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netsurf/desktop/browser.c
John Mark Bell 23fb72ea6b The core code has always assumed a locale of "C". 
Do not change the locale globally, else things will break in weird and 
wonderful ways.

Introduce utils/locale.[ch], which provide locale-specific wrappers for various 
functions (currently just the <ctype.h> ones).

Fix up the few places I can see that actually require that the underlying 
locale is paid attention to.

Some notes:

  1) The GTK frontend code has not been touched. It is possible that reading of 
     numeric values (e.g. from the preferences dialogue) may break with this 
     change, particularly in locales that use something other than '.' as their
     decimal separator.
  2) The search code is left unchanged (i.e. assuming a locale of "C"). 
     This may break case insensitive matching of non-ASCII characters. 
     I doubt that ever actually worked, anyway. In future, it should use
     Unicode case conversion to achieve the same effect.
  3) The text input handling in the core makes use of isspace() to detect
     word boundaries. This is fine for western languages (even in the C locale,
     which it's currently assuming). It will, however, break for CJK et. al. 
     (this has always been the case, rather than being a new issue)
  4) text-transform uses locale-specific variants of to{lower,upper}. In future
     this should probably be performing Unicode case conversion. This is the
     only part of the core code that makes use of locale information.

In future, if you require locale-specific behaviour, do the following:

  setlocale(LC_<whatever>, "");
  <your operation(s) here>
  setlocale(LC_<whatever>, "C");

  The first setlocale will change the current locale to the native environment.
  The second setlocale will reset the current locale to "C".
  Any value other than "" or "C" is probably a bug, unless there's a really
  good reason for it.

In the long term, it is expected that all locale-dependent code will reside in 
platform frontends -- the core being wholly locale agnostic (though assuming 
"C" for things like decimal separators).


svn path=/trunk/netsurf/; revision=4153
2008-05-13 14:37:44 +00:00

2676 lines
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/*
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2006 James Bursa <bursa@users.sourceforge.net>
* Copyright 2004 Andrew Timmins <atimmins@blueyonder.co.uk>
* Copyright 2004 John Tytgat <John.Tytgat@aaug.net>
* Copyright 2006 Richard Wilson <info@tinct.net>
* Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Browser window creation and manipulation (implementation).
*/
#include <assert.h>
#include <limits.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/select.h>
#include "curl/curl.h"
#include "utils/config.h"
#include "content/fetch.h"
#include "content/fetchcache.h"
#include "content/urldb.h"
#include "css/css.h"
#ifdef WITH_AUTH
#include "desktop/401login.h"
#endif
#include "desktop/browser.h"
#include "desktop/frames.h"
#include "desktop/history_core.h"
#include "desktop/gui.h"
#include "desktop/options.h"
#include "desktop/selection.h"
#include "desktop/textinput.h"
#include "render/box.h"
#include "render/form.h"
#include "render/font.h"
#include "render/imagemap.h"
#include "render/layout.h"
#include "render/textplain.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/talloc.h"
#include "utils/url.h"
#include "utils/utils.h"
#include "utils/utf8.h"
/** browser window which is being redrawn. Valid only during redraw. */
struct browser_window *current_redraw_browser;
/** fake content for <a> being saved as a link */
struct content browser_window_href_content;
/** one or more windows require a reformat */
bool browser_reformat_pending;
/** maximum frame depth */
#define FRAME_DEPTH 8
static void browser_window_go_post(struct browser_window *bw,
const char *url, char *post_urlenc,
struct form_successful_control *post_multipart,
bool history_add, const char *referer, bool download,
bool verifiable, const char *parent_url);
static void browser_window_callback(content_msg msg, struct content *c,
intptr_t p1, intptr_t p2, union content_msg_data data);
static void browser_window_refresh(void *p);
static bool browser_window_check_throbber(struct browser_window *bw);
static void browser_window_convert_to_download(struct browser_window *bw);
static void browser_window_start_throbber(struct browser_window *bw);
static void browser_window_stop_throbber(struct browser_window *bw);
static void browser_window_set_status(struct browser_window *bw,
const char *text);
static void browser_window_set_pointer(struct gui_window *g,
gui_pointer_shape shape);
static void download_window_callback(fetch_msg msg, void *p, const void *data,
unsigned long size);
static void browser_window_destroy_children(struct browser_window *bw);
static void browser_window_destroy_internal(struct browser_window *bw);
static void browser_window_set_scale_internal(struct browser_window *bw,
float scale);
static struct browser_window *browser_window_find_target(
struct browser_window *bw, const char *target, bool new_window);
static void browser_window_find_target_internal(struct browser_window *bw,
const char *target, int depth, struct browser_window *page,
int *rdepth, struct browser_window **bw_target);
static void browser_window_mouse_action_html(struct browser_window *bw,
browser_mouse_state mouse, int x, int y);
static void browser_window_mouse_action_text(struct browser_window *bw,
browser_mouse_state mouse, int x, int y);
static void browser_window_mouse_track_html(struct browser_window *bw,
browser_mouse_state mouse, int x, int y);
static void browser_window_mouse_track_text(struct browser_window *bw,
browser_mouse_state mouse, int x, int y);
static const char *browser_window_scrollbar_click(struct browser_window *bw,
browser_mouse_state mouse, struct box *box,
int box_x, int box_y, int x, int y);
static void browser_radio_set(struct content *content,
struct form_control *radio);
static gui_pointer_shape get_pointer_shape(css_cursor cursor);
static bool browser_window_nearer_text_box(struct box *box, int bx, int by,
int x, int y, int dir, struct box **nearest, int *tx, int *ty,
int *nr_xd, int *nr_yd);
static bool browser_window_nearest_text_box(struct box *box, int bx, int by,
int fx, int fy, int x, int y, int dir, struct box **nearest,
int *tx, int *ty, int *nr_xd, int *nr_yd);
static struct box *browser_window_pick_text_box(struct browser_window *bw,
int x, int y, int dir, int *dx, int *dy);
static void browser_window_page_drag_start(struct browser_window *bw,
int x, int y);
static void browser_window_scroll_box(struct browser_window *bw,
struct box *box, int scroll_x, int scroll_y);
/**
* Create and open a new browser window with the given page.
*
* \param url URL to start fetching in the new window (copied)
* \param clone The browser window to clone
* \param referer The referring uri (copied), or 0 if none
*/
struct browser_window *browser_window_create(const char *url,
struct browser_window *clone,
const char *referer, bool history_add)
{
struct browser_window *bw;
assert(clone || history_add);
if ((bw = calloc(1, sizeof *bw)) == NULL) {
warn_user("NoMemory", 0);
return NULL;
}
/* Initialise common parts */
browser_window_initialise_common(bw, clone);
/* window characteristics */
bw->browser_window_type = BROWSER_WINDOW_NORMAL;
bw->scrolling = SCROLLING_YES;
bw->border = true;
bw->no_resize = true;
/* gui window */
if ((bw->window = gui_create_browser_window(bw, clone)) == NULL) {
browser_window_destroy(bw);
return NULL;
}
if (url)
browser_window_go(bw, url, referer, history_add);
return bw;
}
/**
* Initialise common parts of a browser window
*
* \param bw The window to initialise
* \param clone The window to clone, or NULL if none
*/
void browser_window_initialise_common(struct browser_window *bw,
struct browser_window *clone)
{
assert(bw);
if (!clone)
bw->history = history_create();
else
bw->history = history_clone(clone->history);
/* window characteristics */
bw->sel = selection_create(bw);
bw->refresh_interval = -1;
bw->reformat_pending = false;
bw->drag_type = DRAGGING_NONE;
bw->scale = (float) option_scale / 100.0;
}
/**
* Start fetching a page in a browser window.
*
* \param bw browser window
* \param url URL to start fetching (copied)
* \param referer the referring uri (copied), or 0 if none
*
* Any existing fetches in the window are aborted.
*/
void browser_window_go(struct browser_window *bw, const char *url,
const char *referer, bool history_add)
{
/* All fetches passing through here are verifiable
* (i.e are the result of user action) */
browser_window_go_post(bw, url, 0, 0, history_add, referer,
false, true, referer);
}
/**
* Start fetching a page in a browser window.
*
* \param bw browser window
* \param url URL to start fetching (copied)
* \param referer the referring uri (copied), or 0 if none
*
* Any existing fetches in the window are aborted.
*/
void browser_window_go_unverifiable(struct browser_window *bw,
const char *url, const char *referer, bool history_add)
{
/* All fetches passing through here are unverifiable
* (i.e are not the result of user action) */
browser_window_go_post(bw, url, 0, 0, history_add, referer,
false, false, referer);
}
/**
* Start fetching a page in a browser window, POSTing form data.
*
* \param bw browser window
* \param url URL to start fetching (copied)
* \param post_urlenc url encoded post data, or 0 if none
* \param post_multipart multipart post data, or 0 if none
* \param history_add add to window history
* \param referer the referring uri (copied), or 0 if none
* \param download download, rather than render the uri
* \param verifiable this transaction is verifiable
* \param parent_url URL of fetch which spawned this one (copied),
* or 0 if none
*
* Any existing fetches in the window are aborted.
