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         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 474         tny_stream_reset (tny_stream);
 475
 476         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 477                                               tny_stream, decode_to_stream_cb,
 478                                               NULL, GINT_TO_POINTER (FALSE));
 479         g_object_unref (tny_stream);
 480 }
 481
 482 static void
 483 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 484 {
 485         TnyStream* text_to_html_stream, *tny_stream;
 486         GtkHTMLStream *gtkhtml_stream;
 487
 488         g_return_if_fail (self);
 489         g_return_if_fail (part);
 490
 491         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 492
 493         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 494         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 495         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 496         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 497         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 498                                                       64*1024);
 499         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 500                                                    128*1024);
 501
 502         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 503                                               text_to_html_stream, decode_to_stream_cb,
 504                                               NULL, GINT_TO_POINTER (TRUE));
 505
 506         g_object_unref (G_OBJECT(text_to_html_stream));
 507         g_object_unref (G_OBJECT(tny_stream));
 508 }
 509
 510 static void
 511 set_empty_part (ModestGtkhtmlMimePartView *self)
 512 {
 513         g_return_if_fail (self);
 514
 515         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 516         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 517 }
 518
 519 static void
 520 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 521 {
 522         ModestGtkhtmlMimePartViewPrivate *priv;
 523         gchar *header_content_type, *header_content_type_lower;
 524         const gchar *tmp;
 525         gchar *charset = NULL;
 526
 527         g_return_if_fail (self);
 528
 529         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 530         priv->has_external_images = FALSE;
 531
 532         if (part != priv->part) {
 533                 if (priv->part)
 534                         g_object_unref (G_OBJECT(priv->part));
 535                 if (part)
 536                         g_object_ref   (G_OBJECT(part));
 537                 priv->part = part;
 538         }
 539
 540         if (!part) {
 541                 set_empty_part (self);
 542                 return;
 543         }
 544
 545         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 546         if (header_content_type) {
 547                 header_content_type = g_strstrip (header_content_type);
 548                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 549         } else {
 550                 header_content_type_lower = NULL;
 551         }
 552
 553         if (header_content_type_lower) {
 554                 tmp = strstr (header_content_type_lower, "charset=");
 555                 if (tmp) {
 556                         const gchar *tmp2;
 557                         tmp = tmp + strlen ("charset=");
 558
 559                         tmp2 = strstr (tmp, ";");
 560                         if (tmp2) {
 561                                 charset = g_strndup (tmp, tmp2-tmp);
 562                         } else {
 563                                 charset = g_strdup (tmp);
 564                         }
 565                 }
 566         }
 567
 568         if (tny_mime_part_content_type_is (part, "text/html")) {
 569                 set_html_part (self, part, charset);
 570         } else {
 571                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 572                         if (header_content_type) {
 573                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 574                                         set_html_part (self, part, charset);
 575                                 else
 576                                         set_text_part (self, part);
 577
 578                         } else {
 579                                 set_text_part (self, part);
 580                         }
 581                 } else {
 582                         set_text_part (self, part);
 583                 }
 584         }
 585         g_free (header_content_type_lower);
 586         g_free (header_content_type);
 587
 588 }
 589
 590 static TnyMimePart*
 591 get_part (ModestGtkhtmlMimePartView *self)
 592 {
 593         TnyMimePart *part;
 594
 595         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 596
 597         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 598
 599         if (part)
 600                 g_object_ref (part);
 601
 602         return part;
 603 }
 604
 605 static gboolean
 606 has_contents_receiver (gpointer engine, const gchar *data,
 607                        size_t len, gboolean *has_contents)
 608 {
 609         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 610                 *has_contents = TRUE;
 611                 return FALSE;
 612         }
 613         return TRUE;
 614 }
 615
 616 static gboolean
 617 is_empty   (ModestGtkhtmlMimePartView *self)
 618 {
 619         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 620          * text in the message:
 621          */
 622         gboolean has_contents = FALSE;
 623
 624         gtk_html_export (GTK_HTML (self), "text/plain",
 625                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 626
 627         return !has_contents;
 628 }
 629
 630 static gboolean
 631 get_view_images   (ModestGtkhtmlMimePartView *self)
 632 {
 633         ModestGtkhtmlMimePartViewPrivate *priv;
 634
 635         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 636
 637         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 638         return priv->view_images;
 639 }
 640
 641 static void
 642 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 643 {
 644         ModestGtkhtmlMimePartViewPrivate *priv;
 645
 646         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 647
 648         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 649         priv->view_images = view_images;
 650 }
 651
 652 static gboolean
 653 has_external_images   (ModestGtkhtmlMimePartView *self)
 654 {
 655         ModestGtkhtmlMimePartViewPrivate *priv;
 656
 657         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 658
 659         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 660         return priv->has_external_images;
 661 }
 662
 663 static void
 664 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 665 {
 666         ModestGtkhtmlMimePartViewPrivate *priv;
 667
 668         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 669
 670         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 671         priv->current_zoom = zoom;
 672         gtk_html_set_magnification (GTK_HTML(self), zoom);
 673
 674         gtk_widget_queue_resize (GTK_WIDGET (self));
 675 }
 676
 677 static gdouble
 678 get_zoom (ModestGtkhtmlMimePartView *self)
 679 {
 680         ModestGtkhtmlMimePartViewPrivate *priv;
 681
 682         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 683
 684         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 685
 686         return priv->current_zoom;
 687 }
 688
 689 static gboolean
 690 search (ModestGtkhtmlMimePartView *self,
 691         const gchar *string)
 692 {
