mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-17 01:33:16 +03:00
716 lines
17 KiB
C
716 lines
17 KiB
C
/*
|
|
* Copyright 2013 Vincent Sanders <vince@netsurf-browser.org>
|
|
*
|
|
* This file is part of NetSurf, http://www.netsurf-browser.org/
|
|
*
|
|
* NetSurf is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* NetSurf is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/** \file
|
|
* Processing for html content object operations.
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <ctype.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "content/hlcache.h"
|
|
#include "css/utils.h"
|
|
#include "utils/nsoption.h"
|
|
#include "desktop/scrollbar.h"
|
|
#include "desktop/gui_factory.h"
|
|
#include "utils/corestrings.h"
|
|
#include "utils/config.h"
|
|
#include "utils/log.h"
|
|
|
|
#include "render/box.h"
|
|
#include "render/html_internal.h"
|
|
|
|
/* break reference loop */
|
|
static void html_object_refresh(void *p);
|
|
|
|
/**
|
|
* Retrieve objects used by HTML document
|
|
*
|
|
* \param h Content to retrieve objects from
|
|
* \param n Pointer to location to receive number of objects
|
|
* \return Pointer to list of objects
|
|
*/
|
|
struct content_html_object *html_get_objects(hlcache_handle *h, unsigned int *n)
|
|
{
|
|
html_content *c = (html_content *) hlcache_handle_get_content(h);
|
|
|
|
assert(c != NULL);
|
|
assert(n != NULL);
|
|
|
|
*n = c->num_objects;
|
|
|
|
return c->object_list;
|
|
}
|
|
|
|
/**
|
|
* Handle object fetching or loading failure.
|
|
*
|
|
* \param box box containing object which failed to load
|
|
* \param content document of type CONTENT_HTML
|
|
* \param background the object was the background image for the box
|
|
*/
|
|
|
|
static void
|
|
html_object_failed(struct box *box, html_content *content, bool background)
|
|
{
|
|
/* Nothing to do */
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Update a box whose content has completed rendering.
|
|
*/
|
|
|
|
static void
|
|
html_object_done(struct box *box,
|
|
hlcache_handle *object,
|
|
bool background)
|
|
{
|
|
struct box *b;
|
|
|
|
if (background) {
|
|
box->background = object;
|
|
return;
|
|
}
|
|
|
|
box->object = object;
|
|
|
|
if (!(box->flags & REPLACE_DIM)) {
|
|
/* invalidate parent min, max widths */
|
|
for (b = box; b; b = b->parent)
|
|
b->max_width = UNKNOWN_MAX_WIDTH;
|
|
|
|
/* delete any clones of this box */
|
|
while (box->next && (box->next->flags & CLONE)) {
|
|
/* box_free_box(box->next); */
|
|
box->next = box->next->next;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Callback for hlcache_handle_retrieve() for objects.
|
|
*/
|
|
|
|
static nserror
|
|
html_object_callback(hlcache_handle *object,
|
|
const hlcache_event *event,
|
|
void *pw)
|
|
{
|
|
struct content_html_object *o = pw;
|
|
html_content *c = (html_content *) o->parent;
|
|
int x, y;
|
|
struct box *box;
|
|
|
|
assert(c->base.status != CONTENT_STATUS_ERROR);
|
|
|
|
box = o->box;
|
|
if (box == NULL && event->type != CONTENT_MSG_ERROR) {
|
|
return NSERROR_OK;
|
|
}
|
|
|
|
switch (event->type) {
|
|
case CONTENT_MSG_LOADING:
|
|
if (c->base.status != CONTENT_STATUS_LOADING && c->bw != NULL)
|
|
content_open(object,
|
|
c->bw, &c->base,
|
|
box->object_params);
|
|
break;
|
|
|
|
case CONTENT_MSG_READY:
|
|
if (content_can_reformat(object)) {
|
|
/* TODO: avoid knowledge of box internals here */
|
|
content_reformat(object, false,
|
|
box->max_width != UNKNOWN_MAX_WIDTH ?
