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- /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- /* This is a dummy Net Context which the Image Library uses for network
- operations in lieu of an MWContext. It will be replaced by a true
- Net Context when the Network Library is modularized. */
-
- #include "dummy_nc.h"
- #include "il_strm.h"
- #include "if.h"
-
- typedef struct dum_TitleObsClosure {
- MWContext *context;
- XP_ObserverList obs_list;
- } dum_TitleObsClosure;
-
- extern void
- lo_view_title( MWContext *context, char *title_str );
-
- extern PRBool
- il_load_image(OPAQUE_CONTEXT *cx, char *image_url, NET_ReloadMethod cache_reload_policy);
-
-
- IL_NetContext *
- IL_NewDummyNetContext(MWContext *context, NET_ReloadMethod cache_reload_policy)
- {
- IL_NetContext *net_cx;
-
- net_cx = XP_NEW_ZAP(IL_NetContext);
- if (!net_cx)
- return NULL;
-
- net_cx->cx = context;
- net_cx->cache_reload_policy = cache_reload_policy;
-
- return net_cx;
- }
-
- void
- IL_DestroyDummyNetContext(IL_NetContext *net_cx)
- {
- XP_FREE(net_cx);
- }
-
- IL_NetContext *
- IL_CloneDummyNetContext(IL_NetContext *net_cx)
- {
- return IL_NewDummyNetContext((MWContext *)net_cx->cx,
- net_cx->cache_reload_policy);
- }
-
- #include "shist.h" /* For use with IL_AddReferer */
- #include "structs.h" /* For use with IL_AddReferer */
-
- void
- IL_AddReferer(IL_NetContext *net_cx, URL_Struct *urls)
- {
- MWContext *cx = net_cx->cx;
- History_entry *he = SHIST_GetCurrent (&cx->hist);
-
- if (urls->referer)
- XP_FREE (urls->referer);
- if (he && he->address)
- urls->referer = XP_STRDUP (he->origin_url
- ? he->origin_url
- : he->address);
- else
- urls->referer = 0;
- }
-
- void
- dum_TitleObserver(XP_Observable observerable, XP_ObservableMsg msg,
- void *message_data, void *closure){
-
- IL_MessageData *data = (IL_MessageData*)message_data;
- MWContext *context;
- dum_TitleObsClosure *title_obs_closure = (dum_TitleObsClosure *)closure;
- context = (MWContext *)title_obs_closure->context;
-
- switch(msg){
- case IL_DESCRIPTION:
- lo_view_title(context, data->description);
- break;
-
- case IL_IMAGE_DESTROYED:
- /* Remove ourself from the observer callback list. */
- XP_RemoveObserver(title_obs_closure->obs_list, dum_TitleObserver,
- title_obs_closure);
- XP_FREE(title_obs_closure);
- break;
-
- default:
- break;
- }
- return;
- }
-
-
- XP_ObserverList
- dum_NewTitleObserverList(MWContext *context)
- {
- XP_ObserverList title_obs_list; /* List of observer callbacks. */
- dum_TitleObsClosure *title_obs_closure; /* Closure data to be passed back
- to lo_ImageObserver. */
- NS_Error status;
-
- /* Create an XP_ObserverList for the title */
- status = XP_NewObserverList(NULL, &title_obs_list);
- if (status < 0) {
- return NULL;
- }
-
- /* Closure data for the image observer. */
- title_obs_closure = XP_NEW_ZAP(dum_TitleObsClosure);
- if (!title_obs_closure) {
- XP_DisposeObserverList(title_obs_list);
- return NULL;
- }
- title_obs_closure->context = context;
- title_obs_closure->obs_list = title_obs_list;
-
- /* Add the layout image observer to the observer list. */
- status = XP_AddObserver(title_obs_list, dum_TitleObserver, title_obs_closure);
- if (status < 0) {
- XP_DisposeObserverList(title_obs_list);
- XP_RemoveObserver(title_obs_closure->obs_list, dum_TitleObserver,
- title_obs_closure );
- XP_FREE(title_obs_closure);
- return NULL;
- }
-
- return title_obs_list;
- }
-
-
-
- /* This function only handles view_images. Note that the title observer
- created is only used to set the image dimensions and type in the
- title bar. */
-
- PRBool
- il_load_image(MWContext *cx, char *image_url, NET_ReloadMethod cache_reload_policy)
- {
- PRBool ret_val = PR_TRUE;
- XP_ObserverList obs_list;
- IL_NetContext *net_cx;
- IL_IRGB *trans_pixel;
- IL_ImageReq *image_req;
-
-
- /* Create a new observer list for the image's title. The destruction of this
- list is managed by the image library once we call IL_GetImage. */
- obs_list = dum_NewTitleObserverList(cx);
- if (!obs_list)
- return PR_FALSE;
-
- net_cx = IL_NewDummyNetContext(cx, cache_reload_policy);
- if (!net_cx) {
- XP_DisposeObserverList(obs_list);
- return PR_FALSE;
- }
-
- /* Determine whether to request a mask if this is a transparent image.
- In the case of a document backdrop, we ask the image library to fill
- in the transparent area with a solid color. For all other transparent
- images, we force the creation of a mask by passing in NULL. */
- if (cx->type == MWContextPostScript) {
- trans_pixel = XP_NEW_ZAP(IL_IRGB);
- if (trans_pixel)
- trans_pixel->red = trans_pixel->green = trans_pixel->blue = 0xff;
- }
- else if (cx->type == MWContextPrint) {
- trans_pixel = cx->transparent_pixel;
- }
- else {
- trans_pixel = NULL;
- }
-
- /* Fetch the image. */
- image_req = IL_GetImage(image_url, cx->img_cx, obs_list, trans_pixel, 0, 0, 0, net_cx);
- if (!image_req) {
- ret_val = PR_FALSE;
- }
-
- /* Destroy the transparent pixel if this is a PostScript context. */
- if ((cx->type == MWContextPostScript) && trans_pixel)
- XP_FREE(trans_pixel);
-
- /* The Image Library clones the dummy Net Context, so it safe to destroy
- it. */
- IL_DestroyDummyNetContext(net_cx);
-
- return ret_val;
- }
-