6a0ce40f4954cb98b51bee711c6e927eb1d75773
[claws.git] / src / image_viewer.c
1 /*
2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail 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 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
20 #ifdef HAVE_CONFIG_H
21 #  include "config.h"
22 #include "claws-features.h"
23 #endif
24
25 #include <glib.h>
26 #include <glib/gi18n.h>
27 #include <gtk/gtk.h>
28
29 #include "procmime.h"
30 #include "file-utils.h"
31 #include "utils.h"
32 #include "mimeview.h"
33
34 #include "prefs_common.h"
35
36 typedef struct _ImageViewer ImageViewer;
37
38 MimeViewerFactory image_viewer_factory;
39 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
40                                           gint * sw, gint * sh);
41 static void image_viewer_clear_viewer(MimeViewer *imageviewer);
42 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
43                                   ImageViewer *imageviewer);
44 struct _ImageViewer
45 {
46         MimeViewer mimeviewer;
47
48         gchar     *file;
49         MimeInfo  *mimeinfo;
50         gboolean   resize_img;
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 != NULL) {
99                 g_warning("Couldn't load image: %s\n", error->message);
100                 g_error_free(error);
101                 return;
102         }
103
104 #if GDK_PIXBUF_MINOR >= 28
105         if (gdk_pixbuf_animation_is_static_image(animation)
106             || imageviewer->resize_img) {
107                 pixbuf = gdk_pixbuf_animation_get_static_image(animation);
108                 g_object_ref(pixbuf);
109                 g_object_unref(animation);
110                 animation = NULL;
111 #else
112         if (imageviewer->resize_img) {
113 #endif
114
115                 if (imageviewer->resize_img) {
116                         gtk_widget_get_allocation(
117                                 gtk_widget_get_parent(imageviewer->notebook), &allocation);
118                         pixbuf = claws_load_pixbuf_fitting(pixbuf,
119                                 allocation.width,
120                                 allocation.height);
121                 }
122                 else
123                         pixbuf = claws_load_pixbuf_fitting(pixbuf, -1, -1);
124         }
125
126         if (error && !pixbuf && !animation) {
127                 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
128                 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
129                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
130                 gtk_widget_hide(imageviewer->load_button);
131                 g_error_free(error);
132         }
133         if (!pixbuf && !animation) {
134                 g_warning("Can't load the image.");     
135                 return;
136         }
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         g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin), 
144                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
145
146
147         gtk_widget_show(imageviewer->image);
148         GTK_EVENTS_FLUSH();
149         g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin), 
150                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
151
152         if (pixbuf)
153                 g_object_unref(pixbuf);
154         if (animation)
155                 g_object_unref(animation);
156 }
157
158 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
159 {
160         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
161
162         if (!prefs_common.display_img)
163                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
164         else
165                 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
166 }
167
168 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
169 {
170         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
171
172         debug_print("image_viewer_show_mimepart\n");
173
174         image_viewer_clear_viewer(_mimeviewer);
175         g_free(imageviewer->file);
176         imageviewer->file = g_strdup(file);
177         imageviewer->mimeinfo = mimeinfo;
178
179         gtk_label_set_text(GTK_LABEL(imageviewer->filename),
180                            (procmime_mimeinfo_get_parameter(mimeinfo, "name") != NULL)?
181                            procmime_mimeinfo_get_parameter(mimeinfo, "name") :
182                            procmime_mimeinfo_get_parameter(mimeinfo, "filename"));
183         gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
184         gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
185         gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
186         gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
187
188         if (prefs_common.display_img)
189                 image_viewer_load_image(imageviewer);
190 }
191
192 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
193 {
194         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
195         GtkAdjustment *hadj, *vadj;
196
197         debug_print("image_viewer_clear_viewer\n");
198
199         image_viewer_set_notebook_page(_mimeviewer);
200
201         if (imageviewer->scrolledwin) {
202                 hadj = gtk_scrolled_window_get_hadjustment
203                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
204                 if (hadj) {
205                         gtk_adjustment_set_value(hadj, 0.0);
206                         gtk_adjustment_changed(hadj);
207                 }
208                 vadj = gtk_scrolled_window_get_vadjustment
209                         (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
210                 if (vadj) {
211                         gtk_adjustment_set_value(vadj, 0.0);
212                         gtk_adjustment_changed(vadj);
213                 }
214         }
215         g_free(imageviewer->file);
216         imageviewer->file = NULL;
217         imageviewer->mimeinfo = NULL;
218         imageviewer->resize_img = prefs_common.resize_img;
219 }
220
221 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
222 {
223         ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
224
225         debug_print("image_viewer_destroy_viewer\n");
226
227         image_viewer_clear_viewer(_mimeviewer);
228         g_object_unref(imageviewer->notebook);
229         g_free(imageviewer);
230 }
231
232 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
233                              gint *sw, gint *sh)
234 {
235         gfloat wratio = 1.0;
236         gfloat hratio = 1.0;
237         gfloat ratio  = 1.0;
238
239         if (w > aw)
240                 wratio = (gfloat)aw / (gfloat)w;
241         if (h > ah)
242                 hratio = (gfloat)ah / (gfloat)h;
243
244         ratio = (wratio > hratio) ? hratio : wratio;
245
246         *sw = (gint)(w * ratio);
247         *sh = (gint)(h * ratio);
248
249         /* be paranoid */
250         if (*sw <= 0 || *sh <= 0) {
251                 *sw = w;
252                 *sh = h;
253         }
254 }
255
256 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
257 {
258         gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
