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netsurf/desktop/browser.c
Michael Drake 167336cce2 Iframes have to have a parent content.
2012-10-11 13:06:51 +01:00

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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 <joty@netsurf-browser.org>
* Copyright 2006 Richard Wilson <info@tinct.net>
* Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
* Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
*
* 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 <strings.h>
#include <math.h>
#include "curl/curl.h"
#include "utils/config.h"
#include "content/content.h"
#include "content/fetch.h"
#include "content/hlcache.h"
#include "content/urldb.h"
#include "desktop/401login.h"
#include "desktop/browser_private.h"
#include "desktop/download.h"
#include "desktop/frames.h"
#include "desktop/history_core.h"
#include "desktop/hotlist.h"
#include "desktop/gui.h"
#include "desktop/knockout.h"
#include "desktop/options.h"
#include "desktop/scrollbar.h"
#include "desktop/selection.h"
#include "desktop/textinput.h"
#include "desktop/plotters.h"
#include "javascript/js.h"
#include "render/form.h"
#include "render/textplain.h"
#include "render/html.h"
#include "render/box.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/nsurl.h"
#include "utils/schedule.h"
#include "utils/url.h"
#include "utils/utils.h"
#include "utils/utf8.h"
/** one or more windows require a reformat */
bool browser_reformat_pending;
/** maximum frame depth */
#define FRAME_DEPTH 8
static nserror browser_window_callback(hlcache_handle *c,
const hlcache_event *event, void *pw);
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,
llcache_handle *stream);
static void browser_window_start_throbber(struct browser_window *bw);
static void browser_window_stop_throbber(struct browser_window *bw);
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 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_drag_end(struct browser_window *bw,
browser_mouse_state mouse, int x, int y);
/**
* Get position of scrollbar widget within browser window.
*
* \param bw The browser window
* \param horizontal Whether to get position of horizontal scrollbar
* \param x Updated to x-coord of top left of scrollbar widget
* \param y Updated to y-coord of top left of scrollbar widget
*/
static inline void browser_window_get_scrollbar_pos(struct browser_window *bw,
bool horizontal, int *x, int *y)
{
if (horizontal) {
*x = 0;
*y = bw->height - SCROLLBAR_WIDTH;
} else {
*x = bw->width - SCROLLBAR_WIDTH;
*y = 0;
}
}
/**
* Get browser window scrollbar widget length
*
* \param bw The browser window
* \param horizontal Whether to get length of horizontal scrollbar
* \return the scrollbar's length
*/
static inline int browser_window_get_scrollbar_len(struct browser_window *bw,
bool horizontal)
{
if (horizontal)
return bw->width - (bw->scroll_y != NULL ? SCROLLBAR_WIDTH : 0);
else
return bw->height;
}
/* exported interface, documented in browser.h */
bool browser_window_redraw(struct browser_window *bw, int x, int y,
const struct rect *clip, const struct redraw_context *ctx)
{
struct redraw_context new_ctx = *ctx;
int width = 0;
int height = 0;
bool plot_ok = true;
content_type content_type;
struct content_redraw_data data;
struct rect content_clip;
if (bw == NULL) {
LOG(("NULL browser window"));
return false;
}
if (bw->current_content == NULL && bw->children == NULL) {
/* Browser window has no content, render blank fill */
ctx->plot->clip(clip);
return ctx->plot->rectangle(clip->x0, clip->y0,
clip->x1, clip->y1,
plot_style_fill_white);
}
/* Browser window has content OR children (frames) */
if ((bw->window != NULL) &&
(ctx->plot->option_knockout)) {
/* Root browser window: start knockout */
knockout_plot_start(ctx, &new_ctx);
}
new_ctx.plot->clip(clip);
/* Handle redraw of any browser window children */
if (bw->children) {
struct browser_window *child;
int cur_child;
int children = bw->rows * bw->cols;
if (bw->window != NULL)
/* Root browser window; start with blank fill */
plot_ok &= new_ctx.plot->rectangle(clip->x0, clip->y0,
clip->x1, clip->y1,
plot_style_fill_white);
/* Loop through all children of bw */
for (cur_child = 0; cur_child < children; cur_child++) {
/* Set current child */
child = &bw->children[cur_child];
/* Get frame edge box in global coordinates */
content_clip.x0 = (x + child->x) * child->scale;
content_clip.y0 = (y + child->y) * child->scale;
content_clip.x1 = content_clip.x0 +
child->width * child->scale;
content_clip.y1 = content_clip.y0 +
child->height * child->scale;
/* Intersect it with clip rectangle */
if (content_clip.x0 < clip->x0)
content_clip.x0 = clip->x0;
if (content_clip.y0 < clip->y0)
content_clip.y0 = clip->y0;
if (clip->x1 < content_clip.x1)
content_clip.x1 = clip->x1;
if (clip->y1 < content_clip.y1)
content_clip.y1 = clip->y1;
/* Skip this frame if it lies outside clip rectangle */
if (content_clip.x0 >= content_clip.x1 ||
content_clip.y0 >= content_clip.y1)
continue;
/* Redraw frame */
plot_ok &= browser_window_redraw(child,
x + child->x, y + child->y,
&content_clip, &new_ctx);
}
/* Nothing else to redraw for browser windows with children;
* cleanup and return */
if (bw->window != NULL && ctx->plot->option_knockout) {
/* Root browser window: knockout end */
knockout_plot_end();
}
return plot_ok;
}
/* Handle browser windows with content to redraw */
content_type = content_get_type(bw->current_content);
if (content_type != CONTENT_HTML && content_type != CONTENT_TEXTPLAIN) {
/* Set render area according to scale */
width = content_get_width(bw->current_content) * bw->scale;
height = content_get_height(bw->current_content) * bw->scale;
/* Non-HTML may not fill viewport to extents, so plot white
* background fill */
plot_ok &= new_ctx.plot->rectangle(clip->x0, clip->y0,
clip->x1, clip->y1, plot_style_fill_white);
}
/* Set up content redraw data */
data.x = x - scrollbar_get_offset(bw->scroll_x);
data.y = y - scrollbar_get_offset(bw->scroll_y);
data.width = width;
data.height = height;
data.background_colour = 0xFFFFFF;
data.scale = bw->scale;
data.repeat_x = false;
data.repeat_y = false;
content_clip = *clip;
if (!bw->window) {
int x0 = x * bw->scale;
int y0 = y * bw->scale;
int x1 = (x + bw->width - ((bw->scroll_y != NULL) ?
SCROLLBAR_WIDTH : 0)) * bw->scale;
int y1 = (y + bw->height - ((bw->scroll_x != NULL) ?
