mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-22 04:02:34 +03:00
b010a25771
handlers. + Disentangle all box tree manipulation from browser window code and put it where it belongs. + Move other content specific and other irrelevant code from browser window handling to appropriate places. + Put mouse state enum in new mouse header, since it's not just used by browser window code, and it is used by treeview windows on the treeview branch. svn path=/trunk/netsurf/; revision=10561
1400 lines
36 KiB
C
1400 lines
36 KiB
C
/*
|
|
* Copyright 2005-2007 James Bursa <bursa@users.sourceforge.net>
|
|
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
|
|
* Copyright 2005 John M Bell <jmb202@ecs.soton.ac.uk>
|
|
* Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
|
|
*
|
|
* This file is part of NetSurf, http://www.netsurf-browser.org/
|
|
*
|
|
* NetSurf is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* NetSurf is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/** \file
|
|
* Box tree manipulation (implementation).
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include "content/content_protected.h"
|
|
#include "content/hlcache.h"
|
|
#include "css/css.h"
|
|
#include "css/dump.h"
|
|
#include "desktop/scroll.h"
|
|
#include "desktop/options.h"
|
|
#include "render/box.h"
|
|
#include "render/form.h"
|
|
#include "render/html.h"
|
|
#include "utils/log.h"
|
|
#include "utils/talloc.h"
|
|
#include "utils/utils.h"
|
|
|
|
static bool box_contains_point(struct box *box, int x, int y, bool *physically);
|
|
static bool box_nearer_text_box(struct box *box, int bx, int by,
|
|
int x, int y, int dir, struct box **nearest, int *tx, int *ty,
|
|
int *nr_xd, int *nr_yd);
|
|
static bool box_nearest_text_box(struct box *box, int bx, int by,
|
|
int fx, int fy, int x, int y, int dir, struct box **nearest,
|
|
int *tx, int *ty, int *nr_xd, int *nr_yd);
|
|
|
|
#define box_is_float(box) (box->type == BOX_FLOAT_LEFT || \
|
|
box->type == BOX_FLOAT_RIGHT)
|
|
|
|
typedef struct box_duplicate_llist box_duplicate_llist;
|
|
struct box_duplicate_llist {
|
|
struct box_duplicate_llist *prev;
|
|
struct box *box;
|
|
};
|
|
static struct box_duplicate_llist *box_duplicate_last = NULL;
|
|
|
|
/**
|
|
* Allocator
|
|
*
|
|
* \param ptr Pointer to reallocate, or NULL for new allocation
|
|
* \param size Number of bytes requires
|
|
* \param pw Allocation context
|
|
* \return Pointer to allocated block, or NULL on failure
|
|
*/
|
|
void *box_style_alloc(void *ptr, size_t len, void *pw)
|
|
{
|
|
if (len == 0) {
|
|
free(ptr);
|
|
return NULL;
|
|
}
|
|
|
|
return realloc(ptr, len);
|
|
}
|
|
|
|
/**
|
|
* Destructor for box nodes which own styles
|
|
*
|
|
* @param b The box being destroyed.
|
|
* @return 0 to allow talloc to continue destroying the tree.
|
|
*/
|
|
static int
|
|
free_box_style(struct box *b)
|
|
{
|
|
if (b->style != NULL) {
|
|
css_computed_style_destroy(b->style);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Create a box tree node.
