src/image_viewer.c

   1 /*
   2  * Claws Mail -- a GTK based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2021 the Claws Mail team and 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 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 #ifdef HAVE_CONFIG_H
  20 #  include "config.h"
  21 #include "claws-features.h"
  22 #endif
  23
  24 #include <glib.h>
  25 #include <glib/gi18n.h>
  26 #include <gtk/gtk.h>
  27
  28 #include "procmime.h"
  29 #include "file-utils.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         gboolean   fit_img_height;
  51
  52         GtkWidget *scrolledwin;
  53         GtkWidget *image;
  54         GtkWidget *notebook;
  55         GtkWidget *filename;
  56         GtkWidget *filesize;
  57         GtkWidget *error_lbl;
  58         GtkWidget *error_msg;
  59         GtkWidget *content_type;
  60         GtkWidget *load_button;
  61 };
  62
  63 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
  64 {
  65         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
  66
  67         debug_print("image_viewer_get_widget\n");
  68
  69         return imageviewer->notebook;
  70 }
  71
  72 static void image_viewer_load_image(ImageViewer *imageviewer)
  73 {
  74         GtkAllocation allocation;
  75         GdkPixbufAnimation *animation = NULL;
  76         GdkPixbuf *pixbuf = NULL;
  77         GError *error = NULL;
  78         GInputStream *stream;
  79
  80         cm_return_if_fail(imageviewer != NULL);
  81
  82         if (imageviewer->mimeinfo == NULL)
  83                 return;
  84
  85         stream = procmime_get_part_as_inputstream(imageviewer->mimeinfo);
  86         if (stream == NULL) {
  87                 g_warning("couldn't get image MIME part");
  88                 return;
  89         }
  90
  91 #if GDK_PIXBUF_MINOR >= 28
  92         animation = gdk_pixbuf_animation_new_from_stream(stream, NULL, &error);
  93 #else
  94         pixbuf = gdk_pixbuf_new_from_stream(stream, NULL, &error);
  95 #endif
  96         g_object_unref(stream);
  97
  98         if (error) {
  99                 g_warning("couldn't load image: %s", error->message);
 100                 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
 101                 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
 102                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 103                 gtk_widget_hide(imageviewer->load_button);
 104                 g_error_free(error);
 105                 return;
 106         }
 107
 108 #if GDK_PIXBUF_MINOR >= 28
 109         if ((animation && gdk_pixbuf_animation_is_static_image(animation)) ||
 110             imageviewer->resize_img || imageviewer->fit_img_height) {
 111                 pixbuf = gdk_pixbuf_animation_get_static_image(animation);
 112                 g_object_ref(pixbuf);
 113                 g_object_unref(animation);
 114                 animation = NULL;
 115 #else
 116         if (imageviewer->resize_img || imageviewer->fit_img_height) {
 117 #endif
 118                 if (imageviewer->resize_img) {
 119                         gtk_widget_get_allocation(imageviewer->scrolledwin, &allocation);
 120                         pixbuf = claws_load_pixbuf_fitting(pixbuf, FALSE,
 121                                                            imageviewer->fit_img_height,
 122                                                            allocation.width,
 123                                                            allocation.height);
 124                 } else
 125                         pixbuf = claws_load_pixbuf_fitting(pixbuf, FALSE,
 126                                                            imageviewer->fit_img_height,
 127                                                            -1, -1);
 128         }
 129
 130         if (!pixbuf && !animation) {
 131                 g_warning("couldn't load the image");
 132                 return;
 133         }
 134
 135         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
 136                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 137
 138         if (animation)
 139                 gtk_image_set_from_animation(GTK_IMAGE(imageviewer->image), animation);
 140         else
 141                 gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
 142
 143         gtk_widget_get_allocation(imageviewer->scrolledwin, &allocation);
 144         gtk_widget_size_allocate(imageviewer->scrolledwin, &allocation);
 145
 146         gtk_widget_show(imageviewer->image);
 147
 148         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
 149                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 150
 151         if (pixbuf)
 152                 g_object_unref(pixbuf);
 153         if (animation)
 154                 g_object_unref(animation);
 155 }
 156
 157 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
 158 {
 159         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 160
 161         if (!prefs_common.display_img)
 162                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
 163         else
 164                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 165 }
 166
 167 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
 168 {
 169         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 170
 171         debug_print("image_viewer_show_mimepart\n");
 172
 173         image_viewer_clear_viewer(_mimeviewer);
 174         g_free(imageviewer->file);
 175         imageviewer->file = g_strdup(file);
 176         imageviewer->mimeinfo = mimeinfo;
 177
 178         gtk_label_set_text(GTK_LABEL(imageviewer->filename),
 179                            (procmime_mimeinfo_get_parameter(mimeinfo, "name") != NULL)?
