src/image_viewer.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2006 Hiroyuki Yamamoto and the Sylpheed-Claws 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  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
  42 struct _ImageViewer
  43 {
  44         MimeViewer mimeviewer;
  45
  46         gchar     *file;
  47         MimeInfo  *mimeinfo;
  48         gboolean   resize_img;
  49
  50         GtkWidget *scrolledwin;
  51         GtkWidget *image;
  52         GtkWidget *notebook;
  53         GtkWidget *filename;
  54         GtkWidget *filesize;
  55         GtkWidget *content_type;
  56 };
  57
  58 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
  59 {
  60         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
  61
  62         debug_print("image_viewer_get_widget\n");
  63
  64         return imageviewer->notebook;
  65 }
  66
  67 static void image_viewer_load_file(ImageViewer *imageviewer, const gchar *imgfile)
  68 {
  69         GdkPixbuf *pixbuf;
  70         GdkPixmap *pixmap;
  71         GdkBitmap *mask;
  72         gint avail_width;
  73         gint avail_height;
  74         GError *error = NULL;
  75
  76         debug_print("image_viewer_show_mimepart\n");
  77
  78         if (!imageviewer->resize_img) {
  79                 pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  80         } else {
  81                 gint w, h;
  82                 gdk_pixbuf_get_file_info(imgfile, &w, &h);
  83                 avail_width = imageviewer->notebook->parent->allocation.width;
  84                 avail_height = imageviewer->notebook->parent->allocation.height;
  85                 if (avail_width > 8) avail_width -= 8;
  86                 if (avail_height > 8) avail_height -= 8;
  87                 if (w > avail_width || h > avail_height)
  88                         pixbuf = gdk_pixbuf_new_from_file_at_scale(imgfile, avail_width,
  89                                 avail_height, TRUE, &error);
  90                 else
  91                         pixbuf = gdk_pixbuf_new_from_file(imgfile, &error);
  92         }
  93
  94         if (error) {
  95                 g_warning(error->message);
  96                 g_error_free(error);
  97         }
  98         if (!pixbuf) {
  99                 g_warning("Can't load the image.");
 100                 return;
 101         }
 102
 103         gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &mask, 0);
 104
 105         if (!imageviewer->image) {
 106                 imageviewer->image = gtk_pixmap_new(pixmap, mask);
 107
 108                 gtk_scrolled_window_add_with_viewport
 109                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
 110                          imageviewer->image);
 111         } else
 112                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image), pixmap, mask);
 113
 114         gtk_widget_show(imageviewer->image);
 115
 116         g_object_unref(pixbuf);
 117 }
 118
 119 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 120 {
 121         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 122
 123         if (!prefs_common.display_img)
 124                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 125         else
 126                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 127 }
 128
 129 static void image_viewer_load_image(ImageViewer *imageviewer)
 130 {
 131         gchar *imgfile;
 132
 133         if (imageviewer->mimeinfo == NULL)
 134                 return;
 135
 136         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 137         if (procmime_get_part(imgfile, imageviewer->mimeinfo) < 0) {
 138                 g_warning("Can't get mimepart file");
 139                 g_free(imgfile);
 140                 return;
 141         }
 142         image_viewer_load_file(imageviewer, imgfile);
 143         g_unlink(imgfile);
 144         g_free(imgfile);
 145 }
 146
 147 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 148 {
 149         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 150
 151         image_viewer_clear_viewer(_mimeviewer);
 152         g_free(imageviewer->file);
 153         imageviewer->file = g_strdup(file);
 154         imageviewer->mimeinfo = mimeinfo;
 155
 156         if (prefs_common.display_img)
 157                 image_viewer_load_image(imageviewer);
 158         else {
 159                 gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 160                                    procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 161                 gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable(mimeinfo->length));
 162                 gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 163         }
 164 }
 165
 166 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 167 {
 168         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 169         GtkAdjustment *hadj, *vadj;
 170
 171         debug_print("image_viewer_clear_viewer\n");
 172
 173         image_viewer_set_notebook_page(_mimeviewer);
 174
 175         if (imageviewer->image != NULL)
 176                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image), NULL, NULL);
 177
 178         if (imageviewer->scrolledwin) {
 179                 hadj = gtk_scrolled_window_get_hadjustment
 180                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 181                 if (hadj)
 182                         gtk_adjustment_set_value(hadj, 0.0);
 183                 vadj = gtk_scrolled_window_get_vadjustment
 184                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 185                 if (vadj)
 186                         gtk_adjustment_set_value(vadj, 0.0);
 187         }
 188         g_free(imageviewer->file);
 189         imageviewer->file = NULL;
 190         imageviewer->mimeinfo = NULL;
 191         imageviewer->resize_img = prefs_common.resize_img;
 192 }
 193
 194 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 195 {
 196         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 197
 198         debug_print("image_viewer_destroy_viewer\n");
 199
 200         image_viewer_clear_viewer(_mimeviewer);
 201         g_object_unref(imageviewer->notebook);
 202         g_free(imageviewer);
 203 }
 204
 205 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 206                              gint *sw, gint *sh)
 207 {
 208         gfloat wratio = 1.0;
 209         gfloat hratio = 1.0;
 210         gfloat ratio  = 1.0;
 211
 212         if (w > aw)
 213                 wratio = (gfloat)aw / (gfloat)w;
 214         if (h > ah)
 215                 hratio = (gfloat)ah / (gfloat)h;
 216
 217         ratio = (wratio > hratio) ? hratio : wratio;
 218
 219         *sw = (gint)(w * ratio);
 220         *sh = (gint)(h * ratio);
 221
 222         /* be paranoid */
 223         if (*sw <= 0 || *sh <= 0) {
