git.maemo.org Git - modest/blob - src/widgets/modest-webkit-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-webkit-mime-part-view.h>
  32 #include <string.h>
  33 #include <webkit/webkit.h>
  34 #include <tny-stream.h>
  35 #include <tny-mime-part-view.h>
  36 #include "modest-tny-mime-part.h"
  37 #include <modest-stream-text-to-html.h>
  38 #include <modest-text-utils.h>
  39 #include <modest-conf.h>
  40 #include <modest-runtime.h>
  41 #include <widgets/modest-mime-part-view.h>
  42 #include <widgets/modest-zoomable.h>
  43 #include <libgnomevfs/gnome-vfs.h>
  44 #include <gdk/gdkkeysyms.h>
  45 #include <modest-ui-constants.h>
  46 #include <modest-tny-stream-webkit.h>
  47
  48 /* gobject structure methods */
  49 static void    modest_webkit_mime_part_view_class_init (ModestWebkitMimePartViewClass *klass);
  50 static void    tny_mime_part_view_init                  (gpointer g, gpointer iface_data);
  51 static void    modest_mime_part_view_init               (gpointer g, gpointer iface_data);
  52 static void    modest_zoomable_init                     (gpointer g, gpointer iface_data);
  53 static void    modest_isearch_view_init                 (gpointer g, gpointer iface_data);
  54 static void    modest_webkit_mime_part_view_init       (ModestWebkitMimePartView *self);
  55 static void    modest_webkit_mime_part_view_finalize   (GObject *self);
  56 static void    modest_webkit_mime_part_view_dispose    (GObject *self);
  57
  58 /* Webkit signal handlers */
  59 static void on_resource_request_starting (WebKitWebView *webview,
  60                                           WebKitWebFrame *frame,
  61                                           WebKitWebResource *resource,
  62                                           WebKitNetworkRequest *request,
  63                                           WebKitNetworkResponse *response,
  64                                           gpointer userdata);
  65 static gboolean on_new_window_policy_decision_requested (WebKitWebView             *web_view,
  66                                                          WebKitWebFrame            *frame,
  67                                                          WebKitNetworkRequest      *request,
  68                                                          WebKitWebNavigationAction *navigation_action,
  69                                                          WebKitWebPolicyDecision   *policy_decision,
  70                                                          gpointer                   user_data);
  71 static gboolean on_navigation_policy_decision_requested (WebKitWebView             *web_view,
  72                                                          WebKitWebFrame            *frame,
  73                                                          WebKitNetworkRequest      *request,
  74                                                          WebKitWebNavigationAction *navigation_action,
  75                                                          WebKitWebPolicyDecision   *policy_decision,
  76                                                          gpointer                   user_data);
  77 static WebKitNavigationResponse on_navigation_requested                      (WebKitWebView        *web_view,
  78                                                                               WebKitWebFrame       *frame,
  79                                                                               WebKitNetworkRequest *request,
  80                                                                               gpointer              user_data);
  81 static void      on_notify_style  (GObject *obj, GParamSpec *spec, gpointer userdata);
  82 static gboolean  update_style     (ModestWebkitMimePartView *self);
  83 /* TnyMimePartView implementation */
  84 static void modest_webkit_mime_part_view_clear (TnyMimePartView *self);
  85 static void modest_webkit_mime_part_view_clear_default (TnyMimePartView *self);
  86 static void modest_webkit_mime_part_view_set_part (TnyMimePartView *self, TnyMimePart *part);
  87 static void modest_webkit_mime_part_view_set_part_default (TnyMimePartView *self, TnyMimePart *part);
  88 static TnyMimePart* modest_webkit_mime_part_view_get_part (TnyMimePartView *self);
  89 static TnyMimePart* modest_webkit_mime_part_view_get_part_default (TnyMimePartView *self);
  90 /* ModestMimePartView implementation */
  91 static gboolean modest_webkit_mime_part_view_is_empty (ModestMimePartView *self);
  92 static gboolean modest_webkit_mime_part_view_is_empty_default (ModestMimePartView *self);
  93 static gboolean modest_webkit_mime_part_view_get_view_images (ModestMimePartView *self);
  94 static gboolean modest_webkit_mime_part_view_get_view_images_default (ModestMimePartView *self);
  95 static void     modest_webkit_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images);
  96 static void     modest_webkit_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images);
  97 static gboolean modest_webkit_mime_part_view_has_external_images (ModestMimePartView *self);
  98 static gboolean modest_webkit_mime_part_view_has_external_images_default (ModestMimePartView *self);
  99 /* ModestZoomable implementation */
 100 static gdouble modest_webkit_mime_part_view_get_zoom (ModestZoomable *self);
 101 static void modest_webkit_mime_part_view_set_zoom (ModestZoomable *self, gdouble value);
 102 static gboolean modest_webkit_mime_part_view_zoom_minus (ModestZoomable *self);