 180                            procmime_mimeinfo_get_parameter(mimeinfo, "name") :
 181                            procmime_mimeinfo_get_parameter(mimeinfo, "filename"));
 182         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
 183         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
 184         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
 185         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
 186
 187         if (prefs_common.display_img)
 188                 image_viewer_load_image(imageviewer);
 189 }
 190
 191 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
 192 {
 193         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 194         GtkAdjustment *hadj, *vadj;
 195
 196         debug_print("image_viewer_clear_viewer\n");
 197
 198         image_viewer_set_notebook_page(_mimeviewer);
 199
 200         if (imageviewer->scrolledwin) {
 201                 hadj = gtk_scrolled_window_get_hadjustment
 202                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 203                 if (hadj) {
 204                         gtk_adjustment_set_value(hadj, 0.0);
 205                 }
 206                 vadj = gtk_scrolled_window_get_vadjustment
 207                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
 208                 if (vadj) {
 209                         gtk_adjustment_set_value(vadj, 0.0);
 210                 }
 211         }
 212         g_free(imageviewer->file);
 213         imageviewer->file = NULL;
 214         imageviewer->mimeinfo = NULL;
 215         imageviewer->resize_img = prefs_common.resize_img;
 216         imageviewer->fit_img_height = prefs_common.fit_img_height;
 217 }
 218
 219 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
 220 {
 221         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
 222
 223         debug_print("image_viewer_destroy_viewer\n");
 224
 225         image_viewer_clear_viewer(_mimeviewer);
 226         g_object_unref(imageviewer->notebook);
 227         g_free(imageviewer);
 228 }
 229
 230 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
 231                              gint *sw, gint *sh)
 232 {
 233         gfloat wratio = 1.0;
 234         gfloat hratio = 1.0;
 235         gfloat ratio  = 1.0;
 236
 237         if (w > aw)
 238                 wratio = (gfloat)aw / (gfloat)w;
 239         if (h > ah)
 240                 hratio = (gfloat)ah / (gfloat)h;
 241
 242         ratio = (wratio > hratio) ? hratio : wratio;
 243
 244         *sw = (gint)(w * ratio);
 245         *sh = (gint)(h * ratio);
 246
 247         /* be paranoid */
 248         if (*sw <= 0 || *sh <= 0) {
 249                 *sw = w;
 250                 *sh = h;
 251         }
 252 }
 253
 254 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
 255 {
 256         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
 257         image_viewer_load_image(imageviewer);
 258 }
 259
 260 static gboolean image_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
 261                                       ImageViewer *imageviewer)
 262 {
 263         if (event->button == 1 && imageviewer->image) {
 264                 imageviewer->resize_img = !imageviewer->resize_img;
 265                 image_viewer_load_image(imageviewer);
 266                 return TRUE;
 267         } else if (event->button == 3 && imageviewer->image) {
 268                 imageviewer->fit_img_height = !imageviewer->fit_img_height;
 269                 image_viewer_load_image(imageviewer);
 270                 return TRUE;
 271         }
 272         return FALSE;
 273 }
 274
 275 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
 276                                   ImageViewer *imageviewer)
 277 {
 278         if (imageviewer->resize_img)
 279                 image_viewer_load_image(imageviewer);
 280 }
 281
 282 static MimeViewer *image_viewer_create(void)
 283 {
 284         ImageViewer *imageviewer;
 285         GtkWidget *notebook;
 286         GtkWidget *table1;
 287         GtkWidget *label3;
 288         GtkWidget *label4;
 289         GtkWidget *filename;
 290         GtkWidget *filesize;
 291         GtkWidget *load_button;
 292         GtkWidget *label5;
 293         GtkWidget *content_type;
 294         GtkWidget *scrolledwin;
 295         GtkWidget *eventbox;
 296         GtkWidget *image;
 297         GtkWidget *error_lbl;
 298         GtkWidget *error_msg;
 299
 300         notebook = gtk_notebook_new();
 301         gtk_widget_set_name(GTK_WIDGET(notebook), "image_viewer");
 302         gtk_widget_show(notebook);
 303         gtk_widget_set_can_focus(notebook, FALSE);
 304         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
 305         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
 306
 307         table1 = gtk_grid_new();
 308         gtk_widget_show(table1);
 309         gtk_container_add(GTK_CONTAINER(notebook), table1);
 310         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
 311         gtk_grid_set_row_spacing(GTK_GRID(table1), 4);
 312         gtk_grid_set_column_spacing(GTK_GRID(table1), 4);
 313
 314         label3 = gtk_label_new(_("Filename:"));
