1 /*
2 * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2020 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
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 gboolean fit_img_height;
52
53 GtkWidget *scrolledwin;
54 GtkWidget *image;
55 GtkWidget *notebook;
56 GtkWidget *filename;
57 GtkWidget *filesize;
58 GtkWidget *error_lbl;
59 GtkWidget *error_msg;
60 GtkWidget *content_type;
61 GtkWidget *load_button;
62 };
63
image_viewer_get_widget(MimeViewer * _mimeviewer)64 static GtkWidget *image_viewer_get_widget(MimeViewer *_mimeviewer)
65 {
66 ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
67
68 debug_print("image_viewer_get_widget\n");
69
70 return imageviewer->notebook;
71 }
72
image_viewer_load_image(ImageViewer * imageviewer)73 static void image_viewer_load_image(ImageViewer *imageviewer)
74 {
75 GtkAllocation allocation;
76 GdkPixbufAnimation *animation = NULL;
77 GdkPixbuf *pixbuf = NULL;
78 GError *error = NULL;
79 GInputStream *stream;
80
81 cm_return_if_fail(imageviewer != NULL);
82
83 if (imageviewer->mimeinfo == NULL)
84 return;
85
86 stream = procmime_get_part_as_inputstream(imageviewer->mimeinfo);
87 if (stream == NULL) {
88 g_warning("Couldn't get image MIME part");
89 return;
90 }
91
92 #if GDK_PIXBUF_MINOR >= 28
93 animation = gdk_pixbuf_animation_new_from_stream(stream, NULL, &error);
94 #else
95 pixbuf = gdk_pixbuf_new_from_stream(stream, NULL, &error);
96 #endif
97 g_object_unref(stream);
98
99 if (error != NULL) {
100 g_warning("Couldn't load image: %s\n", error->message);
101 g_error_free(error);
102 return;
103 }
104
105 #if GDK_PIXBUF_MINOR >= 28
106 if (gdk_pixbuf_animation_is_static_image(animation)
107 || imageviewer->resize_img || imageviewer->fit_img_height) {
108 pixbuf = gdk_pixbuf_animation_get_static_image(animation);
109 g_object_ref(pixbuf);
110 g_object_unref(animation);
111 animation = NULL;
112 #else
113 if (imageviewer->resize_img || imageviewer->fit_img_height) {
114 #endif
115
116 if (imageviewer->resize_img) {
117 gtk_widget_get_allocation(imageviewer->scrolledwin, &allocation);
118 pixbuf = claws_load_pixbuf_fitting(pixbuf, FALSE,
119 imageviewer->fit_img_height,
120 allocation.width,
121 allocation.height);
122 }
123 else
124 pixbuf = claws_load_pixbuf_fitting(pixbuf, FALSE, imageviewer->fit_img_height, -1, -1);
125 }
126
127 if (error && !pixbuf && !animation) {
128 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), _("Error:"));
129 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), error->message);
130 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
131 gtk_widget_hide(imageviewer->load_button);
132 g_error_free(error);
133 }
134 if (!pixbuf && !animation) {
135 g_warning("Can't load the image.");
136 return;
137 }
138
139 if (animation)
140 gtk_image_set_from_animation(GTK_IMAGE(imageviewer->image), animation);
141 else
142 gtk_image_set_from_pixbuf(GTK_IMAGE(imageviewer->image), pixbuf);
143
144 g_signal_handlers_block_by_func(G_OBJECT(imageviewer->scrolledwin),
145 G_CALLBACK(scrolledwin_resize_cb), imageviewer);
146
147
148 gtk_widget_show(imageviewer->image);
149 GTK_EVENTS_FLUSH();
150 g_signal_handlers_unblock_by_func(G_OBJECT(imageviewer->scrolledwin),
151 G_CALLBACK(scrolledwin_resize_cb), imageviewer);
152
153 if (pixbuf)
154 g_object_unref(pixbuf);
155 if (animation)
156 g_object_unref(animation);
157 }
158
159 static void image_viewer_set_notebook_page(MimeViewer *_mimeviewer)
160 {
161 ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
162
163 if (!prefs_common.display_img)
164 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 0);
165 else
166 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
167 }
168
169 static void image_viewer_show_mimepart(MimeViewer *_mimeviewer, const gchar *file, MimeInfo *mimeinfo)
170 {
171 ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
172
173 debug_print("image_viewer_show_mimepart\n");
174
175 image_viewer_clear_viewer(_mimeviewer);
176 g_free(imageviewer->file);
177 imageviewer->file = g_strdup(file);
178 imageviewer->mimeinfo = mimeinfo;
179
180 gtk_label_set_text(GTK_LABEL(imageviewer->filename),
181 (procmime_mimeinfo_get_parameter(mimeinfo, "name") != NULL)?
