src/plugins/image_viewer/viewer.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2003 Hiroyuki Yamamoto
   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 2 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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include <glib.h>
  25 #include <gtk/gtkscrolledwindow.h>
  26 #include <gtk/gtkpixmap.h>
  27
  28 #if HAVE_GDK_PIXBUF
  29 #  include <gdk-pixbuf/gdk-pixbuf.h>
  30 #else
  31 #if HAVE_GDK_IMLIB
  32 #  include <gdk_imlib.h>
  33 #endif
  34 #endif /* HAVE_GDK_PIXBUF */
  35
  36 #include "intl.h"
  37 #include "procmime.h"
  38 #include "utils.h"
  39 #include "mimeview.h"
  40
  41 #include "viewerprefs.h"
  42
  43 typedef struct _ImageViewer ImageViewer;
  44
  45 MimeViewerFactory image_viewer_factory;
  46 static void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
  47                                           gint * sw, gint * sh);
  48 static void image_viewer_clear_viewer(MimeViewer *imageviewer);
  49
  50 struct _ImageViewer
  51 {
  52         MimeViewer mimeviewer;
  53
  54         gchar     *file;
  55         MimeInfo  *mimeinfo;
  56
  57         GtkWidget *scrolledwin;
  58         GtkWidget *image;
  59         GtkWidget *notebook;
  60         GtkWidget *filename;
  61         GtkWidget *filesize;
  62         GtkWidget *content_type;
  63 };
  64
  65 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
  66 {
  67         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
  68
  69         debug_print("image_viewer_get_widget\n");
  70
  71         return imageviewer->notebook;
  72 }
  73
  74 #if HAVE_GDK_PIXBUF
  75 static void image_viewer_load_file(ImageViewer *imageviewer, const gchar *imgfile)
  76 {
  77         GdkPixbuf *pixbuf;
  78         GdkPixbuf *pixbuf_scaled;
  79         GdkPixmap *pixmap;
  80         GdkBitmap *mask;
  81         gint avail_width;
  82         gint avail_height;
  83         gint new_width;
  84         gint new_height;
  85         GError *error = NULL;
  86
  87         debug_print("image_viewer_show_mimepart\n");
  88
  89         pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  90         if (error) {
  91                 g_warning(error->message);
  92                 g_error_free(error);
  93         }
  94         if (!pixbuf) {
  95                 g_warning("Can't load the image.");
  96                 return;
  97         }
  98
  99         if (imageviewerprefs.resize_img) {
 100                 avail_width = imageviewer->notebook->parent->allocation.width;
 101                 avail_height = imageviewer->notebook->parent->allocation.height;
 102                 if (avail_width > 8) avail_width -= 8;
 103                 if (avail_height > 8) avail_height -= 8;
 104
 105                 image_viewer_get_resized_size(gdk_pixbuf_get_width(pixbuf),
 106                                  gdk_pixbuf_get_height(pixbuf),
 107                                  avail_width, avail_height,
 108                                  &new_width, &new_height);
 109
 110                 pixbuf_scaled = gdk_pixbuf_scale_simple
 111                         (pixbuf, new_width, new_height, GDK_INTERP_BILINEAR);
 112                 gdk_pixbuf_unref(pixbuf);
 113                 pixbuf = pixbuf_scaled;
 114         }
 115
 116         gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &mask, 0);
 117
 118         if (!imageviewer->image) {
 119                 imageviewer->image = gtk_pixmap_new(pixmap, mask);
 120
 121                 gtk_scrolled_window_add_with_viewport
 122                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 123                          imageviewer->image);
 124         } else
 125                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image), pixmap, mask);
 126
 127         gtk_widget_show(imageviewer->image);
 128
 129         gdk_pixbuf_unref(pixbuf);
 130 }
 131 #else
 132 #if HAVE_GDK_IMLIB
 133 static void image_viewer_load_file(ImageViewer *imageviewer, const gchar *imgfile)
 134 {
 135         GdkImlibImage *im;
 136         gint avail_width;
 137         gint avail_height;
 138         gint new_width;
 139         gint new_height;
 140
 141         debug_print("image_viewer_show_mimepart\n");
 142
 143         im = gdk_imlib_load_image(imgfile);
 144         if (!im) {
 145                 g_warning("Can't load the image.");
 146                 return;
 147         }
 148
 149         if (imageviewerprefs.resize_img) {
 150                 avail_width = imageviewer->notebook->parent->allocation.width;
 151                 avail_height = imageviewer->notebook->parent->allocation.height;
 152                 if (avail_width > 8) avail_width -= 8;
 153                 if (avail_height > 8) avail_height -= 8;
 154
 155                 image_viewer_get_resized_size(im->rgb_width, im->rgb_height,
 156                                  avail_width, avail_height,
 157                                  &new_width, &new_height);
 158         } else {
 159                 new_width = im->rgb_width;
 160                 new_height = im->rgb_height;
 161         }
 162
 163         gdk_imlib_render(im, new_width, new_height);
 164