*
* If post_urlenc and post_multipart are 0 the url is fetched using GET.
*
* The page is not added to the window history if add_history is false. This
* should be used when returning to a page in the window history.
*/
void browser_window_go_post(struct browser_window *bw, const char *url,
char *post_urlenc,
struct form_successful_control *post_multipart,
bool history_add, const char *referer, bool download,
bool verifiable, const char *parent_url)
{
struct content *c;
char *url2;
char *fragment;
url_func_result res;
char url_buf[256];
int depth = 0;
struct browser_window *cur;
int width, height;
LOG(("bw %p, url %s", bw, url));
assert(bw);
assert(url);
/* don't allow massively nested framesets */
for (cur = bw; cur->parent; cur = cur->parent)
depth++;
if (depth > FRAME_DEPTH) {
LOG(("frame depth too high."));
return;
}
res = url_normalize(url, &url2);
if (res != URL_FUNC_OK) {
LOG(("failed to normalize url %s", url));
return;
}
/* check we can actually handle this URL */
if (!fetch_can_fetch(url2)) {
gui_launch_url(url2);
free(url2);
return;
}
free(bw->frag_id);
bw->frag_id = NULL;
/* find any fragment identifier on end of URL */
res = url_fragment(url2, &fragment);
if (res == URL_FUNC_NOMEM) {
free(url2);
warn_user("NoMemory", 0);
return;
} else if (res == URL_FUNC_OK) {
bool same_url = false;
bw->frag_id = fragment;
/* Compare new URL with existing one (ignoring fragments) */
if (bw->current_content && bw->current_content->url) {
res = url_compare(bw->current_content->url, url2,
true, &same_url);
if (res == URL_FUNC_NOMEM) {
free(url2);
warn_user("NoMemory", 0);
return;
} else if (res == URL_FUNC_FAILED) {
same_url = false;
}
}
/* if we're simply moving to another ID on the same page,
* don't bother to fetch, just update the window.
*/
if (same_url && !post_urlenc && !post_multipart &&
!strchr(url2, '?')) {
free(url2);
browser_window_update(bw, false);
snprintf(url_buf, sizeof url_buf, "%s#%s",
bw->current_content->url, bw->frag_id);
url_buf[sizeof url_buf - 1] = 0;
gui_window_set_url(bw->window, url_buf);
return;
}
}
browser_window_stop(bw);
browser_window_remove_caret(bw);
browser_window_destroy_children(bw);
gui_window_get_dimensions(bw->window, &width, &height, true);
LOG(("Loading '%s' width %i, height %i", url2, width, height));
browser_window_set_status(bw, messages_get("Loading"));
bw->history_add = history_add;
c = fetchcache(url2, browser_window_callback, (intptr_t) bw, 0,
width, height, false,
post_urlenc, post_multipart, verifiable, download);
free(url2);
if (!c) {
browser_window_set_status(bw, messages_get("NoMemory"));
warn_user("NoMemory", 0);
return;
}
bw->loading_content = c;
browser_window_start_throbber(bw);
if (referer && referer != bw->referer) {
free(bw->referer);
bw->referer = strdup(referer);
}
bw->download = download;
fetchcache_go(c, referer, browser_window_callback,
(intptr_t) bw, 0, width, height,
post_urlenc, post_multipart, verifiable, parent_url);
}
/**
* Callback for fetchcache() for browser window fetches.
*/
void browser_window_callback(content_msg msg, struct content *c,
intptr_t p1, intptr_t p2, union content_msg_data data)
{
struct browser_window *bw = (struct browser_window *) p1;
char url[256];
switch (msg) {
case CONTENT_MSG_LOADING:
assert(bw->loading_content == c);
if (c->type == CONTENT_OTHER)
browser_window_convert_to_download(bw);
#ifdef WITH_THEME_INSTALL
else if (c->type == CONTENT_THEME) {
theme_install_start(c);
bw->loading_content = 0;
content_remove_user(c, browser_window_callback,
(intptr_t) bw, 0);
browser_window_stop_throbber(bw);
}
#endif
else {
if (bw->frag_id)
snprintf(url, sizeof url, "%s#%s",
c->url, bw->frag_id);
else
snprintf(url, sizeof url, "%s", c->url);
url[sizeof url - 1] = 0;
gui_window_set_url(bw->window, url);
bw->refresh_interval = -1;
browser_window_set_status(bw, c->status_message);
}
break;
case CONTENT_MSG_READY:
assert(bw->loading_content == c);
if (bw->current_content) {
if (bw->current_content->status ==
CONTENT_STATUS_READY ||
bw->current_content->status ==
CONTENT_STATUS_DONE)
content_close(bw->current_content);
content_remove_user(bw->current_content,
browser_window_callback,
(intptr_t) bw, 0);
}
bw->current_content = c;
bw->loading_content = NULL;
browser_window_remove_caret(bw);
bw->scrolling_box = NULL;
gui_window_new_content(bw->window);
if (bw->frag_id)
snprintf(url, sizeof url, "%s#%s", c->url, bw->frag_id);
else
snprintf(url, sizeof url, "%s", c->url);
url[sizeof url - 1] = 0;
gui_window_set_url(bw->window, url);
browser_window_update(bw, true);
content_open(c, bw, 0, 0, 0, 0);
browser_window_set_status(bw, c->status_message);
/* history */
if (bw->history_add && bw->history) {
history_add(bw->history, c, bw->frag_id);
if (urldb_add_url(c->url)) {
urldb_set_url_title(c->url,
c->title ? c->title : c->url);
urldb_update_url_visit_data(c->url);
urldb_set_url_content_type(c->url,
c->type);
/* This is safe as we've just
* added the URL */
global_history_add(
urldb_get_url(c->url));
}
}
/* text selection */
if (c->type == CONTENT_HTML)
selection_init(bw->sel,
bw->current_content->data.html.layout);
if (c->type == CONTENT_TEXTPLAIN)
selection_init(bw->sel, NULL);
/* frames */
if (c->type == CONTENT_HTML && c->data.html.frameset)
browser_window_create_frameset(bw,
c->data.html.frameset);
if (c->type == CONTENT_HTML && c->data.html.iframe)
browser_window_create_iframes(bw, c->data.html.iframe);
break;
case CONTENT_MSG_DONE:
assert(bw->current_content == c);
browser_window_update(bw, false);
browser_window_set_status(bw, c->status_message);
browser_window_stop_throbber(bw);
history_update(bw->history, c);
hotlist_visited(c);
free(bw->referer);
bw->referer = 0;
if (bw->refresh_interval != -1)
schedule(bw->refresh_interval,
browser_window_refresh, bw);
break;
case CONTENT_MSG_ERROR:
browser_window_set_status(bw, data.error);
/* Only warn the user about errors in top-level windows */
if (bw->browser_window_type == BROWSER_WINDOW_NORMAL)
warn_user(data.error, 0);
if (c == bw->loading_content)
bw->loading_content = 0;
else if (c == bw->current_content) {
bw->current_content = 0;
browser_window_remove_caret(bw);
bw->scrolling_box = NULL;
selection_init(bw->sel, NULL);
}
browser_window_stop_throbber(bw);
free(bw->referer);
bw->referer = 0;
break;
case CONTENT_MSG_STATUS:
browser_window_set_status(bw, c->status_message);
break;
case CONTENT_MSG_REFORMAT:
if (c == bw->current_content &&
c->type == CONTENT_HTML) {
/* reposition frames */
if (c->data.html.frameset)
browser_window_recalculate_frameset(bw);
/* reflow iframe positions */
if (c->data.html.iframe)
browser_window_recalculate_iframes(bw);
/* box tree may have changed, need to relabel */
selection_reinit(bw->sel, c->data.html.layout);
}
if (bw->move_callback)
bw->move_callback(bw, bw->caret_p);
browser_window_update(bw, false);
break;
case CONTENT_MSG_REDRAW:
gui_window_update_box(bw->window, &data);
break;
case CONTENT_MSG_NEWPTR:
bw->loading_content = c;
if (data.new_url) {
/* Replacement URL too, so check for new fragment */
char *fragment;
url_func_result res;
/* Remove any existing fragment */
free(bw->frag_id);
bw->frag_id = NULL;
/* Extract new one, if any */
res = url_fragment(data.new_url, &fragment);
if (res == URL_FUNC_OK) {
/* Save for later use */
bw->frag_id = fragment;
}
/* Ignore memory exhaustion here -- it'll simply result
* in the window being scrolled to the top rather than
* to the fragment. That's acceptable, given that it's
* likely that more important things will complain
* about memory shortage. */
}
break;
case CONTENT_MSG_LAUNCH:
assert(data.launch_url != NULL);
bw->loading_content = NULL;
gui_launch_url(data.launch_url);
browser_window_stop_throbber(bw);
free(bw->referer);
bw->referer = 0;
break;
#ifdef WITH_AUTH
case CONTENT_MSG_AUTH:
gui_401login_open(bw, c, data.auth_realm);
if (c == bw->loading_content)
bw->loading_content = 0;
else if (c == bw->current_content) {
bw->current_content = 0;
browser_window_remove_caret(bw);
bw->scrolling_box = NULL;
selection_init(bw->sel, NULL);
}
browser_window_stop_throbber(bw);
free(bw->referer);
bw->referer = 0;
break;
#endif
#ifdef WITH_SSL
case CONTENT_MSG_SSL:
gui_cert_verify(bw, c, data.ssl.certs, data.ssl.num);
if (c == bw->loading_content)
bw->loading_content = 0;
else if (c == bw->current_content) {
bw->current_content = 0;
browser_window_remove_caret(bw);
bw->scrolling_box = NULL;
selection_init(bw->sel, NULL);
}
browser_window_stop_throbber(bw);
free(bw->referer);
bw->referer = 0;
break;
#endif
case CONTENT_MSG_REFRESH:
bw->refresh_interval = data.delay * 100;
break;
default:
assert(0);
}
}
/**
* Transfer the loading_content to a new download window.