259         image_viewer_load_image(imageviewer);
260 }
261
262 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
263                                       ImageViewer *imageviewer)
264 {
265         if (event->button == 1 && imageviewer->image) {
266                 imageviewer->resize_img = !imageviewer->resize_img;
267                 image_viewer_load_image(imageviewer);
268                 return TRUE;
269         }
270         return FALSE;
271 }
272
273 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
274                                   ImageViewer *imageviewer)
275 {
276         if (imageviewer->resize_img)
277                 image_viewer_load_image(imageviewer);
278 }
279
280 static MimeViewer *image_viewer_create(void)
281 {
282         ImageViewer *imageviewer;
283         /*
284          *  glade generated code (do not touch)
285          */
286         GtkWidget *notebook;
287         GtkWidget *table1;
288         GtkWidget *label3;
289         GtkWidget *label4;
290         GtkWidget *filename;
291         GtkWidget *filesize;
292         GtkWidget *load_button;
293         GtkWidget *label5;
294         GtkWidget *content_type;
295         GtkWidget *scrolledwin;
296         GtkWidget *error_lbl;
297         GtkWidget *error_msg;
298
299         notebook = gtk_notebook_new();
300         gtk_widget_show(notebook);
301         gtk_widget_set_can_focus(notebook, FALSE);
302         gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
303         gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
304
305         table1 = gtk_table_new(5, 3, FALSE);
306         gtk_widget_show(table1);
307         gtk_container_add(GTK_CONTAINER(notebook), table1);
308         gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
309         gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
310         gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
311
312         label3 = gtk_label_new(_("Filename:"));
313         gtk_widget_show(label3);
314         gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
315                          (GtkAttachOptions) (GTK_FILL),
316                          (GtkAttachOptions) (0), 0, 0);
317         gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
318
319         label4 = gtk_label_new(_("Filesize:"));
320         gtk_widget_show(label4);
321         gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
322                          (GtkAttachOptions) (GTK_FILL),
323                          (GtkAttachOptions) (0), 0, 0);
324         gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
325
326         filename = gtk_label_new("");
327         gtk_widget_show(filename);
328         gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
329                          (GtkAttachOptions) (GTK_FILL),
330                          (GtkAttachOptions) (0), 0, 0);
331         gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
332
333         filesize = gtk_label_new("");
334         gtk_widget_show(filesize);
335         gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
336                          (GtkAttachOptions) (GTK_FILL),
337                          (GtkAttachOptions) (0), 0, 0);
338         gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
339
340         label5 = gtk_label_new(_("Content-Type:"));
341         gtk_widget_show(label5);
342         gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
343                          (GtkAttachOptions) (GTK_FILL),
344                          (GtkAttachOptions) (0), 0, 0);
345         gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
346
347         content_type = gtk_label_new("");
348         gtk_widget_show(content_type);
349         gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
350                          (GtkAttachOptions) (GTK_FILL),
351                          (GtkAttachOptions) (0), 0, 0);
352         gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
353
354         error_lbl = gtk_label_new("");
355         gtk_widget_show(error_lbl);
356         gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
357                          (GtkAttachOptions) (GTK_FILL),
358                          (GtkAttachOptions) (0), 0, 0);
359         gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
360
361         error_msg = gtk_label_new("");
362         gtk_widget_show(error_msg);
363         gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
364                          (GtkAttachOptions) (GTK_FILL),
365                          (GtkAttachOptions) (0), 0, 0);
366         gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
367
368         load_button = gtk_button_new_with_label(_("Load Image"));
369         gtk_widget_show(load_button);
370         gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
371                          (GtkAttachOptions) (GTK_FILL),
372                          (GtkAttachOptions) (0), 0, 0);
373
374         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
375         gtk_widget_show(scrolledwin);
376         gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
377         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
378                                        GTK_POLICY_AUTOMATIC,
379                                        GTK_POLICY_AUTOMATIC);
380         /*
381          *  end of glade code
382          */
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
396         imageviewer->scrolledwin  = scrolledwin;
397         imageviewer->image = gtk_image_new();
398         gtk_scrolled_window_add_with_viewport
399                 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
400                  imageviewer->image);
401         imageviewer->notebook     = notebook;
402         imageviewer->filename     = filename;
403         imageviewer->filesize     = filesize;
404         imageviewer->content_type = content_type;
405         imageviewer->error_msg    = error_msg;
406         imageviewer->error_lbl    = error_lbl;
407         imageviewer->load_button = load_button;
408
409         g_object_ref(notebook);
410
411         g_signal_connect(G_OBJECT(load_button), "clicked",
412                          G_CALLBACK(load_cb), imageviewer);
413         g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
414                          G_CALLBACK(scrolledwin_button_cb), imageviewer);
415         g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
416                          G_CALLBACK(scrolledwin_resize_cb), imageviewer);
417
418         image_viewer_set_notebook_page((MimeViewer *)imageviewer);
419
420         return (MimeViewer *) imageviewer;
421 }
422
423 static gchar *content_types[] =
424         {"image/*", NULL};
425
426 MimeViewerFactory image_viewer_factory =
427 {
428         content_types,
429         0,
430         
431         image_viewer_create,
432 };
433
434 void image_viewer_init(void)
435 {
436         mimeview_register_viewer_factory(&image_viewer_factory);
437 }
438
439 void image_viewer_done(void)
440 {
441         mimeview_unregister_viewer_factory(&image_viewer_factory);
442 }