SCROLLBAR_WIDTH : 0)) * bw->scale;
if (content_clip.x0 < x0) content_clip.x0 = x0;
if (content_clip.y0 < y0) content_clip.y0 = y0;
if (x1 < content_clip.x1) content_clip.x1 = x1;
if (y1 < content_clip.y1) content_clip.y1 = y1;
}
/* Render the content */
plot_ok &= content_redraw(bw->current_content, &data,
&content_clip, &new_ctx);
/* Back to full clip rect */
new_ctx.plot->clip(clip);
if (!bw->window) {
/* Render scrollbars */
int off_x, off_y;
if (bw->scroll_x != NULL) {
browser_window_get_scrollbar_pos(bw, true,
&off_x, &off_y);
plot_ok &= scrollbar_redraw(bw->scroll_x,
x + off_x, y + off_y, clip,
bw->scale, &new_ctx);
}
if (bw->scroll_y != NULL) {
browser_window_get_scrollbar_pos(bw, false,
&off_x, &off_y);
plot_ok &= scrollbar_redraw(bw->scroll_y,
x + off_x, y + off_y, clip,
bw->scale, &new_ctx);
}
}
if (bw->window != NULL && ctx->plot->option_knockout) {
/* Root browser window: end knockout */
knockout_plot_end();
}
return plot_ok;
}
/* exported interface, documented in browser.h */
bool browser_window_redraw_ready(struct browser_window *bw)
{
if (bw == NULL) {
LOG(("NULL browser window"));
return false;
} else if (bw->current_content != NULL) {
/* Can't render locked contents */
return !content_is_locked(bw->current_content);
}
return true;
}
/* exported interface, documented in browser.h */
void browser_window_update_extent(struct browser_window *bw)
{
if (bw->window != NULL)
/* Front end window */
gui_window_update_extent(bw->window);
else
/* Core-managed browser window */
browser_window_handle_scrollbars(bw);
}
/* exported interface, documented in browser.h */
void browser_window_get_position(struct browser_window *bw, bool root,
int *pos_x, int *pos_y)
{
*pos_x = 0;
*pos_y = 0;
assert(bw != NULL);
while (bw) {
switch (bw->browser_window_type) {
case BROWSER_WINDOW_FRAMESET:
*pos_x += bw->x * bw->scale;
*pos_y += bw->y * bw->scale;
break;
case BROWSER_WINDOW_NORMAL:
/* There is no offset to the root browser window */
break;
case BROWSER_WINDOW_FRAME:
/* Iframe and Frame handling is identical;
* fall though */
case BROWSER_WINDOW_IFRAME:
*pos_x += (bw->x - scrollbar_get_offset(bw->scroll_x)) *
bw->scale;
*pos_y += (bw->y - scrollbar_get_offset(bw->scroll_y)) *
bw->scale;
break;
}
bw = bw->parent;
if (!root) {
/* return if we just wanted the position in the parent
* browser window. */
return;
}
}
}
/* exported interface, documented in browser.h */
void browser_window_set_position(struct browser_window *bw, int x, int y)
{
assert(bw != NULL);
if (bw->window == NULL) {
/* Core managed browser window */
bw->x = x;
bw->y = y;
} else {
LOG(("Asked to set position of front end window."));
assert(0);
}
}
/* exported interface, documented in browser.h */
void browser_window_set_drag_type(struct browser_window *bw,
browser_drag_type type, const struct rect *rect)
{
struct browser_window *top_bw = browser_window_get_root(bw);
gui_drag_type gtype;
bw->drag_type = type;
if (type == DRAGGING_NONE) {
top_bw->drag_window = NULL;
} else {
top_bw->drag_window = bw;
switch (type) {
case DRAGGING_SCR_X:
case DRAGGING_SCR_Y:
case DRAGGING_CONTENT_SCROLLBAR:
gtype = GDRAGGING_SCROLLBAR;
break;
default:
gtype = GDRAGGING_OTHER;
break;
}
gui_window_drag_start(top_bw->window, gtype, rect);
}
}
/* exported interface, documented in browser.h */
browser_drag_type browser_window_get_drag_type(struct browser_window *bw)
{
return bw->drag_type;
}
/* exported interface, documented in browser.h */
struct browser_window * browser_window_get_root(struct browser_window *bw)
{
while (bw && bw->parent) {
bw = bw->parent;
}
return bw;
}
/* exported interface, documented in browser.h */
bool browser_window_has_selection(struct browser_window *bw)
{
assert(bw->window);
if (bw->cur_sel != NULL && selection_defined(bw->cur_sel)) {
return true;
} else {
return false;
}
}
/* exported interface, documented in browser.h */
void browser_window_set_selection(struct browser_window *bw,
struct selection *s)
{
assert(bw->window);
if (bw->cur_sel != s && bw->cur_sel != NULL) {
/* Clear any existing selection */
selection_clear(bw->cur_sel, true);
}
/* Replace current selection pointer */
if (s == NULL && bw->current_content != NULL) {
bw->cur_sel = content_get_selection(bw->current_content);
} else {
bw->cur_sel = s;
}
}
/* exported interface, documented in browser.h */
struct selection *browser_window_get_selection(struct browser_window *bw)
{
assert(bw->window);
return bw->cur_sel;
}
/* exported interface, documented in browser.h */
void browser_window_scroll_visible(struct browser_window *bw,
const struct rect *rect)
{
assert(bw != NULL);
if (bw->window != NULL) {
/* Front end window */
gui_window_scroll_visible(bw->window,
rect->x0, rect->y0, rect->x1, rect->y1);
} else {
/* Core managed browser window */
if (bw->scroll_x != NULL)
scrollbar_set(bw->scroll_x, rect->x0, false);
if (bw->scroll_y != NULL)
scrollbar_set(bw->scroll_y, rect->y0, false);
}
}
/* exported interface, documented in browser.h */
void browser_window_set_scroll(struct browser_window *bw, int x, int y)
{
if (bw->window != NULL) {
gui_window_set_scroll(bw->window, x, y);
} else {
if (bw->scroll_x != NULL)
scrollbar_set(bw->scroll_x, x, false);
if (bw->scroll_y != NULL)
scrollbar_set(bw->scroll_y, y, false);
}
}
/**
* Internal helper for browser_window_get_contextual_content
*/
static void browser_window__get_contextual_content(struct browser_window *bw,
int x, int y, struct contextual_content *data)
{
/* Handle (i)frame scroll offset (core-managed browser windows only) */
x += scrollbar_get_offset(bw->scroll_x);
y += scrollbar_get_offset(bw->scroll_y);
if (bw->children) {
/* Browser window has children, so pass request on to
* appropriate child */
struct browser_window *bwc;
int cur_child;
int children = bw->rows * bw->cols;
/* Loop through all children of bw */
for (cur_child = 0; cur_child < children; cur_child++) {
/* Set current child */
bwc = &bw->children[cur_child];
/* Skip this frame if (x, y) coord lies outside */
if (x < bwc->x || bwc->x + bwc->width < x ||
y < bwc->y || bwc->y + bwc->height < y)
continue;
/* Pass request into this child */
browser_window__get_contextual_content(bwc,
(x - bwc->x), (y - bwc->y), data);
return;
}
/* Coordinate not contained by any frame */
return;
}
if (bw->current_content == NULL)
/* No content; nothing to set */
return;
/* Pass request to content */
content_get_contextual_content(bw->current_content, x, y, data);
data->main = bw->current_content;
}
/* exported interface, documented in browser.h */
void browser_window_get_contextual_content(struct browser_window *bw,
int x, int y, struct contextual_content *data)
{
data->link_url = NULL;
data->object = NULL;
data->main = NULL;
data->form_features = CTX_FORM_NONE;
browser_window__get_contextual_content(bw, x, y, data);
}
/* exported interface, documented in browser.h */
bool browser_window_scroll_at_point(struct browser_window *bw,
int x, int y, int scrx, int scry)
{
bool handled_scroll = false;
assert(bw != NULL);
/* Handle (i)frame scroll offset (core-managed browser windows only) */
x += scrollbar_get_offset(bw->scroll_x);
y += scrollbar_get_offset(bw->scroll_y);
if (bw->children) {
/* Browser window has children, so pass request on to
* appropriate child */
struct browser_window *bwc;
int cur_child;
int children = bw->rows * bw->cols;
/* Loop through all children of bw */
for (cur_child = 0; cur_child < children; cur_child++) {
/* Set current child */
bwc = &bw->children[cur_child];
/* Skip this frame if (x, y) coord lies outside */
if (x < bwc->x || bwc->x + bwc->width < x ||
y < bwc->y || bwc->y + bwc->height < y)
continue;
/* Pass request into this child */
return browser_window_scroll_at_point(bwc,
(x - bwc->x), (y - bwc->y),
scrx, scry);
}
}
/* Try to scroll any current content */
if (bw->current_content != NULL && content_scroll_at_point(
bw->current_content, x, y, scrx, scry) == true)
/* Scroll handled by current content */
return true;
/* Try to scroll this window, if scroll not already handled */
if (handled_scroll == false) {
