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 <glib/gi18n.h>
  26 #include <gtk/gtkscrolledwindow.h>
  27 #include <gtk/gtkpixmap.h>
  28
  29 #if HAVE_GDK_PIXBUF
  30 #  include <gdk-pixbuf/gdk-pixbuf.h>
  31 #else
  32 #if HAVE_GDK_IMLIB
  33 #  include <gdk_imlib.h>
  34 #endif
  35 #endif /* HAVE_GDK_PIXBUF */
  36
  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                 g_object_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(imageviewer->image, pixmap, mask);
 127
 128         gtk_widget_show(imageviewer->image);
 129
 130         g_object_unref(pixbuf);
 131 }
 132 #endif /* HAVE_GDK_PIXBUF */
 133
 134 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 135 {
 136         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 137
 138         if (!imageviewerprefs.display_img)
 139                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 140         else
 141                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 142 }
 143
 144 static void image_viewer_load_image(ImageViewer *imageviewer)
 145 {
 146         gchar *imgfile;
 147
 148         if (imageviewer->mimeinfo == NULL)
 149                 return;
 150
 151         imgfile = procmime_get_tmp_file_name(imageviewer->mimeinfo);
 152         if (procmime_get_part(imgfile, imageviewer->mimeinfo) < 0) {
 153                 g_warning("Can't get mimepart file");
 154                 g_free(imgfile);
 155                 return;
 156         }
 157         image_viewer_load_file(imageviewer, imgfile);
 158         unlink(imgfile);
 159         g_free(imgfile);
 160 }
 161
 162 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 163 {
 164         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 165
 166         image_viewer_clear_viewer(_mimeviewer);
 167         g_free(imageviewer->file);
 168         imageviewer->file = g_strdup(file);
 169         imageviewer->mimeinfo = mimeinfo;
 170
 171         if (imageviewerprefs.display_img)
 172                 image_viewer_load_image(imageviewer);
 173         else {
 174                 gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 175                                    procmime_mimeinfo_get_parameter(mimeinfo, "name"));
 176                 gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable(mimeinfo->length));
 177                 gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 178         }
 179 }
 180
 181 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 182 {
 183         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 184         GtkAdjustment *hadj, *vadj;
 185
 186         debug_print("image_viewer_clear_viewer\n");
 187
 188         image_viewer_set_notebook_page(_mimeviewer);
 189
 190         if (imageviewer->image != NULL)
 191                 gtk_pixmap_set(GTK_PIXMAP(imageviewer->image), NULL, NULL);
 192         hadj = gtk_scrolled_window_get_hadjustment
 193                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 194         gtk_adjustment_set_value(hadj, 0.0);
 195         vadj = gtk_scrolled_window_get_vadjustment
 196                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 197         gtk_adjustment_set_value(vadj, 0.0);
 198
 199         g_free(imageviewer->file);
 200         imageviewer->file = NULL;
 201         imageviewer->mimeinfo = NULL;
 202         imageviewer->resize_img = imageviewerprefs.resize_img;
 203 }
 204
 205 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 206 {
 207         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 208
 209         debug_print("image_viewer_destroy_viewer\n");
 210
 211         image_viewer_clear_viewer(_mimeviewer);
 212         g_object_unref(imageviewer->notebook);
 213         g_free(imageviewer);
 214 }
 215
 216 static void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 217                              gint *sw, gint *sh)
 218 {
 219         gfloat wratio = 1.0;
 220         gfloat hratio = 1.0;
 221         gfloat ratio  = 1.0;
 222
 223         if (w > aw)
 224                 wratio = (gfloat)aw / (gfloat)w;
 225         if (h > ah)
 226                 hratio = (gfloat)ah / (gfloat)h;
 227
 228         ratio = (wratio > hratio) ? hratio : wratio;
 229
 230         *sw = (gint)(w * ratio);
 231         *sh = (gint)(h * ratio);
 232
 233         /* be paranoid */
 234         if (*sw <= 0 || *sh <= 0) {
 235                 *sw = w;
 236                 *sh = h;
 237         }
 238 }
 239
 240 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 241 {
 242         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 243         image_viewer_load_image(imageviewer);
 244 }
 245
 246 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 247                                       ImageViewer *imageviewer)
 248 {
 249         if (event->button == 1 && imageviewer->image) {
 250                 imageviewer->resize_img = !imageviewer->resize_img;
 251                 image_viewer_load_image(imageviewer);
 252                 return TRUE;
 253         }
 254         return FALSE;
 255 }
 256
 257 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 258                                   ImageViewer *imageviewer)
 259 {
 260         if (imageviewer->resize_img)
 261                 image_viewer_load_image(imageviewer);
 262 }
 263
 264 MimeViewer *image_viewer_create(void)
 265 {
 266         ImageViewer *imageviewer;
 267         /*
 268          *  glade generated code (do not touch)
 269          */
 270         GtkWidget *notebook;
 271         GtkWidget *table1;
 272         GtkWidget *label3;
 273         GtkWidget *label4;
 274         GtkWidget *filename;
 275         GtkWidget *filesize;
