git.maemo.org Git - modest/blob - src/widgets/modest-gtkhtml-mime-part-view.c

   1 /* Copyright (c) 2006, 2007, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <config.h>
  31 #include <widgets/modest-gtkhtml-mime-part-view.h>
  32 #include <string.h>
  33 #include <gtkhtml/gtkhtml-stream.h>
  34 #include <gtkhtml/gtkhtml-search.h>
  35 #include <tny-stream.h>
  36 #include <tny-mime-part-view.h>
  37 #include "modest-tny-mime-part.h"
  38 #include <modest-stream-text-to-html.h>
  39 #include <modest-text-utils.h>
  40 #include <modest-conf.h>
  41 #include <modest-runtime.h>
  42 #include <widgets/modest-mime-part-view.h>
  43 #include <widgets/modest-zoomable.h>
  44 #include <widgets/modest-tny-stream-gtkhtml.h>
  45 #include <libgnomevfs/gnome-vfs.h>
  46 #include <gdk/gdkkeysyms.h>
  47 #include <modest-ui-constants.h>
  48
  49 /* gobject structure methods */
  50 static void    modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass);
  51 static void    tny_mime_part_view_init                  (gpointer g, gpointer iface_data);
  52 static void    modest_mime_part_view_init               (gpointer g, gpointer iface_data);
  53 static void    modest_zoomable_init                     (gpointer g, gpointer iface_data);
  54 static void    modest_isearch_view_init                 (gpointer g, gpointer iface_data);
  55 static void    modest_gtkhtml_mime_part_view_init       (ModestGtkhtmlMimePartView *self);
  56 static void    modest_gtkhtml_mime_part_view_finalize   (GObject *self);
  57 static void    modest_gtkhtml_mime_part_view_dispose    (GObject *self);
  58
  59 /* GtkHTML signal handlers */
  60 static gboolean  on_link_clicked  (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  61 static gboolean  on_url           (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  62 static gboolean  on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
  63                                    ModestGtkhtmlMimePartView *self);
  64 static void      on_notify_style  (GObject *obj, GParamSpec *spec, gpointer userdata);
  65 static gboolean  update_style     (ModestGtkhtmlMimePartView *self);
  66 /* TnyMimePartView implementation */
  67 static void modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self);
  68 static void modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self);
  69 static void modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self, TnyMimePart *part);
  70 static void modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self, TnyMimePart *part);
  71 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self);
  72 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self);
  73 /* ModestMimePartView implementation */
  74 static gboolean modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self);
  75 static gboolean modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self);
  76 static gboolean modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self);
  77 static gboolean modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self);
  78 static void     modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images);
  79 static void     modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images);
  80 static gboolean modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self);
  81 static gboolean modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self);
  82 /* ModestZoomable implementation */
  83 static gdouble modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self);
  84 static void modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value);
  85 static gboolean modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self);
  86 static gboolean modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self);
  87 static gdouble modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self);
  88 static void modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value);
  89 static gboolean modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self);
  90 static gboolean modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self);
  91 /* ModestISearchView implementation */
  92 static gboolean modest_gtkhtml_mime_part_view_search                    (ModestISearchView *self, const gchar *string);
  93 static gboolean modest_gtkhtml_mime_part_view_search_next               (ModestISearchView *self);
  94 static gboolean modest_gtkhtml_mime_part_view_get_selection_area        (ModestISearchView *self, gint *x, gint *y,
  95                                                                          gint *width, gint *height);
  96 static gboolean modest_gtkhtml_mime_part_view_search_default            (ModestISearchView *self, const gchar *string);
  97 static gboolean modest_gtkhtml_mime_part_view_search_next_default       (ModestISearchView *self);
  98 static gboolean modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
  99                                                                           gint *width, gint *height);
 100
 101
 102 /* internal api */
 103 static TnyMimePart  *get_part   (ModestGtkhtmlMimePartView *self);
 104 static void          set_html_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding);