 103 static gboolean modest_webkit_mime_part_view_zoom_plus (ModestZoomable *self);
 104 static gdouble modest_webkit_mime_part_view_get_zoom_default (ModestZoomable *self);
 105 static void modest_webkit_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value);
 106 static gboolean modest_webkit_mime_part_view_zoom_minus_default (ModestZoomable *self);
 107 static gboolean modest_webkit_mime_part_view_zoom_plus_default (ModestZoomable *self);
 108 /* ModestISearchView implementation */
 109 static gboolean modest_webkit_mime_part_view_search                    (ModestISearchView *self, const gchar *string);
 110 static gboolean modest_webkit_mime_part_view_search_next               (ModestISearchView *self);
 111 static gboolean modest_webkit_mime_part_view_get_selection_area        (ModestISearchView *self, gint *x, gint *y,
 112                                                                          gint *width, gint *height);
 113 static gboolean modest_webkit_mime_part_view_search_default            (ModestISearchView *self, const gchar *string);
 114 static gboolean modest_webkit_mime_part_view_search_next_default       (ModestISearchView *self);
 115 static gboolean modest_webkit_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 116                                                                           gint *width, gint *height);
 117
 118
 119 /* internal api */
 120 static TnyMimePart  *get_part   (ModestWebkitMimePartView *self);
 121 static void          set_html_part   (ModestWebkitMimePartView *self, TnyMimePart *part, const gchar *encoding);
 122 static void          set_text_part   (ModestWebkitMimePartView *self, TnyMimePart *part);
 123 static void          set_empty_part  (ModestWebkitMimePartView *self);
 124 static void          set_part   (ModestWebkitMimePartView *self, TnyMimePart *part);
 125 static gboolean      is_empty   (ModestWebkitMimePartView *self);
 126 static gboolean      get_view_images   (ModestWebkitMimePartView *self);
 127 static void          set_view_images   (ModestWebkitMimePartView *self, gboolean view_images);
 128 static gboolean      has_external_images   (ModestWebkitMimePartView *self);
 129 static void          set_zoom   (ModestWebkitMimePartView *self, gdouble zoom);
 130 static gdouble       get_zoom   (ModestWebkitMimePartView *self);
 131 static gboolean      search             (ModestWebkitMimePartView *self, const gchar *string);
 132 static gboolean      search_next        (ModestWebkitMimePartView *self);
 133 static gboolean      get_selection_area (ModestWebkitMimePartView *self, gint *x, gint *y,
 134                                          gint *width, gint *height);
 135
 136 typedef struct _ModestWebkitMimePartViewPrivate ModestWebkitMimePartViewPrivate;
 137 struct _ModestWebkitMimePartViewPrivate {
 138         TnyMimePart *part;
 139         gdouble current_zoom;
 140         gboolean view_images;
 141         gboolean has_external_images;
 142         GSList *sighandlers;
 143         gchar *last_search;
 144 };
 145
 146 #define MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
 147                                                                                        MODEST_TYPE_WEBKIT_MIME_PART_VIEW, \
 148                                                                                        ModestWebkitMimePartViewPrivate))
 149
 150 enum {
 151         STOP_STREAMS_SIGNAL,
 152         LIMIT_ERROR_SIGNAL,
 153         LAST_SIGNAL
 154 };
 155
 156 static WebKitWebViewClass *parent_class = NULL;
 157
 158 static guint signals[LAST_SIGNAL] = {0};
 159
 160 GtkWidget *
 161 modest_webkit_mime_part_view_new ()
 162 {
 163         return g_object_new (MODEST_TYPE_WEBKIT_MIME_PART_VIEW, NULL);
 164 }
 165
 166 /* GOBJECT IMPLEMENTATION */
 167 GType
 168 modest_webkit_mime_part_view_get_type (void)
 169 {
 170         static GType my_type = 0;
 171         if (!my_type) {
 172                 static const GTypeInfo my_info = {
 173                         sizeof(ModestWebkitMimePartViewClass),
 174                         NULL,           /* base init */
 175                         NULL,           /* base finalize */
 176                         (GClassInitFunc) modest_webkit_mime_part_view_class_init,
 177                         NULL,           /* class finalize */
 178                         NULL,           /* class data */
 179                         sizeof(ModestWebkitMimePartView),
 180                         1,              /* n_preallocs */
 181                         (GInstanceInitFunc) modest_webkit_mime_part_view_init,
 182                         NULL
 183                 };
 184
 185                 static const GInterfaceInfo tny_mime_part_view_info =
 186                 {
 187                   (GInterfaceInitFunc) tny_mime_part_view_init, /* interface_init */
 188                   NULL,         /* interface_finalize */
 189                   NULL          /* interface_data */
 190                 };
 191
 192                 static const GInterfaceInfo modest_mime_part_view_info =
 193                 {
 194                   (GInterfaceInitFunc) modest_mime_part_view_init, /* interface_init */
 195                   NULL,         /* interface_finalize */
 196                   NULL          /* interface_data */
 197                 };
 198
 199                 static const GInterfaceInfo modest_zoomable_info =
 200                 {
 201                   (GInterfaceInitFunc) modest_zoomable_init, /* interface_init */
 202                   NULL,         /* interface_finalize */
