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         gtk_container_set_border_width (GTK_CONTAINER (self), MODEST_MARGIN_DEFAULT);
 281
 282 #ifdef MODEST_TOOLKIT_HILDON2
 283 #ifdef HAVE_GTK_HTML_SET_MAX_IMAGE_SIZE
 284         /* We set a maximum width of a bit less than the width of the screen, and a
 285            maximum height of 2 times the full size of the window. Should be enough */
 286         gtk_html_set_max_image_size (GTK_HTML (self), 720, 880);
 287 #endif
 288 #ifdef HAVE_GTK_HTML_SET_ALLOW_DND
 289         gtk_html_set_allow_dnd       (GTK_HTML(self), FALSE);
 290 #endif
 291 #endif
 292
 293 #ifdef HAVE_GTK_HTML_SET_DEFAULT_ENGINE
 294         /* Enable Content type handling */
 295         gtk_html_set_default_engine (GTK_HTML (self), TRUE);
 296 #endif
 297
 298         gdk_color_parse ("#fff", &base);
 299         gdk_color_parse ("#000", &text);
 300         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 301         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 302
 303         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 304                                                        G_OBJECT(self), "link_clicked",
 305                                                        G_CALLBACK(on_link_clicked), self);
 306         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 307                                                        G_OBJECT(self), "url_requested",
 308                                                        G_CALLBACK(on_url_requested), self);
 309         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 310                                                        G_OBJECT(self), "on_url",
 311                                                        G_CALLBACK(on_url), self);
 312         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 313                                                        G_OBJECT(self), "notify::style",
 314                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 315
 316         priv->part = NULL;
 317         priv->current_zoom = 1.0;
 318         priv->view_images = FALSE;
 319         priv->has_external_images = FALSE;
 320 }
 321
 322 static void
 323 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 324 {
 325         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 326
 327         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 328         priv->sighandlers = NULL;
 329
 330         G_OBJECT_CLASS (parent_class)->finalize (obj);
 331 }
 332
 333 static void
 334 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 335 {
 336         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 337
 338         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 339
 340         if (priv->part) {
 341                 g_object_unref (priv->part);
 342                 priv->part = NULL;
 343         }
 344
 345         G_OBJECT_CLASS (parent_class)->dispose (obj);
 346 }
 347
 348 /* GTKHTML SIGNALS HANDLERS */
 349
 350 static void
 351 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 352 {
 353         if (strcmp ("style", spec->name) == 0) {
 354                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 355                                  g_object_ref (obj), g_object_unref);
 356                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 357         }
 358 }
 359
 360 gboolean
 361 same_color (GdkColor *a, GdkColor *b)
 362 {
 363         return ((a->red == b->red) &&
 364                 (a->green == b->green) &&
 365                 (a->blue == b->blue));
 366 }
 367
 368 static gboolean
 369 update_style (ModestGtkhtmlMimePartView *self)
 370 {
 371         GdkColor base;
 372         GdkColor text;
 373         GtkRcStyle *rc_style;
 374
 375         gdk_threads_enter ();
 376
 377         if (GTK_WIDGET_VISIBLE (self)) {
 378                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 379
 380                 gdk_color_parse ("#fff", &base);
 381                 gdk_color_parse ("#000", &text);
 382
 383                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 384                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 385
 386                         rc_style->base[GTK_STATE_NORMAL] = base;
 387                         rc_style->text[GTK_STATE_NORMAL] = text;
 388                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 389                 }
 390         }
 391
 392         gdk_threads_leave ();
 393
 394         return FALSE;
 395 }
 396
 397
 398
 399 static gboolean
 400 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 401 {
 402         gboolean result;
 403         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 404
 405         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 406         return result;
 407 }
 408
 409 static gboolean
 410 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 411 {
 412         gboolean result;
 413         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 414
 415         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 416         return result;
 417 }
 418
 419 static gboolean
 420 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 421                   ModestGtkhtmlMimePartView *self)
 422 {
 423         gboolean result;
 424         TnyStream *tny_stream;
 425         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 426
 427         if (g_str_has_prefix (uri, "http:")) {
 428                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 429
 430                 if (!priv->view_images)
 431                         priv->has_external_images = TRUE;
 432         }
 433
 434         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 435         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 436         g_object_unref (tny_stream);
 437         return result;
 438 }
 439
 440 /* INTERNAL API */
 441 static void
 442 decode_to_stream_cb (TnyMimePart *self,
 443                      gboolean cancelled,
 444                      TnyStream *stream,
 445                      GError *err,
 446                      gpointer user_data)
 447 {
 448         gboolean is_text = GPOINTER_TO_INT (user_data);
 449
 450         if (is_text) {
 451                 if (tny_stream_write (stream, "\n", 1) == -1) {
 452                         g_warning ("failed to write CR in %s", __FUNCTION__);
 453                 }
 454                 tny_stream_reset (stream);
 455         }
 456         tny_stream_close (stream);
 457 }
 458
 459 static void
 460 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding)
 461 {
 462         GtkHTMLStream *gtkhtml_stream;
 463         TnyStream *tny_stream;
 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         gtkhtml_stream = gtk_html_begin_full(GTK_HTML(self), NULL, (char *) encoding, 0);
 471
 472         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 473         tny_stream_reset (tny_stream);
 474
 475         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 476                                               tny_stream, decode_to_stream_cb,
 477                                               NULL, GINT_TO_POINTER (FALSE));
 478         g_object_unref (tny_stream);
 479 }
 480
 481 static void
 482 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 483 {
 484         TnyStream* text_to_html_stream, *tny_stream;
 485         GtkHTMLStream *gtkhtml_stream;
