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         gboolean   resize_img;
  57
  58         GtkWidget *scrolledwin;
  59         GtkWidget *image;
  60         GtkWidget *notebook;
  61         GtkWidget *filename;
  62         GtkWidget *filesize;
  63         GtkWidget *content_type;
  64 };
  65
  66 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
  67 {
  68         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
  69
  70         debug_print("image_viewer_get_widget\n");
  71
  72         return imageviewer->notebook;
  73 }
  74
  75 #if HAVE_GDK_PIXBUF
  76 static void image_viewer_load_file(ImageViewer *imageviewer, const gchar *imgfile)
  77 {
  78         GdkPixbuf *pixbuf;
  79         GdkPixbuf *pixbuf_scaled;
  80         GdkPixmap *pixmap;
  81         GdkBitmap *mask;
  82         gint avail_width;
  83         gint avail_height;
  84         gint new_width;
  85         gint new_height;
  86         GError *error = NULL;
  87
  88         debug_print("image_viewer_show_mimepart\n");
  89
  90         pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  91         if (error) {
  92                 g_warning(error->message);
  93                 g_error_free(error);
  94         }
  95         if (!pixbuf) {
  96                 g_warning("Can't load the image.");
  97                 return;
  98         }
  99
 100         if (imageviewer->resize_img) {
 101                 avail_width = imageviewer->notebook->parent->allocation.width;
 102                 avail_height = imageviewer->notebook->parent->allocation.height;
 103                 if (avail_width > 8) avail_width -= 8;
 104                 if (avail_height > 8) avail_height -= 8;
 105
 106                 image_viewer_get_resized_size(gdk_pixbuf_get_width(pixbuf),
 107                                  gdk_pixbuf_get_height(pixbuf),
 108                                  avail_width, avail_height,
 109                                  &new_width, &new_height);
 110
 111                 pixbuf_scaled = gdk_pixbuf_scale_simple
 112                         (pixbuf, new_width, new_height, GDK_INTERP_BILINEAR);
 113                 gdk_pixbuf_unref(pixbuf);
 114                 pixbuf = pixbuf_scaled;
 115         }
 116
 117         gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &mask, 0);
 118
 119         if (!imageviewer->image) {
 120                 imageviewer->image = gtk_pixmap_new(pixmap, mask);
 121
 122                 gtk_scrolled_window_add_with_viewport
 123                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 124                          imageviewer->image);
 125         } else
 126                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image), pixmap, mask);
 127
 128         gtk_widget_show(imageviewer->image);
 129
 130         gdk_pixbuf_unref(pixbuf);
 131 }
 132 #else
 133 #if HAVE_GDK_IMLIB
 134 static void image_viewer_load_file(ImageViewer *imageviewer, const gchar *imgfile)
 135 {
 136         GdkImlibImage *im;
 137         gint avail_width;
 138         gint avail_height;
 139         gint new_width;
 140         gint new_height;
 141
 142         debug_print("image_viewer_show_mimepart\n");
 143
 144         im = gdk_imlib_load_image(imgfile);
 145         if (!im) {
 146                 g_warning("Can't load the image.");
 147                 return;
 148         }
 149
 150         if (imageviewer->resize_img) {
 151                 avail_width = imageviewer->notebook->parent->allocation.width;
 152                 avail_height = imageviewer->notebook->parent->allocation.height;
 153                 if (avail_width > 8) avail_width -= 8;
 154                 if (avail_height > 8) avail_height -= 8;
 155
 156                 image_viewer_get_resized_size(im->rgb_width, im->rgb_height,
 157                                  avail_width, avail_height,
 158                                  &new_width, &new_height);
 159         } else {
 160                 new_width = im->rgb_width;
 161                 new_height = im->rgb_height;
 162         }
 163
 164         gdk_imlib_render(im, new_width, new_height);
 165
 166         if (!imageviewer->image) {
 167                 imageviewer->image = gtk_pixmap_new(gdk_imlib_move_image(im),
 168                                                     gdk_imlib_move_mask(im));
 169
 170                 gtk_scrolled_window_add_with_viewport
 171                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 172                          imageviewer->image);
 173         } else
 174                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image),
 175                                gdk_imlib_move_image(im),
 176                                gdk_imlib_move_mask(im));
 177
 178         gtk_widget_show(imageviewer->image);
 179
 180         gdk_imlib_destroy_image(im);
 181 }
 182 #endif /* HAVE_GDK_IMLIB */
 183 #endif /* HAVE_GDK_PIXBUF */
 184
 185 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 186 {
 187         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 188
 189         if (!imageviewerprefs.display_img)
 190                 gtk_notebook_set_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 191         else