|
|
*
|
|
* \param style style for the box (not copied)
|
|
* \param href href for the box (not copied), or 0
|
|
* \param target target for the box (not copied), or 0
|
|
* \param title title for the box (not copied), or 0
|
|
* \param id id for the box (not copied), or 0
|
|
* \param context context for allocations
|
|
* \return allocated and initialised box, or 0 on memory exhaustion
|
|
*/
|
|
|
|
struct box * box_create(css_computed_style *style, bool style_owned,
|
|
char *href, const char *target, char *title, char *id,
|
|
void *context)
|
|
{
|
|
unsigned int i;
|
|
struct box *box;
|
|
|
|
box = talloc(context, struct box);
|
|
if (!box) {
|
|
return 0;
|
|
}
|
|
|
|
if (style_owned == true)
|
|
talloc_set_destructor(box, free_box_style);
|
|
|
|
box->type = BOX_INLINE;
|
|
box->style = style;
|
|
box->x = box->y = 0;
|
|
box->width = UNKNOWN_WIDTH;
|
|
box->height = 0;
|
|
box->descendant_x0 = box->descendant_y0 = 0;
|
|
box->descendant_x1 = box->descendant_y1 = 0;
|
|
for (i = 0; i != 4; i++)
|
|
box->margin[i] = box->padding[i] = box->border[i].width = 0;
|
|
box->scroll_x = box->scroll_y = NULL;
|
|
box->min_width = 0;
|
|
box->max_width = UNKNOWN_MAX_WIDTH;
|
|
box->byte_offset = 0;
|
|
box->text = NULL;
|
|
box->length = 0;
|
|
box->space = 0;
|
|
box->clone = 0;
|
|
box->strip_leading_newline = 0;
|
|
box->href = href;
|
|
box->target = target;
|
|
box->title = title;
|
|
box->columns = 1;
|
|
box->rows = 1;
|
|
box->start_column = 0;
|
|
box->inline_new_line = false;
|
|
box->printed = false;
|
|
box->next = NULL;
|
|
box->prev = NULL;
|
|
box->children = NULL;
|
|
box->last = NULL;
|
|
box->parent = NULL;
|
|
box->fallback = NULL;
|
|
box->inline_end = NULL;
|
|
box->float_children = NULL;
|
|
box->float_container = NULL;
|
|
box->next_float = NULL;
|
|
box->list_marker = NULL;
|
|
box->col = NULL;
|
|
box->gadget = NULL;
|
|
box->usemap = NULL;
|
|
box->id = id;
|
|
box->background = NULL;
|
|
box->object = NULL;
|
|
box->object_params = NULL;
|
|
|
|
return box;
|
|
}
|
|
|
|
/**
|
|
* Add a child to a box tree node.
|
|
*
|
|
* \param parent box giving birth
|
|
* \param child box to link as last child of parent
|
|
*/
|
|
|
|
void box_add_child(struct box *parent, struct box *child)
|
|
{
|
|
assert(parent);
|
|
assert(child);
|
|
|
|
if (parent->children != 0) { /* has children already */
|
|
parent->last->next = child;
|
|
child->prev = parent->last;
|
|
} else { /* this is the first child */
|
|
parent->children = child;
|
|
child->prev = 0;
|
|
}
|
|
|
|
parent->last = child;
|
|
child->parent = parent;
|
|
}
|
|
|
|
|
|
/**
|
|
* Insert a new box as a sibling to a box in a tree.
|
|
*
|
|
* \param box box already in tree
|
|
* \param new_box box to link into tree as next sibling
|
|
*/
|
|
|
|
void box_insert_sibling(struct box *box, struct box *new_box)
|
|
{
|
|
new_box->parent = box->parent;
|
|
new_box->prev = box;
|
|
new_box->next = box->next;
|
|
box->next = new_box;
|
|
if (new_box->next)
|
|
new_box->next->prev = new_box;
|
|
else if (new_box->parent)
|
|
new_box->parent->last = new_box;
|
|
}
|
|
|
|
|
|
/**
|
|
* Unlink a box from the box tree and then free it recursively.
|
|
*
|
|
* \param box box to unlink and free recursively.
|
|
*/
|
|
|
|
void box_unlink_and_free(struct box *box)
|
|
{
|
|
struct box *parent = box->parent;
|
|
struct box *next = box->next;
|
|
struct box *prev = box->prev;
|
|
|
|
if (parent) {
|
|
if (parent->children == box)
|
|
parent->children = next;
|
|
if (parent->last == box)
|
|
parent->last = next ? next : prev;
|
|
}
|
|
|
|
if (prev)
|
|
prev->next = next;
|
|
if (next)
|
|
next->prev = prev;
|
|
|
|
box_free(box);
|
|
}
|
|
|
|
|
|
/**
|
|
* Free a box tree recursively.