 165         if (!imageviewer->image) {
 166                 imageviewer->image = gtk_pixmap_new(gdk_imlib_move_image(im),
 167                                                     gdk_imlib_move_mask(im));
 168
 169                 gtk_scrolled_window_add_with_viewport
 170                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 171                          imageviewer->image);
 172         } else
 173                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image),
 174                                gdk_imlib_move_image(im),
 175                                gdk_imlib_move_mask(im));
 176
 177         gtk_widget_show(imageviewer->image);
 178
 179         gdk_imlib_destroy_image(im);
 180 }
 181 #endif /* HAVE_GDK_IMLIB */
 182 #endif /* HAVE_GDK_PIXBUF */
 183
 184 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 185 {
 186         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 187
 188         if (!imageviewerprefs.display_img)
 189                 gtk_notebook_set_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 190         else
 191                 gtk_notebook_set_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 192 }
 193
 194 static void image_viewer_load_image(ImageViewer *imageviewer)
 195 {
 196         gchar *imgfile;
 197
 198         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 199         if (procmime_get_part(imgfile, imageviewer->file, imageviewer->mimeinfo) < 0) {
 200                 g_warning("Can't get mimepart file");
 201                 g_free(imgfile);
 202                 return;
 203         }
 204         image_viewer_load_file(imageviewer, imgfile);
 205         unlink(imgfile);
 206         g_free(imgfile);
 207 }
 208
 209 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 210 {
 211         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 212
 213         image_viewer_clear_viewer(_mimeviewer);
 214         g_free(imageviewer->file);
 215         imageviewer->file = g_strdup(file);
 216         imageviewer->mimeinfo = mimeinfo;
 217
 218         if (imageviewerprefs.display_img)
 219                 image_viewer_load_image(imageviewer);
 220         else {
 221                 gtk_label_set_text(GTK_LABEL(imageviewer->filename), mimeinfo->filename);
 222                 gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable(mimeinfo->size));
 223                 gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->content_type);
 224         }
 225 }
 226
 227 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 228 {
 229         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 230         GtkAdjustment *hadj, *vadj;
 231
 232         debug_print("image_viewer_clear_viewer\n");
 233
 234         image_viewer_set_notebook_page(_mimeviewer);
 235
 236         if (imageviewer->image != NULL)
 237                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image), NULL, NULL);
 238         hadj = gtk_scrolled_window_get_hadjustment
 239                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 240         gtk_adjustment_set_value(hadj, 0.0);
 241         vadj = gtk_scrolled_window_get_vadjustment
 242                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 243         gtk_adjustment_set_value(vadj, 0.0);
 244
 245         g_free(imageviewer->file);
 246         imageviewer->file = NULL;
 247         imageviewer->mimeinfo = NULL;
 248 }
 249
 250 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 251 {
 252         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 253
 254         debug_print("image_viewer_destroy_viewer\n");
 255
 256         image_viewer_clear_viewer(_mimeviewer);
 257         gtk_widget_unref(imageviewer->notebook);
 258         g_free(imageviewer);
 259 }
 260
 261 static void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 262                              gint *sw, gint *sh)
 263 {
 264         gfloat wratio = 1.0;
 265         gfloat hratio = 1.0;
 266         gfloat ratio  = 1.0;
 267
 268         if (w > aw)
 269                 wratio = (gfloat)aw / (gfloat)w;
 270         if (h > ah)
 271                 hratio = (gfloat)ah / (gfloat)h;
 272
 273         ratio = (wratio > hratio) ? hratio : wratio;
 274
 275         *sw = (gint)(w * ratio);
 276         *sh = (gint)(h * ratio);
 277
 278         /* be paranoid */
 279         if (*sw <= 0 || *sh <= 0) {
 280                 *sw = w;
 281                 *sh = h;
 282         }
 283 }
 284
 285 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 286 {
 287         gtk_notebook_set_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 288         image_viewer_load_image(imageviewer);
 289 }
 290
 291 MimeViewer *image_viewer_create(void)
 292 {
 293         ImageViewer *imageviewer;
 294         /*
 295          *  glade generated code (do not touch)
 296          */
 297         GtkWidget *notebook;
 298         GtkWidget *table1;
 299         GtkWidget *label3;
 300         GtkWidget *label4;
 301         GtkWidget *filename;
 302         GtkWidget *filesize;
 303         GtkWidget *load_button;
 304         GtkWidget *label5;
 305         GtkWidget *content_type;
 306         GtkWidget *scrolledwin;
 307