 105 static void          set_text_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 106 static void          set_empty_part  (ModestGtkhtmlMimePartView *self);
 107 static void          set_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 108 static gboolean      is_empty   (ModestGtkhtmlMimePartView *self);
 109 static gboolean      get_view_images   (ModestGtkhtmlMimePartView *self);
 110 static void          set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images);
 111 static gboolean      has_external_images   (ModestGtkhtmlMimePartView *self);
 112 static void          set_zoom   (ModestGtkhtmlMimePartView *self, gdouble zoom);
 113 static gdouble       get_zoom   (ModestGtkhtmlMimePartView *self);
 114 static gboolean      has_contents_receiver (gpointer engine, const gchar *data,
 115                                             size_t len, gboolean *has_contents);
 116 static gboolean      search             (ModestGtkhtmlMimePartView *self, const gchar *string);
 117 static gboolean      search_next        (ModestGtkhtmlMimePartView *self);
 118 static gboolean      get_selection_area (ModestGtkhtmlMimePartView *self, gint *x, gint *y,
 119                                          gint *width, gint *height);
 120
 121 typedef struct _ModestGtkhtmlMimePartViewPrivate ModestGtkhtmlMimePartViewPrivate;
 122 struct _ModestGtkhtmlMimePartViewPrivate {
 123         TnyMimePart *part;
 124         gdouble current_zoom;
 125         gboolean view_images;
 126         gboolean has_external_images;
 127         GSList *sighandlers;
 128 };
 129
 130 #define MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
 131                                                                                        MODEST_TYPE_GTKHTML_MIME_PART_VIEW, \
 132                                                                                        ModestGtkhtmlMimePartViewPrivate))
 133
 134 enum {
 135         STOP_STREAMS_SIGNAL,
 136         LAST_SIGNAL
 137 };
 138
 139 static GtkHTMLClass *parent_class = NULL;
 140
 141 static guint signals[LAST_SIGNAL] = {0};
 142
 143 GtkWidget *
 144 modest_gtkhtml_mime_part_view_new ()
 145 {
 146         return g_object_new (MODEST_TYPE_GTKHTML_MIME_PART_VIEW, NULL);
 147 }
 148
 149 /* GOBJECT IMPLEMENTATION */
 150 GType
 151 modest_gtkhtml_mime_part_view_get_type (void)
 152 {
 153         static GType my_type = 0;
 154         if (!my_type) {
 155                 static const GTypeInfo my_info = {
 156                         sizeof(ModestGtkhtmlMimePartViewClass),
 157                         NULL,           /* base init */
 158                         NULL,           /* base finalize */
 159                         (GClassInitFunc) modest_gtkhtml_mime_part_view_class_init,
 160                         NULL,           /* class finalize */
 161                         NULL,           /* class data */
 162                         sizeof(ModestGtkhtmlMimePartView),
 163                         1,              /* n_preallocs */
 164                         (GInstanceInitFunc) modest_gtkhtml_mime_part_view_init,
 165                         NULL
 166                 };
 167
 168                 static const GInterfaceInfo tny_mime_part_view_info =
 169                 {
 170                   (GInterfaceInitFunc) tny_mime_part_view_init, /* interface_init */
 171                   NULL,         /* interface_finalize */
 172                   NULL          /* interface_data */
 173                 };
 174
 175                 static const GInterfaceInfo modest_mime_part_view_info =
 176                 {
 177                   (GInterfaceInitFunc) modest_mime_part_view_init, /* interface_init */
 178                   NULL,         /* interface_finalize */
 179                   NULL          /* interface_data */
 180                 };
 181
 182                 static const GInterfaceInfo modest_zoomable_info =
 183                 {
 184                   (GInterfaceInitFunc) modest_zoomable_init, /* interface_init */
 185                   NULL,         /* interface_finalize */
 186                   NULL          /* interface_data */
 187                 };
 188
 189                 static const GInterfaceInfo modest_isearch_view_info =
 190                 {
 191                   (GInterfaceInitFunc) modest_isearch_view_init, /* interface_init */
 192                   NULL,         /* interface_finalize */
 193                   NULL          /* interface_data */
 194                 };
 195
 196                 my_type = g_type_register_static (GTK_TYPE_HTML,
 197                                                   "ModestGtkhtmlMimePartView",
 198                                                   &my_info, 0);
 199
 200                 g_type_add_interface_static (my_type, TNY_TYPE_MIME_PART_VIEW,
 201                         &tny_mime_part_view_info);
 202
 203                 g_type_add_interface_static (my_type, MODEST_TYPE_MIME_PART_VIEW,
 204                         &modest_mime_part_view_info);
 205
 206                 g_type_add_interface_static (my_type, MODEST_TYPE_ZOOMABLE,
 207                         &modest_zoomable_info);
 208                 g_type_add_interface_static (my_type, MODEST_TYPE_ISEARCH_VIEW,
 209                         &modest_isearch_view_info);