 224                 *sw = w;
 225                 *sh = h;
 226         }
 227 }
 228
 229 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 230 {
 231         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 232         image_viewer_load_image(imageviewer);
 233 }
 234
 235 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 236                                       ImageViewer *imageviewer)
 237 {
 238         if (event->button == 1 && imageviewer->image) {
 239                 imageviewer->resize_img = !imageviewer->resize_img;
 240                 image_viewer_load_image(imageviewer);
 241                 return TRUE;
 242         }
 243         return FALSE;
 244 }
 245
 246 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 247                                   ImageViewer *imageviewer)
 248 {
 249         if (imageviewer->resize_img)
 250                 image_viewer_load_image(imageviewer);
 251 }
 252
 253 MimeViewer *image_viewer_create(void)
 254 {
 255         ImageViewer *imageviewer;
 256         /*
 257          *  glade generated code (do not touch)
 258          */
 259         GtkWidget *notebook;
 260         GtkWidget *table1;
 261         GtkWidget *label3;
 262         GtkWidget *label4;
 263         GtkWidget *filename;
 264         GtkWidget *filesize;
 265         GtkWidget *load_button;
 266         GtkWidget *label5;
 267         GtkWidget *content_type;
 268         GtkWidget *scrolledwin;
 269
 270         notebook = gtk_notebook_new();
 271         gtk_widget_show(notebook);
 272         GTK_WIDGET_UNSET_FLAGS(notebook, GTK_CAN_FOCUS);
 273         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 274         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 275
 276         table1 = gtk_table_new(4, 3, FALSE);
 277         gtk_widget_show(table1);
 278         gtk_container_add(GTK_CONTAINER(notebook), table1);
 279         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 280         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 281         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 282
 283         label3 = gtk_label_new(_("Filename:"));
 284         gtk_widget_show(label3);
 285         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 286                          (GtkAttachOptions) (GTK_FILL),
 287                          (GtkAttachOptions) (0), 0, 0);
 288         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 289
 290         label4 = gtk_label_new(_("Filesize:"));
 291         gtk_widget_show(label4);
 292         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 293                          (GtkAttachOptions) (GTK_FILL),
 294                          (GtkAttachOptions) (0), 0, 0);
 295         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 296
 297         filename = gtk_label_new("");
 298         gtk_widget_show(filename);
 299         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 300                          (GtkAttachOptions) (GTK_FILL),
 301                          (GtkAttachOptions) (0), 0, 0);
 302         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 303
 304         filesize = gtk_label_new("");
 305         gtk_widget_show(filesize);
 306         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 307                          (GtkAttachOptions) (GTK_FILL),
 308                          (GtkAttachOptions) (0), 0, 0);
 309         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 310
 311         load_button = gtk_button_new_with_label(_("Load Image"));
 312         gtk_widget_show(load_button);
 313         gtk_table_attach(GTK_TABLE(table1), load_button, 1, 2, 3, 4,
 314                          (GtkAttachOptions) (GTK_FILL),
 315                          (GtkAttachOptions) (0), 0, 0);
 316
 317         label5 = gtk_label_new(_("Content-Type:"));
 318         gtk_widget_show(label5);
 319         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 320                          (GtkAttachOptions) (GTK_FILL),
 321                          (GtkAttachOptions) (0), 0, 0);
 322         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 323
 324         content_type = gtk_label_new("");
 325         gtk_widget_show(content_type);
 326         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 327                          (GtkAttachOptions) (GTK_FILL),
 328                          (GtkAttachOptions) (0), 0, 0);
 329         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 330
 331         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 332         gtk_widget_show(scrolledwin);
 333         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 334         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 335                                        GTK_POLICY_AUTOMATIC,
 336                                        GTK_POLICY_AUTOMATIC);
 337         /*
 338          *  end of glade code
 339          */
 340
 341         debug_print("Creating image view...\n");
 342         imageviewer = g_new0(ImageViewer, 1);
 343         imageviewer->mimeviewer.factory = &image_viewer_factory;
 344
 345         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 346         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 347         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 348         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 349         imageviewer->mimeviewer.get_selection = NULL;
 350
 351         imageviewer->resize_img   = prefs_common.resize_img;
 352
 353         imageviewer->scrolledwin  = scrolledwin;
 354         imageviewer->image        = NULL;
 355         imageviewer->notebook     = notebook;
 356         imageviewer->filename     = filename;
 357         imageviewer->filesize     = filesize;
 358         imageviewer->content_type = content_type;
 359
 360         gtk_widget_ref(notebook);
 361
 362         g_signal_connect(G_OBJECT(load_button), "clicked",
 363                          G_CALLBACK(load_cb), imageviewer);
 364         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 365                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 366         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 367                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 368
 369         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 370
 371         return (MimeViewer *) imageviewer;
 372 }
 373
 374 static gchar *content_types[] =
 375         {"image/*", NULL};
 376
 377 MimeViewerFactory image_viewer_factory =
 378 {
 379         content_types,
 380         0,
 381
 382         image_viewer_create,
 383 };
 384
 385 void image_viewer_init(void)
 386 {
 387         mimeview_register_viewer_factory(&image_viewer_factory);
 388 }
 389
 390 void image_viewer_done(void)
 391 {
 392         mimeview_unregister_viewer_factory(&image_viewer_factory);
 393 }