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