 486
 487         g_return_if_fail (self);
 488         g_return_if_fail (part);
 489
 490         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 491
 492         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 493         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 494         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 495         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 496                                                       64*1024);
 497         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 498                                                    640*1024);
 499
 500         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 501                                               text_to_html_stream, decode_to_stream_cb,
 502                                               NULL, GINT_TO_POINTER (TRUE));
 503
 504         g_object_unref (G_OBJECT(text_to_html_stream));
 505         g_object_unref (G_OBJECT(tny_stream));
 506 }
 507
 508 static void
 509 set_empty_part (ModestGtkhtmlMimePartView *self)
 510 {
 511         g_return_if_fail (self);
 512
 513         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 514         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 515 }
 516
 517 static void
 518 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 519 {
 520         ModestGtkhtmlMimePartViewPrivate *priv;
 521         gchar *header_content_type, *header_content_type_lower;
 522         const gchar *tmp;
 523         gchar *charset = NULL;
 524
 525         g_return_if_fail (self);
 526
 527         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 528         priv->has_external_images = FALSE;
 529
 530         if (part != priv->part) {
 531                 if (priv->part)
 532                         g_object_unref (G_OBJECT(priv->part));
 533                 if (part)
 534                         g_object_ref   (G_OBJECT(part));
 535                 priv->part = part;
 536         }
 537
 538         if (!part) {
 539                 set_empty_part (self);
 540                 return;
 541         }
 542
 543         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 544         if (header_content_type) {
 545                 header_content_type = g_strstrip (header_content_type);
 546                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 547         } else {
 548                 header_content_type_lower = NULL;
 549         }
 550
 551         if (header_content_type_lower) {
 552                 tmp = strstr (header_content_type_lower, "charset=");
 553                 if (tmp) {
 554                         const gchar *tmp2;
 555                         tmp = tmp + strlen ("charset=");
 556
 557                         tmp2 = strstr (tmp, ";");
 558                         if (tmp2) {
 559                                 charset = g_strndup (tmp, tmp2-tmp);
 560                         } else {
 561                                 charset = g_strdup (tmp);
 562                         }
 563                 }
 564         }
 565
 566         if (tny_mime_part_content_type_is (part, "text/html")) {
 567                 set_html_part (self, part, charset);
 568         } else {
 569                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 570                         if (header_content_type) {
 571                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 572                                         set_html_part (self, part, charset);
 573                                 else
 574                                         set_text_part (self, part);
 575
 576                         } else {
 577                                 set_text_part (self, part);
 578                         }
 579                 } else {
 580                         set_text_part (self, part);
 581                 }
 582         }
 583         g_free (header_content_type_lower);
 584         g_free (header_content_type);
 585
 586 }
 587
 588 static TnyMimePart*
 589 get_part (ModestGtkhtmlMimePartView *self)
 590 {
 591         TnyMimePart *part;
 592
 593         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 594
 595         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 596
 597         if (part)
 598                 g_object_ref (part);
 599
 600         return part;
 601 }
 602
 603 static gboolean
 604 has_contents_receiver (gpointer engine, const gchar *data,
 605                        size_t len, gboolean *has_contents)
 606 {
 607         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 608                 *has_contents = TRUE;
 609                 return FALSE;
 610         }
 611         return TRUE;
 612 }
 613
 614 static gboolean
 615 is_empty   (ModestGtkhtmlMimePartView *self)
 616 {
 617         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 618          * text in the message:
 619          */
 620         gboolean has_contents = FALSE;
 621
 622         gtk_html_export (GTK_HTML (self), "text/plain",
 623                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 624
 625         return !has_contents;
 626 }
 627
 628 static gboolean
 629 get_view_images   (ModestGtkhtmlMimePartView *self)
 630 {
 631         ModestGtkhtmlMimePartViewPrivate *priv;
 632
 633         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 634
 635         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 636         return priv->view_images;
 637 }
 638
 639 static void
 640 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 641 {
 642         ModestGtkhtmlMimePartViewPrivate *priv;
 643
 644         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 645
 646         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 647         priv->view_images = view_images;
 648 }
 649
 650 static gboolean
 651 has_external_images   (ModestGtkhtmlMimePartView *self)
 652 {
 653         ModestGtkhtmlMimePartViewPrivate *priv;
 654
 655         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 656
 657         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 658         return priv->has_external_images;
 659 }
 660
 661 static void
 662 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 663 {
 664         ModestGtkhtmlMimePartViewPrivate *priv;
 665
 666         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 667
 668         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 669         priv->current_zoom = zoom;
 670         gtk_html_set_magnification (GTK_HTML(self), zoom);
 671
 672         gtk_widget_queue_resize (GTK_WIDGET (self));
 673 }
 674
 675 static gdouble
 676 get_zoom (ModestGtkhtmlMimePartView *self)
 677 {
 678         ModestGtkhtmlMimePartViewPrivate *priv;
 679
 680         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 681
 682         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 683
 684         return priv->current_zoom;
 685 }
 686
 687 static gboolean
 688 search (ModestGtkhtmlMimePartView *self,
 689         const gchar *string)
 690 {
 691         return gtk_html_engine_search (GTK_HTML (self),
 692                                        string,
 693                                        FALSE,   /* case sensitive */
 694                                        TRUE,    /* forward */
 695                                        FALSE);  /* regexp */
 696 }
 697
 698 static gboolean