|
|
box->width : 0,
|
|
box->max_width != UNKNOWN_MAX_WIDTH ?
|
|
box->height : 0);
|
|
|
|
/* Adjust parent content for new object size */
|
|
html_object_done(box, object, o->background);
|
|
if (c->base.status == CONTENT_STATUS_READY ||
|
|
c->base.status == CONTENT_STATUS_DONE)
|
|
content__reformat(&c->base, false,
|
|
c->base.available_width,
|
|
c->base.height);
|
|
}
|
|
break;
|
|
|
|
case CONTENT_MSG_DONE:
|
|
c->base.active--;
|
|
LOG(("%d fetches active", c->base.active));
|
|
|
|
html_object_done(box, object, o->background);
|
|
|
|
if (c->base.status != CONTENT_STATUS_LOADING &&
|
|
box->flags & REPLACE_DIM) {
|
|
union content_msg_data data;
|
|
|
|
if (!box_visible(box))
|
|
break;
|
|
|
|
box_coords(box, &x, &y);
|
|
|
|
data.redraw.x = x + box->padding[LEFT];
|
|
data.redraw.y = y + box->padding[TOP];
|
|
data.redraw.width = box->width;
|
|
data.redraw.height = box->height;
|
|
data.redraw.full_redraw = true;
|
|
|
|
content_broadcast(&c->base, CONTENT_MSG_REDRAW, data);
|
|
}
|
|
break;
|
|
|
|
case CONTENT_MSG_ERROR:
|
|
hlcache_handle_release(object);
|
|
|
|
o->content = NULL;
|
|
|
|
if (box != NULL) {
|
|
c->base.active--;
|
|
LOG(("%d fetches active", c->base.active));
|
|
|
|
content_add_error(&c->base, "?", 0);
|
|
html_object_failed(box, c, o->background);
|
|
}
|
|
break;
|
|
|
|
case CONTENT_MSG_STATUS:
|
|
if (event->data.explicit_status_text == NULL) {
|
|
/* Object content's status text updated */
|
|
union content_msg_data data;
|
|
data.explicit_status_text =
|
|
content_get_status_message(object);
|
|
html_set_status(c, data.explicit_status_text);
|
|
content_broadcast(&c->base, CONTENT_MSG_STATUS, data);
|
|
} else {
|
|
/* Object content wants to set explicit message */
|
|
content_broadcast(&c->base, CONTENT_MSG_STATUS,
|
|
event->data);
|
|
}
|
|
break;
|
|
|
|
case CONTENT_MSG_REDRAW:
|
|
if (c->base.status != CONTENT_STATUS_LOADING) {
|
|
union content_msg_data data = event->data;
|
|
|
|
if (!box_visible(box))
|
|
break;
|
|
|
|
box_coords(box, &x, &y);
|
|
|
|
if (object == box->background) {
|
|
/* Redraw request is for background */
|
|
css_fixed hpos = 0, vpos = 0;
|
|
css_unit hunit = CSS_UNIT_PX;
|
|
css_unit vunit = CSS_UNIT_PX;
|
|
int width = box->padding[LEFT] + box->width +
|
|
box->padding[RIGHT];
|
|
int height = box->padding[TOP] + box->height +
|
|
box->padding[BOTTOM];
|
|
int t, h, l, w;
|
|
|
|
/* Need to know background-position */
|
|
css_computed_background_position(box->style,
|
|
&hpos, &hunit, &vpos, &vunit);
|
|
|
|
w = content_get_width(box->background);
|
|
if (hunit == CSS_UNIT_PCT) {
|
|
l = (width - w) * hpos / INTTOFIX(100);
|
|
} else {
|
|
l = FIXTOINT(nscss_len2px(hpos, hunit,
|
|
box->style));
|
|
}
|
|
|
|
h = content_get_height(box->background);
|
|
if (vunit == CSS_UNIT_PCT) {
|
|
t = (height - h) * vpos / INTTOFIX(100);
|
|
} else {
|
|
t = FIXTOINT(nscss_len2px(vpos, vunit,
|
|
box->style));
|
|
}
|
|
|
|
/* Redraw area depends on background-repeat */
|
|