 203                   NULL          /* interface_data */
 204                 };
 205
 206                 static const GInterfaceInfo modest_isearch_view_info =
 207                 {
 208                   (GInterfaceInitFunc) modest_isearch_view_init, /* interface_init */
 209                   NULL,         /* interface_finalize */
 210                   NULL          /* interface_data */
 211                 };
 212
 213                 my_type = g_type_register_static (WEBKIT_TYPE_WEB_VIEW,
 214                                                   "ModestWebkitMimePartView",
 215                                                   &my_info, 0);
 216
 217                 g_type_add_interface_static (my_type, TNY_TYPE_MIME_PART_VIEW,
 218                         &tny_mime_part_view_info);
 219
 220                 g_type_add_interface_static (my_type, MODEST_TYPE_MIME_PART_VIEW,
 221                         &modest_mime_part_view_info);
 222
 223                 g_type_add_interface_static (my_type, MODEST_TYPE_ZOOMABLE,
 224                         &modest_zoomable_info);
 225                 g_type_add_interface_static (my_type, MODEST_TYPE_ISEARCH_VIEW,
 226                         &modest_isearch_view_info);
 227         }
 228         return my_type;
 229 }
 230
 231 static void
 232 modest_webkit_mime_part_view_class_init (ModestWebkitMimePartViewClass *klass)
 233 {
 234         GObjectClass *gobject_class;
 235         GtkBindingSet *binding_set;
 236
 237         gobject_class = (GObjectClass*) klass;
 238
 239         parent_class            = g_type_class_peek_parent (klass);
 240         gobject_class->dispose = modest_webkit_mime_part_view_dispose;
 241         gobject_class->finalize = modest_webkit_mime_part_view_finalize;
 242
 243         klass->get_part_func = modest_webkit_mime_part_view_get_part_default;
 244         klass->set_part_func = modest_webkit_mime_part_view_set_part_default;
 245         klass->clear_func = modest_webkit_mime_part_view_clear_default;
 246         klass->is_empty_func = modest_webkit_mime_part_view_is_empty_default;
 247         klass->get_view_images_func = modest_webkit_mime_part_view_get_view_images_default;
 248         klass->set_view_images_func = modest_webkit_mime_part_view_set_view_images_default;
 249         klass->has_external_images_func = modest_webkit_mime_part_view_has_external_images_default;
 250         klass->get_zoom_func = modest_webkit_mime_part_view_get_zoom_default;
 251         klass->set_zoom_func = modest_webkit_mime_part_view_set_zoom_default;
 252         klass->zoom_minus_func = modest_webkit_mime_part_view_zoom_minus_default;
 253         klass->zoom_plus_func = modest_webkit_mime_part_view_zoom_plus_default;
 254         klass->search_func = modest_webkit_mime_part_view_search_default;
 255         klass->search_next_func = modest_webkit_mime_part_view_search_next_default;
 256         klass->get_selection_area_func = modest_webkit_mime_part_view_get_selection_area_default;
 257
 258         binding_set = gtk_binding_set_by_class (klass);
 259         gtk_binding_entry_skip (binding_set, GDK_Down, 0);
 260         gtk_binding_entry_skip (binding_set, GDK_Up, 0);
 261         gtk_binding_entry_skip (binding_set, GDK_KP_Up, 0);
 262         gtk_binding_entry_skip (binding_set, GDK_KP_Down, 0);
 263         gtk_binding_entry_skip (binding_set, GDK_Page_Down, 0);
 264         gtk_binding_entry_skip (binding_set, GDK_Page_Up, 0);
 265         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Up, 0);
 266         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Down, 0);
 267         gtk_binding_entry_skip (binding_set, GDK_Home, 0);
 268         gtk_binding_entry_skip (binding_set, GDK_End, 0);
 269         gtk_binding_entry_skip (binding_set, GDK_KP_Home, 0);
 270         gtk_binding_entry_skip (binding_set, GDK_KP_End, 0);
 271
 272         g_type_class_add_private (gobject_class, sizeof(ModestWebkitMimePartViewPrivate));
 273
 274         signals[STOP_STREAMS_SIGNAL] =
 275                 g_signal_new ("stop-streams",
 276                               G_TYPE_FROM_CLASS (gobject_class),
 277                               G_SIGNAL_RUN_FIRST,
 278                               G_STRUCT_OFFSET (ModestWebkitMimePartViewClass,stop_streams),
 279                               NULL, NULL,
 280                               g_cclosure_marshal_VOID__VOID,
 281                               G_TYPE_NONE, 0);
 282
 283         signals[LIMIT_ERROR_SIGNAL] =
 284                 g_signal_new ("limit-error",
 285                               G_TYPE_FROM_CLASS (gobject_class),
 286                               G_SIGNAL_RUN_FIRST,
 287                               G_STRUCT_OFFSET (ModestWebkitMimePartViewClass,limit_error),
 288                               NULL, NULL,
 289                               g_cclosure_marshal_VOID__VOID,
 290                               G_TYPE_NONE, 0);
 291
 292 }
 293
 294 static void
 295 modest_webkit_mime_part_view_init (ModestWebkitMimePartView *self)
 296 {
 297         ModestWebkitMimePartViewPrivate *priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 298         GdkColor base;
 299         GdkColor text;
 300         WebKitWebSettings *settings;
 301
 302         gdk_color_parse ("#fff", &base);
 303         gdk_color_parse ("#000", &text);
 304         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 305         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 306