if (bw->scroll_y && scrollbar_scroll(bw->scroll_y, scry))
handled_scroll = true;
if (bw->scroll_x && scrollbar_scroll(bw->scroll_x, scrx))
handled_scroll = true;
}
return handled_scroll;
}
/* exported interface, documented in browser.h */
bool browser_window_drop_file_at_point(struct browser_window *bw,
int x, int y, char *file)
{
assert(bw != NULL);
/* Handle (i)frame scroll offset (core-managed browser windows only) */
x += scrollbar_get_offset(bw->scroll_x);
y += scrollbar_get_offset(bw->scroll_y);
if (bw->children) {
/* Browser window has children, so pass request on to
* appropriate child */
struct browser_window *bwc;
int cur_child;
int children = bw->rows * bw->cols;
/* Loop through all children of bw */
for (cur_child = 0; cur_child < children; cur_child++) {
/* Set current child */
bwc = &bw->children[cur_child];
/* Skip this frame if (x, y) coord lies outside */
if (x < bwc->x || bwc->x + bwc->width < x ||
y < bwc->y || bwc->y + bwc->height < y)
continue;
/* Pass request into this child */
return browser_window_drop_file_at_point(bwc,
(x - bwc->x), (y - bwc->y),
file);
}
}
/* Pass file drop on to any content */
if (bw->current_content != NULL)
return content_drop_file_at_point(bw->current_content,
x, y, file);
return false;
}
/* exported interface, documented in browser.h */
void browser_window_debug_dump(struct browser_window *bw, FILE *f)
{
if (bw->current_content != NULL)
content_debug_dump(bw->current_content, f);
}
/**
* Create and open a new root 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
* \param history_add add to history
* \param new_tab create a new tab
* \return new browser window or NULL on error
*/
struct browser_window *browser_window_create(const char *url,
struct browser_window *clone,
const char *referer, bool history_add, bool new_tab)
{
struct browser_window *bw;
struct browser_window *top;
assert(clone || history_add);
if ((bw = calloc(1, sizeof *bw)) == NULL) {
warn_user("NoMemory", 0);
return NULL;
}
bw->jsctx = js_newcontext();
/* 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;
bw->last_action = wallclock();
bw->focus = bw;
/* gui window */
/* from the front end's pov, it clones the top level browser window,
* so find that. */
top = browser_window_get_root(clone);
bw->window = gui_create_browser_window(bw, top, new_tab);
if (bw->window == 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->cur_sel = NULL;
bw->cur_search = NULL;
bw->refresh_interval = -1;
bw->reformat_pending = false;
bw->drag_type = DRAGGING_NONE;
bw->scale = (float) nsoption_int(scale) / 100.0;
bw->scroll_x = NULL;
bw->scroll_y = NULL;
bw->focus = NULL;
/* initialise status text cache */
bw->status_text = NULL;
bw->status_text_len = 0;
bw->status_match = 0;
bw->status_miss = 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
* \param history_add Add to history
*
* 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, NULL);
}
/**
* Start a download of the given URL from a browser window.
*
* \param bw browser window
* \param url URL to start downloading (copied)
* \param referer the referring uri (copied), or 0 if none
*/
void browser_window_download(struct browser_window *bw, const char *url,
const char *referer)
{
browser_window_go_post(bw, url, 0, 0, false, referer,
true, true, NULL);
}
/**
* 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
* \param history_add add to history
* \param parent parent handle
*
* 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,
hlcache_handle *parent)
{
/* 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, parent);
}
/**
* 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 add_to_history 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 Parent content, or NULL
*
* 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_to_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 fetch_multipart_data *post_multipart,
bool add_to_history, const char *referer, bool download,
bool verifiable, hlcache_handle *parent)
{
hlcache_handle *c;
int depth = 0;
struct browser_window *cur;
uint32_t fetch_flags = 0;
bool fetch_is_post = (post_urlenc != NULL || post_multipart != NULL);
llcache_post_data post;
hlcache_child_context child;
nserror error;
nsurl *nsref = NULL;
nsurl *nsurl;
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;
}
/* Set up retrieval parameters */
if (verifiable)
fetch_flags |= LLCACHE_RETRIEVE_VERIFIABLE;
if (post_multipart != NULL) {
post.type = LLCACHE_POST_MULTIPART;
post.data.multipart = post_multipart;
} else if (post_urlenc != NULL) {
post.type = LLCACHE_POST_URL_ENCODED;
post.data.urlenc = post_urlenc;
}
if (parent != NULL && content_get_type(parent) == CONTENT_HTML) {
child.charset = html_get_encoding(parent);
child.quirks = content_get_quirks(parent);
}
error = nsurl_create(url, &nsurl);
if (error != NSERROR_OK) {
return;
}
if (referer != NULL) {
error = nsurl_create(referer, &nsref);
if (error != NSERROR_OK) {
nsurl_unref(nsurl);
return;
}
}
/* Get download out of the way */
if (download) {
llcache_handle *l;
struct browser_window *root;
root = browser_window_get_root(bw);
assert(root != NULL);
fetch_flags |= LLCACHE_RETRIEVE_FORCE_FETCH;
fetch_flags |= LLCACHE_RETRIEVE_STREAM_DATA;
error = llcache_handle_retrieve(nsurl, fetch_flags, nsref,
fetch_is_post ? &post : NULL,
NULL, NULL, &l);
if (error == NSERROR_NO_FETCH_HANDLER) {
gui_launch_url(nsurl_access(nsurl));
} else if (error != NSERROR_OK) {
LOG(("Failed to fetch download: %d", error));
} else {
error = download_context_create(l, root->window);
if (error != NSERROR_OK) {
LOG(("Failed creating download context: %d",
error));
llcache_handle_abort(l);
llcache_handle_release(l);
}
}
nsurl_unref(nsurl);
if (nsref != NULL)
nsurl_unref(nsref);
return;
}
if (bw->frag_id != NULL)
lwc_string_unref(bw->frag_id);
bw->frag_id = NULL;
if (nsurl_has_component(nsurl, NSURL_FRAGMENT)) {
bool same_url = false;
bw->frag_id = nsurl_get_component(nsurl, NSURL_FRAGMENT);
/* Compare new URL with existing one (ignoring fragments) */
if (bw->current_content != NULL &&
hlcache_handle_get_url(bw->current_content) != NULL) {
same_url = nsurl_compare(nsurl,
hlcache_handle_get_url(bw->current_content),
NSURL_COMPLETE);
}
/* if we're simply moving to another ID on the same page,
* don't bother to fetch, just update the window.
*/
if (same_url && fetch_is_post == false &&
nsurl_has_component(nsurl, NSURL_QUERY) ==
false) {
nsurl_unref(nsurl);
if (nsref != NULL)
nsurl_unref(nsref);
if (add_to_history)
history_add(bw->history, bw->current_content,
bw->frag_id == NULL ? NULL :
lwc_string_data(bw->frag_id));
browser_window_update(bw, false);
if (bw->current_content != NULL) {
browser_window_refresh_url_bar(bw,
hlcache_handle_get_url(bw->current_content),
bw->frag_id);
}
return;
}
}
browser_window_stop(bw);
browser_window_remove_caret(bw);
browser_window_destroy_children(bw);
LOG(("Loading '%s'", nsurl_access(nsurl)));
browser_window_set_status(bw, messages_get("Loading"));
bw->history_add = add_to_history;
/* Verifiable fetches may trigger a download */
if (verifiable)
fetch_flags |= HLCACHE_RETRIEVE_MAY_DOWNLOAD;
error = hlcache_handle_retrieve(nsurl,
fetch_flags | HLCACHE_RETRIEVE_SNIFF_TYPE,
nsref,
fetch_is_post ? &post : NULL,
browser_window_callback, bw,
parent != NULL ? &child : NULL,
CONTENT_ANY, &c);
switch (error) {
case NSERROR_NO_FETCH_HANDLER: /* no handler for this type */
gui_launch_url(nsurl_access(nsurl));
nsurl_unref(nsurl);
if (nsref != NULL)
nsurl_unref(nsref);
break;
case NSERROR_OK:
bw->loading_content = c;
browser_window_start_throbber(bw);
browser_window_refresh_url_bar(bw, nsurl, NULL);
nsurl_unref(nsurl);
if (nsref != NULL)
nsurl_unref(nsref);
break;
default: /* assume out of memory */
/* TODO: fix all fetcher errors being reported as OOM? */
nsurl_unref(nsurl);
if (nsref != NULL)
nsurl_unref(nsref);
browser_window_set_status(bw, messages_get("NoMemory"));
warn_user("NoMemory", 0);
}
/* Record time */
bw->last_action = wallclock();
}
/**
* Callback for fetchcache() for browser window favicon fetches.
