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netsurf/desktop/browser.c
Adrian Lees 5295d21743 Reposition caret when browser window reformatted 
svn path=/trunk/netsurf/; revision=2839
2006-08-13 03:05:55 +00:00

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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2005 James Bursa <bursa@users.sourceforge.net>
* Copyright 2004 Andrew Timmins <atimmins@blueyonder.co.uk>
* Copyright 2004 John Tytgat <John.Tytgat@aaug.net>
*/
/** \file
* Browser window creation and manipulation (implementation).
*/
#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "netsurf/utils/config.h"
#include "netsurf/content/fetch.h"
#include "netsurf/content/fetchcache.h"
#include "netsurf/content/urldb.h"
#include "netsurf/css/css.h"
#ifdef WITH_AUTH
#include "netsurf/desktop/401login.h"
#endif
#include "netsurf/desktop/browser.h"
#include "netsurf/desktop/history_core.h"
#include "netsurf/desktop/gui.h"
#include "netsurf/desktop/options.h"
#include "netsurf/desktop/selection.h"
#include "netsurf/desktop/textinput.h"
#include "netsurf/desktop/gesture_core.h"
#include "netsurf/render/box.h"
#include "netsurf/render/form.h"
#include "netsurf/render/font.h"
#include "netsurf/render/imagemap.h"
#include "netsurf/render/layout.h"
#include "netsurf/render/textplain.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/messages.h"
#include "netsurf/utils/talloc.h"
#include "netsurf/utils/url.h"
#include "netsurf/utils/utils.h"
#include "netsurf/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;
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 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_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 struct box *browser_window_nearest_text_box(struct box *box,
int x, int y, int dir);
static struct box *browser_window_pick_text_box(struct browser_window *bw,
browser_mouse_state mouse, int x, int y, int *dx, int *dy,
int dir);
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
*/
struct browser_window *browser_window_create(const char *url, struct browser_window *clone,
char *referer, bool history_add)
{
struct browser_window *bw;
assert(clone || history_add);
if ((bw = malloc(sizeof *bw)) == NULL) {
warn_user("NoMemory", 0);
return NULL;
}
bw->current_content = NULL;
bw->loading_content = NULL;
if (!clone)
bw->history = history_create();
else
bw->history = history_clone(clone->history);
if (!clone || (clone && !clone->gesturer))
bw->gesturer = NULL;
else
bw->gesturer = gesturer_clone(clone->gesturer);
bw->sel = selection_create(bw);
bw->throbbing = false;
bw->caret_callback = NULL;
bw->paste_callback = NULL;
bw->move_callback = NULL;
bw->frag_id = NULL;
bw->drag_type = DRAGGING_NONE;
bw->scrolling_box = NULL;
bw->referer = NULL;
bw->download = false;
if ((bw->window = gui_create_browser_window(bw, clone)) == NULL) {
free(bw);
return NULL;
}
bw->refresh_interval = -1;
if (url)
browser_window_go(bw, url, referer, history_add);
return bw;
}
/**
* Start fetching a page in a browser window.
*
* \param bw browser window
* \param url URL to start fetching (copied)
* \param referer the referring uri
*
* Any existing fetches in the window are aborted.
*/
void browser_window_go(struct browser_window *bw, const char *url,
char* referer, bool history_add)
{
browser_window_go_post(bw, url, 0, 0, history_add, referer, false);
}
/**
* 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
* \param download download, rather than render the uri
*
* 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, char *referer, bool download)
{
struct content *c;
char *url2;
char *hash;
url_func_result res;
char url_buf[256];
LOG(("bw %p, url %s", bw, url));
assert(bw);
assert(url);
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;
}
if (!download)
gui_window_set_url(bw->window, url2);
/* find any fragment identifier on end of URL */
hash = strchr(url2, '#');
if (bw->frag_id) {
free(bw->frag_id);
bw->frag_id = 0;
}
if (hash) {
bw->frag_id = strdup(hash+1);
/* if we're simply moving to another ID on the same page,
* don't bother to fetch, just update the window.