 210         }
 211         return my_type;
 212 }
 213
 214 static void
 215 modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass)
 216 {
 217         GObjectClass *gobject_class;
 218         GtkBindingSet *binding_set;
 219
 220         gobject_class = (GObjectClass*) klass;
 221
 222         parent_class            = g_type_class_peek_parent (klass);
 223         gobject_class->dispose = modest_gtkhtml_mime_part_view_dispose;
 224         gobject_class->finalize = modest_gtkhtml_mime_part_view_finalize;
 225
 226         klass->get_part_func = modest_gtkhtml_mime_part_view_get_part_default;
 227         klass->set_part_func = modest_gtkhtml_mime_part_view_set_part_default;
 228         klass->clear_func = modest_gtkhtml_mime_part_view_clear_default;
 229         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty_default;
 230         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images_default;
 231         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images_default;
 232         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images_default;
 233         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom_default;
 234         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom_default;
 235         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus_default;
 236         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus_default;
 237         klass->search_func = modest_gtkhtml_mime_part_view_search_default;
 238         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next_default;
 239         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area_default;
 240
 241         binding_set = gtk_binding_set_by_class (klass);
 242         gtk_binding_entry_skip (binding_set, GDK_Down, 0);
 243         gtk_binding_entry_skip (binding_set, GDK_Up, 0);
 244         gtk_binding_entry_skip (binding_set, GDK_KP_Up, 0);
 245         gtk_binding_entry_skip (binding_set, GDK_KP_Down, 0);
 246         gtk_binding_entry_skip (binding_set, GDK_Page_Down, 0);
 247         gtk_binding_entry_skip (binding_set, GDK_Page_Up, 0);
 248         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Up, 0);
 249         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Down, 0);
 250         gtk_binding_entry_skip (binding_set, GDK_Home, 0);
 251         gtk_binding_entry_skip (binding_set, GDK_End, 0);
 252         gtk_binding_entry_skip (binding_set, GDK_KP_Home, 0);
 253         gtk_binding_entry_skip (binding_set, GDK_KP_End, 0);
 254
 255         g_type_class_add_private (gobject_class, sizeof(ModestGtkhtmlMimePartViewPrivate));
 256
 257         signals[STOP_STREAMS_SIGNAL] =
 258                 g_signal_new ("stop-streams",
 259                               G_TYPE_FROM_CLASS (gobject_class),
 260                               G_SIGNAL_RUN_FIRST,
 261                               G_STRUCT_OFFSET (ModestGtkhtmlMimePartViewClass,stop_streams),
 262                               NULL, NULL,
 263                               g_cclosure_marshal_VOID__VOID,
 264                               G_TYPE_NONE, 0);
 265
 266 }
 267
 268 static void
 269 modest_gtkhtml_mime_part_view_init (ModestGtkhtmlMimePartView *self)
 270 {
 271         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 272         GdkColor base;
 273         GdkColor text;
 274
 275         gtk_html_set_editable        (GTK_HTML(self), FALSE);
 276         gtk_html_allow_selection     (GTK_HTML(self), TRUE);
 277         gtk_html_set_caret_mode      (GTK_HTML(self), FALSE);
 278         gtk_html_set_blocking        (GTK_HTML(self), TRUE);
 279         gtk_html_set_images_blocking (GTK_HTML(self), TRUE);
 280
 281 #ifdef MODEST_TOOLKIT_HILDON2
 282 #ifdef HAVE_GTK_HTML_SET_MAX_IMAGE_SIZE
 283         /* We set a maximum width of a bit less than the width of the screen, and a
 284            maximum height of 2 times the full size of the window. Should be enough */
 285         gtk_html_set_max_image_size (GTK_HTML (self), 720, 880);
 286 #endif
 287 #ifdef HAVE_GTK_HTML_SET_ALLOW_DND
 288         gtk_html_set_allow_dnd       (GTK_HTML(self), FALSE);
 289 #endif
 290 #endif
 291
 292 #ifdef HAVE_GTK_HTML_SET_DEFAULT_ENGINE
 293         /* Enable Content type handling */
 294         gtk_html_set_default_engine (GTK_HTML (self), TRUE);
 295 #endif
 296
 297         gdk_color_parse ("#fff", &base);
 298         gdk_color_parse ("#000", &text);
 299         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 300         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 301
 302         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 303                                                        G_OBJECT(self), "link_clicked",
 304                                                        G_CALLBACK(on_link_clicked), self);
 305         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 306                                                        G_OBJECT(self), "url_requested",
 307                                                        G_CALLBACK(on_url_requested), self);
 308         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 309                                                        G_OBJECT(self), "on_url",
 310                                                        G_CALLBACK(on_url), self);