*/
static nserror browser_window_favicon_callback(hlcache_handle *c,
const hlcache_event *event, void *pw)
{
struct browser_window *bw = pw;
switch (event->type) {
case CONTENT_MSG_DONE:
if (bw->current_favicon != NULL) {
content_status status =
content_get_status(bw->current_favicon);
if ((status == CONTENT_STATUS_READY) ||
(status == CONTENT_STATUS_DONE))
content_close(bw->current_favicon);
hlcache_handle_release(bw->current_favicon);
}
bw->current_favicon = c;
bw->loading_favicon = NULL;
/* content_get_bitmap on the hlcache_handle should give
* us the favicon bitmap at this point
*/
gui_window_set_icon(bw->window, c);
break;
case CONTENT_MSG_ERROR:
/* clean up after ourselves */
if (c == bw->loading_favicon)
bw->loading_favicon = NULL;
else if (c == bw->current_favicon) {
bw->current_favicon = NULL;
}
hlcache_handle_release(c);
if (bw->failed_favicon == false) {
nsurl *nsref = NULL;
nsurl *nsurl;
nserror error;
bw->failed_favicon = true;
error = nsurl_create("resource:favicon.ico", &nsurl);
if (error != NSERROR_OK) {
LOG(("Unable to create default location url"));
} else {
hlcache_handle_retrieve(nsurl,
HLCACHE_RETRIEVE_SNIFF_TYPE,
nsref, NULL,
browser_window_favicon_callback,
bw, NULL, CONTENT_IMAGE,
&bw->loading_favicon);
nsurl_unref(nsurl);
}
}
break;
default:
break;
}
return NSERROR_OK;
}
static void browser_window_update_favicon(hlcache_handle *c,
struct browser_window *bw, struct content_rfc5988_link *link)
{
lwc_string *icon_str;
nsurl *nsref = NULL;
nsurl *nsurl;
nserror error;
assert(c != NULL);
assert(bw !=NULL);
if (bw->window == NULL)
/* Not top-level browser window; not interested */
return;
/* already fetching the favicon - use that */
if (bw->loading_favicon != NULL)
return;
bw->failed_favicon = false;
if (link == NULL) {
/* look for favicon metadata link */
if (lwc_intern_string("icon", SLEN("icon"),
&icon_str) == lwc_error_ok) {
link = content_find_rfc5988_link(c, icon_str);
lwc_string_unref(icon_str);
}
}
if (link == NULL) {
if (lwc_intern_string("shortcut icon", SLEN("shortcut icon"),
&icon_str) == lwc_error_ok) {
link = content_find_rfc5988_link(c, icon_str);
lwc_string_unref(icon_str);
}
}
if (link == NULL) {
lwc_string *scheme;
bool speculative_default = false;
nsurl = hlcache_handle_get_url(c);
scheme = nsurl_get_component(nsurl, NSURL_SCHEME);
/* If the document was fetched over http(s), then speculate
* that there's a favicon living at /favicon.ico */
if ((lwc_string_length(scheme) == SLEN("HTTP") &&
strcasecmp(lwc_string_data(scheme),
"http") == 0) ||
(lwc_string_length(scheme) == SLEN("HTTPS") &&
strcasecmp(lwc_string_data(scheme),
"https") == 0)) {
speculative_default = true;
}
lwc_string_unref(scheme);
if (speculative_default) {
/* no favicon via link, try for the default location */
error = nsurl_join(nsurl, "/favicon.ico", &nsurl);
} else {
bw->failed_favicon = true;
error = nsurl_create("resource:favicon.ico", &nsurl);
}
if (error != NSERROR_OK) {
LOG(("Unable to create default location url"));
return;
}
} else {
nsurl = nsurl_ref(link->href);
}
if (link == NULL) {
LOG(("fetching general favicon from '%s'",
nsurl_access(nsurl)));
} else {
LOG(("fetching favicon rel:%s '%s'",
lwc_string_data(link->rel),
nsurl_access(nsurl)));
}
hlcache_handle_retrieve(nsurl, HLCACHE_RETRIEVE_SNIFF_TYPE,
nsref, NULL, browser_window_favicon_callback,
bw, NULL, CONTENT_IMAGE, &bw->loading_favicon);
nsurl_unref(nsurl);
}
/**
* Callback for fetchcache() for browser window fetches.
*/
nserror browser_window_callback(hlcache_handle *c,
const hlcache_event *event, void *pw)
{
struct browser_window *bw = pw;
switch (event->type) {
case CONTENT_MSG_DOWNLOAD:
assert(bw->loading_content == c);
browser_window_convert_to_download(bw, event->data.download);
if (bw->current_content != NULL) {
browser_window_refresh_url_bar(bw,
hlcache_handle_get_url(bw->current_content),
bw->frag_id);
}
break;
case CONTENT_MSG_LOADING:
assert(bw->loading_content == c);
#ifdef WITH_THEME_INSTALL
if (content_get_type(c) == CONTENT_THEME) {
theme_install_start(c);
bw->loading_content = NULL;
browser_window_stop_throbber(bw);
} else
#endif
{
bw->refresh_interval = -1;
browser_window_set_status(bw,
content_get_status_message(c));
}
break;
case CONTENT_MSG_READY:
{
int width, height;
assert(bw->loading_content == c);
if (bw->current_content != NULL) {
content_status status =
content_get_status(bw->current_content);
if (status == CONTENT_STATUS_READY ||
status == CONTENT_STATUS_DONE)
content_close(bw->current_content);
hlcache_handle_release(bw->current_content);
}
bw->current_content = c;
bw->loading_content = NULL;
/* Format the new content to the correct dimensions */
browser_window_get_dimensions(bw, &width, &height, true);
content_reformat(c, false, width, height);
browser_window_remove_caret(bw);
if (bw->window)
gui_window_new_content(bw->window);
browser_window_refresh_url_bar(bw,
hlcache_handle_get_url(bw->current_content),
bw->frag_id);
/* new content; set scroll_to_top */
browser_window_update(bw, true);
content_open(c, bw, 0, 0);
browser_window_set_status(bw, content_get_status_message(c));
/* history */
if (bw->history_add && bw->history) {
nsurl *url = hlcache_handle_get_url(c);
history_add(bw->history, c, bw->frag_id == NULL ? NULL :
lwc_string_data(bw->frag_id));
if (urldb_add_url(url)) {
urldb_set_url_title(url, content_get_title(c));
urldb_update_url_visit_data(url);
urldb_set_url_content_type(url,
content_get_type(c));
/* This is safe as we've just added the URL */
global_history_add(urldb_get_url(url));
}
}
if (bw->window != NULL) {
browser_window_set_selection(bw,
content_get_selection(c));
}
/* frames */
if (content_get_type(c) == CONTENT_HTML &&
html_get_frameset(c) != NULL)
browser_window_create_frameset(bw,
html_get_frameset(c));
if (content_get_type(c) == CONTENT_HTML &&
html_get_iframe(c) != NULL)
browser_window_create_iframes(bw, html_get_iframe(c));
}
break;
case CONTENT_MSG_DONE:
assert(bw->current_content == c);
if (bw->window == NULL) {
/* Updated browser window's scrollbars.