 315         gtk_widget_show(label3);
 316         gtk_label_set_xalign(GTK_LABEL(label3), 0.0);
 317         gtk_grid_attach(GTK_GRID(table1), label3, 0, 0, 2, 1);
 318
 319         label4 = gtk_label_new(_("Filesize:"));
 320         gtk_widget_show(label4);
 321         gtk_label_set_xalign(GTK_LABEL(label4), 0.0);
 322         gtk_grid_attach(GTK_GRID(table1), label4, 0, 1, 1, 1);
 323
 324         filename = gtk_label_new("");
 325         gtk_widget_show(filename);
 326         gtk_label_set_xalign(GTK_LABEL(filename), 0.0);
 327         gtk_grid_attach(GTK_GRID(table1), filename, 1, 0, 2, 1);
 328         gtk_widget_set_hexpand(filename, TRUE);
 329         gtk_widget_set_halign(filename, GTK_ALIGN_FILL);
 330
 331         filesize = gtk_label_new("");
 332         gtk_widget_show(filesize);
 333         gtk_label_set_xalign(GTK_LABEL(filesize), 0.0);
 334         gtk_grid_attach(GTK_GRID(table1), filesize, 1, 1, 1, 1);
 335         gtk_widget_set_hexpand(filesize, TRUE);
 336         gtk_widget_set_halign(filesize, GTK_ALIGN_FILL);
 337
 338         label5 = gtk_label_new(_("Content-Type:"));
 339         gtk_widget_show(label5);
 340         gtk_label_set_xalign(GTK_LABEL(label5), 0.0);
 341         gtk_grid_attach(GTK_GRID(table1), label5, 0, 2, 2, 1);
 342
 343         content_type = gtk_label_new("");
 344         gtk_widget_show(content_type);
 345         gtk_label_set_xalign(GTK_LABEL(content_type), 0.0);
 346         gtk_grid_attach(GTK_GRID(table1), content_type, 1, 2, 1, 1);
 347         gtk_widget_set_hexpand(content_type, TRUE);
 348         gtk_widget_set_halign(content_type, GTK_ALIGN_FILL);
 349
 350         error_lbl = gtk_label_new("");
 351         gtk_widget_show(error_lbl);
 352         gtk_label_set_xalign(GTK_LABEL(error_lbl), 0.0);
 353         gtk_grid_attach(GTK_GRID(table1), error_lbl, 0, 3, 2, 1);
 354         gtk_widget_set_hexpand(error_lbl, TRUE);
 355         gtk_widget_set_halign(error_lbl, GTK_ALIGN_FILL);
 356
 357         error_msg = gtk_label_new("");
 358         gtk_widget_show(error_msg);
 359         gtk_label_set_xalign(GTK_LABEL(error_msg), 0.0);
 360         gtk_grid_attach(GTK_GRID(table1), error_msg, 1, 3, 1, 1);
 361         gtk_widget_set_hexpand(error_msg, TRUE);
 362         gtk_widget_set_halign(error_msg, GTK_ALIGN_FILL);
 363
 364         load_button = gtk_button_new_with_label(_("Load Image"));
 365         gtk_widget_show(load_button);
 366         gtk_widget_set_size_request(GTK_WIDGET(load_button), 6, -1);
 367         gtk_grid_attach(GTK_GRID(table1), load_button, 0, 4, 1, 1);
 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         gtk_scrolled_window_set_propagate_natural_height(GTK_SCROLLED_WINDOW(scrolledwin), TRUE);
 376
 377         eventbox = gtk_event_box_new();
 378         gtk_widget_show(eventbox);
 379         gtk_container_add(GTK_CONTAINER(scrolledwin), eventbox);
 380
 381         image = gtk_image_new();
 382         gtk_container_add( GTK_CONTAINER(eventbox), image);
 383
 384         debug_print("Creating image view...\n");
 385         imageviewer = g_new0(ImageViewer, 1);
 386         imageviewer->mimeviewer.factory = &image_viewer_factory;
 387
 388         imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
 389         imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
 390         imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
 391         imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
 392         imageviewer->mimeviewer.get_selection = NULL;
 393
 394         imageviewer->resize_img   = prefs_common.resize_img;
 395         imageviewer->fit_img_height   = prefs_common.fit_img_height;
 396
 397         imageviewer->scrolledwin  = scrolledwin;
 398         imageviewer->image        = image;
 399         imageviewer->notebook     = notebook;
 400         imageviewer->filename     = filename;
 401         imageviewer->filesize     = filesize;
 402         imageviewer->content_type = content_type;
 403         imageviewer->error_msg    = error_msg;
 404         imageviewer->error_lbl    = error_lbl;
 405         imageviewer->load_button = load_button;
 406
 407         g_object_ref(notebook);
 408
 409         g_signal_connect(G_OBJECT(load_button), "clicked",
 410                          G_CALLBACK(load_cb), imageviewer);
 411         g_signal_connect(G_OBJECT(eventbox), "button-press-event",
 412                          G_CALLBACK(image_button_cb), imageviewer);
 413         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
 414                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
 415
 416         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
 417
 418         return (MimeViewer *) imageviewer;
 419 }
 420
 421 static gchar *content_types[] =
 422         {"image/*", NULL};
 423
 424 MimeViewerFactory image_viewer_factory =
 425 {
 426         content_types,
 427         0,
 428
 429         image_viewer_create,
 430 };
 431
 432 void image_viewer_init(void)
 433 {
 434         mimeview_register_viewer_factory(&image_viewer_factory);
 435 }
 436
 437 void image_viewer_done(void)
 438 {
 439         mimeview_unregister_viewer_factory(&image_viewer_factory);
 440 }