 311         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 312                                                        G_OBJECT(self), "notify::style",
 313                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 314
 315         priv->part = NULL;
 316         priv->current_zoom = 1.0;
 317         priv->view_images = FALSE;
 318         priv->has_external_images = FALSE;
 319 }
 320
 321 static void
 322 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 323 {
 324         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 325
 326         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 327         priv->sighandlers = NULL;
 328
 329         G_OBJECT_CLASS (parent_class)->finalize (obj);
 330 }
 331
 332 static void
 333 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 334 {
 335         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 336
 337         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 338
 339         if (priv->part) {
 340                 g_object_unref (priv->part);
 341                 priv->part = NULL;
 342         }
 343
 344         G_OBJECT_CLASS (parent_class)->dispose (obj);
 345 }
 346
 347 /* GTKHTML SIGNALS HANDLERS */
 348
 349 static void
 350 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 351 {
 352         if (strcmp ("style", spec->name) == 0) {
 353                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 354                                  g_object_ref (obj), g_object_unref);
 355                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 356         }
 357 }
 358
 359 gboolean
 360 same_color (GdkColor *a, GdkColor *b)
 361 {
 362         return ((a->red == b->red) &&
 363                 (a->green == b->green) &&
 364                 (a->blue == b->blue));
 365 }
 366
 367 static gboolean
 368 update_style (ModestGtkhtmlMimePartView *self)
 369 {
 370         GdkColor base;
 371         GdkColor text;
 372         GtkRcStyle *rc_style;
 373
 374         gdk_threads_enter ();
 375
 376         if (GTK_WIDGET_VISIBLE (self)) {
 377                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 378
 379                 gdk_color_parse ("#fff", &base);
 380                 gdk_color_parse ("#000", &text);
 381
 382                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 383                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 384
 385                         rc_style->base[GTK_STATE_NORMAL] = base;
 386                         rc_style->text[GTK_STATE_NORMAL] = text;
 387                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 388                 }
 389         }
 390
 391         gdk_threads_leave ();
 392
 393         return FALSE;
 394 }
 395
 396
 397
 398 static gboolean
 399 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 400 {
 401         gboolean result;
 402         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 403
 404         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 405         return result;
 406 }
 407
 408 static gboolean
 409 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 410 {
 411         gboolean result;
 412         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 413
 414         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 415         return result;
 416 }
 417
 418 static gboolean
 419 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 420                   ModestGtkhtmlMimePartView *self)
 421 {
 422         gboolean result;
 423         TnyStream *tny_stream;
 424         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 425
 426         if (g_str_has_prefix (uri, "http:")) {
 427                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 428
 429                 if (!priv->view_images)
 430                         priv->has_external_images = TRUE;
 431         }
 432
 433         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 434         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 435         g_object_unref (tny_stream);
 436         return result;
 437 }
 438
 439 /* INTERNAL API */
 440 static void
 441 decode_to_stream_cb (TnyMimePart *self,
 442                      gboolean cancelled,
 443                      TnyStream *stream,
 444                      GError *err,
 445                      gpointer user_data)
 446 {
 447         gboolean is_text = GPOINTER_TO_INT (user_data);
 448
 449         if (is_text) {
 450                 if (tny_stream_write (stream, "\n", 1) == -1) {
 451                         g_warning ("failed to write CR in %s", __FUNCTION__);
 452                 }
 453                 tny_stream_reset (stream);
 454         }
 455         tny_stream_close (stream);
 456 }
 457
 458 static void
 459 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding)
 460 {
 461         GtkHTMLStream *gtkhtml_stream;
 462         TnyStream *tny_stream;
 463         gchar *content_type;
 464
 465         g_return_if_fail (self);
 466         g_return_if_fail (part);
 467
 468         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 469
 470         content_type = g_strdup_printf ("text/html; charset=%s", encoding);