 699 search_next (ModestGtkhtmlMimePartView *self)
 700 {
 701         return gtk_html_engine_search_next (GTK_HTML (self));
 702 }
 703
 704 static gboolean
 705 get_selection_area (ModestGtkhtmlMimePartView *self,
 706                     gint *x, gint *y,
 707                     gint *width, gint *height)
 708 {
 709 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 710         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 711         return TRUE;
 712 #else
 713         return FALSE;
 714 #endif
 715 }
 716
 717
 718 /* TNY MIME PART IMPLEMENTATION */
 719
 720 static void
 721 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 722 {
 723         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 724
 725         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 726         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 727         klass->clear = modest_gtkhtml_mime_part_view_clear;
 728
 729         return;
 730 }
 731
 732 static TnyMimePart*
 733 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 734 {
 735         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 736 }
 737
 738
 739 static TnyMimePart*
 740 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 741 {
 742         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 743 }
 744
 745 static void
 746 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 747                                         TnyMimePart *part)
 748 {
 749         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 750 }
 751
 752 static void
 753 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 754                                                 TnyMimePart *part)
 755 {
 756         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 757
 758         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 759 }
 760
 761 static void
 762 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 763 {
 764         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 765 }
 766
 767 static void
 768 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 769 {
 770         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 771 }
 772
 773 /* MODEST MIME PART VIEW IMPLEMENTATION */
 774
 775 static void
 776 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 777 {
 778         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 779
 780         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 781         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 782         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 783         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 784
 785         return;
 786 }
 787
 788 static gboolean
 789 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 790 {
 791         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 792 }
 793
 794 static gboolean
 795 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 796 {
 797         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 798 }
 799
 800 static void
 801 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 802 {
 803         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 804 }
 805
 806 static gboolean
 807 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 808 {
 809         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 810 }
 811
 812 static gboolean
 813 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 814 {
 815         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 816 }
 817
 818 static gboolean
 819 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 820 {
 821         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 822 }
 823
 824 static void
 825 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 826 {
 827         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 828 }
 829
 830 static gboolean
 831 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 832 {
 833         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 834 }
 835
 836
 837 /* MODEST ZOOMABLE IMPLEMENTATION */
 838 static void
 839 modest_zoomable_init (gpointer g, gpointer iface_data)
 840 {
 841         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 842
 843         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 844         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 845         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 846         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 847
 848         return;
 849 }
 850
 851 static gdouble
 852 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 853 {
 854         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 855 }
 856
 857 static gdouble
 858 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 859 {
 860         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 861 }
 862
 863 static void
 864 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 865 {
 866         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 867 }
 868
 869 static void
 870 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 871 {
 872         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 873 }
 874
 875 static gboolean
 876 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 877 {
 878         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 879 }
 880
 881 static gboolean
 882 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 883 {
 884         /* operation not supported in ModestGtkhtmlMimePartView */
 885         return FALSE;
 886 }
 887
 888 static gboolean
 889 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 890 {
 891         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 892 }
 893
 894 static gboolean
 895 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 896 {
 897         /* operation not supported in ModestGtkhtmlMimePartView */
 898         return FALSE;
 899 }
 900
 901 /* ISEARCH VIEW IMPLEMENTATION */
 902 static void
 903 modest_isearch_view_init (gpointer g, gpointer iface_data)
 904 {
 905         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 906
 907         klass->search_func = modest_gtkhtml_mime_part_view_search;
 908         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 909         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 910
 911         return;
 912 }
 913
 914 static gboolean
 915 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 916 {
 917         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 918 }
 919
 920 static gboolean
 921 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 922 {
 923         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 924 }
 925
 926 static gboolean
 927 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 928 {
 929         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 930 }
 931
 932 static gboolean
 933 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 934 {
 935         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 936 }
 937
 938 static gboolean
 939 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 940                                                   gint *width, gint *height)
 941 {
 942         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 943 }
 944
 945 static gboolean
 946 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 947                                                           gint *width, gint *height)
 948 {
 949         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 950 }