 276         GtkWidget *load_button;
 277         GtkWidget *label5;
 278         GtkWidget *content_type;
 279         GtkWidget *scrolledwin;
 280
 281         notebook = gtk_notebook_new();
 282         gtk_widget_show(notebook);
 283         GTK_WIDGET_UNSET_FLAGS(notebook, GTK_CAN_FOCUS);
 284         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 285         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 286
 287         table1 = gtk_table_new(4, 3, FALSE);
 288         gtk_widget_show(table1);
 289         gtk_container_add(GTK_CONTAINER(notebook), table1);
 290         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 291         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
 292         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
 293
 294         label3 = gtk_label_new(_("Filename:"));
 295         gtk_widget_show(label3);
 296         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
 297                          (GtkAttachOptions) (GTK_FILL),
 298                          (GtkAttachOptions) (0), 0, 0);
 299         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
 300
 301         label4 = gtk_label_new(_("Filesize:"));
 302         gtk_widget_show(label4);
 303         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
 304                          (GtkAttachOptions) (GTK_FILL),
 305                          (GtkAttachOptions) (0), 0, 0);
 306         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
 307
 308         filename = gtk_label_new("");
 309         gtk_widget_show(filename);
 310         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
 311                          (GtkAttachOptions) (GTK_FILL),
 312                          (GtkAttachOptions) (0), 0, 0);
 313         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
 314
 315         filesize = gtk_label_new("");
 316         gtk_widget_show(filesize);
 317         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
 318                          (GtkAttachOptions) (GTK_FILL),
 319                          (GtkAttachOptions) (0), 0, 0);
 320         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
 321
 322         load_button = gtk_button_new_with_label(_("Load Image"));
 323         gtk_widget_show(load_button);
 324         gtk_table_attach(GTK_TABLE(table1), load_button, 1, 2, 3, 4,
 325                          (GtkAttachOptions) (GTK_FILL),
 326                          (GtkAttachOptions) (0), 0, 0);
 327
 328         label5 = gtk_label_new(_("Content-Type:"));
 329         gtk_widget_show(label5);
 330         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
 331                          (GtkAttachOptions) (GTK_FILL),
 332                          (GtkAttachOptions) (0), 0, 0);
 333         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
 334
 335         content_type = gtk_label_new("");
 336         gtk_widget_show(content_type);
 337         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
 338                          (GtkAttachOptions) (GTK_FILL),
 339                          (GtkAttachOptions) (0), 0, 0);
 340         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
 341
 342         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 343         gtk_widget_show(scrolledwin);
 344         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
 345         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 346                                        GTK_POLICY_AUTOMATIC,
 347                                        GTK_POLICY_AUTOMATIC);
 348         /*
 349          *  end of glade code
 350          */
 351
 352         debug_print("Creating image view...\n");
 353         imageviewer = g_new0(ImageViewer, 1);
 354         imageviewer->mimeviewer.factory = &image_viewer_factory;
 355
 356         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 357         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 358         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 359         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 360
 361         imageviewer->resize_img   = imageviewerprefs.resize_img;
 362
 363         imageviewer->scrolledwin  = scrolledwin;
 364         imageviewer->image        = NULL;
 365         imageviewer->notebook     = notebook;
 366         imageviewer->filename     = filename;
 367         imageviewer->filesize     = filesize;
 368         imageviewer->content_type = content_type;
 369
 370         gtk_widget_ref(notebook);
 371
 372         g_signal_connect(G_OBJECT(load_button), "released",
 373                          G_CALLBACK(load_cb), imageviewer);
 374         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
 375                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
 376         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 377                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 378
 379         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 380
 381         return (MimeViewer *) imageviewer;
 382 }
 383
 384 static gchar *content_types[] =
 385         {"image/*", NULL};
 386
 387 MimeViewerFactory image_viewer_factory =
 388 {
 389         content_types,
 390         0,
 391
 392         image_viewer_create,
 393 };
 394
 395 void image_viewer_init(void)
 396 {
 397 #if HAVE_GDK_IMLIB
 398         gdk_imlib_init();
 399         gtk_widget_push_visual(gdk_imlib_get_visual());
 400         gtk_widget_push_colormap(gdk_imlib_get_colormap());
 401 #endif
 402
 403         mimeview_register_viewer_factory(&image_viewer_factory);
 404 }
 405
 406 void image_viewer_done(void)
 407 {
 408         mimeview_unregister_viewer_factory(&image_viewer_factory);
 409 }