|
|
*
|
|
* \param box box to free recursively
|
|
*
|
|
* The box and all its children is freed.
|
|
*/
|
|
|
|
void box_free(struct box *box)
|
|
{
|
|
struct box *child, *next;
|
|
|
|
/* free children first */
|
|
for (child = box->children; child; child = next) {
|
|
next = child->next;
|
|
box_free(child);
|
|
}
|
|
|
|
/* last this box */
|
|
box_free_box(box);
|
|
}
|
|
|
|
|
|
/**
|
|
* Free the data in a single box structure.
|
|
*
|
|
* \param box box to free
|
|
*/
|
|
|
|
void box_free_box(struct box *box)
|
|
{
|
|
if (!box->clone) {
|
|
if (box->gadget)
|
|
form_free_control(box->gadget);
|
|
if (box->scroll_x != NULL)
|
|
scroll_destroy(box->scroll_x);
|
|
if (box->scroll_y != NULL)
|
|
scroll_destroy(box->scroll_y);
|
|
}
|
|
|
|
talloc_free(box);
|
|
}
|
|
|
|
|
|
/**
|
|
* Find the absolute coordinates of a box.
|
|
*
|
|
* \param box the box to calculate coordinates of
|
|
* \param x updated to x coordinate
|
|
* \param y updated to y coordinate
|
|
*/
|
|
|
|
void box_coords(struct box *box, int *x, int *y)
|
|
{
|
|
*x = box->x;
|
|
*y = box->y;
|
|
while (box->parent) {
|
|
if (box_is_float(box)) {
|
|
do {
|
|
box = box->parent;
|
|
} while (!box->float_children);
|
|
} else
|
|
box = box->parent;
|
|
*x += box->x - scroll_get_offset(box->scroll_x);
|
|
*y += box->y - scroll_get_offset(box->scroll_y);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Find the bounds of a box.
|
|
*
|
|
* \param box the box to calculate bounds of
|
|
* \param r receives bounds
|
|
*/
|
|
|
|
void box_bounds(struct box *box, struct rect *r)
|
|
{
|
|
int width, height;
|
|
|
|
box_coords(box, &r->x0, &r->y0);
|
|
|
|
width = box->padding[LEFT] + box->width + box->padding[RIGHT];
|
|
height = box->padding[TOP] + box->height + box->padding[BOTTOM];
|
|
|
|
r->x1 = r->x0 + width;
|
|
r->y1 = r->y0 + height;
|
|
}
|
|
|
|
|
|
/**
|
|
* Find the boxes at a point.
|
|
*
|
|
* \param box box to search children of
|
|
* \param x point to find, in global document coordinates
|
|
* \param y point to find, in global document coordinates
|
|
* \param box_x position of box, in global document coordinates, updated
|
|
* to position of returned box, if any
|
|
* \param box_y position of box, in global document coordinates, updated
|
|
* to position of returned box, if any
|
|
* \param content updated to content of object that returned box is in, if any
|
|
* \return box at given point, or 0 if none found
|
|
*
|
|
* To find all the boxes in the hierarchy at a certain point, use code like
|
|
* this:
|
|
* \code
|
|
* struct box *box = top_of_document_to_search;
|
|
* int box_x = 0, box_y = 0;
|
|
* struct content *content = document_to_search;
|
|
*
|
|
* while ((box = box_at_point(box, x, y, &box_x, &box_y, &content))) {
|
|
* // process box
|
|
* }
|
|
* \endcode
|
|
*/
|
|
|
|
struct box *box_at_point(struct box *box, const int x, const int y,
|
|
int *box_x, int *box_y,
|
|
hlcache_handle **content)
|
|
{
|
|
int bx = *box_x, by = *box_y;
|
|
struct box *child, *sibling;
|
|
bool physically;
|
|
|
|
assert(box);
|
|
|
|