switch (css_computed_background_repeat(
|
|
box->style)) {
|
|
case CSS_BACKGROUND_REPEAT_REPEAT:
|
|
data.redraw.x = 0;
|
|
data.redraw.y = 0;
|
|
data.redraw.width = box->width;
|
|
data.redraw.height = box->height;
|
|
break;
|
|
|
|
case CSS_BACKGROUND_REPEAT_REPEAT_X:
|
|
data.redraw.x = 0;
|
|
data.redraw.y += t;
|
|
data.redraw.width = box->width;
|
|
break;
|
|
|
|
case CSS_BACKGROUND_REPEAT_REPEAT_Y:
|
|
data.redraw.x += l;
|
|
data.redraw.y = 0;
|
|
data.redraw.height = box->height;
|
|
break;
|
|
|
|
case CSS_BACKGROUND_REPEAT_NO_REPEAT:
|
|
data.redraw.x += l;
|
|
data.redraw.y += t;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
data.redraw.object_width = box->width;
|
|
data.redraw.object_height = box->height;
|
|
|
|
/* Add offset to box */
|
|
data.redraw.x += x;
|
|
data.redraw.y += y;
|
|
data.redraw.object_x += x;
|
|
data.redraw.object_y += y;
|
|
|
|
content_broadcast(&c->base,
|
|
CONTENT_MSG_REDRAW, data);
|
|
break;
|
|
|
|
} else {
|
|
/* Non-background case */
|
|
if (hlcache_handle_get_content(object) ==
|
|
event->data.redraw.object) {
|
|
|
|
int w = content_get_width(object);
|
|
int h = content_get_height(object);
|
|
|
|
if (w != 0) {
|
|
data.redraw.x =
|
|
data.redraw.x *
|
|
box->width / w;
|
|
data.redraw.width =
|
|
data.redraw.width *
|
|
box->width / w;
|
|
}
|
|
|
|
if (h != 0) {
|
|
data.redraw.y =
|
|
data.redraw.y *
|
|
box->height / h;
|
|
data.redraw.height =
|
|
data.redraw.height *
|
|
box->height / h;
|
|
}
|
|
|
|
data.redraw.object_width = box->width;
|
|
data.redraw.object_height = box->height;
|
|
}
|
|
|
|
data.redraw.x += x + box->padding[LEFT];
|
|
data.redraw.y += y + box->padding[TOP];
|
|
data.redraw.object_x += x + box->padding[LEFT];
|
|
data.redraw.object_y += y + box->padding[TOP];
|
|
}
|
|
|
|
content_broadcast(&c->base, CONTENT_MSG_REDRAW, data);
|
|
}
|
|
break;
|
|
|
|
case CONTENT_MSG_REFRESH:
|
|
if (content_get_type(object) == CONTENT_HTML) {
|
|
/* only for HTML objects */
|
|
guit->browser->schedule(event->data.delay * 1000,
|
|
html_object_refresh, o);
|
|
}
|
|
|
|
break;
|
|
|
|
case CONTENT_MSG_LINK:
|
|
/* Don't care about favicons that aren't on top level content */
|
|
break;
|
|
|
|
case CONTENT_MSG_GETCTX:
|
|
*(event->data.jscontext) = NULL;
|
|
break;
|
|
|
|
case CONTENT_MSG_SCROLL:
|
|
if (box->scroll_x != NULL)
|
|
scrollbar_set(box->scroll_x, event->data.scroll.x0,
|
|
false);
|
|
if (box->scroll_y != NULL)
|
|
scrollbar_set(box->scroll_y, event->data.scroll.y0,
|
|
false);
|
|
break;
|
|
|
|
case CONTENT_MSG_DRAGSAVE:
|
|
{
|
|
union content_msg_data msg_data;
|
|
if (event->data.dragsave.content == NULL)
|
|
msg_data.dragsave.content = object;
|
|
else
|
|
msg_data.dragsave.content =
|
|
event->data.dragsave.content;
|
|
|
|
content_broadcast(&c->base, CONTENT_MSG_DRAGSAVE, msg_data);
|
|
}
|
|
break;
|
|
|
|
case CONTENT_MSG_SAVELINK:
|
|
case CONTENT_MSG_POINTER:
|
|
case CONTENT_MSG_GADGETCLICK:
|
|
/* These messages are for browser window layer.