 471         gtkhtml_stream = gtk_html_begin_full(GTK_HTML(self), NULL, content_type, 0);
 472         g_free (content_type);
 473
 474         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 475         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 476         tny_stream_reset (tny_stream);
 477
 478         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 479                                               tny_stream, decode_to_stream_cb,
 480                                               NULL, GINT_TO_POINTER (FALSE));
 481         g_object_unref (tny_stream);
 482 }
 483
 484 static void
 485 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 486 {
 487         TnyStream* text_to_html_stream, *tny_stream;
 488         GtkHTMLStream *gtkhtml_stream;
 489
 490         g_return_if_fail (self);
 491         g_return_if_fail (part);
 492
 493         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 494
 495         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 496         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 497         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 498         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 499         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 500                                                       64*1024);
 501         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 502                                                    128*1024);
 503         modest_stream_text_to_html_set_line_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 504                                                    1024);
 505
 506         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 507                                               text_to_html_stream, decode_to_stream_cb,
 508                                               NULL, GINT_TO_POINTER (TRUE));
 509
 510         g_object_unref (G_OBJECT(text_to_html_stream));
 511         g_object_unref (G_OBJECT(tny_stream));
 512 }
 513
 514 static void
 515 set_empty_part (ModestGtkhtmlMimePartView *self)
 516 {
 517         g_return_if_fail (self);
 518
 519         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 520         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 521 }
 522
 523 static void
 524 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 525 {
 526         ModestGtkhtmlMimePartViewPrivate *priv;
 527         gchar *header_content_type, *header_content_type_lower;
 528         const gchar *tmp;
 529         gchar *charset = NULL;
 530
 531         g_return_if_fail (self);
 532
 533         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 534         priv->has_external_images = FALSE;
 535
 536         if (part != priv->part) {
 537                 if (priv->part)
 538                         g_object_unref (G_OBJECT(priv->part));
 539                 if (part)
 540                         g_object_ref   (G_OBJECT(part));
 541                 priv->part = part;
 542         }
 543
 544         if (!part) {
 545                 set_empty_part (self);
 546                 return;
 547         }
 548
 549         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 550         if (header_content_type) {
 551                 header_content_type = g_strstrip (header_content_type);
 552                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 553         } else {
 554                 header_content_type_lower = NULL;
 555         }
 556
 557         if (header_content_type_lower) {
 558                 tmp = strstr (header_content_type_lower, "charset=");
 559                 if (tmp) {
 560                         const gchar *tmp2;
 561                         tmp = tmp + strlen ("charset=");
 562
 563                         tmp2 = strstr (tmp, ";");
 564                         if (tmp2) {
 565                                 charset = g_strndup (tmp, tmp2-tmp);
 566                         } else {
 567                                 charset = g_strdup (tmp);
 568                         }
 569                 }
 570         }
 571
 572         if (tny_mime_part_content_type_is (part, "text/html")) {
 573                 set_html_part (self, part, charset);
 574         } else {
 575                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 576                         if (header_content_type) {
 577                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 578                                         set_html_part (self, part, charset);
 579                                 else
 580                                         set_text_part (self, part);
 581
 582                         } else {
 583                                 set_text_part (self, part);
 584                         }
 585                 } else {
 586                         set_text_part (self, part);
 587                 }
 588         }
 589         g_free (header_content_type_lower);
 590         g_free (header_content_type);
 591
 592 }
 593
 594 static TnyMimePart*
 595 get_part (ModestGtkhtmlMimePartView *self)
 596 {
 597         TnyMimePart *part;
 598
 599         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 600
 601         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 602
 603         if (part)