*/
void browser_window_convert_to_download(struct browser_window *bw)
{
struct gui_download_window *download_window;
struct content *c = bw->loading_content;
struct fetch *fetch;
assert(c);
fetch = c->fetch;
if (fetch) {
/* create download window */
download_window = gui_download_window_create(c->url,
c->mime_type, fetch, c->total_size);
if (download_window) {
/* extract fetch from content */
c->fetch = 0;
c->fresh = false;
fetch_change_callback(fetch, download_window_callback,
download_window);
}
} else {
/* must already be a download window for this fetch */
/** \todo open it at top of stack */
}
/* remove content from browser window */
bw->loading_content = 0;
content_remove_user(c, browser_window_callback, (intptr_t) bw, 0);
browser_window_stop_throbber(bw);
}
/**
* Handle meta http-equiv refresh time elapsing by loading a new page.
*
* \param p browser window to refresh with new page
*/
void browser_window_refresh(void *p)
{
struct browser_window *bw = p;
bool history_add = true;
assert(bw->current_content &&
(bw->current_content->status == CONTENT_STATUS_READY ||
bw->current_content->status == CONTENT_STATUS_DONE));
/* Ignore if the refresh URL has gone
* (may happen if a fetch error occurred) */
if (!bw->current_content->refresh)
return;
/* mark this content as invalid so it gets flushed from the cache */
bw->current_content->fresh = false;
if ((bw->current_content->url) &&
(bw->current_content->refresh) &&
(!strcmp(bw->current_content->url,
bw->current_content->refresh)))
history_add = false;
browser_window_go_unverifiable(bw, bw->current_content->refresh,
bw->current_content->url, history_add);
}
/**
* Start the busy indicator.
*
* \param bw browser window
*/
void browser_window_start_throbber(struct browser_window *bw)
{
bw->throbbing = true;
while (bw->parent)
bw = bw->parent;
gui_window_start_throbber(bw->window);
}
/**
* Stop the busy indicator.
*
* \param bw browser window
*/
void browser_window_stop_throbber(struct browser_window *bw)
{
bw->throbbing = false;
while (bw->parent)
bw = bw->parent;
if (!browser_window_check_throbber(bw))
gui_window_stop_throbber(bw->window);
}
bool browser_window_check_throbber(struct browser_window *bw)
{
int children, index;
if (bw->throbbing)
return true;
if (bw->children) {
children = bw->rows * bw->cols;
for (index = 0; index < children; index++) {
if (browser_window_check_throbber(&bw->children[index]))
return true;
}
}
if (bw->iframes) {
for (index = 0; index < bw->iframe_count; index++) {
if (browser_window_check_throbber(&bw->iframes[index]))
return true;
}
}
return false;
}
/**
* Redraw browser window, set extent to content, and update title.
*
* \param bw browser_window
* \param scroll_to_top move view to top of page
*/
void browser_window_update(struct browser_window *bw,
bool scroll_to_top)
{
struct box *pos;
int x, y;
if (!bw->current_content)
return;
if (bw->current_content->title != NULL) {
gui_window_set_title(bw->window, bw->current_content->title);
} else
gui_window_set_title(bw->window, bw->current_content->url);
gui_window_update_extent(bw->window);
if (scroll_to_top)
gui_window_set_scroll(bw->window, 0, 0);
/* todo: don't do this if the user has scrolled */
/* if frag_id exists, then try to scroll to it */
if (bw->frag_id && bw->current_content->type == CONTENT_HTML) {
if ((pos = box_find_by_id(bw->current_content->data.html.layout, bw->frag_id)) != 0) {
box_coords(pos, &x, &y);
gui_window_set_scroll(bw->window, x, y);
}
}
gui_window_redraw_window(bw->window);
}
/**
* Stop all fetching activity in a browser window.
*
* \param bw browser window
*/
void browser_window_stop(struct browser_window *bw)
{
int children, index;
if (bw->loading_content) {
content_remove_user(bw->loading_content,
browser_window_callback, (intptr_t) bw, 0);
bw->loading_content = 0;
}
if (bw->current_content &&
bw->current_content->status != CONTENT_STATUS_DONE) {
assert(bw->current_content->status == CONTENT_STATUS_READY);
content_stop(bw->current_content,
browser_window_callback, (intptr_t) bw, 0);
}
schedule_remove(browser_window_refresh, bw);
if (bw->children) {
children = bw->rows * bw->cols;
for (index = 0; index < children; index++)
browser_window_stop(&bw->children[index]);
}
if (bw->iframes) {
children = bw->iframe_count;
for (index = 0; index < children; index++)
browser_window_stop(&bw->iframes[index]);
}
browser_window_stop_throbber(bw);
}
/**
* Reload the page in a browser window.
*
* \param bw browser window
* \param all whether to reload all objects associated with the page
*/
void browser_window_reload(struct browser_window *bw, bool all)
{
struct content *c;
unsigned int i;
if (!bw->current_content || bw->loading_content)
return;
if (all && bw->current_content->type == CONTENT_HTML) {
c = bw->current_content;
/* invalidate objects */
for (i = 0; i != c->data.html.object_count; i++) {
if (c->data.html.object[i].content)
c->data.html.object[i].content->fresh = false;
}
/* invalidate stylesheets */
for (i = STYLESHEET_START; i != c->data.html.stylesheet_count;
i++) {
if (c->data.html.stylesheet_content[i])
c->data.html.stylesheet_content[i]->fresh =
false;
}
}
bw->current_content->fresh = false;
browser_window_go_post(bw, bw->current_content->url, 0, 0,
false, 0, false, true, 0);
}
/**
* Change the status bar of a browser window.
*
* \param bw browser window
* \param text new status text (copied)
*/
void browser_window_set_status(struct browser_window *bw, const char *text)
{
while (bw->parent)
bw = bw->parent;
gui_window_set_status(bw->window, text);
}
/**
* Change the shape of the mouse pointer
*
* \param shape shape to use
*/
void browser_window_set_pointer(struct gui_window *g, gui_pointer_shape shape)
{
gui_window_set_pointer(g, shape);
}
/**
* Close and destroy a browser window.
*
* \param bw browser window
*/
void browser_window_destroy(struct browser_window *bw)
{
/* can't destoy child windows on their own */
assert(!bw->parent);
/* destroy */
browser_window_destroy_internal(bw);
free(bw);
}
/**
* Close and destroy all child browser window.
*
* \param bw browser window
*/
void browser_window_destroy_children(struct browser_window *bw)
{
int i;
if (bw->children) {
for (i = 0; i < (bw->rows * bw->cols); i++)
browser_window_destroy_internal(&bw->children[i]);
free(bw->children);
bw->children = NULL;
bw->rows = 0;
bw->cols = 0;
}
if (bw->iframes) {
for (i = 0; i < bw->iframe_count; i++)
browser_window_destroy_internal(&bw->iframes[i]);
free(bw->iframes);
bw->iframes = NULL;
bw->iframe_count = 0;
}
}
/**
* Release all memory associated with a browser window.
*
* \param bw browser window
*/
void browser_window_destroy_internal(struct browser_window *bw)
{
assert(bw);
LOG(("Destroying window"));
if ((bw->children) || (bw->iframes))
browser_window_destroy_children(bw);
if (bw->loading_content) {
content_remove_user(bw->loading_content,
browser_window_callback, (intptr_t) bw, 0);
bw->loading_content = 0;
}
if (bw->current_content) {
if (bw->current_content->status == CONTENT_STATUS_READY ||
bw->current_content->status ==
CONTENT_STATUS_DONE)
content_close(bw->current_content);
content_remove_user(bw->current_content,
browser_window_callback, (intptr_t) bw, 0);
bw->current_content = 0;
}
schedule_remove(browser_window_refresh, bw);
selection_destroy(bw->sel);
history_destroy(bw->history);
gui_window_destroy(bw->window);
free(bw->name);
free(bw->frag_id);
}
/**
* Returns the browser window that is responsible for the child.