|
|
* we're not interested, so pass them on. */
|
|
content_broadcast(&c->base, event->type, event->data);
|
|
break;
|
|
|
|
case CONTENT_MSG_CARET:
|
|
{
|
|
union html_focus_owner focus_owner;
|
|
focus_owner.content = box;
|
|
|
|
switch (event->data.caret.type) {
|
|
case CONTENT_CARET_REMOVE:
|
|
case CONTENT_CARET_HIDE:
|
|
html_set_focus(c, HTML_FOCUS_CONTENT, focus_owner,
|
|
true, 0, 0, 0, NULL);
|
|
break;
|
|
case CONTENT_CARET_SET_POS:
|
|
html_set_focus(c, HTML_FOCUS_CONTENT, focus_owner,
|
|
false, event->data.caret.pos.x,
|
|
event->data.caret.pos.y,
|
|
event->data.caret.pos.height,
|
|
event->data.caret.pos.clip);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case CONTENT_MSG_DRAG:
|
|
{
|
|
html_drag_type drag_type = HTML_DRAG_NONE;
|
|
union html_drag_owner drag_owner;
|
|
drag_owner.content = box;
|
|
|
|
switch (event->data.drag.type) {
|
|
case CONTENT_DRAG_NONE:
|
|
drag_type = HTML_DRAG_NONE;
|
|
drag_owner.no_owner = true;
|
|
break;
|
|
case CONTENT_DRAG_SCROLL:
|
|
drag_type = HTML_DRAG_CONTENT_SCROLL;
|
|
break;
|
|
case CONTENT_DRAG_SELECTION:
|
|
drag_type = HTML_DRAG_CONTENT_SELECTION;
|
|
break;
|
|
}
|
|
html_set_drag_type(c, drag_type, drag_owner,
|
|
event->data.drag.rect);
|
|
}
|
|
break;
|
|
|
|
case CONTENT_MSG_SELECTION:
|
|
{
|
|
html_selection_type sel_type;
|
|
union html_selection_owner sel_owner;
|
|
|
|
if (event->data.selection.selection) {
|
|
sel_type = HTML_SELECTION_CONTENT;
|
|
sel_owner.content = box;
|
|
} else {
|
|
sel_type = HTML_SELECTION_NONE;
|
|
sel_owner.none = true;
|
|
}
|
|
html_set_selection(c, sel_type, sel_owner,
|
|
event->data.selection.read_only);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (c->base.status == CONTENT_STATUS_READY && c->base.active == 0 &&
|
|
(event->type == CONTENT_MSG_LOADING ||
|
|
event->type == CONTENT_MSG_DONE ||
|
|
event->type == CONTENT_MSG_ERROR)) {
|
|
/* all objects have arrived */
|
|
content__reformat(&c->base, false, c->base.available_width,
|
|
c->base.height);
|
|
html_set_status(c, "");
|
|
content_set_done(&c->base);
|
|
}
|
|
|
|
/* If 1) the configuration option to reflow pages while objects are
|
|
* fetched is set
|
|
* 2) an object is newly fetched & converted,
|
|
* 3) the box's dimensions need to change due to being replaced
|
|
* 4) the object's parent HTML is ready for reformat,
|
|
* 5) the time since the previous reformat is more than the
|
|
* configured minimum time between reformats
|
|
* then reformat the page to display newly fetched objects */
|
|
else if (nsoption_bool(incremental_reflow) &&
|
|
event->type == CONTENT_MSG_DONE &&
|
|
box != NULL && !(box->flags & REPLACE_DIM) &&
|
|
(c->base.status == CONTENT_STATUS_READY ||
|
|
c->base.status == CONTENT_STATUS_DONE) &&
|
|
(wallclock() > c->base.reformat_time)) {
|
|
content__reformat(&c->base, false, c->base.available_width,
|
|
c->base.height);
|
|
}
|
|
|
|
return NSERROR_OK;
|
|
}
|
|
|
|
/**
|
|
* Start a fetch for an object required by a page, replacing an existing object.