 308         notebook = gtk_notebook_new();
 309         gtk_widget_show(notebook);
 310         GTK_WIDGET_UNSET_FLAGS(notebook, GTK_CAN_FOCUS);
 311         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 312         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 313
 314         table1 = gtk_table_new(4, 3, FALSE);
 315         gtk_widget_show(table1);
 316         gtk_container_add(GTK_CONTAINER(notebook), table1);
 317         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 318         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 319         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 320
 321         label3 = gtk_label_new(_("Filename:"));
 322         gtk_widget_show(label3);
 323         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 324                          (GtkAttachOptions) (GTK_FILL),
 325                          (GtkAttachOptions) (0), 0, 0);
 326         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 327
 328         label4 = gtk_label_new(_("Filesize:"));
 329         gtk_widget_show(label4);
 330         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 331                          (GtkAttachOptions) (GTK_FILL),
 332                          (GtkAttachOptions) (0), 0, 0);
 333         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 334
 335         filename = gtk_label_new("");
 336         gtk_widget_show(filename);
 337         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 338                          (GtkAttachOptions) (GTK_FILL),
 339                          (GtkAttachOptions) (0), 0, 0);
 340         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 341
 342         filesize = gtk_label_new("");
 343         gtk_widget_show(filesize);
 344         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 345                          (GtkAttachOptions) (GTK_FILL),
 346                          (GtkAttachOptions) (0), 0, 0);
 347         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 348
 349         load_button = gtk_button_new_with_label(_("Load Image"));
 350         gtk_widget_show(load_button);
 351         gtk_table_attach(GTK_TABLE(table1), load_button, 1, 2, 3, 4,
 352                          (GtkAttachOptions) (GTK_FILL),
 353                          (GtkAttachOptions) (0), 0, 0);
 354
 355         label5 = gtk_label_new(_("Content-Type:"));
 356         gtk_widget_show(label5);
 357         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 358                          (GtkAttachOptions) (GTK_FILL),
 359                          (GtkAttachOptions) (0), 0, 0);
 360         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 361
 362         content_type = gtk_label_new("");
 363         gtk_widget_show(content_type);
 364         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 365                          (GtkAttachOptions) (GTK_FILL),
 366                          (GtkAttachOptions) (0), 0, 0);
 367         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 368
 369         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 370         gtk_widget_show(scrolledwin);
 371         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 372         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 373                                        GTK_POLICY_AUTOMATIC,
 374                                        GTK_POLICY_AUTOMATIC);
 375         /*
 376          *  end of glade code
 377          */
 378
 379         debug_print("Creating image view...\n");
 380         imageviewer = g_new0(ImageViewer, 1);
 381         imageviewer->mimeviewer.factory = &image_viewer_factory;
 382
 383         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 384         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 385         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 386         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 387
 388         imageviewer->scrolledwin  = scrolledwin;
 389         imageviewer->image        = NULL;
 390         imageviewer->notebook     = notebook;
 391         imageviewer->filename     = filename;
 392         imageviewer->filesize     = filesize;
 393         imageviewer->content_type = content_type;
 394
 395         gtk_widget_ref(notebook);
 396
 397         gtk_signal_connect(GTK_OBJECT(load_button), "released",
 398                            GTK_SIGNAL_FUNC(load_cb), imageviewer);
 399
 400         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 401
 402         return (MimeViewer *) imageviewer;
 403 }
 404
 405 static gchar *content_types[] =
 406         {"image/*", NULL};
 407
 408 MimeViewerFactory image_viewer_factory =
 409 {
 410         content_types,
 411         0,
 412
 413         image_viewer_create,
 414 };
 415
 416 void image_viewer_init(void)
 417 {
 418 #if HAVE_GDK_IMLIB
 419         gdk_imlib_init();
 420         gtk_widget_push_visual(gdk_imlib_get_visual());
 421         gtk_widget_push_colormap(gdk_imlib_get_colormap());
 422 #endif
 423
 424         mimeview_register_viewer_factory(&image_viewer_factory);
 425 }
 426
 427 void image_viewer_done(void)
 428 {
 429         mimeview_unregister_viewer_factory(&image_viewer_factory);
 430 }