/* drill into HTML objects */
|
|
if (box->object != NULL) {
|
|
struct box *layout;
|
|
|
|
if (content_get_type(box->object) == CONTENT_HTML &&
|
|
(layout = html_get_box_tree(box->object)) !=
|
|
NULL) {
|
|
*content = box->object;
|
|
box = layout;
|
|
} else {
|
|
goto siblings;
|
|
}
|
|
}
|
|
|
|
/* consider floats second, since they will often overlap other boxes */
|
|
for (child = box->float_children; child; child = child->next_float) {
|
|
if (box_contains_point(child, x - bx, y - by, &physically)) {
|
|
*box_x = bx + child->x -
|
|
scroll_get_offset(child->scroll_x);
|
|
*box_y = by + child->y -
|
|
scroll_get_offset(child->scroll_y);
|
|
|
|
if (physically)
|
|
return child;
|
|
else
|
|
return box_at_point(child, x, y, box_x, box_y,
|
|
content);
|
|
}
|
|
}
|
|
|
|
non_float_children:
|
|
/* non-float children */
|
|
for (child = box->children; child; child = child->next) {
|
|
if (box_is_float(child))
|
|
continue;
|
|
if (box_contains_point(child, x - bx, y - by, &physically)) {
|
|
*box_x = bx + child->x -
|
|
scroll_get_offset(child->scroll_x);
|
|
*box_y = by + child->y -
|
|
scroll_get_offset(child->scroll_y);
|
|
|
|
if (physically)
|
|
return child;
|
|
else
|
|
return box_at_point(child, x, y, box_x, box_y,
|
|
content);
|
|
}
|
|
}
|
|
|
|
/* marker boxes */
|
|
if (box->list_marker) {
|
|
if (box_contains_point(box->list_marker, x - bx, y - by,
|
|
&physically)) {
|
|
*box_x = bx + box->list_marker->x;
|
|
*box_y = by + box->list_marker->y;
|
|
return box->list_marker;
|
|
}
|
|
}
|
|
|
|
siblings:
|
|
/* siblings and siblings of ancestors */
|
|
while (box) {
|
|
if (box_is_float(box)) {
|
|
bx -= box->x - scroll_get_offset(box->scroll_x);
|
|
by -= box->y - scroll_get_offset(box->scroll_y);
|
|
for (sibling = box->next_float; sibling;
|
|
sibling = sibling->next_float) {
|
|
if (box_contains_point(sibling,
|
|
x - bx, y - by, &physically)) {
|
|
*box_x = bx + sibling->x -
|
|
scroll_get_offset(
|
|
sibling->scroll_x);
|
|
*box_y = by + sibling->y -
|
|
scroll_get_offset(
|
|
sibling->scroll_y);
|
|
|
|
if (physically)
|
|
return sibling;
|
|
else
|
|
return box_at_point(sibling,
|
|
x, y,
|
|
box_x, box_y,
|
|
content);
|
|
}
|
|
}
|
|
/* ascend to float's parent */
|
|
do {
|
|
box = box->parent;
|
|
} while (!box->float_children);
|
|
/* process non-float children of float's parent */
|
|
goto non_float_children;
|
|
|
|
} else {
|
|
bx -= box->x - scroll_get_offset(box->scroll_x);
|
|
by -= box->y - scroll_get_offset(box->scroll_y);
|
|
for (sibling = box->next; sibling;
|
|
sibling = sibling->next) {
|
|
if (box_is_float(sibling))
|
|
continue;
|
|
if (box_contains_point(sibling, x - bx, y - by,
|
|
&physically)) {
|
|
*box_x = bx + sibling->x -
|
|
scroll_get_offset(
|
|
sibling->scroll_x);
|
|
*box_y = by + sibling->y -
|
|
scroll_get_offset(
|
|
sibling->scroll_y);
|
|
|
|
if (physically)
|
|
return sibling;
|
|
else
|
|
return box_at_point(sibling,
|
|
x, y,
|
|
box_x, box_y,
|
|
content);
|
|
}
|
|
}
|
|
box = box->parent;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if a point lies within a box.