*
* \param bw The browser window to find the owner of
* \return the browser window's owner
*/
struct browser_window *browser_window_owner(struct browser_window *bw)
{
/* an iframe's parent is just the parent window */
if (bw->browser_window_type == BROWSER_WINDOW_IFRAME)
return bw->parent;
/* the parent of a frameset is either a NORMAL window or an IFRAME */
while (bw->parent) {
switch (bw->browser_window_type) {
case BROWSER_WINDOW_NORMAL:
case BROWSER_WINDOW_IFRAME:
return bw;
case BROWSER_WINDOW_FRAME:
case BROWSER_WINDOW_FRAMESET:
bw = bw->parent;
break;
}
}
return bw;
}
/**
* Reformat a browser window contents to a new width or height.
*
* \param bw the browser window to reformat
* \param width new width
* \param height new height
*/
void browser_window_reformat(struct browser_window *bw, int width, int height)
{
struct content *c = bw->current_content;
if (!c)
return;
content_reformat(c, width / bw->scale, height / bw->scale);
}
/**
* Sets the scale of a browser window
*
* \param bw The browser window to scale
* \param scale The new scale
* \param all Scale all windows in the tree (ie work up aswell as down)
*/
void browser_window_set_scale(struct browser_window *bw, float scale, bool all)
{
while (bw->parent && all)
bw = bw->parent;
browser_window_set_scale_internal(bw, scale);
if (bw->parent)
bw = bw->parent;
browser_window_recalculate_frameset(bw);
}
void browser_window_set_scale_internal(struct browser_window *bw, float scale)
{
int i;
struct content *c;
if (fabs(bw->scale-scale) < 0.0001)
return;
bw->scale = scale;
c = bw->current_content;
if (c) {
if (!content_can_reformat(c)) {
browser_window_update(bw, false);
} else {
bw->reformat_pending = true;
browser_reformat_pending = true;
}
}
gui_window_set_scale(bw->window, scale);
for (i = 0; i < (bw->cols * bw->rows); i++)
browser_window_set_scale_internal(&bw->children[i], scale);
for (i = 0; i < bw->iframe_count; i++)
browser_window_set_scale_internal(&bw->iframes[i], scale);
}
/**
* Locate a browser window in the specified stack according.
*
* \param bw the browser_window to search all relatives of
* \param target the target to locate
* \param new_window always return a new window (ie 'Open Link in New Window')
*/
struct browser_window *browser_window_find_target(struct browser_window *bw, const char *target,
bool new_window)
{
struct browser_window *bw_target;
struct browser_window *top;
struct content *c;
int rdepth;
/* use the base target if we don't have one */
c = bw->current_content;
if (!target && c && c->data.html.base_target)
target = c->data.html.base_target;
if (!target)
target = TARGET_SELF;
/* allow the simple case of target="_blank" to be ignored if requested */
if ((!new_window) && (!option_target_blank)) {
if ((target == TARGET_BLANK) || (!strcasecmp(target, "_blank")))
return bw;
}
/* handle reserved keywords */
if ((new_window) || ((target == TARGET_BLANK) || (!strcasecmp(target, "_blank")))) {
bw_target = browser_window_create(NULL, bw, NULL, false);
if (!bw_target)
return bw;
return bw_target;
} else if ((target == TARGET_SELF) || (!strcasecmp(target, "_self"))) {
return bw;
} else if ((target == TARGET_PARENT) || (!strcasecmp(target, "_parent"))) {
if (bw->parent)
return bw->parent;
return bw;
} else if ((target == TARGET_TOP) || (!strcasecmp(target, "_top"))) {
while (bw->parent)
bw = bw->parent;
return bw;
}
/* find frame according to B.8, ie using the following priorities:
*
* 1) current frame
* 2) closest to front
*/
rdepth = -1;
bw_target = NULL;
for (top = bw; top->parent; top = top->parent);
browser_window_find_target_internal(top, target, 0, bw, &rdepth, &bw_target);
if (bw_target)
return bw_target;
/* we require a new window using the target name */
if (!option_target_blank)
return bw;
bw_target = browser_window_create(NULL, bw, NULL, false);
if (!bw_target)
return bw;
/* frame names should begin with an alphabetic character (a-z,A-Z), however in
* practice you get things such as '_new' and '2left'. The only real effect this
* has is when giving out names as it can be assumed that an author intended '_new'
* to create a new nameless window (ie '_blank') whereas in the case of '2left' the
* intention was for a new named window. As such we merely special case windows that
* begin with an underscore. */
if (target[0] != '_') {
bw_target->name = strdup(target);
if (!bw_target->name)
warn_user("NoMemory", 0);
}
return bw_target;
}
void browser_window_find_target_internal(struct browser_window *bw, const char *target,
int depth, struct browser_window *page, int *rdepth, struct browser_window **bw_target)
{
int i;
if ((bw->name) && (!strcasecmp(bw->name, target))) {
if ((bw == page) || (depth > *rdepth)) {
*rdepth = depth;
*bw_target = bw;
}
}
if ((!bw->children) && (!bw->iframes))
return;
depth++;
for (i = 0; i < (bw->cols * bw->rows); i++) {
if ((bw->children[i].name) && (!strcasecmp(bw->children[i].name, target))) {
if ((page == &bw->children[i]) || (depth > *rdepth)) {
*rdepth = depth;
*bw_target = &bw->children[i];
}
}
if (bw->children[i].children)
browser_window_find_target_internal(&bw->children[i], target, depth,
page, rdepth, bw_target);
}
for (i = 0; i < bw->iframe_count; i++)
browser_window_find_target_internal(&bw->iframes[i], target, depth, page,
rdepth, bw_target);
}
/**
* Callback for fetch for download window fetches.
*/
void download_window_callback(fetch_msg msg, void *p, const void *data,
unsigned long size)
{
struct gui_download_window *download_window = p;
switch (msg) {
case FETCH_PROGRESS:
break;
case FETCH_DATA:
gui_download_window_data(download_window, data, size);
break;
case FETCH_FINISHED:
gui_download_window_done(download_window);
break;
case FETCH_ERROR:
gui_download_window_error(download_window, data);
break;
case FETCH_TYPE:
case FETCH_NOTMODIFIED:
case FETCH_AUTH:
#ifdef WITH_SSL
case FETCH_CERT_ERR:
#endif
default:
/* not possible */
assert(0);
break;
}
}
/**
* Handle mouse clicks in a browser window.
*
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*/
void browser_window_mouse_click(struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
struct content *c = bw->current_content;
if (!c)
return;
browser_window_remove_caret(bw);
switch (c->type) {
case CONTENT_HTML:
browser_window_mouse_action_html(bw, mouse, x, y);
break;
case CONTENT_TEXTPLAIN:
browser_window_mouse_action_text(bw, mouse, x, y);
break;
default:
if (mouse & BROWSER_MOUSE_MOD_2) {
if (mouse & BROWSER_MOUSE_DRAG_2)
gui_drag_save_object(GUI_SAVE_OBJECT_NATIVE, c,
bw->window);
else if (mouse & BROWSER_MOUSE_DRAG_1)
gui_drag_save_object(GUI_SAVE_OBJECT_ORIG, c,
bw->window);
}
else if (mouse & (BROWSER_MOUSE_DRAG_1 |
BROWSER_MOUSE_DRAG_2)) {
browser_window_page_drag_start(bw, x, y);
browser_window_set_pointer(bw->window, GUI_POINTER_MOVE);
}
break;
}
}
/**
* Handle mouse clicks and movements in an HTML content window.
*
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*
* This function handles both hovering and clicking. It is important that the
* code path is identical (except that hovering doesn't carry out the action),
* so that the status bar reflects exactly what will happen. Having separate
* code paths opens the possibility that an attacker will make the status bar
* show some harmless action where clicking will be harmful.