182 procmime_mimeinfo_get_parameter(mimeinfo, "name") :
183 procmime_mimeinfo_get_parameter(mimeinfo, "filename"));
184 gtk_label_set_text(GTK_LABEL(imageviewer->filesize), to_human_readable((goffset)mimeinfo->length));
185 gtk_label_set_text(GTK_LABEL(imageviewer->content_type), mimeinfo->subtype);
186 gtk_label_set_text(GTK_LABEL(imageviewer->error_lbl), "");
187 gtk_label_set_text(GTK_LABEL(imageviewer->error_msg), "");
188
189 if (prefs_common.display_img)
190 image_viewer_load_image(imageviewer);
191 }
192
193 static void image_viewer_clear_viewer(MimeViewer *_mimeviewer)
194 {
195 ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
196 GtkAdjustment *hadj, *vadj;
197
198 debug_print("image_viewer_clear_viewer\n");
199
200 image_viewer_set_notebook_page(_mimeviewer);
201
202 if (imageviewer->scrolledwin) {
203 hadj = gtk_scrolled_window_get_hadjustment
204 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
205 if (hadj) {
206 gtk_adjustment_set_value(hadj, 0.0);
207 gtk_adjustment_changed(hadj);
208 }
209 vadj = gtk_scrolled_window_get_vadjustment
210 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin));
211 if (vadj) {
212 gtk_adjustment_set_value(vadj, 0.0);
213 gtk_adjustment_changed(vadj);
214 }
215 }
216 g_free(imageviewer->file);
217 imageviewer->file = NULL;
218 imageviewer->mimeinfo = NULL;
219 imageviewer->resize_img = prefs_common.resize_img;
220 imageviewer->fit_img_height = prefs_common.fit_img_height;
221 }
222
223 static void image_viewer_destroy_viewer(MimeViewer *_mimeviewer)
224 {
225 ImageViewer *imageviewer = (ImageViewer *) _mimeviewer;
226
227 debug_print("image_viewer_destroy_viewer\n");
228
229 image_viewer_clear_viewer(_mimeviewer);
230 g_object_unref(imageviewer->notebook);
231 g_free(imageviewer);
232 }
233
234 void image_viewer_get_resized_size(gint w, gint h, gint aw, gint ah,
235 gint *sw, gint *sh)
236 {
237 gfloat wratio = 1.0;
238 gfloat hratio = 1.0;
239 gfloat ratio = 1.0;
240
241 if (w > aw)
242 wratio = (gfloat)aw / (gfloat)w;
243 if (h > ah)
244 hratio = (gfloat)ah / (gfloat)h;
245
246 ratio = (wratio > hratio) ? hratio : wratio;
247
248 *sw = (gint)(w * ratio);
249 *sh = (gint)(h * ratio);
250
251 /* be paranoid */
252 if (*sw <= 0 || *sh <= 0) {
253 *sw = w;
254 *sh = h;
255 }
256 }
257
258 static void load_cb(GtkButton *button, ImageViewer *imageviewer)
259 {
260 gtk_notebook_set_current_page(GTK_NOTEBOOK(imageviewer->notebook), 1);
261 image_viewer_load_image(imageviewer);
262 }
263
264 static gboolean scrolledwin_button_cb(GtkWidget *scrolledwin, GdkEventButton *event,
265 ImageViewer *imageviewer)
266 {
267 if (event->button == 1 && imageviewer->image) {
268 imageviewer->resize_img = !imageviewer->resize_img;
269 image_viewer_load_image(imageviewer);
270 return TRUE;
271 } else if (event->button == 3 && imageviewer->image) {
272 imageviewer->fit_img_height = !imageviewer->fit_img_height;
273 image_viewer_load_image(imageviewer);