|
|
*
|
|
* \param box box to consider
|
|
* \param x coordinate relative to box parent
|
|
* \param y coordinate relative to box parent
|
|
* \param physically if function returning true, physically is set true if
|
|
* point is within the box's physical dimensions and false
|
|
* if the point is not within the box's physical dimensions
|
|
* but is in the area defined by the box's descendants.
|
|
* if function returning false, physically is undefined.
|
|
* \return true if the point is within the box or a descendant box
|
|
*
|
|
* This is a helper function for box_at_point().
|
|
*/
|
|
|
|
bool box_contains_point(struct box *box, int x, int y, bool *physically)
|
|
{
|
|
if (box->x <= x + box->border[LEFT].width &&
|
|
x < box->x + box->padding[LEFT] + box->width +
|
|
box->border[RIGHT].width + box->padding[RIGHT] &&
|
|
box->y <= y + box->border[TOP].width &&
|
|
y < box->y + box->padding[TOP] + box->height +
|
|
box->border[BOTTOM].width + box->padding[BOTTOM]) {
|
|
*physically = true;
|
|
return true;
|
|
}
|
|
if (box->list_marker && box->list_marker->x <= x +
|
|
box->list_marker->border[LEFT].width &&
|
|
x < box->list_marker->x +
|
|
box->list_marker->padding[LEFT] +
|
|
box->list_marker->width +
|
|
box->list_marker->border[RIGHT].width +
|
|
box->list_marker->padding[RIGHT] &&
|
|
box->list_marker->y <= y +
|
|
box->list_marker->border[TOP].width &&
|
|
y < box->list_marker->y +
|
|
box->list_marker->padding[TOP] +
|
|
box->list_marker->height +
|
|
box->list_marker->border[BOTTOM].width +
|
|
box->list_marker->padding[BOTTOM]) {
|
|
*physically = true;
|
|
return true;
|
|
}
|
|
if ((box->style && css_computed_overflow(box->style) ==
|
|
CSS_OVERFLOW_VISIBLE) || !box->style) {
|
|
if (box->x + box->descendant_x0 <= x &&
|
|
x < box->x + box->descendant_x1 &&
|
|
box->y + box->descendant_y0 <= y &&
|
|
y < box->y + box->descendant_y1) {
|
|
*physically = false;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
/**
|
|
* Find the box containing an object at the given coordinates, if any.
|
|
*
|
|
* \param h content to search, must have type CONTENT_HTML
|
|
* \param x coordinates in document units
|
|
* \param y coordinates in document units
|
|
*/
|
|
|
|
struct box *box_object_at_point(hlcache_handle *h, int x, int y)
|
|
{
|
|
struct content *c = hlcache_handle_get_content(h);
|
|
struct box *box;
|
|
int box_x = 0, box_y = 0;
|
|
hlcache_handle *content = h;
|
|
struct box *object_box = 0;
|
|
|
|
assert(c != NULL);
|
|
assert(c->type == CONTENT_HTML);
|
|
|
|
box = c->data.html.layout;
|
|
|
|
while ((box = box_at_point(box, x, y, &box_x, &box_y, &content))) {
|
|
if (box->style && css_computed_visibility(box->style) ==
|
|
CSS_VISIBILITY_HIDDEN)
|
|
continue;
|
|
|
|
if (box->object)
|
|
object_box = box;
|
|
}
|
|
|
|
return object_box;
|
|
}
|
|
|
|
|
|
/**
|
|
* Find the box containing an href at the given coordinates, if any.