*/
void browser_window_mouse_action_html(struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
enum { ACTION_NONE, ACTION_SUBMIT, ACTION_GO } action = ACTION_NONE;
char *base_url = 0;
char *title = 0;
const char *url = 0;
const char *target = 0;
char status_buffer[200];
const char *status = 0;
gui_pointer_shape pointer = GUI_POINTER_DEFAULT;
int box_x = 0, box_y = 0;
int gadget_box_x = 0, gadget_box_y = 0;
int scroll_box_x = 0, scroll_box_y = 0;
int text_box_x = 0, text_box_y = 0;
struct box *gadget_box = 0;
struct box *scroll_box = 0;
struct box *text_box = 0;
struct content *c = bw->current_content;
struct box *box;
struct content *content = c;
struct content *gadget_content = c;
struct content *url_content = c;
struct form_control *gadget = 0;
struct content *object = NULL;
struct box *next_box;
bw->drag_type = DRAGGING_NONE;
bw->scrolling_box = NULL;
/* search the box tree for a link, imagemap, form control, or
* box with scrollbars */
box = c->data.html.layout;
/* Consider the margins of the html page now */
box_x = box->margin[LEFT];
box_y = box->margin[TOP];
while ((next_box = box_at_point(box, x, y, &box_x, &box_y, &content)) !=
NULL) {
box = next_box;
if (box->style &&
box->style->visibility == CSS_VISIBILITY_HIDDEN)
continue;
if (box->object)
object = box->object;
if (box->href) {
url_content = content;
url = box->href;
target = box->target;
}
if (box->usemap)
url = imagemap_get(content, box->usemap,
box_x, box_y, x, y, &target);
if (box->gadget) {
gadget_content = content;
base_url = content->data.html.base_url;
gadget = box->gadget;
gadget_box = box;
gadget_box_x = box_x;
gadget_box_y = box_y;
if (gadget->form)
target = gadget->form->target;
}
if (box->title)
title = box->title;
if (box->style && box->style->cursor != CSS_CURSOR_UNKNOWN)
pointer = get_pointer_shape(box->style->cursor);
if (box->style && box->type != BOX_BR &&
box->type != BOX_INLINE &&
box->type != BOX_TEXT &&
(box->style->overflow == CSS_OVERFLOW_SCROLL ||
box->style->overflow == CSS_OVERFLOW_AUTO) &&
((box_vscrollbar_present(box) &&
box_x + box->scroll_x + box->padding[LEFT] +
box->width < x) ||
(box_hscrollbar_present(box) &&
box_y + box->scroll_y + box->padding[TOP] +
box->height < y))) {
scroll_box = box;
scroll_box_x = box_x + box->scroll_x;
scroll_box_y = box_y + box->scroll_y;
}
if (box->text && !box->object) {
text_box = box;
text_box_x = box_x;
text_box_y = box_y;
}
}
/* use of box_x, box_y, or content below this point is probably a
* mistake; they will refer to the last box returned by box_at_point */
if (scroll_box) {
status = browser_window_scrollbar_click(bw, mouse, scroll_box,
scroll_box_x, scroll_box_y,
x - scroll_box_x, y - scroll_box_y);
} else if (gadget) {
switch (gadget->type) {
case GADGET_SELECT:
status = messages_get("FormSelect");
pointer = GUI_POINTER_MENU;
if (mouse & BROWSER_MOUSE_CLICK_1)
gui_create_form_select_menu(bw, gadget);
break;
case GADGET_CHECKBOX:
status = messages_get("FormCheckbox");
if (mouse & BROWSER_MOUSE_CLICK_1) {
gadget->selected = !gadget->selected;
browser_redraw_box(gadget_content, gadget_box);
}
break;
case GADGET_RADIO:
status = messages_get("FormRadio");
if (mouse & BROWSER_MOUSE_CLICK_1)
browser_radio_set(gadget_content, gadget);
break;
case GADGET_IMAGE:
if (mouse & BROWSER_MOUSE_CLICK_1) {
gadget->data.image.mx = x - gadget_box_x;
gadget->data.image.my = y - gadget_box_y;
}
/* drop through */
case GADGET_SUBMIT:
if (gadget->form) {
snprintf(status_buffer, sizeof status_buffer,
messages_get("FormSubmit"),
gadget->form->action);
status = status_buffer;
pointer = GUI_POINTER_POINT;
if (mouse & (BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2))
action = ACTION_SUBMIT;
} else {
status = messages_get("FormBadSubmit");
}
break;
case GADGET_TEXTAREA:
status = messages_get("FormTextarea");
pointer = GUI_POINTER_CARET;
if (mouse & (BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2)) {
if (text_box && selection_root(bw->sel) != gadget_box)
selection_init(bw->sel, gadget_box);
browser_window_textarea_click(bw,
mouse,
gadget_box,
gadget_box_x,
gadget_box_y,
x - gadget_box_x,
y - gadget_box_y);
}
if (text_box) {
int pixel_offset;
size_t idx;
nsfont_position_in_string(text_box->style,
text_box->text,
text_box->length,
x - text_box_x,
&idx,
&pixel_offset);
selection_click(bw->sel, mouse,
text_box->byte_offset + idx);
if (selection_dragging(bw->sel)) {
bw->drag_type = DRAGGING_SELECTION;
status = messages_get("Selecting");
} else
status = c->status_message;
}
else if (mouse & BROWSER_MOUSE_CLICK_1)
selection_clear(bw->sel, true);
break;
case GADGET_TEXTBOX:
case GADGET_PASSWORD:
status = messages_get("FormTextbox");
pointer = GUI_POINTER_CARET;
if ((mouse & BROWSER_MOUSE_CLICK_1) &&
!(mouse & (BROWSER_MOUSE_MOD_1 |
BROWSER_MOUSE_MOD_2))) {
browser_window_input_click(bw,
gadget_box,
gadget_box_x,
gadget_box_y,
x - gadget_box_x,
y - gadget_box_y);
}
if (text_box) {
int pixel_offset;
size_t idx;
if (mouse & (BROWSER_MOUSE_DRAG_1 |
BROWSER_MOUSE_DRAG_2))
selection_init(bw->sel, gadget_box);
nsfont_position_in_string(text_box->style,
text_box->text,
text_box->length,
x - text_box_x,
&idx,
&pixel_offset);
selection_click(bw->sel, mouse,
text_box->byte_offset + idx);
if (selection_dragging(bw->sel))
bw->drag_type = DRAGGING_SELECTION;
}
else if (mouse & BROWSER_MOUSE_CLICK_1)
selection_clear(bw->sel, true);
break;
case GADGET_HIDDEN:
/* not possible: no box generated */
break;
case GADGET_RESET:
status = messages_get("FormReset");
break;
case GADGET_FILE:
status = messages_get("FormFile");
break;
}
} else if (object && (mouse & BROWSER_MOUSE_MOD_2)) {
if (mouse & BROWSER_MOUSE_DRAG_2)
gui_drag_save_object(GUI_SAVE_OBJECT_NATIVE, object,
bw->window);
else if (mouse & BROWSER_MOUSE_DRAG_1)
gui_drag_save_object(GUI_SAVE_OBJECT_ORIG, object,
bw->window);
/* \todo should have a drag-saving object msg */
status = c->status_message;
} else if (url) {
if (title) {
snprintf(status_buffer, sizeof status_buffer, "%s: %s",
url, title);
status = status_buffer;
} else
status = url;
pointer = GUI_POINTER_POINT;
if (mouse & BROWSER_MOUSE_CLICK_1 &&
mouse & BROWSER_MOUSE_MOD_1) {
/* force download of link */
browser_window_go_post(bw, url, 0, 0, false,
c->url, true, true, 0);
} else if (mouse & BROWSER_MOUSE_CLICK_2 &&
mouse & BROWSER_MOUSE_MOD_1) {
free(browser_window_href_content.url);
browser_window_href_content.url = strdup(url);
if (!browser_window_href_content.url)
warn_user("NoMemory", 0);
else
gui_window_save_as_link(bw->window,
&browser_window_href_content);
} else if (mouse & (BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2))
action = ACTION_GO;
} else {
bool done = false;
/* frame resizing */
if (bw->parent) {
struct browser_window *parent;
for (parent = bw->parent; parent->parent; parent = parent->parent);
browser_window_resize_frames(parent, mouse, x + bw->x0, y + bw->y0,
&pointer, &status, &done);
}
/* if clicking in the main page, remove the selection from any text areas */
if (!done) {
if (text_box &&
(mouse & (BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2)) &&
selection_root(bw->sel) != c->data.html.layout)
selection_init(bw->sel, c->data.html.layout);
if (text_box) {
int pixel_offset;
size_t idx;
nsfont_position_in_string(text_box->style,
text_box->text,
text_box->length,
x - text_box_x,
&idx,
&pixel_offset);
if (selection_click(bw->sel, mouse,
text_box->byte_offset + idx)) {
/* key presses must be directed at the
* main browser window, paste text
* operations ignored */
browser_window_remove_caret(bw);
if (selection_dragging(bw->sel)) {
bw->drag_type =
DRAGGING_SELECTION;
status =
messages_get("Selecting");
} else
status = c->status_message;
done = true;
}
}
else if (mouse & BROWSER_MOUSE_CLICK_1)
selection_clear(bw->sel, true);
}
if (!done) {
if (title)
status = title;
else if (bw->loading_content)
status = bw->loading_content->status_message;
else
status = c->status_message;
if (mouse & BROWSER_MOUSE_DRAG_1) {
if (mouse & BROWSER_MOUSE_MOD_2) {
gui_drag_save_object(GUI_SAVE_COMPLETE,
c, bw->window);
} else {
browser_window_page_drag_start(bw,
x, y);
pointer = GUI_POINTER_MOVE;
}
}
else if (mouse & BROWSER_MOUSE_DRAG_2) {
if (mouse & BROWSER_MOUSE_MOD_2) {
gui_drag_save_object(GUI_SAVE_SOURCE,
c, bw->window);
} else {
browser_window_page_drag_start(bw,
x, y);
pointer = GUI_POINTER_MOVE;
}
}
}
}
assert(status);
browser_window_set_status(bw, status);
browser_window_set_pointer(bw->window, pointer);
/* deferred actions that can cause this browser_window to be destroyed
and must therefore be done after set_status/pointer
*/
switch (action) {
case ACTION_SUBMIT:
browser_form_submit(bw,
browser_window_find_target(bw, target,
(mouse & BROWSER_MOUSE_CLICK_2)),
gadget->form, gadget);
break;
case ACTION_GO:
browser_window_go(browser_window_find_target(bw, target,
(mouse & BROWSER_MOUSE_CLICK_2)),
url, c->url, true);
break;
case ACTION_NONE:
break;
}
}
/**
* Handle mouse clicks and movements in a TEXTPLAIN content window.