 307         priv->sighandlers = NULL;
 308
 309         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 310                                                        G_OBJECT(self), "notify::style",
 311                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 312         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 313                                                        G_OBJECT (self), "resource-request-starting",
 314                                                        G_CALLBACK (on_resource_request_starting), (gpointer) self);
 315         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 316                                                        G_OBJECT (self), "navigation-policy-decision-requested",
 317                                                        G_CALLBACK (on_navigation_policy_decision_requested), (gpointer) self);
 318         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 319                                                        G_OBJECT (self), "new-window-policy-decision-requested",
 320                                                        G_CALLBACK (on_new_window_policy_decision_requested), (gpointer) self);
 321         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 322                                                        G_OBJECT (self), "navigation-requested",
 323                                                        G_CALLBACK (on_navigation_requested), (gpointer) self);
 324
 325         priv->part = NULL;
 326         priv->last_search = NULL;
 327         priv->current_zoom = 1.0;
 328         priv->view_images = FALSE;
 329         priv->has_external_images = FALSE;
 330
 331         settings = webkit_web_settings_new ();
 332         g_object_set (G_OBJECT (settings),
 333                       "auto-load-images", FALSE,
 334                       "enable-html5-database", FALSE,
 335                       "enable-html5-local-storage", FALSE,
 336                       "enable-offline-web-application-cache", FALSE,
 337                       "enable-plugins", FALSE,
 338                       "enable-private-browsing", TRUE,
 339                       "enable-scripts", FALSE,
 340                       NULL);
 341         webkit_web_view_set_settings (WEBKIT_WEB_VIEW (self), settings);
 342         g_object_unref (settings);
 343         g_object_set (G_OBJECT (self),
 344                       "editable", FALSE,
 345                       NULL);
 346 }
 347
 348 static void
 349 modest_webkit_mime_part_view_finalize (GObject *obj)
 350 {
 351         ModestWebkitMimePartViewPrivate *priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (obj);
 352
 353         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 354         priv->sighandlers = NULL;
 355         g_free (priv->last_search);
 356
 357         G_OBJECT_CLASS (parent_class)->finalize (obj);
 358 }
 359
 360 static void
 361 modest_webkit_mime_part_view_dispose (GObject *obj)
 362 {
 363         ModestWebkitMimePartViewPrivate *priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (obj);
 364
 365         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 366
 367         if (priv->part) {
 368                 g_object_unref (priv->part);
 369                 priv->part = NULL;
 370         }
 371
 372         G_OBJECT_CLASS (parent_class)->dispose (obj);
 373 }
 374
 375 /* WEBKIT SIGNALS HANDLERS */
 376
 377 static WebKitNavigationResponse
 378 on_navigation_requested                      (WebKitWebView        *web_view,
 379                                               WebKitWebFrame       *frame,
 380                                               WebKitNetworkRequest *request,
 381                                               gpointer              user_data)
 382 {
 383         const gchar *uri;
 384
 385         uri = webkit_network_request_get_uri (request);
 386         if (g_strcmp0 (uri, "about:blank") == 0) {
 387                 return WEBKIT_NAVIGATION_RESPONSE_ACCEPT;
 388         } else if (g_str_has_prefix (uri, "cid:") == 0) {
 389                 return WEBKIT_NAVIGATION_RESPONSE_DOWNLOAD;
 390         } else {
 391                 return WEBKIT_NAVIGATION_RESPONSE_ACCEPT;
 392         }
 393 }
 394
 395 static void
 396 on_resource_request_starting (WebKitWebView *webview,
 397                               WebKitWebFrame *frame,
 398                               WebKitWebResource *resource,
 399                               WebKitNetworkRequest *request,
 400                               WebKitNetworkResponse *response,
 401                               gpointer userdata)
 402 {
 403         ModestWebkitMimePartView *self = (ModestWebkitMimePartView *) userdata;
 404         g_return_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self));
 405
 406         if (g_str_has_prefix (webkit_network_request_get_uri (request), "http:")) {
 407                 ModestWebkitMimePartViewPrivate *priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 408
 409                 if (!priv->view_images)
 410                         priv->has_external_images = TRUE;
 411         }
 412
 413         webkit_network_request_set_uri (request, "about:blank");
 414 }
 415
 416 static gboolean
 417 on_navigation_policy_decision_requested (WebKitWebView             *web_view,
 418                                          WebKitWebFrame            *frame,
 419                                          WebKitNetworkRequest      *request,