 604                 g_object_ref (part);
 605
 606         return part;
 607 }
 608
 609 static gboolean
 610 has_contents_receiver (gpointer engine, const gchar *data,
 611                        size_t len, gboolean *has_contents)
 612 {
 613         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 614                 *has_contents = TRUE;
 615                 return FALSE;
 616         }
 617         return TRUE;
 618 }
 619
 620 static gboolean
 621 is_empty   (ModestGtkhtmlMimePartView *self)
 622 {
 623         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 624          * text in the message:
 625          */
 626         gboolean has_contents = FALSE;
 627
 628         gtk_html_export (GTK_HTML (self), "text/plain",
 629                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 630
 631         return !has_contents;
 632 }
 633
 634 static gboolean
 635 get_view_images   (ModestGtkhtmlMimePartView *self)
 636 {
 637         ModestGtkhtmlMimePartViewPrivate *priv;
 638
 639         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 640
 641         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 642         return priv->view_images;
 643 }
 644
 645 static void
 646 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 647 {
 648         ModestGtkhtmlMimePartViewPrivate *priv;
 649
 650         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 651
 652         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 653         priv->view_images = view_images;
 654 }
 655
 656 static gboolean
 657 has_external_images   (ModestGtkhtmlMimePartView *self)
 658 {
 659         ModestGtkhtmlMimePartViewPrivate *priv;
 660
 661         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 662
 663         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 664         return priv->has_external_images;
 665 }
 666
 667 static void
 668 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 669 {
 670         ModestGtkhtmlMimePartViewPrivate *priv;
 671
 672         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 673
 674         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 675         priv->current_zoom = zoom;
 676         gtk_html_set_magnification (GTK_HTML(self), zoom);
 677
 678         gtk_widget_queue_resize (GTK_WIDGET (self));
 679 }
 680
 681 static gdouble
 682 get_zoom (ModestGtkhtmlMimePartView *self)
 683 {
 684         ModestGtkhtmlMimePartViewPrivate *priv;
 685
 686         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 687
 688         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 689
 690         return priv->current_zoom;
 691 }
 692
 693 static gboolean
 694 search (ModestGtkhtmlMimePartView *self,
 695         const gchar *string)
 696 {
 697         return gtk_html_engine_search (GTK_HTML (self),
 698                                        string,
 699                                        FALSE,   /* case sensitive */
 700                                        TRUE,    /* forward */
 701                                        FALSE);  /* regexp */
 702 }
 703
 704 static gboolean
 705 search_next (ModestGtkhtmlMimePartView *self)
 706 {
 707         return gtk_html_engine_search_next (GTK_HTML (self));
 708 }
 709
 710 static gboolean
 711 get_selection_area (ModestGtkhtmlMimePartView *self,
 712                     gint *x, gint *y,
 713                     gint *width, gint *height)
 714 {
 715 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 716         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 717         return TRUE;
 718 #else
 719         return FALSE;
 720 #endif
 721 }
 722
 723
 724 /* TNY MIME PART IMPLEMENTATION */
 725
 726 static void
 727 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 728 {
 729         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 730
 731         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 732         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 733         klass->clear = modest_gtkhtml_mime_part_view_clear;
 734
 735         return;
 736 }
 737
 738 static TnyMimePart*
 739 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 740 {
 741         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 742 }
 743
 744
 745 static TnyMimePart*
 746 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 747 {
 748         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 749 }
 750
 751 static void
 752 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 753                                         TnyMimePart *part)
 754 {
 755         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 756 }
 757
 758 static void
 759 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 760                                                 TnyMimePart *part)
 761 {
 762         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 763
 764         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 765 }
 766
 767 static void
 768 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 769 {
 770         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 771 }
 772
 773 static void
 774 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 775 {
 776         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 777 }
 778
