 }
 259
 260 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 261                                   ImageViewer *imageviewer)
 262 {
 263         if (imageviewer->resize_img)
 264                 image_viewer_load_image(imageviewer);
 265 }
 266
 267 static MimeViewer *image_viewer_create(void)
 268 {
 269         ImageViewer *imageviewer;
 270         /*
 271          *  glade generated code (do not touch)
 272          */
 273         GtkWidget *notebook;
 274         GtkWidget *table1;
 275         GtkWidget *label3;
 276         GtkWidget *label4;
 277         GtkWidget *filename;
 278         GtkWidget *filesize;
 279         GtkWidget *load_button;
 280         GtkWidget *label5;
 281         GtkWidget *content_type;
 282         GtkWidget *scrolledwin;
 283         GtkWidget *error_lbl;
 284         GtkWidget *error_msg;
 285
 286         notebook = gtk_notebook_new();
 287         gtk_widget_show(notebook);
 288         gtkut_widget_set_can_focus(notebook, FALSE);
 289         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 290         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 291
 292         table1 = gtk_table_new(5, 3, FALSE);
 293         gtk_widget_show(table1);
 294         gtk_container_add(GTK_CONTAINER(notebook), table1);
 295         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 296         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 297         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 298
 299         label3 = gtk_label_new(_("Filename:"));
 300         gtk_widget_show(label3);
 301         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 302                          (GtkAttachOptions) (GTK_FILL),
 303                          (GtkAttachOptions) (0), 0, 0);
 304         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 305
 306         label4 = gtk_label_new(_("Filesize:"));
 307         gtk_widget_show(label4);
 308         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 309                          (GtkAttachOptions) (GTK_FILL),
 310                          (GtkAttachOptions) (0), 0, 0);
 311         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 312
 313         filename = gtk_label_new("");
 314         gtk_widget_show(filename);
 315         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 316                          (GtkAttachOptions) (GTK_FILL),
 317                          (GtkAttachOptions) (0), 0, 0);
 318         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 319
 320         filesize = gtk_label_new("");
 321         gtk_widget_show(filesize);
 322         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 323                          (GtkAttachOptions) (GTK_FILL),
 324                          (GtkAttachOptions) (0), 0, 0);
 325         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 326
 327         label5 = gtk_label_new(_("Content-Type:"));
 328         gtk_widget_show(label5);
 329         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 330                          (GtkAttachOptions) (GTK_FILL),
 331                          (GtkAttachOptions) (0), 0, 0);
 332         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 333
 334         content_type = gtk_label_new("");
 335         gtk_widget_show(content_type);
 336         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 337                          (GtkAttachOptions) (GTK_FILL),
 338                          (GtkAttachOptions) (0), 0, 0);
 339         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 340
 341         error_lbl = gtk_label_new("");
 342         gtk_widget_show(error_lbl);
 343         gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
 344                          (GtkAttachOptions) (GTK_FILL),
 345                          (GtkAttachOptions) (0), 0, 0);
 346         gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
 347
 348         error_msg = gtk_label_new("");
 349         gtk_widget_show(error_msg);
 350         gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
 351                          (GtkAttachOptions) (GTK_FILL),
 352                          (GtkAttachOptions) (0), 0, 0);
 353         gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
 354
 355         load_button = gtk_button_new_with_label(_("Load Image"));
 356         gtk_widget_show(load_button);
 357         gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
 358                          (GtkAttachOptions) (GTK_FILL),
 359                          (GtkAttachOptions) (0), 0, 0);
 360
 361         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 362         gtk_widget_show(scrolledwin);
 363         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 364         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 365                                        GTK_POLICY_AUTOMATIC,
 366                                        GTK_POLICY_AUTOMATIC);
 367         /*
 368          *  end of glade code
 369          */
 370
 371         debug_print("Creating image view...\n");
 372         imageviewer = g_new0(ImageViewer, 1);
 373         imageviewer->mimeviewer.factory = &image_viewer_factory;
 374
 375         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 376         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 377         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 378         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 379         imageviewer->mimeviewer.get_selection = NULL;
 380
 381         imageviewer->resize_img   = prefs_common.resize_img;
 382
 383         imageviewer->scrolledwin  = scrolledwin;
 384         imageviewer->image = gtk_image_new();
 385         gtk_scrolled_window_add_with_viewport
 386                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 387                  imageviewer->image);
 388         imageviewer->notebook     = notebook;
 389         imageviewer->filename     = filename;
 390         imageviewer->filesize     = filesize;
 391         imageviewer->content_type = content_type;
 392         imageviewer->error_msg    = error_msg;
 393         imageviewer->error_lbl    = error_lbl;
 394         imageviewer->load_button = load_button;
 395
 396         g_object_ref(notebook);
 397
 398         g_signal_connect(G_OBJECT(load_button), "clicked",
 399                          G_CALLBACK(load_cb), imageviewer);
 400         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 401                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 402         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 403                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 404
 405         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 406
 407         return (MimeViewer *) imageviewer;
 408 }
 409
 410 static gchar *content_types[] =
 411         {"image/*", NULL};
 412
 413 MimeViewerFactory image_viewer_factory =
 414 {
 415         content_types,
 416         0,
 417
 418         image_viewer_create,
 419 };
 420
 421 void image_viewer_init(void)
 422 {
 423         mimeview_register_viewer_factory(&image_viewer_factory);
 424 }
 425
 426 void image_viewer_done(void)
 427 {
 428         mimeview_unregister_viewer_factory(&image_viewer_factory);
 429 }