* TODO: do this before CONTENT_MSG_DONE */
browser_window_reformat(bw, true,
bw->width, bw->height);
browser_window_handle_scrollbars(bw);
}
browser_window_update(bw, false);
browser_window_set_status(bw, content_get_status_message(c));
browser_window_stop_throbber(bw);
browser_window_update_favicon(c, bw, NULL);
history_update(bw->history, c);
hotlist_visited(c);
if (bw->refresh_interval != -1)
schedule(bw->refresh_interval,
browser_window_refresh, bw);
break;
case CONTENT_MSG_ERROR:
browser_window_set_status(bw, event->data.error);
/* Only warn the user about errors in top-level windows */
if (bw->browser_window_type == BROWSER_WINDOW_NORMAL)
warn_user(event->data.error, 0);
if (c == bw->loading_content)
bw->loading_content = NULL;
else if (c == bw->current_content) {
bw->current_content = NULL;
browser_window_remove_caret(bw);
}
hlcache_handle_release(c);
browser_window_stop_throbber(bw);
break;
case CONTENT_MSG_STATUS:
if (event->data.explicit_status_text == NULL) {
/* Object content's status text updated */
const char *status = NULL;
if (bw->loading_content != NULL)
/* Give preference to any loading content */
status = content_get_status_message(
bw->loading_content);
if (status == NULL)
status = content_get_status_message(c);
if (status != NULL)
browser_window_set_status(bw, status);
} else {
/* Object content wants to set explicit message */
browser_window_set_status(bw,
event->data.explicit_status_text);
}
break;
case CONTENT_MSG_REFORMAT:
if (c == bw->current_content &&
content_get_type(c) == CONTENT_HTML) {
/* reposition frames */
if (html_get_frameset(c) != NULL)
browser_window_recalculate_frameset(bw);
/* reflow iframe positions */
if (html_get_iframe(c) != NULL)
browser_window_recalculate_iframes(bw);
}
if (bw->move_callback)
bw->move_callback(bw, bw->caret_p1, bw->caret_p2);
if (!(event->data.background)) {
/* Reformatted content should be redrawn */
browser_window_update(bw, false);
}
break;
case CONTENT_MSG_REDRAW:
{
struct rect rect = {
.x0 = event->data.redraw.x,
.y0 = event->data.redraw.y,
.x1 = event->data.redraw.x + event->data.redraw.width,
.y1 = event->data.redraw.y + event->data.redraw.height
};
browser_window_update_box(bw, &rect);
}
break;
case CONTENT_MSG_REFRESH:
bw->refresh_interval = event->data.delay * 100;
break;
case CONTENT_MSG_LINK: /* content has an rfc5988 link element */
{
lwc_string *icon_str;
lwc_string *shortcut_icon_str;
bool icon_match = false;
bool shortcut_icon_match = false;
if (lwc_intern_string("icon", SLEN("icon"),
&icon_str) == lwc_error_ok) {
if (lwc_string_caseless_isequal(
event->data.rfc5988_link->rel,
icon_str, &icon_match) != lwc_error_ok) {
icon_match = false;
}
lwc_string_unref(icon_str);
}
if (lwc_intern_string("shortcut icon", SLEN("shortcut icon"),
&shortcut_icon_str) == lwc_error_ok) {
if (lwc_string_caseless_isequal(
event->data.rfc5988_link->rel,
shortcut_icon_str,
&shortcut_icon_match) != lwc_error_ok) {
shortcut_icon_match = false;
}
lwc_string_unref(shortcut_icon_str);
}
if (icon_match || shortcut_icon_match) {
/* it's a favicon perhaps start a fetch for it */
browser_window_update_favicon(c, bw,
event->data.rfc5988_link);
}
}
break;
case CONTENT_MSG_GETCTX:
/* only the content object created by the browser
* window requires a new global compartment object
*/
assert(bw->loading_content == c);
if (js_newcompartment(bw->jsctx,
bw,
hlcache_handle_get_content(c)) != NULL) {
*(event->data.jscontext) = bw->jsctx;
}
break;
case CONTENT_MSG_SCROLL:
/* Content wants to be scrolled */
if (bw->current_content != c)
break;
if (event->data.scroll.area) {
struct rect rect = {
.x0 = event->data.scroll.x0,
.y0 = event->data.scroll.y0,
.x1 = event->data.scroll.x1,
.y1 = event->data.scroll.y1
};
browser_window_scroll_visible(bw, &rect);
} else {
browser_window_set_scroll(bw,
event->data.scroll.x0,
event->data.scroll.y0);
}
break;
case CONTENT_MSG_DRAGSAVE:
{
/* Content wants drag save of a content */
struct browser_window *root = browser_window_get_root(bw);
hlcache_handle *save = event->data.dragsave.content;
if (save == NULL) {
save = c;
}
switch(event->data.dragsave.type) {
case CONTENT_SAVE_ORIG:
gui_drag_save_object(GUI_SAVE_OBJECT_ORIG, save,
root->window);
break;
case CONTENT_SAVE_NATIVE:
gui_drag_save_object(GUI_SAVE_OBJECT_NATIVE, save,
root->window);
break;
case CONTENT_SAVE_COMPLETE:
gui_drag_save_object(GUI_SAVE_COMPLETE, save,
root->window);
break;
case CONTENT_SAVE_SOURCE:
gui_drag_save_object(GUI_SAVE_SOURCE, save,
root->window);
break;
}
}
break;
case CONTENT_MSG_SAVELINK:
{
/* Content wants a link to be saved */
struct browser_window *root = browser_window_get_root(bw);
gui_window_save_link(root->window,
event->data.savelink.url,
event->data.savelink.title);
}
break;
case CONTENT_MSG_POINTER:
/* Content wants to have specific mouse pointer */
browser_window_set_pointer(bw, event->data.pointer);
break;
case CONTENT_MSG_PASTE:
/* Content wants a clipboard paste */
gui_paste_from_clipboard(bw->window,
event->data.paste.x, event->data.paste.y);
break;
default:
assert(0);
}
return NSERROR_OK;
}
/*
* Get the dimensions of the area a browser window occupies
*
* \param bw The browser window to get dimensions of
* \param width Updated to the browser window viewport width
* \param height Updated to the browser window viewport height
* \param scaled Whether we want the height with scale applied
*/
void browser_window_get_dimensions(struct browser_window *bw,
int *width, int *height, bool scaled)
{
assert(bw);
if (bw->window == NULL) {
/* Core managed browser window */
*width = bw->width;
*height = bw->height;
} else {
/* Front end window */
gui_window_get_dimensions(bw->window, width, height, scaled);
}
}
/*
* Set the dimensions of the area a browser window occupies
*
* \param bw The browser window to set dimensions of
* \param width Width in pixels
* \param height Height in pixels
*/
void browser_window_set_dimensions(struct browser_window *bw,
int width, int height)
{
assert(bw);
if (bw->window == NULL) {
/* Core managed browser window */
bw->width = width;
bw->height = height;
} else {
LOG(("Asked to set dimensions of front end window."));
assert(0);
}
}
/**
* Transfer the loading_content to a new download window.
*/
void browser_window_convert_to_download(struct browser_window *bw,
llcache_handle *stream)
{
struct browser_window *root = browser_window_get_root(bw);
nserror error;
assert(root != NULL);
error = download_context_create(stream, root->window);
if (error != NSERROR_OK) {
llcache_handle_abort(stream);
llcache_handle_release(stream);
}
/* remove content from browser window */
hlcache_handle_release(bw->loading_content);
bw->loading_content = NULL;
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;
const char *url;
const char *refresh;
assert(bw->current_content != NULL &&
(content_get_status(bw->current_content) ==
CONTENT_STATUS_READY ||
content_get_status(bw->current_content) ==
CONTENT_STATUS_DONE));
/* Ignore if the refresh URL has gone
* (may happen if a fetch error occurred) */
refresh = nsurl_access(content_get_refresh_url(bw->current_content));
if (refresh == NULL)
return;
/* mark this content as invalid so it gets flushed from the cache */
content_invalidate_reuse_data(bw->current_content);
url = nsurl_access(hlcache_handle_get_url(bw->current_content));
if (url != NULL && strcmp(url, refresh) == 0)
history_add = false;
/* Treat an (almost) immediate refresh in a top-level browser window as
* if it were an HTTP redirect, and thus make the resulting fetch
* verifiable.
*
* See fetchcache.c for why redirected fetches should be verifiable at
* all.