 420                                          WebKitWebNavigationAction *navigation_action,
 421                                          WebKitWebPolicyDecision   *policy_decision,
 422                                          gpointer                   user_data)
 423 {
 424         WebKitWebNavigationReason reason;
 425         reason = webkit_web_navigation_action_get_reason (navigation_action);
 426         if (reason == WEBKIT_WEB_NAVIGATION_REASON_LINK_CLICKED) {
 427                 const gchar *uri;
 428                 gboolean result;
 429
 430                 webkit_web_policy_decision_ignore (policy_decision);
 431                 uri = webkit_network_request_get_uri (WEBKIT_NETWORK_REQUEST (request));
 432                 g_signal_emit_by_name (G_OBJECT (user_data), "activate-link", uri, &result);
 433
 434                 return TRUE;
 435         } else if (reason != WEBKIT_WEB_NAVIGATION_REASON_OTHER) {
 436                 webkit_web_policy_decision_ignore (policy_decision);
 437                 return TRUE;
 438         }
 439         return FALSE;
 440 }
 441
 442 static gboolean
 443 on_new_window_policy_decision_requested (WebKitWebView             *web_view,
 444                                          WebKitWebFrame            *frame,
 445                                          WebKitNetworkRequest      *request,
 446                                          WebKitWebNavigationAction *navigation_action,
 447                                          WebKitWebPolicyDecision   *policy_decision,
 448                                          gpointer                   user_data)
 449 {
 450         WebKitWebNavigationReason reason;
 451         reason = webkit_web_navigation_action_get_reason (navigation_action);
 452         if (reason == WEBKIT_WEB_NAVIGATION_REASON_LINK_CLICKED) {
 453                 const gchar *uri;
 454                 gboolean result;
 455
 456                 webkit_web_policy_decision_ignore (policy_decision);
 457                 uri = webkit_network_request_get_uri (WEBKIT_NETWORK_REQUEST (request));
 458                 g_signal_emit_by_name (G_OBJECT (user_data), "activate-link", uri, &result);
 459
 460                 return TRUE;
 461         } else if (reason != WEBKIT_WEB_NAVIGATION_REASON_OTHER) {
 462                 webkit_web_policy_decision_ignore (policy_decision);
 463                 return TRUE;
 464         }
 465         return FALSE;
 466 }
 467
 468 static void
 469 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 470 {
 471         if (strcmp ("style", spec->name) == 0) {
 472                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 473                                  g_object_ref (obj), g_object_unref);
 474                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 475         }
 476 }
 477
 478 gboolean
 479 same_color (GdkColor *a, GdkColor *b)
 480 {
 481         return ((a->red == b->red) &&
 482                 (a->green == b->green) &&
 483                 (a->blue == b->blue));
 484 }
 485
 486 static gboolean
 487 update_style (ModestWebkitMimePartView *self)
 488 {
 489         GdkColor base;
 490         GdkColor text;
 491         GtkRcStyle *rc_style;
 492
 493         gdk_threads_enter ();
 494
 495         if (GTK_WIDGET_VISIBLE (self)) {
 496                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 497
 498                 gdk_color_parse ("#fff", &base);
 499                 gdk_color_parse ("#000", &text);
 500
 501                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 502                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 503
 504                         rc_style->base[GTK_STATE_NORMAL] = base;
 505                         rc_style->text[GTK_STATE_NORMAL] = text;
 506                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 507                 }
 508         }
 509
 510         gdk_threads_leave ();
 511
 512         return FALSE;
 513 }
 514
 515
 516 /* INTERNAL API */
 517 static void
 518 decode_to_stream_cb (TnyMimePart *self,
 519                      gboolean cancelled,
 520                      TnyStream *stream,
 521                      GError *err,
 522                      gpointer user_data)
 523 {
 524         ModestWebkitMimePartView *view = (ModestWebkitMimePartView *) user_data;
 525
 526         if (MODEST_IS_STREAM_TEXT_TO_HTML (stream)) {
 527                 if (tny_stream_write (stream, "\n", 1) == -1) {
 528                         g_warning ("failed to write CR in %s", __FUNCTION__);
 529                 }
 530                 if (modest_stream_text_to_html_limit_reached (MODEST_STREAM_TEXT_TO_HTML (stream))) {
 531                         g_signal_emit (G_OBJECT (view), signals[LIMIT_ERROR_SIGNAL], 0);
 532                 }
 533                 tny_stream_reset (stream);
 534         } else {
 535                 if (modest_tny_stream_webkit_limit_reached (MODEST_TNY_STREAM_WEBKIT (stream))) {
 536                         g_signal_emit (G_OBJECT (view), signals[LIMIT_ERROR_SIGNAL], 0);
 537                 }
 538         }
 539         tny_stream_close (stream);
 540 }
 541
 542 static void
 543 set_html_part (ModestWebkitMimePartView *self, TnyMimePart *part, const gchar *encoding)
 544 {
 545         TnyStream *tny_stream;
 546
 547         g_return_if_fail (self);
 548         g_return_if_fail (part);
 549
 550         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 551
 552         tny_stream     = TNY_STREAM(modest_tny_stream_webkit_new (WEBKIT_WEB_VIEW (self), "text/html", encoding));