 192                 gtk_notebook_set_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 193 }
 194
 195 static void image_viewer_load_image(ImageViewer *imageviewer)
 196 {
 197         gchar *imgfile;
 198
 199         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 200         if (procmime_get_part(imgfile, imageviewer->mimeinfo) < 0) {
 201                 g_warning("Can't get mimepart file");
 202                 g_free(imgfile);
 203                 return;
 204         }
 205         image_viewer_load_file(imageviewer, imgfile);
 206         unlink(imgfile);
 207         g_free(imgfile);
 208 }
 209
 210 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 211 {
 212         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 213
 214         image_viewer_clear_viewer(_mimeviewer);
 215         g_free(imageviewer->file);
 216         imageviewer->file = g_strdup(file);
 217         imageviewer->mimeinfo = mimeinfo;
 218
 219         if (imageviewerprefs.display_img)
 220                 image_viewer_load_image(imageviewer);
 221         else {
 222                 gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 223                                    procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 224                 gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable(mimeinfo->length));
 225                 gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 226         }
 227 }
 228
 229 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 230 {
 231         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 232         GtkAdjustment *hadj, *vadj;
 233
 234         debug_print("image_viewer_clear_viewer\n");
 235
 236         image_viewer_set_notebook_page(_mimeviewer);
 237
 238         if (imageviewer->image != NULL)
 239                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image), NULL, NULL);
 240         hadj = gtk_scrolled_window_get_hadjustment
 241                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 242         gtk_adjustment_set_value(hadj, 0.0);
 243         vadj = gtk_scrolled_window_get_vadjustment
 244                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 245         gtk_adjustment_set_value(vadj, 0.0);
 246
 247         g_free(imageviewer->file);
 248         imageviewer->file = NULL;
 249         imageviewer->mimeinfo = NULL;
 250         imageviewer->resize_img   = imageviewerprefs.resize_img;
 251 }
 252
 253 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 254 {
 255         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 256
 257         debug_print("image_viewer_destroy_viewer\n");
 258
 259         image_viewer_clear_viewer(_mimeviewer);
 260         gtk_widget_unref(imageviewer->notebook);
 261         g_free(imageviewer);
 262 }
 263
 264 static void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 265                              gint *sw, gint *sh)
 266 {
 267         gfloat wratio = 1.0;
 268         gfloat hratio = 1.0;
 269         gfloat ratio  = 1.0;
 270
 271         if (w > aw)
 272                 wratio = (gfloat)aw / (gfloat)w;
 273         if (h > ah)
 274                 hratio = (gfloat)ah / (gfloat)h;
 275
 276         ratio = (wratio > hratio) ? hratio : wratio;
 277
 278         *sw = (gint)(w * ratio);
 279         *sh = (gint)(h * ratio);
 280
 281         /* be paranoid */
 282         if (*sw <= 0 || *sh <= 0) {
 283                 *sw = w;
 284                 *sh = h;
 285         }
 286 }
 287
 288 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 289 {
 290         gtk_notebook_set_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 291         image_viewer_load_image(imageviewer);
 292 }
 293
 294 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 295                                       ImageViewer *imageviewer)
 296 {
 297         if (event->button == 1 && imageviewer->image) {
 298                 imageviewer->resize_img = !imageviewer->resize_img;
 299                 image_viewer_load_image(imageviewer);
 300                 return TRUE;
 301         }
 302         return FALSE;
 303 }
 304
 305 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 306                                   ImageViewer *imageviewer)
 307 {
 308         if (imageviewer->resize_img)
 309                 image_viewer_load_image(imageviewer);
 310 }
 311
 312 MimeViewer *image_viewer_create(void)
 313 {
 314         ImageViewer *imageviewer;
 315         /*
 316          *  glade generated code (do not touch)
 317          */
 318         GtkWidget *notebook;
 319         GtkWidget *table1;
 320         GtkWidget *label3;
 321         GtkWidget *label4;
 322         GtkWidget *filename;
 323         GtkWidget *filesize;
 324         GtkWidget *load_button;
 325         GtkWidget *label5;
 326         GtkWidget *content_type;
 327         GtkWidget *scrolledwin;
 328
 329         notebook = gtk_notebook_new();
 330         gtk_widget_show(notebook);
 331         GTK_WIDGET_UNSET_FLAGS(notebook, GTK_CAN_FOCUS);
 332         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 333         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 334
 335         table1 = gtk_table_new(4, 3, FALSE);
 336         gtk_widget_show(table1);