*
* \param bw browser window
* \param click type of mouse click
* \param x coordinate of mouse
* \param y coordinate of mouse
*
* This function handles both hovering and clicking. It is important that the
* code path is identical (except that hovering doesn't carry out the action),
* so that the status bar reflects exactly what will happen. Having separate
* code paths opens the possibility that an attacker will make the status bar
* show some harmless action where clicking will be harmful.
*/
void browser_window_mouse_action_text(struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
struct content *c = bw->current_content;
gui_pointer_shape pointer = GUI_POINTER_DEFAULT;
const char *status = 0;
size_t idx;
int dir = 0;
bw->drag_type = DRAGGING_NONE;
if (!bw->sel) return;
idx = textplain_offset_from_coords(c, x, y, dir);
if (selection_click(bw->sel, mouse, idx)) {
if (selection_dragging(bw->sel)) {
bw->drag_type = DRAGGING_SELECTION;
status = messages_get("Selecting");
}
else
status = c->status_message;
}
else {
if (bw->loading_content)
status = bw->loading_content->status_message;
else
status = c->status_message;
if (mouse & (BROWSER_MOUSE_DRAG_1 | BROWSER_MOUSE_DRAG_2)) {
browser_window_page_drag_start(bw, x, y);
pointer = GUI_POINTER_MOVE;
}
}
assert(status);
browser_window_set_status(bw, status);
browser_window_set_pointer(bw->window, pointer);
}
/**
* Handle mouse movements in a browser window.
*
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*/
void browser_window_mouse_track(struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
struct content *c = bw->current_content;
if ((!c) && (bw->drag_type != DRAGGING_FRAME))
return;
/* detect end of drag operation in case the platform-specific code
doesn't call browser_mouse_drag_end() (RISC OS code does) */
if (bw->drag_type != DRAGGING_NONE && !mouse) {
browser_window_mouse_drag_end(bw, mouse, x, y);
}
if (bw->drag_type == DRAGGING_FRAME) {
browser_window_resize_frame(bw, bw->x0 + x, bw->y0 + y);
} else if (bw->drag_type == DRAGGING_PAGE_SCROLL) {
/* mouse movement since drag started */
int scrollx = bw->drag_start_x - x;
int scrolly = bw->drag_start_y - y;
/* new scroll offsets */
scrollx += bw->drag_start_scroll_x;
scrolly += bw->drag_start_scroll_y;
bw->drag_start_scroll_x = scrollx;
bw->drag_start_scroll_y = scrolly;
gui_window_set_scroll(bw->window, scrollx, scrolly);
} else switch (c->type) {
case CONTENT_HTML:
browser_window_mouse_track_html(bw, mouse, x, y);
break;
case CONTENT_TEXTPLAIN:
browser_window_mouse_track_text(bw, mouse, x, y);
break;
default:
break;
}
}
/**
* Handle mouse tracking (including drags) in an HTML content window.
*
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*/
void browser_window_mouse_track_html(struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
switch (bw->drag_type) {
case DRAGGING_HSCROLL:
case DRAGGING_VSCROLL:
case DRAGGING_2DSCROLL: {
struct box *box = bw->scrolling_box;
int scroll_y;
int scroll_x;
assert(box);
if (bw->drag_type == DRAGGING_HSCROLL) {
scroll_y = box->scroll_y;
} else {
scroll_y = bw->drag_start_scroll_y +
(float) (y - bw->drag_start_y) /
(float) bw->drag_well_height *
(float) (box->descendant_y1 -
box->descendant_y0);
if (scroll_y < box->descendant_y0)
scroll_y = box->descendant_y0;
else if (box->descendant_y1 - box->height < scroll_y)
scroll_y = box->descendant_y1 - box->height;
if (scroll_y == box->scroll_y)
return;
}
if (bw->drag_type == DRAGGING_VSCROLL) {
scroll_x = box->scroll_x;
} else {
scroll_x = bw->drag_start_scroll_x +
(float) (x - bw->drag_start_x) /
(float) bw->drag_well_width *
(float) (box->descendant_x1 -
box->descendant_x0);
if (scroll_x < box->descendant_x0)
scroll_x = box->descendant_x0;
else if (box->descendant_x1 - box->width < scroll_x)
scroll_x = box->descendant_x1 - box->width;
}
browser_window_scroll_box(bw, box, scroll_x, scroll_y);
}
break;
case DRAGGING_SELECTION: {
struct box *box;
int dir = -1;
int dx, dy;
if (selection_dragging_start(bw->sel)) dir = 1;
box = browser_window_pick_text_box(bw, x, y, dir,
&dx, &dy);
if (box) {
int pixel_offset;
size_t idx;
nsfont_position_in_string(box->style,
box->text, box->length,
dx, &idx, &pixel_offset);
selection_track(bw->sel, mouse,
box->byte_offset + idx);
}
}
break;
default:
browser_window_mouse_action_html(bw, mouse, x, y);
break;
}
}
/**
* Handle mouse tracking (including drags) in a TEXTPLAIN content window.
*
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*/
void browser_window_mouse_track_text(struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
switch (bw->drag_type) {
case DRAGGING_SELECTION: {
struct content *c = bw->current_content;
int dir = -1;
size_t idx;
if (selection_dragging_start(bw->sel)) dir = 1;
idx = textplain_offset_from_coords(c, x, y, dir);
selection_track(bw->sel, mouse, idx);
}
break;
default:
browser_window_mouse_action_text(bw, mouse, x, y);
break;
}
}
/**
* Handles the end of a drag operation in a browser window.
*
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*/
void browser_window_mouse_drag_end(struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
switch (bw->drag_type) {
case DRAGGING_SELECTION: {
struct content *c = bw->current_content;
if (c) {
bool found = true;
int dir = -1;
size_t idx;
if (selection_dragging_start(bw->sel)) dir = 1;
if (c->type == CONTENT_HTML) {
int pixel_offset;
struct box *box;
int dx, dy;
box = browser_window_pick_text_box(bw,
x, y, dir, &dx, &dy);
if (box) {
nsfont_position_in_string(
box->style,
box->text,
box->length,
dx,
&idx,
&pixel_offset);
idx += box->byte_offset;
selection_track(bw->sel, mouse,
idx);
}
else
found = false;
}
else {
assert(c->type == CONTENT_TEXTPLAIN);
idx = textplain_offset_from_coords(c, x, y, dir);
}
if (found)
selection_track(bw->sel, mouse, idx);
}
selection_drag_end(bw->sel);
}
break;
case DRAGGING_2DSCROLL:
case DRAGGING_PAGE_SCROLL:
case DRAGGING_FRAME:
browser_window_set_pointer(bw->window, GUI_POINTER_DEFAULT);
break;
default:
break;
}
bw->drag_type = DRAGGING_NONE;
}
/**
* Handle mouse clicks in a box scrollbar.