*/
if (bw->refresh_interval <= 100 && bw->parent == NULL) {
browser_window_go(bw, refresh, url, history_add);
} else {
browser_window_go_unverifiable(bw, refresh, url, history_add,
bw->current_content);
}
}
/**
* 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)
{
int x, y;
if (bw->current_content == NULL)
return;
switch (bw->browser_window_type) {
case BROWSER_WINDOW_NORMAL:
/* Root browser window, constituting a front end window/tab */
gui_window_set_title(bw->window,
content_get_title(bw->current_content));
browser_window_update_extent(bw);
if (scroll_to_top)
browser_window_set_scroll(bw, 0, 0);
/* if frag_id exists, then try to scroll to it */
/** @todo don't do this if the user has scrolled */
if (bw->frag_id && html_get_id_offset(bw->current_content,
bw->frag_id, &x, &y)) {
browser_window_set_scroll(bw, x, y);
}
gui_window_redraw_window(bw->window);
break;
case BROWSER_WINDOW_IFRAME:
/* Internal iframe browser window */
assert(bw->parent != NULL);
assert(bw->parent->current_content != NULL);
browser_window_update_extent(bw);
if (scroll_to_top)
browser_window_set_scroll(bw, 0, 0);
/* if frag_id exists, then try to scroll to it */
/** @todo don't do this if the user has scrolled */
if (bw->frag_id && html_get_id_offset(bw->current_content,
bw->frag_id, &x, &y)) {
browser_window_set_scroll(bw, x, y);
}
html_redraw_a_box(bw->parent->current_content, bw->box);
break;
case BROWSER_WINDOW_FRAME:
{
struct rect rect;
browser_window_update_extent(bw);
if (scroll_to_top)
browser_window_set_scroll(bw, 0, 0);
/* if frag_id exists, then try to scroll to it */
/** @todo don't do this if the user has scrolled */
if (bw->frag_id && html_get_id_offset(bw->current_content,
bw->frag_id, &x, &y)) {
browser_window_set_scroll(bw, x, y);
}
rect.x0 = scrollbar_get_offset(bw->scroll_x);
rect.y0 = scrollbar_get_offset(bw->scroll_y);
rect.x1 = rect.x0 + bw->width;
rect.y1 = rect.y0 + bw->height;
browser_window_update_box(bw, &rect);
}
break;
default:
case BROWSER_WINDOW_FRAMESET:
/* Nothing to do */
break;
}
}
void browser_window_update_box(struct browser_window *bw, struct rect *rect)
{
int pos_x;
int pos_y;
struct browser_window *top;
assert(bw);
if (bw->window != NULL) {
/* Front end window */
gui_window_update_box(bw->window, rect);
} else {
/* Core managed browser window */
browser_window_get_position(bw, true, &pos_x, &pos_y);
top = browser_window_get_root(bw);
rect->x0 += pos_x / bw->scale;
rect->y0 += pos_y / bw->scale;
rect->x1 += pos_x / bw->scale;
rect->y1 += pos_y / bw->scale;
gui_window_update_box(top->window, rect);
}
}
/**
* 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 != NULL) {
hlcache_handle_abort(bw->loading_content);
hlcache_handle_release(bw->loading_content);
bw->loading_content = NULL;
}
if (bw->current_content != NULL && content_get_status(
bw->current_content) != CONTENT_STATUS_DONE) {
nserror error;
assert(content_get_status(bw->current_content) ==
CONTENT_STATUS_READY);
error = hlcache_handle_abort(bw->current_content);
assert(error == NSERROR_OK);
}
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]);
}
if (bw->current_content != NULL) {
browser_window_refresh_url_bar(bw,
hlcache_handle_get_url(bw->current_content),
bw->frag_id);
}
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)
{
hlcache_handle *c;
unsigned int i;
if (bw->current_content == NULL || bw->loading_content != NULL)
return;
if (all && content_get_type(bw->current_content) == CONTENT_HTML) {
struct html_stylesheet *sheets;
struct content_html_object *object;
unsigned int count;
c = bw->current_content;
/* invalidate objects */
object = html_get_objects(c, &count);
for (; object != NULL; object = object->next) {
if (object->content != NULL)
content_invalidate_reuse_data(object->content);
}
/* invalidate stylesheets */
sheets = html_get_stylesheets(c, &count);
for (i = STYLESHEET_START; i != count; i++) {
if (sheets[i].type == HTML_STYLESHEET_EXTERNAL &&
sheets[i].data.external != NULL) {
content_invalidate_reuse_data(
sheets[i].data.external);
}
}
}
content_invalidate_reuse_data(bw->current_content);
browser_window_go(bw, nsurl_access(
hlcache_handle_get_url(bw->current_content)), 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)
{
int text_len;
/* find topmost window */
while (bw->parent)
bw = bw->parent;
if ((bw->status_text != NULL) &&
(strcmp(text, bw->status_text) == 0)) {
/* status text is unchanged */
bw->status_match++;
return;
}
/* status text is changed */
text_len = strlen(text);
if ((bw->status_text == NULL) || (bw->status_text_len < text_len)) {
/* no current string allocation or it is not long enough */
free(bw->status_text);
bw->status_text = strdup(text);
bw->status_text_len = text_len;
} else {
/* current allocation has enough space */
memcpy(bw->status_text, text, text_len + 1);
}
bw->status_miss++;
gui_window_set_status(bw->window, bw->status_text);
}
/**
* Change the shape of the mouse pointer
*
* \param bw Browser window to set shape in
* \param shape The pointer shape to use
*/
void browser_window_set_pointer(struct browser_window *bw,
browser_pointer_shape shape)
{
struct browser_window *root = browser_window_get_root(bw);
gui_pointer_shape gui_shape;
bool loading;
assert(root);
assert(root->window);
loading = (bw->loading_content != NULL || (bw->current_content &&
content_get_status(bw->current_content) ==
CONTENT_STATUS_READY));
if (wallclock() - bw->last_action < 100 && loading) {
/* If loading and less than 1 second since last link followed,
* force progress indicator pointer */
gui_shape = GUI_POINTER_PROGRESS;
} else if (shape == BROWSER_POINTER_AUTO) {
/* Up to browser window to decide */
if (loading)
gui_shape = GUI_POINTER_PROGRESS;
else
gui_shape = GUI_POINTER_DEFAULT;
} else {
/* Use what we were told */
gui_shape = (gui_pointer_shape)shape;
}
gui_window_set_pointer(root->window, gui_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 != NULL || bw->iframes != NULL)
browser_window_destroy_children(bw);
schedule_remove(browser_window_refresh, bw);
/* If this brower window is not the root window, and has focus, unset
* the root browser window's focus pointer. */
if (!bw->window) {
struct browser_window *top = browser_window_get_root(bw);
if (top->focus == bw)
top->focus = top;
if (bw->current_content != NULL &&
top->cur_sel == content_get_selection(
bw->current_content)) {
browser_window_set_selection(top, NULL);
}
}
/* Destroying a search context causes it to redraw any deselected,
* content areas, so do this first */
browser_window_search_destroy_context(bw);
/* Destruction order is important: we must ensure that the frontend
* destroys any window(s) associated with this browser window before
* we attempt any destructive cleanup.
