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 *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         GdkPixbuf *pixbuf;
  74         gint avail_width;
  75         gint avail_height;
  76         GError *error = NULL;
  77
  78         debug_print("image_viewer_show_mimepart\n");
  79
  80         if (!imageviewer->resize_img) {
  81                 pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  82         } else {
  83                 gint w, h;
  84                 gdk_pixbuf_get_file_info(imgfile, &w, &h);
  85                 avail_width = imageviewer->notebook->parent->allocation.width;
  86                 avail_height = imageviewer->notebook->parent->allocation.height;
  87                 if (avail_width > 8) avail_width -= 8;
  88                 if (avail_height > 8) avail_height -= 8;
  89                 if (avail_width - 100 > 0 &&
  90                     (w > avail_width || h > avail_height))
  91                         pixbuf = gdk_pixbuf_new_from_file_at_scale(imgfile, avail_width,
  92                                 avail_height, TRUE, &error);
  93                 else
  94                         pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  95         }
  96
  97         if (error) {
  98                 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
  99                 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
 100                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 101                 gtk_widget_hide(imageviewer->load_button);
 102                 g_error_free(error);
 103         }
 104         if (!pixbuf) {
 105                 g_warning("Can't load the image.");
 106                 return;
 107         }
 108
 109         if (!imageviewer->image && !imageviewer->resize_img) {
 110                 imageviewer->image = gtk_image_new();
 111
 112                 gtk_scrolled_window_add_with_viewport
 113                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 114                          imageviewer->image);
 115                 gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
 116         }
 117         else {
 118                 imageviewer->image = gtk_image_new_from_file(imgfile);
 119                 gtk_scrolled_window_add_with_viewport
 120                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 121                          imageviewer->image);
 122         }
 123
 124         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
 125                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 126
 127
 128         gtk_widget_show(imageviewer->image);
 129         GTK_EVENTS_FLUSH();
 130         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
 131                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 132
 133         g_object_unref(pixbuf);
 134 }
 135
 136 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 137 {
 138         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 139
 140         if (!prefs_common.display_img)
 141                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 142         else
 143                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 144 }
 145
 146 static void image_viewer_load_image(ImageViewer *imageviewer)
 147 {
 148         gchar *imgfile;
 149
 150         if (imageviewer->mimeinfo == NULL)
 151                 return;
 152
 153         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 154         if (procmime_get_part(imgfile, imageviewer->mimeinfo) < 0) {
 155                 g_warning("Can't get mimepart file");
 156                 g_free(imgfile);
 157                 return;
 158         }
 159         image_viewer_load_file(imageviewer, imgfile);
 160         claws_unlink(imgfile);
 161         g_free(imgfile);
 162 }
 163
 164 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 165 {
 166         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 167
 168         image_viewer_clear_viewer(_mimeviewer);
 169         g_free(imageviewer->file);
 170         imageviewer->file = g_strdup(file);
 171         imageviewer->mimeinfo = mimeinfo;
 172
 173         gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 174                            procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 175         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
 176         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 177         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
 178         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
 179
 180         if (prefs_common.display_img)
 181                 image_viewer_load_image(imageviewer);
 182 }
 183
 184 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 185 {
 186         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 187         GtkAdjustment *hadj, *vadj;
 188
 189         debug_print("image_viewer_clear_viewer\n");
 190
 191         image_viewer_set_notebook_page(_mimeviewer);
 192
 193         if (imageviewer->image != NULL) {
 194                 gtk_widget_destroy(imageviewer->image);
 195                 imageviewer->image = NULL;
 196         }
 197
 198         if (imageviewer->scrolledwin) {
 199                 hadj = gtk_scrolled_window_get_hadjustment
 200                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 201                 if (hadj) {
 202                         gtk_adjustment_set_value(hadj, 0.0);
 203                         gtk_adjustment_changed(hadj);
 204                 }
 205                 vadj = gtk_scrolled_window_get_vadjustment
 206                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 207                 if (vadj) {
 208                         gtk_adjustment_set_value(vadj, 0.0);
 209                         gtk_adjustment_changed(vadj);
 210                 }
 211         }
 212         g_free(imageviewer->file);
 213         imageviewer->file = NULL;
 214         imageviewer->mimeinfo = NULL;
 215         imageviewer->resize_img = prefs_common.resize_img;
 216 }
 217
 218 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 219 {
 220         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 221
 222         debug_print("image_viewer_destroy_viewer\n");
 223
 224         image_viewer_clear_viewer(_mimeviewer);
 225         g_object_unref(imageviewer->notebook);
 226         g_free(imageviewer);
 227 }
 228
 229 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 230                              gint *sw, gint *sh)
 231 {
 232         gfloat wratio = 1.0;
 233         gfloat hratio = 1.0;
 234         gfloat ratio  = 1.0;
 235
 236         if (w > aw)
 237                 wratio = (gfloat)aw / (gfloat)w;
 238         if (h > ah)
 239                 hratio = (gfloat)ah / (gfloat)h;
 240
 241         ratio = (wratio > hratio) ? hratio : wratio;
 242
 243         *sw = (gint)(w * ratio);
 244         *sh = (gint)(h * ratio);
 245
 246         /* be paranoid */
 247         if (*sw <= 0 || *sh <= 0) {
 248                 *sw = w;
 249                 *sh = h;
 250         }
 251 }
 252
 253 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 254 {
 255         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 256         image_viewer_load_image(imageviewer);
 257 }
 258
 259 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 260                                       ImageViewer *imageviewer)