*
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param box scrolling box
* \param box_x position of box in global document coordinates
* \param box_y position of box in global document coordinates
* \param x coordinate of click relative to box position
* \param y coordinate of click relative to box position
* \return status bar message
*/
const char *browser_window_scrollbar_click(struct browser_window *bw,
browser_mouse_state mouse, struct box *box,
int box_x, int box_y, int x, int y)
{
const browser_mouse_state but1 = (BROWSER_MOUSE_CLICK_1 |
BROWSER_MOUSE_DRAG_1 | BROWSER_MOUSE_HOLDING_1);
const browser_mouse_state but2 = (BROWSER_MOUSE_CLICK_2 |
BROWSER_MOUSE_DRAG_2 | BROWSER_MOUSE_HOLDING_2);
const int w = SCROLLBAR_WIDTH;
bool vscroll, hscroll;
int well_height, bar_top, bar_height;
int well_width, bar_left, bar_width;
const char *status = 0;
bool vert;
int z, scroll, bar_start, bar_size, well_size, page;
box_scrollbar_dimensions(box,
box->padding[LEFT] + box->width + box->padding[RIGHT],
box->padding[TOP] + box->height + box->padding[BOTTOM],
w,
&vscroll, &hscroll,
&well_height, &bar_top, &bar_height,
&well_width, &bar_left, &bar_width);
/* store some data for scroll drags */
bw->scrolling_box = box;
bw->drag_start_x = box_x + x;
bw->drag_start_y = box_y + y;
bw->drag_start_scroll_x = box->scroll_x;
bw->drag_start_scroll_y = box->scroll_y;
bw->drag_well_width = well_width;
bw->drag_well_height = well_height;
/* determine which scrollbar was clicked */
if (box_vscrollbar_present(box) &&
box->padding[LEFT] + box->width < x) {
vert = true;
z = y;
scroll = box->scroll_y;
well_size = well_height;
bar_start = bar_top;
bar_size = bar_height;
page = box->height;
} else {
vert = false;
z = x;
scroll = box->scroll_x;
well_size = well_width;
bar_start = bar_left;
bar_size = bar_width;
page = box->width;
}
/* find icon in scrollbar and calculate scroll */
if (z < w) {
status = messages_get(vert ? "ScrollUp" : "ScrollLeft");
if (mouse & but2)
scroll += 16;
else if (mouse & but1)
scroll -= 16;
} else if (z < w + bar_start + w / 4) {
status = messages_get(vert ? "ScrollPUp" : "ScrollPLeft");
if (mouse & BROWSER_MOUSE_CLICK_1)
scroll -= page;
else if (mouse & BROWSER_MOUSE_CLICK_2)
scroll += page;
} else if (z < w + bar_start + bar_size - w / 4) {
status = messages_get(vert ? "ScrollV" : "ScrollH");
/* respond on the click rather than the drag because it gives
the scrollbars a more solid, RISC OS feel */
if (mouse & (BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2)) {
int x0 = 0, x1 = 0;
int y0 = 0, y1 = 0;
if (mouse & BROWSER_MOUSE_CLICK_1) {
bw->drag_type = vert ? DRAGGING_VSCROLL :
DRAGGING_HSCROLL;
} else
bw->drag_type = DRAGGING_2DSCROLL;
/* \todo - some proper numbers please! */
if (bw->drag_type != DRAGGING_VSCROLL) {
x0 = -1024;
x1 = 1024;
}
if (bw->drag_type != DRAGGING_HSCROLL) {
y0 = -1024;
y1 = 1024;
}
gui_window_box_scroll_start(bw->window, x0, y0, x1, y1);
if (bw->drag_type == DRAGGING_2DSCROLL)
gui_window_hide_pointer(bw->window);
}
} else if (z < w + well_size) {
status = messages_get(vert ? "ScrollPDown" : "ScrollPRight");
if (mouse & BROWSER_MOUSE_CLICK_1)
scroll += page;
else if (mouse & BROWSER_MOUSE_CLICK_2)
scroll -= page;
} else {
status = messages_get(vert ? "ScrollDown" : "ScrollRight");
if (mouse & but2)
scroll -= 16;
else if (mouse & but1)
scroll += 16;
}
/* update box and redraw */
if (vert) {
if (scroll < box->descendant_y0)
scroll = box->descendant_y0;
else if (box->descendant_y1 - box->height < scroll)
scroll = box->descendant_y1 - box->height;
if (scroll != box->scroll_y)
browser_window_scroll_box(bw, box, box->scroll_x, scroll);
} else {
if (scroll < box->descendant_x0)
scroll = box->descendant_x0;
else if (box->descendant_x1 - box->width < scroll)
scroll = box->descendant_x1 - box->width;
if (scroll != box->scroll_x)
browser_window_scroll_box(bw, box, scroll, box->scroll_y);
}
return status;
}
/**
* Set a radio form control and clear the others in the group.
*
* \param content content containing the form, of type CONTENT_TYPE
* \param radio form control of type GADGET_RADIO
*/
void browser_radio_set(struct content *content,
struct form_control *radio)
{
struct form_control *control;
assert(content);
assert(radio);
if (!radio->form)
return;
if (radio->selected)
return;
for (control = radio->form->controls; control;
control = control->next) {
if (control->type != GADGET_RADIO)
continue;
if (control == radio)
continue;
if (strcmp(control->name, radio->name) != 0)
continue;
if (control->selected) {
control->selected = false;
browser_redraw_box(content, control->box);
}
}
radio->selected = true;
browser_redraw_box(content, radio->box);
}
/**
* Redraw a rectangular region of a browser window
*
* \param bw browser window to be redrawn
* \param x x co-ord of top-left
* \param y y co-ord of top-left
* \param width width of rectangle
* \param height height of rectangle
*/
void browser_window_redraw_rect(struct browser_window *bw, int x, int y,
int width, int height)
{
struct content *c = bw->current_content;
if (c) {
union content_msg_data data;
data.redraw.x = x;
data.redraw.y = y;
data.redraw.width = width;
data.redraw.height = height;
data.redraw.full_redraw = true;
data.redraw.object = c;
data.redraw.object_x = 0;
data.redraw.object_y = 0;
data.redraw.object_width = c->width;
data.redraw.object_height = c->height;
content_broadcast(c, CONTENT_MSG_REDRAW, data);
}
}
/**
* Redraw a box.
*
* \param c content containing the box, of type CONTENT_HTML
* \param box box to redraw
*/
void browser_redraw_box(struct content *c, struct box *box)
{
int x, y;
union content_msg_data data;
box_coords(box, &x, &y);
data.redraw.x = x;
data.redraw.y = y;
data.redraw.width = box->padding[LEFT] + box->width +
box->padding[RIGHT];
data.redraw.height = box->padding[TOP] + box->height +
box->padding[BOTTOM];
data.redraw.full_redraw = true;
data.redraw.object = c;
data.redraw.object_x = 0;
data.redraw.object_y = 0;
data.redraw.object_width = c->width;
data.redraw.object_height = c->height;
content_broadcast(c, CONTENT_MSG_REDRAW, data);
}
/**
* Update the scroll offsets of a box within a browser window
* (In future, copying where possible, rather than redrawing the entire box)
*
* \param bw browser window
* \param box box to be updated
* \param scroll_x new horizontal scroll offset
* \param scroll_y new vertical scroll offset
*/
void browser_window_scroll_box(struct browser_window *bw, struct box *box,
int scroll_x, int scroll_y)
{
box->scroll_x = scroll_x;
box->scroll_y = scroll_y;
/* fall back to redrawing the whole box */
browser_redraw_box(bw->current_content, box);
}
/**
* Process a selection from a form select menu.
*
* \param bw browser window with menu
* \param control form control with menu
* \param item index of item selected from the menu
*/
void browser_window_form_select(struct browser_window *bw,
struct form_control *control, int item)
{
struct form_option *o;
int count;
assert(bw);
assert(control);
struct box *inline_box = control->box->children->children;
for (count = 0, o = control->data.select.items;
o != NULL;
count++, o = o->next) {
if (!control->data.select.multiple)
o->selected = false;
if (count == item) {
if (control->data.select.multiple) {
if (o->selected) {
o->selected = false;
control->data.select.num_selected--;
} else {
o->selected = true;
control->data.select.num_selected++;
}
} else {
o->selected = true;
}
}
if (o->selected)
control->data.select.current = o;
}
talloc_free(inline_box->text);
inline_box->text = 0;
if (control->data.select.num_selected == 0)
inline_box->text = talloc_strdup(bw->current_content,
messages_get("Form_None"));
else if (control->data.select.num_selected == 1)
inline_box->text = talloc_strdup(bw->current_content,
control->data.select.current->text);
else
inline_box->text = talloc_strdup(bw->current_content,
messages_get("Form_Many"));
if (!inline_box->text) {
warn_user("NoMemory", 0);
inline_box->length = 0;
} else
inline_box->length = strlen(inline_box->text);
inline_box->width = control->box->width;
browser_redraw_box(bw->current_content, control->box);
}
gui_pointer_shape get_pointer_shape(css_cursor cursor)
{
gui_pointer_shape pointer;
switch (cursor) {
case CSS_CURSOR_CROSSHAIR:
pointer = GUI_POINTER_CROSS;
break;
case CSS_CURSOR_POINTER:
pointer = GUI_POINTER_POINT;
break;
case CSS_CURSOR_MOVE:
pointer = GUI_POINTER_MOVE;
break;
case CSS_CURSOR_E_RESIZE:
pointer = GUI_POINTER_RIGHT;
break;
case CSS_CURSOR_W_RESIZE:
pointer = GUI_POINTER_LEFT;
break;
case CSS_CURSOR_N_RESIZE:
pointer = GUI_POINTER_UP;
break;
case CSS_CURSOR_S_RESIZE:
pointer = GUI_POINTER_DOWN;
break;
case CSS_CURSOR_NE_RESIZE:
pointer = GUI_POINTER_RU;
break;
case CSS_CURSOR_SW_RESIZE:
pointer = GUI_POINTER_LD;
break;
case CSS_CURSOR_SE_RESIZE:
pointer = GUI_POINTER_RD;
break;
case CSS_CURSOR_NW_RESIZE:
pointer = GUI_POINTER_LU;
break;
case CSS_CURSOR_TEXT:
pointer = GUI_POINTER_CARET;
break;
case CSS_CURSOR_WAIT:
pointer = GUI_POINTER_WAIT;
break;
case CSS_CURSOR_PROGRESS:
pointer = GUI_POINTER_PROGRESS;
break;
case CSS_CURSOR_NO_DROP:
pointer = GUI_POINTER_NO_DROP;
break;
case CSS_CURSOR_NOT_ALLOWED:
pointer = GUI_POINTER_NOT_ALLOWED;
break;
case CSS_CURSOR_HELP:
pointer = GUI_POINTER_HELP;
break;
default:
pointer = GUI_POINTER_DEFAULT;
break;
}
return pointer;
}
/**
* Collect controls and submit a form.
