From 3612f22ea5fbb0ecdb1699decbe6a885e5f90434 Mon Sep 17 00:00:00 2001 From: James Bursa Date: Sat, 29 Jan 2005 14:11:21 +0000 Subject: [project @ 2005-01-29 14:11:21 by bursa] Remove obsolete file. svn path=/import/netsurf/; revision=1474 --- content/overview | 56 -------------------------------------------------------- 1 file changed, 56 deletions(-) delete mode 100644 content/overview (limited to 'content') diff --git a/content/overview b/content/overview deleted file mode 100644 index f58a995c1..000000000 --- a/content/overview +++ /dev/null @@ -1,56 +0,0 @@ -NetSurf fetch, cache, and content system -======================================== - -There is a one-to-one mapping between URLs and content structures. - -The resource at a URL may be required for two reasons: - -1. The user requests a URL in the GUI by entering it or following a link. -2. A page contains an object (such as an image). - -When a URL is required, call fetchcache() as follows: - - c = fetchcache(url, referer, callback, p1, p2, width, height); - -p1 and p2 are the callers private pointers used to identify the resource, and -they are passed to the callback. The triple (callback, p1, p2) must be unique. -The call returns immediately with a struct content. The structure may be in the -following states (c->status): - - CONTENT_STATUS_TYPE_UNKNOWN -- the MIME type of the resource has not been - determined yet. - - CONTENT_STATUS_LOADING -- the resource is being fetched or converted, and can - not be displayed. - - CONTENT_STATUS_READY -- the resource is still loading, but may be displayed. - - CONTENT_STATUS_DONE -- the resource has loaded completely. - -States may only follow in the above order (but some may be skipped). The -callback function is called when the state changes or at other times as follows: - - CONTENT_MSG_LOADING -- state has changed from CONTENT_STATUS_TYPE_UNKNOWN to - CONTENT_STATUS_LOADING. If the type is not acceptable content_remove_user() - should be called (see below). - - CONTENT_MSG_READY -- state has changed to CONTENT_STATUS_READY. - - CONTENT_MSG_DONE -- state has changed to CONTENT_STATUS_DONE. - - CONTENT_MSG_ERROR -- a fatal error with the resource has occurred. The error - message is in the callback parameter. The content structure will be - destroyed after this message and must not be used. - - CONTENT_MSG_STATUS -- the content structure's status message has changed. - - CONTENT_MSG_REDIRECT -- the server has sent a replacement URL for the content. - This message may only occur in CONTENT_STATUS_TYPE_UNKNOWN. The content - will be destroyed and must not be used. - -If at any time the resource is no longer required, call content_remove_user(): - - content_remove_user(c, callback, p1, p2); - -with the same callback, p1, p2 as passed to fetchcache(). - -- cgit v1.2.3