*/
if (bw->window) {
/* Only the root window has a GUI window */
gui_window_destroy(bw->window);
}
if (bw->loading_content != NULL) {
hlcache_handle_abort(bw->loading_content);
hlcache_handle_release(bw->loading_content);
bw->loading_content = NULL;
}
if (bw->current_content != NULL) {
content_status status = content_get_status(bw->current_content);
if (status == CONTENT_STATUS_READY ||
status == CONTENT_STATUS_DONE)
content_close(bw->current_content);
hlcache_handle_release(bw->current_content);
bw->current_content = NULL;
}
if (bw->loading_favicon != NULL) {
hlcache_handle_abort(bw->loading_favicon);
hlcache_handle_release(bw->loading_favicon);
bw->loading_favicon = NULL;
}
if (bw->current_favicon != NULL) {
content_status status = content_get_status(bw->current_favicon);
if (status == CONTENT_STATUS_READY ||
status == CONTENT_STATUS_DONE)
content_close(bw->current_favicon);
hlcache_handle_release(bw->current_favicon);
bw->current_favicon = NULL;
}
if (bw->box != NULL) {
bw->box->iframe = NULL;
bw->box = NULL;
}
if (bw->jsctx != NULL) {
js_destroycontext(bw->jsctx);
}
/* These simply free memory, so are safe here */
if (bw->frag_id != NULL)
lwc_string_unref(bw->frag_id);
history_destroy(bw->history);
free(bw->name);
free(bw->status_text);
bw->status_text = NULL;
LOG(("Status text cache match:miss %d:%d",
bw->status_match, bw->status_miss));
}
/**
* 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, bool background,
int width, int height)
{
hlcache_handle *c = bw->current_content;
if (c == NULL)
return;
if (bw->browser_window_type != BROWSER_WINDOW_IFRAME) {
/* Iframe dimensions are already scaled in parent's layout */
width /= bw->scale;
height /= bw->scale;
}
if (bw->window == NULL) {
/* Core managed browser window; subtract scrollbar width */
width -= bw->scroll_y ? SCROLLBAR_WIDTH : 0;
height -= bw->scroll_x ? SCROLLBAR_WIDTH : 0;
width = width > 0 ? width : 0;
height = height > 0 ? height : 0;
}
content_reformat(c, background, width, height);
}
/**
* 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;
hlcache_handle *c;
if (fabs(bw->scale-scale) < 0.0001)
return;
bw->scale = scale;
c = bw->current_content;
if (c != NULL) {
if (content_can_reformat(c) == false) {
browser_window_update(bw, false);
} else {
bw->reformat_pending = true;
browser_reformat_pending = true;
}
}
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);
}
/**
* Gets the scale of a browser window
*
* \param bw The browser window to scale
* \return
*/
float browser_window_get_scale(struct browser_window *bw)
{
return bw->scale;
}
/**
* Update URL bar for a given browser window to given URL
*
* \param bw Browser window to update URL bar for.
* \param url URL for content displayed by bw, excluding any fragment.
* \param frag Additional fragment. May be NULL if none.
*/
void browser_window_refresh_url_bar(struct browser_window *bw, nsurl *url,
lwc_string *frag)
{
assert(bw);
assert(url);
if (bw->parent != NULL) {
/* Not root window; don't set a URL in GUI URL bar */
return;
}
if (frag == NULL) {
/* With no fragment, we may as well pass url straight through
* saving a malloc, copy, free cycle.
*/
gui_window_set_url(bw->window, nsurl_access(url));
} else {
nsurl *display_url;
nserror error;
error = nsurl_refragment(url, frag, &display_url);
if (error != NSERROR_OK) {
warn_user("NoMemory", 0);
return;
}
gui_window_set_url(bw->window, nsurl_access(display_url));
nsurl_unref(display_url);
}
}
/**
* 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 mouse The current mouse state
* \return The browser window the mouse is in
*/
struct browser_window *browser_window_find_target(struct browser_window *bw,
const char *target, browser_mouse_state mouse)
{
struct browser_window *bw_target;
struct browser_window *top;
hlcache_handle *c;
int rdepth;
/* use the base target if we don't have one */
c = bw->current_content;
if (target == NULL && c != NULL && content_get_type(c) == CONTENT_HTML)
target = html_get_base_target(c);
if (target == NULL)
target = TARGET_SELF;
/* allow the simple case of target="_blank" to be ignored if requested
*/
if ((!(mouse & BROWSER_MOUSE_CLICK_2)) &&
(!((mouse & BROWSER_MOUSE_CLICK_2) &&
(mouse & BROWSER_MOUSE_MOD_2))) &&
(!nsoption_bool(target_blank))) {
/* not a mouse button 2 click
* not a mouse button 1 click with ctrl pressed
* configured to ignore target="_blank" */
if ((target == TARGET_BLANK) || (!strcasecmp(target, "_blank")))
return bw;
}
/* handle reserved keywords */
if (((nsoption_bool(button_2_tab)) &&
(mouse & BROWSER_MOUSE_CLICK_2))||
((!nsoption_bool(button_2_tab)) &&
((mouse & BROWSER_MOUSE_CLICK_1) &&
(mouse & BROWSER_MOUSE_MOD_2))) ||
((nsoption_bool(button_2_tab)) &&
((target == TARGET_BLANK) ||
(!strcasecmp(target, "_blank"))))) {
/* open in new tab if:
* - button_2 opens in new tab and button_2 was pressed
* OR
* - button_2 doesn't open in new tabs and button_1 was
* pressed with ctrl held
* OR
* - button_2 opens in new tab and the link target is "_blank"
*/
bw_target = browser_window_create(NULL, bw, NULL, false, true);
if (!bw_target)
return bw;
return bw_target;
} else if (((!nsoption_bool(button_2_tab)) &&
(mouse & BROWSER_MOUSE_CLICK_2)) ||
((nsoption_bool(button_2_tab)) &&
((mouse & BROWSER_MOUSE_CLICK_1) &&
(mouse & BROWSER_MOUSE_MOD_2))) ||
((!nsoption_bool(button_2_tab)) &&
((target == TARGET_BLANK) ||
(!strcasecmp(target, "_blank"))))) {
/* open in new window if:
* - button_2 doesn't open in new tabs and button_2 was pressed
* OR
* - button_2 opens in new tab and button_1 was pressed with
* ctrl held
* OR
* - button_2 doesn't open in new tabs and the link target is
* "_blank"
*/
bw_target = browser_window_create(NULL, bw, NULL, false, 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 (!nsoption_bool(target_blank))
return bw;
bw_target = browser_window_create(NULL, bw, NULL, false, 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++;
if (bw->children != NULL) {
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);
}
}
if (bw->iframes != NULL) {
for (i = 0; i < bw->iframe_count; i++)
browser_window_find_target_internal(&bw->iframes[i],
target, depth, page, rdepth, bw_target);
}
}
/**
* Handle non-click mouse action in a browser window. (drag ends, movements)
*
* \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)
{
hlcache_handle *c = bw->current_content;
const char *status = NULL;
browser_pointer_shape pointer = BROWSER_POINTER_DEFAULT;
if (bw->window != NULL && bw->drag_window && bw != bw->drag_window) {
/* This is the root browser window and there's an active drag
* in a sub window.