|
|
*
|
|
* \param h content to search, must have type CONTENT_HTML
|
|
* \param x coordinates in document units
|
|
* \param y coordinates in document units
|
|
*/
|
|
|
|
struct box *box_href_at_point(hlcache_handle *h, int x, int y)
|
|
{
|
|
struct content *c = hlcache_handle_get_content(h);
|
|
struct box *box;
|
|
int box_x = 0, box_y = 0;
|
|
hlcache_handle *content = h;
|
|
struct box *href_box = 0;
|
|
|
|
assert(c != NULL);
|
|
assert(c->type == CONTENT_HTML);
|
|
|
|
box = c->data.html.layout;
|
|
|
|
while ((box = box_at_point(box, x, y, &box_x, &box_y, &content))) {
|
|
if (box->style && css_computed_visibility(box->style) ==
|
|
CSS_VISIBILITY_HIDDEN)
|
|
continue;
|
|
|
|
if (box->href)
|
|
href_box = box;
|
|
}
|
|
|
|
return href_box;
|
|
}
|
|
|
|
|
|
/**
|
|
* Check whether box is nearer mouse coordinates than current nearest box
|
|
*
|
|
* \param box box to test
|
|
* \param bx position of box, in global document coordinates
|
|
* \param by position of box, in global document coordinates
|
|
* \param x mouse point, in global document coordinates
|
|
* \param y mouse point, in global document coordinates
|
|
* \param dir direction in which to search (-1 = above-left,
|
|
* +1 = below-right)
|
|
* \param nearest nearest text box found, or NULL if none
|
|
* updated if box is nearer than existing nearest
|
|
* \param tx position of text_box, in global document coordinates
|
|
* updated if box is nearer than existing nearest
|
|
* \param ty position of text_box, in global document coordinates
|
|
* updated if box is nearer than existing nearest
|
|
* \param nr_xd distance to nearest text box found
|
|
* updated if box is nearer than existing nearest
|
|
* \param ny_yd distance to nearest text box found
|
|
* updated if box is nearer than existing nearest
|
|
* \return true if mouse point is inside box
|
|
*/
|
|
|
|
bool box_nearer_text_box(struct box *box, int bx, int by,
|
|
int x, int y, int dir, struct box **nearest, int *tx, int *ty,
|
|
int *nr_xd, int *nr_yd)
|
|
{
|
|
int w = box->padding[LEFT] + box->width + box->padding[RIGHT];
|
|
int h = box->padding[TOP] + box->height + box->padding[BOTTOM];
|
|
int y1 = by + h;
|
|
int x1 = bx + w;
|
|
int yd = INT_MAX;
|
|
int xd = INT_MAX;
|
|
|
|
if (x >= bx && x1 > x && y >= by && y1 > y) {
|
|
*nearest = box;
|
|
*tx = bx;
|
|
*ty = by;
|
|
return true;
|
|
}
|
|
|
|
if (box->parent->list_marker != box) {
|
|
if (dir < 0) {
|
|
/* consider only those children (partly) above-left */
|
|
if (by <= y && bx < x) {
|
|
yd = y <= y1 ? 0 : y - y1;
|
|
xd = x <= x1 ? 0 : x - x1;
|
|
}
|
|
} else {
|
|
/* consider only those children (partly) below-right */
|
|
if (y1 > y && x1 > x) {
|
|
yd = y > by ? 0 : by - y;
|
|
xd = x > bx ? 0 : bx - x;
|
|
}
|
|
}
|
|
|
|
/* give y displacement precedence over x */
|
|
if (yd < *nr_yd || (yd == *nr_yd && xd <= *nr_xd)) {
|
|
*nr_yd = yd;
|
|
*nr_xd = xd;
|
|
*nearest = box;
|
|
*tx = bx;
|
|
*ty = by;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
/**
|
|
* Pick the text box child of 'box' that is closest to and above-left
|
|
* (dir -ve) or below-right (dir +ve) of the point 'x,y'
|
|
*
|
|
* \param box parent box
|
|