 553         modest_tny_stream_webkit_set_max_size (MODEST_TNY_STREAM_WEBKIT (tny_stream), 128*1024);
 554         tny_stream_reset (tny_stream);
 555
 556         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 557                                               tny_stream, decode_to_stream_cb,
 558                                               NULL, self);
 559         g_object_unref (tny_stream);
 560 }
 561
 562 static void
 563 set_text_part (ModestWebkitMimePartView *self, TnyMimePart *part)
 564 {
 565         TnyStream* text_to_html_stream, *tny_stream;
 566
 567         g_return_if_fail (self);
 568         g_return_if_fail (part);
 569
 570         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 571
 572         tny_stream =  TNY_STREAM(modest_tny_stream_webkit_new (WEBKIT_WEB_VIEW (self), "text/html", "utf-8"));
 573         modest_tny_stream_webkit_set_max_size (MODEST_TNY_STREAM_WEBKIT (tny_stream), 128*1024);
 574         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 575         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 576                                                       64*1024);
 577         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 578                                                    128*1024);
 579         modest_stream_text_to_html_set_line_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 580                                                    1024);
 581
 582         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 583                                               text_to_html_stream, decode_to_stream_cb,
 584                                               NULL, self);
 585
 586         g_object_unref (G_OBJECT(text_to_html_stream));
 587         g_object_unref (G_OBJECT(tny_stream));
 588 }
 589
 590 static void
 591 set_empty_part (ModestWebkitMimePartView *self)
 592 {
 593         g_return_if_fail (self);
 594
 595         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 596         webkit_web_view_load_string (WEBKIT_WEB_VIEW (self), "", "text/plain", "utf-8", NULL);
 597 }
 598
 599 static void
 600 set_part (ModestWebkitMimePartView *self, TnyMimePart *part)
 601 {
 602         ModestWebkitMimePartViewPrivate *priv;
 603         gchar *header_content_type, *header_content_type_lower;
 604         const gchar *tmp;
 605         gchar *charset = NULL;
 606
 607         g_return_if_fail (self);
 608
 609         priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE(self);
 610         priv->has_external_images = FALSE;
 611
 612         if (part != priv->part) {
 613                 if (priv->part)
 614                         g_object_unref (G_OBJECT(priv->part));
 615                 if (part)
 616                         g_object_ref   (G_OBJECT(part));
 617                 priv->part = part;
 618         }
 619
 620         if (!part) {
 621                 set_empty_part (self);
 622                 return;
 623         }
 624
 625         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 626         if (header_content_type) {
 627                 header_content_type = g_strstrip (header_content_type);
 628                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 629         } else {
 630                 header_content_type_lower = NULL;
 631         }
 632
 633         if (header_content_type_lower) {
 634                 tmp = strstr (header_content_type_lower, "charset=");
 635                 if (tmp) {
 636                         const gchar *tmp2;
 637                         tmp = tmp + strlen ("charset=");
 638
 639                         tmp2 = strstr (tmp, ";");
 640                         if (tmp2) {
 641                                 charset = g_strndup (tmp, tmp2-tmp);
 642                         } else {
 643                                 charset = g_strdup (tmp);
 644                         }
 645                 }
 646         }
 647
 648         if (tny_mime_part_content_type_is (part, "text/html")) {
 649                 set_html_part (self, part, charset);
 650         } else {
 651                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 652                         if (header_content_type) {
 653                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 654                                         set_html_part (self, part, charset);
 655                                 else
 656                                         set_text_part (self, part);
 657
 658                         } else {
 659                                 set_text_part (self, part);
 660                         }
 661                 } else {
 662                         set_text_part (self, part);
 663                 }
 664         }
 665         g_free (header_content_type_lower);
 666         g_free (header_content_type);
 667
 668 }
 669
 670 static TnyMimePart*
 671 get_part (ModestWebkitMimePartView *self)
 672 {
 673         TnyMimePart *part;
 674
 675         g_return_val_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self), NULL);
 676
 677         part = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 678
 679         if (part)
 680                 g_object_ref (part);
 681
 682         return part;
 683 }
 684
 685 static gboolean
 686 is_empty   (ModestWebkitMimePartView *self)
 687 {
 688         return FALSE;
 689 }
 690
 691 static gboolean
 692 get_view_images   (ModestWebkitMimePartView *self)
 693 {
 694         ModestWebkitMimePartViewPrivate *priv;