 779 /* MODEST MIME PART VIEW IMPLEMENTATION */
 780
 781 static void
 782 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 783 {
 784         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 785
 786         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 787         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 788         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 789         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 790
 791         return;
 792 }
 793
 794 static gboolean
 795 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 796 {
 797         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 798 }
 799
 800 static gboolean
 801 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 802 {
 803         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 804 }
 805
 806 static void
 807 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 808 {
 809         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 810 }
 811
 812 static gboolean
 813 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 814 {
 815         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 816 }
 817
 818 static gboolean
 819 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 820 {
 821         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 822 }
 823
 824 static gboolean
 825 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 826 {
 827         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 828 }
 829
 830 static void
 831 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 832 {
 833         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 834 }
 835
 836 static gboolean
 837 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 838 {
 839         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 840 }
 841
 842
 843 /* MODEST ZOOMABLE IMPLEMENTATION */
 844 static void
 845 modest_zoomable_init (gpointer g, gpointer iface_data)
 846 {
 847         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 848
 849         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 850         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 851         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 852         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 853
 854         return;
 855 }
 856
 857 static gdouble
 858 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 859 {
 860         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 861 }
 862
 863 static gdouble
 864 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 865 {
 866         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 867 }
 868
 869 static void
 870 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 871 {
 872         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 873 }
 874
 875 static void
 876 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 877 {
 878         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 879 }
 880
 881 static gboolean
 882 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 883 {
 884         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 885 }
 886
 887 static gboolean
 888 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 889 {
 890         /* operation not supported in ModestGtkhtmlMimePartView */
 891         return FALSE;
 892 }
 893
 894 static gboolean
 895 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 896 {
 897         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 898 }
 899
 900 static gboolean
 901 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 902 {
 903         /* operation not supported in ModestGtkhtmlMimePartView */
 904         return FALSE;
 905 }
 906
 907 /* ISEARCH VIEW IMPLEMENTATION */
 908 static void
 909 modest_isearch_view_init (gpointer g, gpointer iface_data)
 910 {
 911         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 912
 913         klass->search_func = modest_gtkhtml_mime_part_view_search;
 914         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 915         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 916
 917         return;
 918 }
 919
 920 static gboolean
 921 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 922 {
 923         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 924 }
 925
 926 static gboolean
 927 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 928 {
 929         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 930 }
 931
 932 static gboolean
 933 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 934 {
 935         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 936 }
 937
 938 static gboolean
 939 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 940 {
 941         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 942 }
 943
 944 static gboolean
 945 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 946                                                   gint *width, gint *height)
 947 {
 948         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 949 }
 950
 951 static gboolean
 952 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 953                                                           gint *width, gint *height)
 954 {
 955         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 956 }