|
|
*
|
|
* \param object Object to replace
|
|
* \param url URL of object to fetch (copied)
|
|
* \return true on success, false on memory exhaustion
|
|
*/
|
|
|
|
static bool html_replace_object(struct content_html_object *object, nsurl *url)
|
|
{
|
|
html_content *c;
|
|
hlcache_child_context child;
|
|
html_content *page;
|
|
nserror error;
|
|
|
|
assert(object != NULL);
|
|
assert(object->box != NULL);
|
|
|
|
c = (html_content *) object->parent;
|
|
|
|
child.charset = c->encoding;
|
|
child.quirks = c->base.quirks;
|
|
|
|
if (object->content != NULL) {
|
|
/* remove existing object */
|
|
if (content_get_status(object->content) != CONTENT_STATUS_DONE) {
|
|
c->base.active--;
|
|
LOG(("%d fetches active", c->base.active));
|
|
}
|
|
|
|
hlcache_handle_release(object->content);
|
|
object->content = NULL;
|
|
|
|
object->box->object = NULL;
|
|
}
|
|
|
|
/* initialise fetch */
|
|
error = hlcache_handle_retrieve(url, HLCACHE_RETRIEVE_SNIFF_TYPE,
|
|
content_get_url(&c->base), NULL,
|
|
html_object_callback, object, &child,
|
|
object->permitted_types,
|
|
&object->content);
|
|
|
|
if (error != NSERROR_OK)
|
|
return false;
|
|
|
|
for (page = c; page != NULL; page = page->page) {
|
|
page->base.active++;
|
|
LOG(("%d fetches active", c->base.active));
|
|
|
|
page->base.status = CONTENT_STATUS_READY;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* schedule callback for object refresh
|
|
*/
|
|
|
|
static void html_object_refresh(void *p)
|
|
{
|
|
struct content_html_object *object = p;
|
|
nsurl *refresh_url;
|
|
|
|
assert(content_get_type(object->content) == CONTENT_HTML);
|
|
|
|
refresh_url = content_get_refresh_url(object->content);
|
|
|
|
/* Ignore if refresh URL has gone
|
|
* (may happen if fetch errored) */
|
|
if (refresh_url == NULL)
|
|
return;
|
|
|
|
content_invalidate_reuse_data(object->content);
|
|
|
|
if (!html_replace_object(object, refresh_url)) {
|
|
/** \todo handle memory exhaustion */
|
|
}
|
|
}
|
|
|
|
nserror html_object_open_objects(html_content *html, struct browser_window *bw)
|
|
{
|
|
struct content_html_object *object, *next;
|
|
|
|
for (object = html->object_list; object != NULL; object = next) {
|
|
next = object->next;
|
|
|
|
if (object->content == NULL || object->box == NULL)
|
|
continue;
|
|
|
|
if (content_get_type(object->content) == CONTENT_NONE)
|
|
continue;
|
|
|
|
content_open(object->content,
|
|
bw,
|
|
&html->base,
|
|
object->box->object_params);
|
|
}
|
|
return NSERROR_OK;
|
|
}
|
|
|
|
nserror html_object_abort_objects(html_content *htmlc)
|
|
{
|
|
struct content_html_object *object;
|
|
|
|
for (object = htmlc->object_list;
|
|
object != NULL;
|
|
object = object->next) {
|
|
if (object->content == NULL)
|
|
continue;
|
|
|
|
switch (content_get_status(object->content)) {
|
|
case CONTENT_STATUS_DONE:
|
|
/* already loaded: do nothing */
|
|
break;
|
|
|
|
case CONTENT_STATUS_READY:
|
|
hlcache_handle_abort(object->content);