274 return TRUE;
275 }
276 return FALSE;
277 }
278
279 static void scrolledwin_resize_cb(GtkWidget *scrolledwin, GtkAllocation *alloc,
280 ImageViewer *imageviewer)
281 {
282 if (imageviewer->resize_img)
283 image_viewer_load_image(imageviewer);
284 }
285
286 static MimeViewer *image_viewer_create(void)
287 {
288 ImageViewer *imageviewer;
289 /*
290 * glade generated code (do not touch)
291 */
292 GtkWidget *notebook;
293 GtkWidget *table1;
294 GtkWidget *label3;
295 GtkWidget *label4;
296 GtkWidget *filename;
297 GtkWidget *filesize;
298 GtkWidget *load_button;
299 GtkWidget *label5;
300 GtkWidget *content_type;
301 GtkWidget *scrolledwin;
302 GtkWidget *error_lbl;
303 GtkWidget *error_msg;
304
305 notebook = gtk_notebook_new();
306 gtk_widget_show(notebook);
307 gtk_widget_set_can_focus(notebook, FALSE);
308 gtk_notebook_set_show_tabs(GTK_NOTEBOOK(notebook), FALSE);
309 gtk_notebook_set_show_border(GTK_NOTEBOOK(notebook), FALSE);
310
311 table1 = gtk_table_new(5, 3, FALSE);
312 gtk_widget_show(table1);
313 gtk_container_add(GTK_CONTAINER(notebook), table1);
314 gtk_container_set_border_width(GTK_CONTAINER(table1), 8);
315 gtk_table_set_row_spacings(GTK_TABLE(table1), 4);
316 gtk_table_set_col_spacings(GTK_TABLE(table1), 4);
317
318 label3 = gtk_label_new(_("Filename:"));
319 gtk_widget_show(label3);
320 gtk_table_attach(GTK_TABLE(table1), label3, 0, 1, 0, 1,
321 (GtkAttachOptions) (GTK_FILL),
322 (GtkAttachOptions) (0), 0, 0);
323 gtk_misc_set_alignment(GTK_MISC(label3), 0, 0.5);
324
325 label4 = gtk_label_new(_("Filesize:"));
326 gtk_widget_show(label4);
327 gtk_table_attach(GTK_TABLE(table1), label4, 0, 1, 1, 2,
328 (GtkAttachOptions) (GTK_FILL),
329 (GtkAttachOptions) (0), 0, 0);
330 gtk_misc_set_alignment(GTK_MISC(label4), 0, 0.5);
331
332 filename = gtk_label_new("");
333 gtk_widget_show(filename);
334 gtk_table_attach(GTK_TABLE(table1), filename, 1, 3, 0, 1,
335 (GtkAttachOptions) (GTK_FILL),
336 (GtkAttachOptions) (0), 0, 0);
337 gtk_misc_set_alignment(GTK_MISC(filename), 0, 0.5);
338
339 filesize = gtk_label_new("");
340 gtk_widget_show(filesize);
341 gtk_table_attach(GTK_TABLE(table1), filesize, 1, 3, 1, 2,
342 (GtkAttachOptions) (GTK_FILL),
343 (GtkAttachOptions) (0), 0, 0);
344 gtk_misc_set_alignment(GTK_MISC(filesize), 0, 0.5);
345
346 label5 = gtk_label_new(_("Content-Type:"));
347 gtk_widget_show(label5);
348 gtk_table_attach(GTK_TABLE(table1), label5, 0, 1, 2, 3,
349 (GtkAttachOptions) (GTK_FILL),
350 (GtkAttachOptions) (0), 0, 0);
351 gtk_misc_set_alignment(GTK_MISC(label5), 0, 0.5);
352
353 content_type = gtk_label_new("");
354 gtk_widget_show(content_type);
355 gtk_table_attach(GTK_TABLE(table1), content_type, 1, 3, 2, 3,
356 (GtkAttachOptions) (GTK_FILL),
357 (GtkAttachOptions) (0), 0, 0);
358 gtk_misc_set_alignment(GTK_MISC(content_type), 0, 0.5);
359
360 error_lbl = gtk_label_new("");
361 gtk_widget_show(error_lbl);
362 gtk_table_attach(GTK_TABLE(table1), error_lbl, 0, 1, 3, 4,