 261 {
 262         if (event->button == 1 && imageviewer->image) {
 263                 imageviewer->resize_img = !imageviewer->resize_img;
 264                 image_viewer_load_image(imageviewer);
 265                 return TRUE;
 266         }
 267         return FALSE;
 268 }
 269
 270 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 271                                   ImageViewer *imageviewer)
 272 {
 273         if (imageviewer->resize_img)
 274                 image_viewer_load_image(imageviewer);
 275 }
 276
 277 static MimeViewer *image_viewer_create(void)
 278 {
 279         ImageViewer *imageviewer;
 280         /*
 281          *  glade generated code (do not touch)
 282          */
 283         GtkWidget *notebook;
 284         GtkWidget *table1;
 285         GtkWidget *label3;
 286         GtkWidget *label4;
 287         GtkWidget *filename;
 288         GtkWidget *filesize;
 289         GtkWidget *load_button;
 290         GtkWidget *label5;
 291         GtkWidget *content_type;
 292         GtkWidget *scrolledwin;
 293         GtkWidget *error_lbl;
 294         GtkWidget *error_msg;
 295
 296         notebook = gtk_notebook_new();
 297         gtk_widget_show(notebook);
 298         GTK_WIDGET_UNSET_FLAGS(notebook, GTK_CAN_FOCUS);
 299         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 300         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 301
 302         table1 = gtk_table_new(5, 3, FALSE);
 303         gtk_widget_show(table1);
 304         gtk_container_add(GTK_CONTAINER(notebook), table1);
 305         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 306         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 307         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 308
 309         label3 = gtk_label_new(_("Filename:"));
 310         gtk_widget_show(label3);
 311         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 312                          (GtkAttachOptions) (GTK_FILL),
 313                          (GtkAttachOptions) (0), 0, 0);
 314         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 315
 316         label4 = gtk_label_new(_("Filesize:"));
 317         gtk_widget_show(label4);
 318         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 319                          (GtkAttachOptions) (GTK_FILL),
 320                          (GtkAttachOptions) (0), 0, 0);
 321         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 322
 323         filename = gtk_label_new("");
 324         gtk_widget_show(filename);
 325         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 326                          (GtkAttachOptions) (GTK_FILL),
 327                          (GtkAttachOptions) (0), 0, 0);
 328         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 329
 330         filesize = gtk_label_new("");
 331         gtk_widget_show(filesize);
 332         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 333                          (GtkAttachOptions) (GTK_FILL),
 334                          (GtkAttachOptions) (0), 0, 0);
 335         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 336
 337         label5 = gtk_label_new(_("Content-Type:"));
 338         gtk_widget_show(label5);
 339         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 340                          (GtkAttachOptions) (GTK_FILL),
 341                          (GtkAttachOptions) (0), 0, 0);
 342         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 343
 344         content_type = gtk_label_new("");
 345         gtk_widget_show(content_type);
 346         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 347                          (GtkAttachOptions) (GTK_FILL),
 348                          (GtkAttachOptions) (0), 0, 0);
 349         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 350
 351         error_lbl = gtk_label_new("");
 352         gtk_widget_show(error_lbl);
 353         gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
 354                          (GtkAttachOptions) (GTK_FILL),
 355                          (GtkAttachOptions) (0), 0, 0);
 356         gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
 357
 358         error_msg = gtk_label_new("");
 359         gtk_widget_show(error_msg);
 360         gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
 361                          (GtkAttachOptions) (GTK_FILL),
 362                          (GtkAttachOptions) (0), 0, 0);
 363         gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
 364
 365         load_button = gtk_button_new_with_label(_("Load Image"));
 366         gtk_widget_show(load_button);
 367         gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
 368                          (GtkAttachOptions) (GTK_FILL),
 369                          (GtkAttachOptions) (0), 0, 0);
 370
 371         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 372         gtk_widget_show(scrolledwin);
 373         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 374         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 375                                        GTK_POLICY_AUTOMATIC,
 376                                        GTK_POLICY_AUTOMATIC);
 377         /*
 378          *  end of glade code
 379          */
 380
 381         debug_print("Creating image view...\n");
 382         imageviewer = g_new0(ImageViewer, 1);
 383         imageviewer->mimeviewer.factory = &image_viewer_factory;
 384
 385         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 386         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 387         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 388         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 389         imageviewer->mimeviewer.get_selection = NULL;
 390
 391         imageviewer->resize_img   = prefs_common.resize_img;
 392
 393         imageviewer->scrolledwin  = scrolledwin;
 394         imageviewer->image        = NULL;
 395         imageviewer->notebook     = notebook;
 396         imageviewer->filename     = filename;
 397         imageviewer->filesize     = filesize;
 398         imageviewer->content_type = content_type;
 399         imageviewer->error_msg    = error_msg;
 400         imageviewer->error_lbl    = error_lbl;
 401         imageviewer->load_button = load_button;
 402
 403         g_object_ref(notebook);
 404
 405         g_signal_connect(G_OBJECT(load_button), "clicked",
 406                          G_CALLBACK(load_cb), imageviewer);
 407         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 408                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 409         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 410                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 411
 412         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 413
 414         return (MimeViewer *) imageviewer;
 415 }
 416
 417 static gchar *content_types[] =
 418         {"image/*", NULL};
 419
 420 MimeViewerFactory image_viewer_factory =
 421 {
 422         content_types,
 423         0,
 424
 425         image_viewer_create,
 426 };
 427
 428 void image_viewer_init(void)
 429 {
 430         mimeview_register_viewer_factory(&image_viewer_factory);
 431 }
 432
 433 void image_viewer_done(void)
 434 {
 435         mimeview_unregister_viewer_factory(&image_viewer_factory);
 436 }