 693         return gtk_html_engine_search (GTK_HTML (self),
 694                                        string,
 695                                        FALSE,   /* case sensitive */
 696                                        TRUE,    /* forward */
 697                                        FALSE);  /* regexp */
 698 }
 699
 700 static gboolean
 701 search_next (ModestGtkhtmlMimePartView *self)
 702 {
 703         return gtk_html_engine_search_next (GTK_HTML (self));
 704 }
 705
 706 static gboolean
 707 get_selection_area (ModestGtkhtmlMimePartView *self,
 708                     gint *x, gint *y,
 709                     gint *width, gint *height)
 710 {
 711 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 712         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 713         return TRUE;
 714 #else
 715         return FALSE;
 716 #endif
 717 }
 718
 719
 720 /* TNY MIME PART IMPLEMENTATION */
 721
 722 static void
 723 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 724 {
 725         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 726
 727         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 728         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 729         klass->clear = modest_gtkhtml_mime_part_view_clear;
 730
 731         return;
 732 }
 733
 734 static TnyMimePart*
 735 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 736 {
 737         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 738 }
 739
 740
 741 static TnyMimePart*
 742 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 743 {
 744         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 745 }
 746
 747 static void
 748 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 749                                         TnyMimePart *part)
 750 {
 751         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 752 }
 753
 754 static void
 755 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 756                                                 TnyMimePart *part)
 757 {
 758         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 759
 760         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 761 }
 762
 763 static void
 764 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 765 {
 766         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 767 }
 768
 769 static void
 770 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 771 {
 772         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 773 }
 774
 775 /* MODEST MIME PART VIEW IMPLEMENTATION */
 776
 777 static void
 778 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 779 {
 780         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 781
 782         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 783         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 784         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 785         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 786
 787         return;
 788 }
 789
 790 static gboolean
 791 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 792 {
 793         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 794 }
 795
 796 static gboolean
 797 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 798 {
 799         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 800 }
 801
 802 static void
 803 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 804 {
 805         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 806 }
 807
 808 static gboolean
 809 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 810 {
 811         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 812 }
 813
 814 static gboolean
 815 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 816 {
 817         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 818 }
 819
 820 static gboolean
 821 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 822 {
 823         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 824 }
 825
 826 static void
 827 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 828 {
 829         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 830 }
 831
 832 static gboolean
 833 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 834 {
 835         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 836 }
 837
 838
 839 /* MODEST ZOOMABLE IMPLEMENTATION */
 840 static void
 841 modest_zoomable_init (gpointer g, gpointer iface_data)
 842 {
 843         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 844
 845         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 846         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 847         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 848         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 849
 850         return;
 851 }
 852
 853 static gdouble
 854 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 855 {
 856         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 857 }
 858
 859 static gdouble
 860 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 861 {
 862         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 863 }
 864
 865 static void
 866 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 867 {
 868         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 869 }
 870
 871 static void
 872 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 873 {
 874         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 875 }
 876
 877 static gboolean
 878 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 879 {
 880         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 881 }
 882
 883 static gboolean
 884 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 885 {
 886         /* operation not supported in ModestGtkhtmlMimePartView */
 887         return FALSE;
 888 }
 889
 890 static gboolean
 891 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 892 {
 893         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 894 }
 895
 896 static gboolean
 897 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 898 {
 899         /* operation not supported in ModestGtkhtmlMimePartView */
 900         return FALSE;
 901 }
 902
 903 /* ISEARCH VIEW IMPLEMENTATION */
 904 static void
 905 modest_isearch_view_init (gpointer g, gpointer iface_data)
 906 {
 907         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 908
 909         klass->search_func = modest_gtkhtml_mime_part_view_search;
 910         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 911         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 912
 913         return;
 914 }
 915
 916 static gboolean
 917 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 918 {
 919         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 920 }
 921
 922 static gboolean
 923 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 924 {
 925         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 926 }
 927
 928 static gboolean
 929 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 930 {
 931         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 932 }
 933
 934 static gboolean
 935 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 936 {
 937         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 938 }
 939
 940 static gboolean
 941 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 942                                                   gint *width, gint *height)
 943 {
 944         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 945 }
 946
 947 static gboolean
 948 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 949                                                           gint *width, gint *height)
 950 {
 951         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 952 }