*/
if (!post_urlenc && !post_multipart && !strchr(url2, '?') &&
bw->current_content && bw->current_content->url &&
strncasecmp(bw->current_content->url,
url2, hash - url2) == 0 &&
strlen(bw->current_content->url) ==
(unsigned int)(hash - 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_set_status(bw, messages_get("Loading"));
bw->history_add = history_add;
bw->time0 = clock();
c = fetchcache(url2, browser_window_callback, (intptr_t) bw, 0,
gui_window_get_width(bw->window),
gui_window_get_height(bw->window),
false,
post_urlenc, post_multipart, true, 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, option_send_referer ? referer : 0,
browser_window_callback, (intptr_t) bw, 0,
gui_window_get_width(bw->window),
gui_window_get_height(bw->window),
post_urlenc, post_multipart, true);
}
/**
* 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 status[40];
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;
}
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;
bw->caret_callback = NULL;
bw->paste_callback = NULL;
bw->move_callback = NULL;
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);
if (bw->history_add) {
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));
}
}
switch (c->type) {
case CONTENT_HTML:
selection_init(bw->sel, bw->current_content->data.html.layout);
break;
case CONTENT_TEXTPLAIN:
selection_init(bw->sel, NULL);
break;
default:
break;
}
break;
case CONTENT_MSG_DONE:
assert(bw->current_content == c);
browser_window_update(bw, false);
sprintf(status, messages_get("Complete"),
((float) (clock() - bw->time0)) /
CLOCKS_PER_SEC);
browser_window_set_status(bw, status);
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);
warn_user(data.error, 0);
if (c == bw->loading_content)
bw->loading_content = 0;
else if (c == bw->current_content) {
bw->current_content = 0;
bw->caret_callback = NULL;
bw->paste_callback = NULL;
bw->move_callback = NULL;
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_REDIRECT:
bw->loading_content = 0;
browser_window_set_status(bw,
messages_get("Redirecting"));
/* the spec says nothing about referrers and
* redirects => follow Mozilla and preserve the
* referer across the redirect */
browser_window_go_post(bw, data.redirect, 0, 0,
bw->history_add, bw->referer,
bw->download);
break;
case CONTENT_MSG_REFORMAT:
if (c == bw->current_content &&
c->type == CONTENT_HTML) {
/* 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;
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;
bw->caret_callback = NULL;
bw->paste_callback = NULL;
bw->move_callback = NULL;
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;
bw->caret_callback = NULL;
bw->paste_callback = NULL;
bw->move_callback = NULL;
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);
}
}
/**
* Refresh browser window
*
* \param p Browser window to refresh
*/
void browser_window_refresh(void *p)
{
struct browser_window *bw = p;
bool history_add = true;
assert(bw->current_content->status == CONTENT_STATUS_READY ||
bw->current_content->status == CONTENT_STATUS_DONE);
/* 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(bw, bw->current_content->refresh,
bw->current_content->url, history_add);
}
/**
* 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);
}
/**
* Start the busy indicator.
*
* \param bw browser window
*/
void browser_window_start_throbber(struct browser_window *bw)
{
bw->throbbing = true;
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;
gui_window_stop_throbber(bw->window);
}
/**
* 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_set_extent(bw->window, bw->current_content->width,
bw->current_content->height);
if (scroll_to_top)
gui_window_set_scroll(bw->window, 0, 0);
/* 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)
{
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);
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);
}
/**
* 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)
{
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)
{
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);
}
schedule_remove(browser_window_refresh, bw);
selection_destroy(bw->sel);
history_destroy(bw->history);
gui_window_destroy(bw->window);
free(bw->frag_id);
free(bw);
}
/**
* 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_REDIRECT:
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)
{
char *base_url = 0;
char *title = 0;
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);
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 (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_form_submit(bw, gadget->form,
gadget, false);
else if (mouse & BROWSER_MOUSE_CLICK_2)
browser_form_submit(bw, gadget->form,
gadget, true);
} 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;
int 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;
}
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);
}
else if (text_box) {
int pixel_offset;
int 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;
}
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);
} else if (mouse & BROWSER_MOUSE_CLICK_1) {
struct content *page = 0;
unsigned int i = 0;
html_find_target(url_content, target, &page, &i);
if (page) {
if (!html_replace_object(page, i, url, 0, 0))
warn_user("NoMemory", 0);
} else {
browser_window_go(bw, url, c->url, true);
}
} 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_2) {
/* open link in new window */
browser_window_create(url, bw, c->url, true);
}
} else {
bool done = false;
/* if clicking in the main page, remove the selection from any text areas */