*/
void browser_form_submit(struct browser_window *bw, struct browser_window *target,
struct form *form, struct form_control *submit_button)
{
char *data = 0, *url = 0;
struct form_successful_control *success;
assert(form);
assert(bw->current_content->type == CONTENT_HTML);
if (!form_successful_controls(form, submit_button, &success)) {
warn_user("NoMemory", 0);
return;
}
switch (form->method) {
case method_GET:
data = form_url_encode(form, success);
if (!data) {
form_free_successful(success);
warn_user("NoMemory", 0);
return;
}
url = calloc(1, strlen(form->action) +
strlen(data) + 2);
if (!url) {
form_free_successful(success);
free(data);
warn_user("NoMemory", 0);
return;
}
if (form->action[strlen(form->action)-1] == '?') {
sprintf(url, "%s%s", form->action, data);
}
else {
sprintf(url, "%s?%s", form->action, data);
}
browser_window_go(target, url,
bw->current_content->url, true);
break;
case method_POST_URLENC:
data = form_url_encode(form, success);
if (!data) {
form_free_successful(success);
warn_user("NoMemory", 0);
return;
}
browser_window_go_post(target, form->action, data, 0,
true, bw->current_content->url,
false, true, 0);
break;
case method_POST_MULTIPART:
browser_window_go_post(target, form->action, 0,
success, true,
bw->current_content->url,
false, true, 0);
break;
default:
assert(0);
}
form_free_successful(success);
free(data);
free(url);
}
/**
* Check whether box is nearer mouse coordinates than current nearest box
*
* \param box box to test
* \param bx position of box, in global document coordinates
* \param by position of box, in global document coordinates
* \param x mouse point, in global document coordinates
* \param y mouse point, in global document coordinates
* \param dir direction in which to search (-1 = above-left,
* +1 = below-right)
* \param nearest nearest text box found, or NULL if none
* updated if box is nearer than existing nearest
* \param tx position of text_box, in global document coordinates
* updated if box is nearer than existing nearest
* \param ty position of text_box, in global document coordinates
* updated if box is nearer than existing nearest
* \param nr_xd distance to nearest text box found
* updated if box is nearer than existing nearest
* \param ny_yd distance to nearest text box found
* updated if box is nearer than existing nearest
* \return true if mouse point is inside box
*/
bool browser_window_nearer_text_box(struct box *box, int bx, int by,
int x, int y, int dir, struct box **nearest, int *tx, int *ty,
int *nr_xd, int *nr_yd)
{
int w = box->padding[LEFT] + box->width + box->padding[RIGHT];
int h = box->padding[TOP] + box->height + box->padding[BOTTOM];
int y1 = by + h;
int x1 = bx + w;
int yd = INT_MAX;
int xd = INT_MAX;
if (x >= bx && x1 > x && y >= by && y1 > y) {
*nearest = box;
*tx = bx;
*ty = by;
return true;
}
if (box->parent->list_marker != box) {
if (dir < 0) {
/* consider only those children (partly) above-left */
if (by <= y && bx < x) {
yd = y <= y1 ? 0 : y - y1;
xd = x <= x1 ? 0 : x - x1;
}
} else {
/* consider only those children (partly) below-right */
if (y1 > y && x1 > x) {
yd = y > by ? 0 : by - y;
xd = x > bx ? 0 : bx - x;
}
}
/* give y displacement precedence over x */
if (yd < *nr_yd || (yd == *nr_yd && xd <= *nr_xd)) {
*nr_yd = yd;
*nr_xd = xd;
*nearest = box;
*tx = bx;
*ty = by;
}
}
return false;
}
/**
* Pick the text box child of 'box' that is closest to and above-left
* (dir -ve) or below-right (dir +ve) of the point 'x,y'
*
* \param box parent box
* \param bx position of box, in global document coordinates
* \param by position of box, in global document coordinates
* \param fx position of float parent, in global document coordinates
* \param fy position of float parent, in global document coordinates
* \param x mouse point, in global document coordinates
* \param y mouse point, in global document coordinates
* \param dir direction in which to search (-1 = above-left,
* +1 = below-right)
* \param nearest nearest text box found, or NULL if none
* updated if a descendant of box is nearer than old nearest
* \param tx position of nearest, in global document coordinates
* updated if a descendant of box is nearer than old nearest
* \param ty position of nearest, in global document coordinates
* updated if a descendant of box is nearer than old nearest
* \param nr_xd distance to nearest text box found
* updated if a descendant of box is nearer than old nearest
* \param ny_yd distance to nearest text box found
* updated if a descendant of box is nearer than old nearest
* \return true if mouse point is inside text_box
*/
bool browser_window_nearest_text_box(struct box *box, int bx, int by,
int fx, int fy, int x, int y, int dir, struct box **nearest,
int *tx, int *ty, int *nr_xd, int *nr_yd)
{
struct box *child = box->children;
int c_bx, c_by;
int c_fx, c_fy;
bool in_box = false;
if (*nearest == NULL) {
*nr_xd = INT_MAX / 2; /* displacement of 'nearest so far' */
*nr_yd = INT_MAX / 2;
}
if (box->type == BOX_INLINE_CONTAINER) {
int bw = box->padding[LEFT] + box->width + box->padding[RIGHT];
int bh = box->padding[TOP] + box->height + box->padding[BOTTOM];
int b_y1 = by + bh;
int b_x1 = bx + bw;
if (x >= bx && b_x1 > x && y >= by && b_y1 > y) {
in_box = true;
}
}
while (child) {
if (child->type == BOX_FLOAT_LEFT ||
child->type == BOX_FLOAT_RIGHT) {
c_bx = fx + child->x - child->scroll_x;
c_by = fy + child->y - child->scroll_y;
} else {
c_bx = bx + child->x - child->scroll_x;
c_by = by + child->y - child->scroll_y;
}
if (child->float_children) {
c_fx = c_bx;
c_fy = c_by;
} else {
c_fx = fx;
c_fy = fy;
}
if (in_box && child->text && !child->object) {
if (browser_window_nearer_text_box(child,
c_bx, c_by, x, y, dir, nearest,
tx, ty, nr_xd, nr_yd))
return true;
} else {
if (child->list_marker) {
if (browser_window_nearer_text_box(
child->list_marker,
c_bx + child->list_marker->x,
c_by + child->list_marker->y,
x, y, dir, nearest,
tx, ty, nr_xd, nr_yd))
return true;
}
if (browser_window_nearest_text_box(child, c_bx, c_by,
c_fx, c_fy, x, y, dir, nearest, tx, ty,
nr_xd, nr_yd))
return true;
}
child = child->next;
}
return false;
}
/**
* Peform pick text on browser window contents to locate the box under
* the mouse pointer, or nearest in the given direction if the pointer is
* not over a text box.
*
* \param bw browser window
* \param x coordinate of mouse
* \param y coordinate of mouse
* \param dir direction to search (-1 = above-left, +1 = below-right)
* \param dx receives x ordinate of mouse relative to text box
* \param dy receives y ordinate of mouse relative to text box
*/
struct box *browser_window_pick_text_box(struct browser_window *bw,
int x, int y, int dir, int *dx, int *dy)
{
struct content *c = bw->current_content;
struct box *text_box = NULL;
if (c && c->type == CONTENT_HTML) {
struct box *box = c->data.html.layout;
int nr_xd, nr_yd;
int bx = box->margin[LEFT];
int by = box->margin[TOP];
int fx = bx;
int fy = by;
int tx, ty;
if (!browser_window_nearest_text_box(box, bx, by, fx, fy, x, y,
dir, &text_box, &tx, &ty, &nr_xd, &nr_yd)) {
if (text_box && text_box->text && !text_box->object) {
int w = (text_box->padding[LEFT] +
text_box->width +
text_box->padding[RIGHT]);
int h = (text_box->padding[TOP] +
text_box->height +
text_box->padding[BOTTOM]);
int x1, y1;
y1 = ty + h;
x1 = tx + w;
/* ensure point lies within the text box */
if (x < tx) x = tx;
if (y < ty) y = ty;
if (y > y1) y = y1;
if (x > x1) x = x1;
}
}
/* return coordinates relative to box */
*dx = x - tx;
*dy = y - ty;
}
return text_box;
}
/**
* Start drag scrolling the contents of the browser window
*
* \param bw browser window
* \param x x ordinate of initial mouse position
* \param y y ordinate
*/
void browser_window_page_drag_start(struct browser_window *bw, int x, int y)
{
bw->drag_type = DRAGGING_PAGE_SCROLL;
bw->drag_start_x = x;
bw->drag_start_y = y;
gui_window_get_scroll(bw->window, &bw->drag_start_scroll_x, &bw->drag_start_scroll_y);
gui_window_scroll_start(bw->window);
}
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