162 lines
5.4 KiB
C
162 lines
5.4 KiB
C
/*
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* This file is part of NetSurf, http://netsurf.sourceforge.net/
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* Licensed under the GNU General Public License,
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* http://www.opensource.org/licenses/gpl-license
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* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
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* Copyright 2003 Philip Pemberton <philpem@users.sourceforge.net>
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*/
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/** \file
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* Content handling (interface).
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*
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* The content functions manipulate struct contents, which correspond to URLs.
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*
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* Each content has a type. The type is used to call a specific implementation
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* of functions such as content_process_data().
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*
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* Contents have an associated set of users, which are informed by a callback
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* when the state of the content changes or something interesting happens.
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*
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* Optionally, contents may have instances (depending on type). Instances
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* represent copies of the same URL, for example if a page is open in two
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* windows, or a page contains the same image twice.
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*/
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#ifndef _NETSURF_DESKTOP_CONTENT_H_
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#define _NETSURF_DESKTOP_CONTENT_H_
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#include "libxml/HTMLparser.h"
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#include "netsurf/content/cache.h"
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#include "netsurf/content/fetch.h"
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#include "netsurf/content/other.h"
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#include "netsurf/css/css.h"
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#include "netsurf/render/box.h"
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#include "netsurf/render/font.h"
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#include "netsurf/render/html.h"
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#ifdef riscos
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#include "netsurf/riscos/gif.h"
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#include "netsurf/riscos/jpeg.h"
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#include "netsurf/riscos/plugin.h"
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#include "netsurf/riscos/png.h"
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#endif
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/** The type of a content. */
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typedef enum {
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CONTENT_HTML,
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CONTENT_TEXTPLAIN,
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#ifdef riscos
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CONTENT_JPEG,
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#endif
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CONTENT_CSS,
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#ifdef riscos
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CONTENT_PNG,
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CONTENT_GIF,
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CONTENT_PLUGIN,
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#endif
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CONTENT_OTHER,
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CONTENT_UNKNOWN /**< content-type not received yet */
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} content_type;
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/** Used in callbacks to indicate what has occurred. */
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typedef enum {
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CONTENT_MSG_LOADING, /**< fetching or converting */
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CONTENT_MSG_READY, /**< may be displayed */
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CONTENT_MSG_DONE, /**< finished */
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CONTENT_MSG_ERROR, /**< error occurred */
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CONTENT_MSG_STATUS, /**< new status string */
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CONTENT_MSG_REDIRECT /**< replacement URL */
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} content_msg;
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/** Linked list of users of a content. */
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struct content_user
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{
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void (*callback)(content_msg msg, struct content *c, void *p1,
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void *p2, const char *error);
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void *p1;
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void *p2;
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struct content_user *next;
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};
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/** Corresponds to a single URL. */
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struct content {
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char *url; /**< URL, in standard form as from url_join. */
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content_type type; /**< Type of content. */
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char *mime_type; /**< Original MIME type of data, or 0. */
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enum {
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CONTENT_STATUS_TYPE_UNKNOWN, /**< Type not yet known. */
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CONTENT_STATUS_LOADING, /**< Content is being fetched or
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converted and is not safe to display. */
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CONTENT_STATUS_READY, /**< Some parts of content still being
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loaded, but can be displayed. */
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CONTENT_STATUS_DONE /**< All finished. */
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} status; /**< Current status. */
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unsigned long width, height; /**< Dimensions, if applicable. */
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unsigned long available_width; /**< Available width (eg window width). */
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/** Data dependent on type. */
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union {
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struct content_html_data html;
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struct content_css_data css;
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#ifdef riscos
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struct content_jpeg_data jpeg;
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struct content_png_data png;
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struct content_gif_data gif;
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struct content_plugin_data plugin;
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#endif
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struct content_other_data other;
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} data;
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struct cache_entry *cache; /**< Used by cache, 0 if not cached. */
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unsigned long size; /**< Estimated size of all data
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associated with this content. */
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char *title; /**< Title for browser window. */
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unsigned int active; /**< Number of child fetches or
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conversions currently in progress. */
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int error; /**< Non-0 if an error has occurred. */
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struct content_user *user_list; /**< List of users. */
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char status_message[80]; /**< Text for status bar. */
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struct fetch *fetch; /**< Associated fetch, or 0. */
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unsigned long fetch_size; /**< Amount of data fetched so far. */
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unsigned long total_size; /**< Total data size, 0 if unknown. */
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};
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struct browser_window;
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content_type content_lookup(const char *mime_type);
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struct content * content_create(char *url);
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void content_set_type(struct content *c, content_type type, char *mime_type);
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void content_process_data(struct content *c, char *data, unsigned long size);
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void content_convert(struct content *c, unsigned long width, unsigned long height);
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void content_revive(struct content *c, unsigned long width, unsigned long height);
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void content_reformat(struct content *c, unsigned long width, unsigned long height);
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void content_destroy(struct content *c);
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void content_redraw(struct content *c, long x, long y,
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unsigned long width, unsigned long height);
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void content_add_user(struct content *c,
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void (*callback)(content_msg msg, struct content *c, void *p1,
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void *p2, const char *error),
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void *p1, void *p2);
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void content_remove_user(struct content *c,
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void (*callback)(content_msg msg, struct content *c, void *p1,
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void *p2, const char *error),
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void *p1, void *p2);
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void content_broadcast(struct content *c, content_msg msg, char *error);
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void content_add_instance(struct content *c, struct browser_window *bw,
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struct content *page, struct box *box,
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struct object_params *params, void **state);
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void content_remove_instance(struct content *c, struct browser_window *bw,
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struct content *page, struct box *box,
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struct object_params *params, void **state);
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void content_reshape_instance(struct content *c, struct browser_window *bw,
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struct content *page, struct box *box,
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struct object_params *params, void **state);
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#endif
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