* Pass the mouse action straight on to that bw. */
struct browser_window *drag_bw = bw->drag_window;
int off_x = 0;
int off_y = 0;
browser_window_get_position(drag_bw, true, &off_x, &off_y);
if (drag_bw->browser_window_type == BROWSER_WINDOW_FRAME) {
browser_window_mouse_track(drag_bw, mouse,
x - off_x, y - off_y);
} else if (drag_bw->browser_window_type ==
BROWSER_WINDOW_IFRAME) {
browser_window_mouse_track(drag_bw, mouse,
x - off_x / bw->scale,
y - off_y / bw->scale);
}
return;
}
if (bw->children) {
/* Browser window has children (frames) */
struct browser_window *child;
int cur_child;
int children = bw->rows * bw->cols;
for (cur_child = 0; cur_child < children; cur_child++) {
child = &bw->children[cur_child];
if (x < child->x || y < child->y ||
child->x + child->width < x ||
child->y + child->height < y) {
/* Click not in this child */
continue;
}
/* It's this child that contains the mouse; pass
* mouse action on to child */
browser_window_mouse_track(child, mouse,
x - child->x + scrollbar_get_offset(
child->scroll_x),
y - child->y + scrollbar_get_offset(
child->scroll_y));
/* Mouse action was for this child, we're done */
return;
}
/* Odd if we reached here, but nothing else can use the click
* when there are children. */
return;
}
if (c == NULL && bw->drag_type != DRAGGING_FRAME)
return;
if (bw->drag_type != DRAGGING_NONE && !mouse) {
browser_window_mouse_drag_end(bw, mouse, x, y);
}
/* Browser window's horizontal scrollbar */
if (bw->scroll_x != NULL && bw->drag_type != DRAGGING_SCR_Y) {
int scr_x, scr_y;
browser_window_get_scrollbar_pos(bw, true, &scr_x, &scr_y);
scr_x = x - scr_x - scrollbar_get_offset(bw->scroll_x);
scr_y = y - scr_y - scrollbar_get_offset(bw->scroll_y);
if ((scr_x > 0 && scr_x < browser_window_get_scrollbar_len(bw,
true) &&
scr_y > 0 && scr_y < SCROLLBAR_WIDTH &&
bw->drag_type == DRAGGING_NONE) ||
bw->drag_type == DRAGGING_SCR_X) {
/* Start a scrollbar drag, or continue existing drag */
status = scrollbar_mouse_action(bw->scroll_x, mouse,
scr_x, scr_y);
pointer = BROWSER_POINTER_DEFAULT;
if (status != NULL)
browser_window_set_status(bw, status);
browser_window_set_pointer(bw, pointer);
return;
}
}
/* Browser window's vertical scrollbar */
if (bw->scroll_y != NULL) {
int scr_x, scr_y;
browser_window_get_scrollbar_pos(bw, false, &scr_x, &scr_y);
scr_x = x - scr_x - scrollbar_get_offset(bw->scroll_x);
scr_y = y - scr_y - scrollbar_get_offset(bw->scroll_y);
if ((scr_y > 0 && scr_y < browser_window_get_scrollbar_len(bw,
false) &&
scr_x > 0 && scr_x < SCROLLBAR_WIDTH &&
bw->drag_type == DRAGGING_NONE) ||
bw->drag_type == DRAGGING_SCR_Y) {
/* Start a scrollbar drag, or continue existing drag */
status = scrollbar_mouse_action(bw->scroll_y, mouse,
scr_x, scr_y);
pointer = BROWSER_POINTER_DEFAULT;
if (status != NULL)
browser_window_set_status(bw, status);
browser_window_set_pointer(bw, pointer);
return;
}
}
if (bw->drag_type == DRAGGING_FRAME) {
browser_window_resize_frame(bw, bw->x + x, bw->y + 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;
browser_window_set_scroll(bw, scrollx, scrolly);
} else {
assert(c != NULL);
content_mouse_track(c, bw, mouse, x, y);
}
}
/**
* 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)
{
hlcache_handle *c = bw->current_content;
const char *status = NULL;
browser_pointer_shape pointer = BROWSER_POINTER_DEFAULT;
if (bw->children) {
/* Browser window has children (frames) */
struct browser_window *child;
int cur_child;
int children = bw->rows * bw->cols;
for (cur_child = 0; cur_child < children; cur_child++) {
child = &bw->children[cur_child];
if (x < child->x || y < child->y ||
child->x + child->width < x ||
child->y + child->height < y) {
/* Click not in this child */
continue;
}
/* It's this child that contains the click; pass it
* on to child. */
browser_window_mouse_click(child, mouse,
x - child->x + scrollbar_get_offset(
child->scroll_x),
y - child->y + scrollbar_get_offset(
child->scroll_y));
/* Mouse action was for this child, we're done */
return;
}
return;
}
if (!c)
return;
if (bw->scroll_x != NULL) {
int scr_x, scr_y;
browser_window_get_scrollbar_pos(bw, true, &scr_x, &scr_y);
scr_x = x - scr_x - scrollbar_get_offset(bw->scroll_x);
scr_y = y - scr_y - scrollbar_get_offset(bw->scroll_y);
if (scr_x > 0 && scr_x < browser_window_get_scrollbar_len(bw,
true) &&
scr_y > 0 && scr_y < SCROLLBAR_WIDTH) {
status = scrollbar_mouse_action(bw->scroll_x, mouse,
scr_x, scr_y);
pointer = BROWSER_POINTER_DEFAULT;
if (status != NULL)
browser_window_set_status(bw, status);
browser_window_set_pointer(bw, pointer);
return;
}
}
if (bw->scroll_y != NULL) {
int scr_x, scr_y;
browser_window_get_scrollbar_pos(bw, false, &scr_x, &scr_y);
scr_x = x - scr_x - scrollbar_get_offset(bw->scroll_x);
scr_y = y - scr_y - scrollbar_get_offset(bw->scroll_y);
if (scr_y > 0 && scr_y < browser_window_get_scrollbar_len(bw,
false) &&
scr_x > 0 && scr_x < SCROLLBAR_WIDTH) {
status = scrollbar_mouse_action(bw->scroll_y, mouse,
scr_x, scr_y);
pointer = BROWSER_POINTER_DEFAULT;
if (status != NULL)
browser_window_set_status(bw, status);
browser_window_set_pointer(bw, pointer);
return;
}
}
switch (content_get_type(c)) {
case CONTENT_HTML:
case CONTENT_TEXTPLAIN:
content_mouse_action(c, 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, BROWSER_POINTER_MOVE);
}
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
*
* TODO: Remove this function, once these things are associated with content,
* rather than bw.
*/
void browser_window_mouse_drag_end(struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
int scr_x, scr_y;
switch (bw->drag_type) {
case DRAGGING_SELECTION:
case DRAGGING_OTHER:
case DRAGGING_CONTENT_SCROLLBAR:
/* Drag handled by content handler */
break;
case DRAGGING_SCR_X:
browser_window_get_scrollbar_pos(bw, true, &scr_x, &scr_y);
scr_x = x - scr_x - scrollbar_get_offset(bw->scroll_x);
scr_y = y - scr_y - scrollbar_get_offset(bw->scroll_y);
scrollbar_mouse_drag_end(bw->scroll_x, mouse, scr_x, scr_y);
bw->drag_type = DRAGGING_NONE;
break;
case DRAGGING_SCR_Y:
browser_window_get_scrollbar_pos(bw, false, &scr_x, &scr_y);
scr_x = x - scr_x - scrollbar_get_offset(bw->scroll_x);
scr_y = y - scr_y - scrollbar_get_offset(bw->scroll_y);
scrollbar_mouse_drag_end(bw->scroll_y, mouse, scr_x, scr_y);
bw->drag_type = DRAGGING_NONE;
break;
default:
browser_window_set_drag_type(bw, DRAGGING_NONE, NULL);
break;
}
}
/**
* 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)
{
content_request_redraw(bw->current_content, x, y, width, height);
}
/**
* 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)
{
browser_window_set_drag_type(bw, DRAGGING_PAGE_SCROLL, NULL);
bw->drag_start_x = x;
bw->drag_start_y = y;
if (bw->window != NULL) {
/* Front end window */
gui_window_get_scroll(bw->window, &bw->drag_start_scroll_x,
&bw->drag_start_scroll_y);
gui_window_scroll_start(bw->window);
} else {
/* Core managed browser window */
bw->drag_start_scroll_x = scrollbar_get_offset(bw->scroll_x);
bw->drag_start_scroll_y = scrollbar_get_offset(bw->scroll_y);
}
}
/**
* Check availability of Back action for a given browser window
*
* \param bw browser window
* \return true if Back action is available
*/
bool browser_window_back_available(struct browser_window *bw)
{
return (bw && bw->history && history_back_available(bw->history));
}
/**
* Check availability of Forward action for a given browser window
*
* \param bw browser window
* \return true if Forward action is available
*/
bool browser_window_forward_available(struct browser_window *bw)
{
return (bw && bw->history && history_forward_available(bw->history));
}
/**
* Check availability of Reload action for a given browser window
*
* \param bw browser window
* \return true if Reload action is available
*/
bool browser_window_reload_available(struct browser_window *bw)
{
return (bw && bw->current_content && !bw->loading_content);
}
/**
* Check availability of Stop action for a given browser window
*
* \param bw browser window
* \return true if Stop action is available
*/
bool browser_window_stop_available(struct browser_window *bw)
{
return (bw && (bw->loading_content ||
(bw->current_content &&
(content_get_status(bw->current_content) !=
CONTENT_STATUS_DONE))));
}
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