* \param bx position of box, in global document coordinates
|
|
* \param by position of box, in global document coordinates
|
|
* \param fx position of float parent, in global document coordinates
|
|
* \param fy position of float parent, in global document coordinates
|
|
* \param x mouse point, in global document coordinates
|
|
* \param y mouse point, in global document coordinates
|
|
* \param dir direction in which to search (-1 = above-left,
|
|
* +1 = below-right)
|
|
* \param nearest nearest text box found, or NULL if none
|
|
* updated if a descendant of box is nearer than old nearest
|
|
* \param tx position of nearest, in global document coordinates
|
|
* updated if a descendant of box is nearer than old nearest
|
|
* \param ty position of nearest, in global document coordinates
|
|
* updated if a descendant of box is nearer than old nearest
|
|
* \param nr_xd distance to nearest text box found
|
|
* updated if a descendant of box is nearer than old nearest
|
|
* \param ny_yd distance to nearest text box found
|
|
* updated if a descendant of box is nearer than old nearest
|
|
* \return true if mouse point is inside text_box
|
|
*/
|
|
|
|
bool box_nearest_text_box(struct box *box, int bx, int by,
|
|
int fx, int fy, int x, int y, int dir, struct box **nearest,
|
|
int *tx, int *ty, int *nr_xd, int *nr_yd)
|
|
{
|
|
struct box *child = box->children;
|
|
int c_bx, c_by;
|
|
int c_fx, c_fy;
|
|
bool in_box = false;
|
|
|
|
if (*nearest == NULL) {
|
|
*nr_xd = INT_MAX / 2; /* displacement of 'nearest so far' */
|
|
*nr_yd = INT_MAX / 2;
|
|
}
|
|
if (box->type == BOX_INLINE_CONTAINER) {
|
|
int bw = box->padding[LEFT] + box->width + box->padding[RIGHT];
|
|
int bh = box->padding[TOP] + box->height + box->padding[BOTTOM];
|
|
int b_y1 = by + bh;
|
|
int b_x1 = bx + bw;
|
|
if (x >= bx && b_x1 > x && y >= by && b_y1 > y) {
|
|
in_box = true;
|
|
}
|
|
}
|
|
|
|
while (child) {
|
|
if (child->type == BOX_FLOAT_LEFT ||
|
|
child->type == BOX_FLOAT_RIGHT) {
|
|
c_bx = fx + child->x -
|
|
scroll_get_offset(child->scroll_x);
|
|
c_by = fy + child->y -
|
|
scroll_get_offset(child->scroll_y);
|
|
} else {
|
|
c_bx = bx + child->x -
|
|
scroll_get_offset(child->scroll_x);
|
|
c_by = by + child->y -
|
|
scroll_get_offset(child->scroll_y);
|
|
}
|
|
if (child->float_children) {
|
|
c_fx = c_bx;
|
|
c_fy = c_by;
|
|
} else {
|
|
c_fx = fx;
|
|
c_fy = fy;
|
|
}
|
|
if (in_box && child->text && !child->object) {
|
|
if (box_nearer_text_box(child,
|
|
c_bx, c_by, x, y, dir, nearest,
|
|
tx, ty, nr_xd, nr_yd))
|
|
return true;
|
|
} else {
|
|
if (child->list_marker) {
|
|
if (box_nearer_text_box(
|
|
child->list_marker,
|
|
c_bx + child->list_marker->x,
|
|
c_by + child->list_marker->y,
|
|
x, y, dir, nearest,
|
|
tx, ty, nr_xd, nr_yd))
|
|
return true;
|
|
}
|
|
if (box_nearest_text_box(child, c_bx, c_by,
|
|
c_fx, c_fy, x, y, dir, nearest, tx, ty,
|
|
nr_xd, nr_yd))
|
|
return true;
|
|
}
|
|
child = child->next;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
/**
|
|
* Peform pick text on browser window contents to locate the box under
|
|
* the mouse pointer, or nearest in the given direction if the pointer is
|
|
* not over a text box.