 337         gtk_container_add(GTK_CONTAINER(notebook), table1);
 338         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 339         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 340         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 341
 342         label3 = gtk_label_new(_("Filename:"));
 343         gtk_widget_show(label3);
 344         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 345                          (GtkAttachOptions) (GTK_FILL),
 346                          (GtkAttachOptions) (0), 0, 0);
 347         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 348
 349         label4 = gtk_label_new(_("Filesize:"));
 350         gtk_widget_show(label4);
 351         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 352                          (GtkAttachOptions) (GTK_FILL),
 353                          (GtkAttachOptions) (0), 0, 0);
 354         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 355
 356         filename = gtk_label_new("");
 357         gtk_widget_show(filename);
 358         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 359                          (GtkAttachOptions) (GTK_FILL),
 360                          (GtkAttachOptions) (0), 0, 0);
 361         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 362
 363         filesize = gtk_label_new("");
 364         gtk_widget_show(filesize);
 365         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 366                          (GtkAttachOptions) (GTK_FILL),
 367                          (GtkAttachOptions) (0), 0, 0);
 368         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 369
 370         load_button = gtk_button_new_with_label(_("Load Image"));
 371         gtk_widget_show(load_button);
 372         gtk_table_attach(GTK_TABLE(table1), load_button, 1, 2, 3, 4,
 373                          (GtkAttachOptions) (GTK_FILL),
 374                          (GtkAttachOptions) (0), 0, 0);
 375
 376         label5 = gtk_label_new(_("Content-Type:"));
 377         gtk_widget_show(label5);
 378         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 379                          (GtkAttachOptions) (GTK_FILL),
 380                          (GtkAttachOptions) (0), 0, 0);
 381         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 382
 383         content_type = gtk_label_new("");
 384         gtk_widget_show(content_type);
 385         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 386                          (GtkAttachOptions) (GTK_FILL),
 387                          (GtkAttachOptions) (0), 0, 0);
 388         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 389
 390         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 391         gtk_widget_show(scrolledwin);
 392         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 393         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 394                                        GTK_POLICY_AUTOMATIC,
 395                                        GTK_POLICY_AUTOMATIC);
 396         /*
 397          *  end of glade code
 398          */
 399
 400         debug_print("Creating image view...\n");
 401         imageviewer = g_new0(ImageViewer, 1);
 402         imageviewer->mimeviewer.factory = &image_viewer_factory;
 403
 404         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 405         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 406         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 407         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 408
 409         imageviewer->resize_img   = imageviewerprefs.resize_img;
 410
 411         imageviewer->scrolledwin  = scrolledwin;
 412         imageviewer->image        = NULL;
 413         imageviewer->notebook     = notebook;
 414         imageviewer->filename     = filename;
 415         imageviewer->filesize     = filesize;
 416         imageviewer->content_type = content_type;
 417
 418         gtk_widget_ref(notebook);
 419
 420         gtk_signal_connect(GTK_OBJECT(load_button), "released",
 421                            GTK_SIGNAL_FUNC(load_cb), imageviewer);
 422         gtk_signal_connect(GTK_OBJECT(scrolledwin), "button-press-event",
 423                            GTK_SIGNAL_FUNC(scrolledwin_button_cb), imageviewer);
 424         gtk_signal_connect(GTK_OBJECT(scrolledwin), "size-allocate",
 425                            GTK_SIGNAL_FUNC(scrolledwin_resize_cb), imageviewer);
 426
 427         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 428
 429         return (MimeViewer *) imageviewer;
 430 }
 431
 432 static gchar *content_types[] =
 433         {"image/*", NULL};
 434
 435 MimeViewerFactory image_viewer_factory =
 436 {
 437         content_types,
 438         0,
 439
 440         image_viewer_create,
 441 };
 442
 443 void image_viewer_init(void)
 444 {
 445 #if HAVE_GDK_IMLIB
 446         gdk_imlib_init();
 447         gtk_widget_push_visual(gdk_imlib_get_visual());
 448         gtk_widget_push_colormap(gdk_imlib_get_colormap());
 449 #endif
 450
 451         mimeview_register_viewer_factory(&image_viewer_factory);
 452 }
 453
 454 void image_viewer_done(void)
 455 {
 456         mimeview_unregister_viewer_factory(&image_viewer_factory);
 457 }