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;
int 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 */
bw->caret_callback = NULL;
bw->paste_callback = NULL;
bw->move_callback = NULL;
if (selection_dragging(bw->sel)) {
bw->drag_type = DRAGGING_SELECTION;
status = messages_get("Selecting");
} else
status = c->status_message;
done = 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);
}
/**
* 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)
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_PAGE_SCROLL) {
/* mouse movement since drag started */
int scrollx = bw->scrolling_start_x - x;
int scrolly = bw->scrolling_start_y - y;
/* new scroll offsets */
scrollx += bw->scrolling_start_scroll_x;
scrolly += bw->scrolling_start_scroll_y;
bw->scrolling_start_scroll_x = scrollx;
bw->scrolling_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->scrolling_start_scroll_y +
(float) (y - bw->scrolling_start_y) /
(float) bw->scrolling_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->scrolling_start_scroll_x +
(float) (x - bw->scrolling_start_x) /
(float) bw->scrolling_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, mouse, x, y,
&dx, &dy, dir);
if (box) {
int pixel_offset;
int 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;
int 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, mouse, x, y,
&dx, &dy, dir);
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:
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->scrolling_start_x = box_x + x;
bw->scrolling_start_y = box_y + y;
bw->scrolling_start_scroll_x = box->scroll_x;
bw->scrolling_start_scroll_y = box->scroll_y;
bw->scrolling_well_width = well_width;
bw->scrolling_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 & but1)
scroll -= 16;
else if (mouse & but2)
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 & but1)
scroll += 16;
else if (mouse & but2)
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 form *form,
struct form_control *submit_button, bool new_window)
{
char *data = 0, *url = 0;
struct form_successful_control *success;
struct browser_window *target;
assert(form);
assert(bw->current_content->type == CONTENT_HTML);
if (!form_successful_controls(form, submit_button, &success)) {
warn_user("NoMemory", 0);
return;
}
if (new_window) {
target = browser_window_create(NULL, bw, NULL, false);
/* any error has already been reported */
if (!target)
return;
} else {
target = bw;
}
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);
break;
case method_POST_MULTIPART:
browser_window_go_post(target, form->action, 0, success,
true, bw->current_content->url,
false);
break;
default:
assert(0);
}
form_free_successful(success);
free(data);
free(url);
}
/**
* 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 x x ordinate relative to parent box
* \param y y ordinate relative to parent box
* \param dir direction in which to search (-1 = above-left, +1 = below-right)
* \return ptr to the nearest box, or NULL if none found
*/
struct box *browser_window_nearest_text_box(struct box *box, int x, int y, int dir)
{
struct box *child = box->children;
struct box *nearest = NULL;
int nr_yd = INT_MAX / 2; /* displacement of 'nearest so far' */
int nr_xd = INT_MAX / 2;
while (child) {
if (child->text && !child->object) {
int w = child->padding[LEFT] + child->width +
child->padding[RIGHT];
int h = child->padding[TOP] + child->height +
child->padding[BOTTOM];
int child_y1 = child->y + h;
int child_x1 = child->x + w;
int yd = INT_MAX;
int xd = INT_MAX;
if (dir < 0) {
/* consider only those children (partly) above-left */
if (child->y <= y && child->x < x) {
yd = y - child_y1;
xd = x - child_x1;
}
} else {
/* consider only those children (partly) below-right */
if (child_y1 > y && child_x1 > x) {
yd = child->y - y;
xd = child->x - x;
}
}
/* give y displacement precedence over x */
if (yd < nr_yd || (yd == nr_yd && xd <= nr_xd)) {
nr_yd = yd;
nr_xd = xd;
nearest = child;
}
}
child = child->next;
}
return nearest;
}
/**
* 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 mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
* \param dx receives x ordinate of mouse relative to innermost containing box
* \param dy receives y ordinate
* \param dir direction to search (-1 = above-left, +1 = below-right)
*/
struct box *browser_window_pick_text_box(struct browser_window *bw,
browser_mouse_state mouse, int x, int y, int *dx, int *dy,
int dir)
{
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 box_x = 0, box_y = 0;
struct content *content;
struct box *next_box;
/* 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->text && !box->object) {
text_box = box;
break;
}
}
if (!text_box) {
box = browser_window_nearest_text_box(box, x - box_x, y - box_y, dir);
if (box && box->text && !box->object) {
int w = (box->padding[LEFT] + box->width + box->padding[RIGHT]);
int h = (box->padding[TOP] + box->height + box->padding[BOTTOM]);
int x1, y1;
box_x += box->x - box->scroll_x;
box_y += box->y - box->scroll_y;
y1 = box_y + h;
x1 = box_x + w;
/* ensure point lies within the text box */
if (x < box_x) x = box_x;
if (y < box_y) y = box_y;
if (y > y1) y = y1;
if (x > x1) x = x1;
text_box = box;
}
}
/* return coordinates relative to box */
*dx = x - box_x;
*dy = y - box_y;
}
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->scrolling_start_x = x;
bw->scrolling_start_y = y;
gui_window_get_scroll(bw->window, &bw->scrolling_start_scroll_x, &bw->scrolling_start_scroll_y);
gui_window_scroll_start(bw->window);
}
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