 695
 696         g_return_val_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self), FALSE);
 697
 698         priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 699         return priv->view_images;
 700 }
 701
 702 static void
 703 set_view_images   (ModestWebkitMimePartView *self, gboolean view_images)
 704 {
 705         ModestWebkitMimePartViewPrivate *priv;
 706
 707         g_return_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self));
 708
 709         priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 710         priv->view_images = view_images;
 711 }
 712
 713 static gboolean
 714 has_external_images   (ModestWebkitMimePartView *self)
 715 {
 716         ModestWebkitMimePartViewPrivate *priv;
 717
 718         g_return_val_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self), FALSE);
 719
 720         priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 721         return priv->has_external_images;
 722 }
 723
 724 static void
 725 set_zoom (ModestWebkitMimePartView *self, gdouble zoom)
 726 {
 727         ModestWebkitMimePartViewPrivate *priv;
 728
 729         g_return_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self));
 730
 731         priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 732         priv->current_zoom = zoom;
 733
 734         webkit_web_view_set_zoom_level (WEBKIT_WEB_VIEW (self), zoom);
 735         gtk_widget_queue_resize (GTK_WIDGET (self));
 736 }
 737
 738 static gdouble
 739 get_zoom (ModestWebkitMimePartView *self)
 740 {
 741         ModestWebkitMimePartViewPrivate *priv;
 742
 743         g_return_val_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self), 1.0);
 744
 745         priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 746
 747         return priv->current_zoom;
 748 }
 749
 750 static gboolean
 751 search (ModestWebkitMimePartView *self,
 752         const gchar *string)
 753 {
 754         ModestWebkitMimePartViewPrivate *priv;
 755
 756         g_return_val_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self), FALSE);
 757
 758         priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 759         g_free (priv->last_search);
 760         priv->last_search = g_strdup (string);
 761         webkit_web_view_mark_text_matches (WEBKIT_WEB_VIEW (self), priv->last_search, FALSE, 0);
 762         webkit_web_view_set_highlight_text_matches (WEBKIT_WEB_VIEW (self), TRUE);
 763         return webkit_web_view_search_text (WEBKIT_WEB_VIEW (self), priv->last_search, FALSE, TRUE, TRUE);
 764 }
 765
 766 static gboolean
 767 search_next (ModestWebkitMimePartView *self)
 768 {
 769         ModestWebkitMimePartViewPrivate *priv;
 770
 771         g_return_val_if_fail (MODEST_IS_WEBKIT_MIME_PART_VIEW (self), FALSE);
 772
 773         priv = MODEST_WEBKIT_MIME_PART_VIEW_GET_PRIVATE (self);
 774         webkit_web_view_mark_text_matches (WEBKIT_WEB_VIEW (self), priv->last_search, FALSE, 0);
 775         webkit_web_view_set_highlight_text_matches (WEBKIT_WEB_VIEW (self), TRUE);
 776         return webkit_web_view_search_text (WEBKIT_WEB_VIEW (self), priv->last_search, FALSE, TRUE, FALSE);
 777 }
 778
 779 static gboolean
 780 get_selection_area (ModestWebkitMimePartView *self,
 781                     gint *x, gint *y,
 782                     gint *width, gint *height)
 783 {
 784         return FALSE;
 785 }
 786
 787
 788 /* TNY MIME PART IMPLEMENTATION */
 789
 790 static void
 791 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 792 {
 793         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 794
 795         klass->get_part = modest_webkit_mime_part_view_get_part;
 796         klass->set_part = modest_webkit_mime_part_view_set_part;
 797         klass->clear = modest_webkit_mime_part_view_clear;
 798
 799         return;
 800 }
 801
 802 static TnyMimePart*
 803 modest_webkit_mime_part_view_get_part (TnyMimePartView *self)
 804 {
 805         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 806 }
 807
 808
 809 static TnyMimePart*
 810 modest_webkit_mime_part_view_get_part_default (TnyMimePartView *self)
 811 {
 812         return TNY_MIME_PART (get_part (MODEST_WEBKIT_MIME_PART_VIEW (self)));
 813 }
 814
 815 static void
 816 modest_webkit_mime_part_view_set_part (TnyMimePartView *self,
 817                                         TnyMimePart *part)
 818 {
 819         MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 820 }
 821
 822 static void
 823 modest_webkit_mime_part_view_set_part_default (TnyMimePartView *self,
 824                                                 TnyMimePart *part)
 825 {
 826         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 827
 828         set_part (MODEST_WEBKIT_MIME_PART_VIEW (self), part);
 829 }
 830
 831 static void
 832 modest_webkit_mime_part_view_clear (TnyMimePartView *self)
 833 {
 834         MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 835 }
 836
 837 static void
 838 modest_webkit_mime_part_view_clear_default (TnyMimePartView *self)
 839 {
 840         set_part (MODEST_WEBKIT_MIME_PART_VIEW (self), NULL);
 841 }
 842
 843 /* MODEST MIME PART VIEW IMPLEMENTATION */
 844
 845 static void
 846 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 847 {
 848         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 849
 850         klass->is_empty_func = modest_webkit_mime_part_view_is_empty;
 851         klass->get_view_images_func = modest_webkit_mime_part_view_get_view_images;