363 (GtkAttachOptions) (GTK_FILL),
364 (GtkAttachOptions) (0), 0, 0);
365 gtk_misc_set_alignment(GTK_MISC(error_lbl), 0, 0.5);
366
367 error_msg = gtk_label_new("");
368 gtk_widget_show(error_msg);
369 gtk_table_attach(GTK_TABLE(table1), error_msg, 1, 3, 3, 4,
370 (GtkAttachOptions) (GTK_FILL),
371 (GtkAttachOptions) (0), 0, 0);
372 gtk_misc_set_alignment(GTK_MISC(error_msg), 0, 0.5);
373
374 load_button = gtk_button_new_with_label(_("Load Image"));
375 gtk_widget_show(load_button);
376 gtk_table_attach(GTK_TABLE(table1), load_button, 0, 1, 4, 5,
377 (GtkAttachOptions) (GTK_FILL),
378 (GtkAttachOptions) (0), 0, 0);
379
380 scrolledwin = gtk_scrolled_window_new(NULL, NULL);
381 gtk_widget_show(scrolledwin);
382 gtk_container_add(GTK_CONTAINER(notebook), scrolledwin);
383 gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
384 GTK_POLICY_AUTOMATIC,
385 GTK_POLICY_AUTOMATIC);
386 /*
387 * end of glade code
388 */
389
390 debug_print("Creating image view...\n");
391 imageviewer = g_new0(ImageViewer, 1);
392 imageviewer->mimeviewer.factory = &image_viewer_factory;
393
394 imageviewer->mimeviewer.get_widget = image_viewer_get_widget;
395 imageviewer->mimeviewer.show_mimepart = image_viewer_show_mimepart;
396 imageviewer->mimeviewer.clear_viewer = image_viewer_clear_viewer;
397 imageviewer->mimeviewer.destroy_viewer = image_viewer_destroy_viewer;
398 imageviewer->mimeviewer.get_selection = NULL;
399
400 imageviewer->resize_img = prefs_common.resize_img;
401 imageviewer->fit_img_height = prefs_common.fit_img_height;
402
403 imageviewer->scrolledwin = scrolledwin;
404 imageviewer->image = gtk_image_new();
405 gtk_scrolled_window_add_with_viewport
406 (GTK_SCROLLED_WINDOW(imageviewer->scrolledwin),
407 imageviewer->image);
408 imageviewer->notebook = notebook;
409 imageviewer->filename = filename;
410 imageviewer->filesize = filesize;
411 imageviewer->content_type = content_type;
412 imageviewer->error_msg = error_msg;
413 imageviewer->error_lbl = error_lbl;
414 imageviewer->load_button = load_button;
415
416 g_object_ref(notebook);
417
418 g_signal_connect(G_OBJECT(load_button), "clicked",
419 G_CALLBACK(load_cb), imageviewer);
420 g_signal_connect(G_OBJECT(scrolledwin), "button-press-event",
421 G_CALLBACK(scrolledwin_button_cb), imageviewer);
422 g_signal_connect(G_OBJECT(scrolledwin), "size-allocate",
423 G_CALLBACK(scrolledwin_resize_cb), imageviewer);
424
425 image_viewer_set_notebook_page((MimeViewer *)imageviewer);
426
427 return (MimeViewer *) imageviewer;
428 }
429
430 static gchar *content_types[] =
431 {"image/*", NULL};
432
433 MimeViewerFactory image_viewer_factory =
434 {
435 content_types,
436 0,
437
438 image_viewer_create,
439 };
440
441 void image_viewer_init(void)
442 {
443 mimeview_register_viewer_factory(&image_viewer_factory);
444 }
445
446 void image_viewer_done(void)
447 {
448 mimeview_unregister_viewer_factory(&image_viewer_factory);
449 }
450