|
|
/* Active count will be updated when
|
|
* html_object_callback receives
|
|
* CONTENT_MSG_DONE from this object
|
|
*/
|
|
break;
|
|
|
|
default:
|
|
hlcache_handle_abort(object->content);
|
|
hlcache_handle_release(object->content);
|
|
object->content = NULL;
|
|
|
|
htmlc->base.active--;
|
|
LOG(("%d fetches active", htmlc->base.active));
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
return NSERROR_OK;
|
|
}
|
|
|
|
nserror html_object_close_objects(html_content *html)
|
|
{
|
|
struct content_html_object *object, *next;
|
|
|
|
for (object = html->object_list; object != NULL; object = next) {
|
|
next = object->next;
|
|
|
|
if (object->content == NULL || object->box == NULL)
|
|
continue;
|
|
|
|
if (content_get_type(object->content) == CONTENT_NONE)
|
|
continue;
|
|
|
|
if (content_get_type(object->content) == CONTENT_HTML) {
|
|
guit->browser->schedule(-1, html_object_refresh, object);
|
|
}
|
|
|
|
content_close(object->content);
|
|
}
|
|
return NSERROR_OK;
|
|
}
|
|
|
|
nserror html_object_free_objects(html_content *html)
|
|
{
|
|
while (html->object_list != NULL) {
|
|
struct content_html_object *victim = html->object_list;
|
|
|
|
if (victim->content != NULL) {
|
|
LOG(("object %p", victim->content));
|
|
|
|
if (content_get_type(victim->content) == CONTENT_HTML) {
|
|
guit->browser->schedule(-1, html_object_refresh, victim);
|
|
}
|
|
hlcache_handle_release(victim->content);
|
|
}
|
|
|
|
html->object_list = victim->next;
|
|
free(victim);
|
|
}
|
|
return NSERROR_OK;
|
|
}
|
|
|
|
|
|
|
|
/* exported interface documented in render/html_internal.h */
|
|
bool html_fetch_object(html_content *c, nsurl *url, struct box *box,
|
|
content_type permitted_types,
|
|
int available_width, int available_height,
|
|
bool background)
|
|
{
|
|
struct content_html_object *object;
|
|
hlcache_child_context child;
|
|
nserror error;
|
|
|
|
/* If we've already been aborted, don't bother attempting the fetch */
|
|
if (c->aborted)
|
|
return true;
|
|
|
|
child.charset = c->encoding;
|
|
child.quirks = c->base.quirks;
|
|
|
|
object = calloc(1, sizeof(struct content_html_object));
|
|
if (object == NULL) {
|
|
return false;
|
|
}
|
|
|
|
object->parent = (struct content *) c;
|
|
object->next = NULL;
|
|
object->content = NULL;
|
|
object->box = box;
|
|
object->permitted_types = permitted_types;
|
|
object->background = background;
|
|
|
|
error = hlcache_handle_retrieve(url,
|
|
HLCACHE_RETRIEVE_SNIFF_TYPE,
|
|
content_get_url(&c->base), NULL,
|
|
html_object_callback, object, &child,
|
|
object->permitted_types, &object->content);
|
|
if (error != NSERROR_OK) {
|
|
free(object);
|
|
return error != NSERROR_NOMEM;
|
|
}
|
|
|
|
/* add to content object list */
|
|
object->next = c->object_list;
|
|
c->object_list = object;
|
|
|
|
c->num_objects++;
|
|
if (box != NULL) {
|
|
c->base.active++;
|
|
LOG(("%d fetches active", c->base.active));
|
|
}
|
|
|
|
return true;
|
|
}
|