 852         klass->set_view_images_func = modest_webkit_mime_part_view_set_view_images;
 853         klass->has_external_images_func = modest_webkit_mime_part_view_has_external_images;
 854
 855         return;
 856 }
 857
 858 static gboolean
 859 modest_webkit_mime_part_view_is_empty (ModestMimePartView *self)
 860 {
 861         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 862 }
 863
 864 static gboolean
 865 modest_webkit_mime_part_view_get_view_images (ModestMimePartView *self)
 866 {
 867         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 868 }
 869
 870 static void
 871 modest_webkit_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 872 {
 873         MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 874 }
 875
 876 static gboolean
 877 modest_webkit_mime_part_view_has_external_images (ModestMimePartView *self)
 878 {
 879         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 880 }
 881
 882 static gboolean
 883 modest_webkit_mime_part_view_is_empty_default (ModestMimePartView *self)
 884 {
 885         return is_empty (MODEST_WEBKIT_MIME_PART_VIEW (self));
 886 }
 887
 888 static gboolean
 889 modest_webkit_mime_part_view_get_view_images_default (ModestMimePartView *self)
 890 {
 891         return get_view_images (MODEST_WEBKIT_MIME_PART_VIEW (self));
 892 }
 893
 894 static void
 895 modest_webkit_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 896 {
 897         set_view_images (MODEST_WEBKIT_MIME_PART_VIEW (self), view_images);
 898 }
 899
 900 static gboolean
 901 modest_webkit_mime_part_view_has_external_images_default (ModestMimePartView *self)
 902 {
 903         return has_external_images (MODEST_WEBKIT_MIME_PART_VIEW (self));
 904 }
 905
 906
 907 /* MODEST ZOOMABLE IMPLEMENTATION */
 908 static void
 909 modest_zoomable_init (gpointer g, gpointer iface_data)
 910 {
 911         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 912
 913         klass->get_zoom_func = modest_webkit_mime_part_view_get_zoom;
 914         klass->set_zoom_func = modest_webkit_mime_part_view_set_zoom;
 915         klass->zoom_minus_func = modest_webkit_mime_part_view_zoom_minus;
 916         klass->zoom_plus_func = modest_webkit_mime_part_view_zoom_plus;
 917
 918         return;
 919 }
 920
 921 static gdouble
 922 modest_webkit_mime_part_view_get_zoom (ModestZoomable *self)
 923 {
 924         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 925 }
 926
 927 static gdouble
 928 modest_webkit_mime_part_view_get_zoom_default (ModestZoomable *self)
 929 {
 930         return get_zoom (MODEST_WEBKIT_MIME_PART_VIEW (self));
 931 }
 932
 933 static void
 934 modest_webkit_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 935 {
 936         MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 937 }
 938
 939 static void
 940 modest_webkit_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 941 {
 942         set_zoom (MODEST_WEBKIT_MIME_PART_VIEW (self), value);
 943 }
 944
 945 static gboolean
 946 modest_webkit_mime_part_view_zoom_minus (ModestZoomable *self)
 947 {
 948         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 949 }
 950
 951 static gboolean
 952 modest_webkit_mime_part_view_zoom_minus_default (ModestZoomable *self)
 953 {
 954         /* operation not supported in ModestWebkitMimePartView */
 955         return FALSE;
 956 }
 957
 958 static gboolean
 959 modest_webkit_mime_part_view_zoom_plus (ModestZoomable *self)
 960 {
 961         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 962 }
 963
 964 static gboolean
 965 modest_webkit_mime_part_view_zoom_plus_default (ModestZoomable *self)
 966 {
 967         /* operation not supported in ModestWebkitMimePartView */
 968         return FALSE;
 969 }
 970
 971 /* ISEARCH VIEW IMPLEMENTATION */
 972 static void
 973 modest_isearch_view_init (gpointer g, gpointer iface_data)
 974 {
 975         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 976
 977         klass->search_func = modest_webkit_mime_part_view_search;
 978         klass->search_next_func = modest_webkit_mime_part_view_search_next;
 979         klass->get_selection_area_func = modest_webkit_mime_part_view_get_selection_area;
 980
 981         return;
 982 }
 983
 984 static gboolean
 985 modest_webkit_mime_part_view_search (ModestISearchView *self, const gchar *string)
 986 {
 987         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 988 }
 989
 990 static gboolean
 991 modest_webkit_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 992 {
 993         return search (MODEST_WEBKIT_MIME_PART_VIEW (self), string);
 994 }
 995
 996 static gboolean
 997 modest_webkit_mime_part_view_search_next(ModestISearchView *self)
 998 {
 999         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
1000 }
1001
1002 static gboolean
1003 modest_webkit_mime_part_view_search_next_default (ModestISearchView *self)
1004 {
1005         return search_next (MODEST_WEBKIT_MIME_PART_VIEW (self));
1006 }
1007
1008 static gboolean
1009 modest_webkit_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
1010                                                   gint *width, gint *height)
1011 {
1012         return MODEST_WEBKIT_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
1013 }
1014
1015 static gboolean
1016 modest_webkit_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
1017                                                           gint *width, gint *height)
1018 {
1019         return get_selection_area (MODEST_WEBKIT_MIME_PART_VIEW (self), x, y, width, height);
1020 }