|
|
*
|
|
* \param h html content's high level cache handle
|
|
* \param x coordinate of mouse
|
|
* \param y coordinate of mouse
|
|
* \param dir direction to search (-1 = above-left, +1 = below-right)
|
|
* \param dx receives x ordinate of mouse relative to text box
|
|
* \param dy receives y ordinate of mouse relative to text box
|
|
*/
|
|
|
|
struct box *box_pick_text_box(hlcache_handle *h,
|
|
int x, int y, int dir, int *dx, int *dy)
|
|
{
|
|
struct box *text_box = NULL;
|
|
|
|
if (h && content_get_type(h) == CONTENT_HTML) {
|
|
struct box *box = html_get_box_tree(h);
|
|
int nr_xd, nr_yd;
|
|
int bx = box->margin[LEFT];
|
|
int by = box->margin[TOP];
|
|
int fx = bx;
|
|
int fy = by;
|
|
int tx, ty;
|
|
|
|
if (!box_nearest_text_box(box, bx, by, fx, fy, x, y,
|
|
dir, &text_box, &tx, &ty, &nr_xd, &nr_yd)) {
|
|
if (text_box && text_box->text && !text_box->object) {
|
|
int w = (text_box->padding[LEFT] +
|
|
text_box->width +
|
|
text_box->padding[RIGHT]);
|
|
int h = (text_box->padding[TOP] +
|
|
text_box->height +
|
|
text_box->padding[BOTTOM]);
|
|
int x1, y1;
|
|
|
|
y1 = ty + h;
|
|
x1 = tx + w;
|
|
|
|
/* ensure point lies within the text box */
|
|
if (x < tx) x = tx;
|
|
if (y < ty) y = ty;
|
|
if (y > y1) y = y1;
|
|
if (x > x1) x = x1;
|
|
}
|
|
}
|
|
|
|
/* return coordinates relative to box */
|
|
*dx = x - tx;
|
|
*dy = y - ty;
|
|
}
|
|
|
|
return text_box;
|
|
}
|
|
|
|
|
|
/**
|
|
* Find a box based upon its id attribute.
|
|
*
|
|
* \param box box tree to search
|
|
* \param id id to look for
|
|
* \return the box or 0 if not found
|
|
*/
|
|
|
|
struct box *box_find_by_id(struct box *box, const char *id)
|
|
{
|
|
struct box *a, *b;
|
|
|
|
if (box->id != NULL && strcmp(id, box->id) == 0)
|
|
return box;
|
|
|
|
for (a = box->children; a; a = a->next) {
|
|
if ((b = box_find_by_id(a, id)) != NULL)
|
|
return b;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if a box is visible when the tree is rendered.
|
|
*
|
|
* \param box box to check
|
|
* \return true iff the box is rendered
|
|
*/
|
|
|
|
bool box_visible(struct box *box)
|
|
{
|
|
struct box *fallback;
|
|
|
|
/* visibility: hidden */
|
|
if (box->style && css_computed_visibility(box->style) ==
|
|
CSS_VISIBILITY_HIDDEN)
|
|
return false;
|
|
|
|
/* check if a fallback */
|
|
while (box->parent) {
|
|
for (fallback = box->parent->fallback; fallback;
|
|
fallback = fallback->next)
|
|
if (fallback == box)
|
|
return false;
|
|
box = box->parent;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Print a box tree to a file.
|
|
*/
|
|
|
|
void box_dump(FILE *stream, struct box *box, unsigned int depth)
|
|
{
|
|
unsigned int i;
|
|
struct box *c, *prev;
|
|
|
|
for (i = 0; i != depth; i++)
|
|
fprintf(stream, " ");
|
|
|
|
fprintf(stream, "%p ", box);
|
|
fprintf(stream, "x%i y%i w%i h%i ", box->x, box->y,
|
|
box->width, box->height);
|
|
if (box->max_width != UNKNOWN_MAX_WIDTH)
|
|
fprintf(stream, "min%i max%i ", box->min_width, box->max_width);
|
|
fprintf(stream, "(%i %i %i %i) ",
|
|
box->descendant_x0, box->descendant_y0,
|
|
box->descendant_x1, box->descendant_y1);
|
|
|
|
fprintf(stream, "m(%i %i %i %i) ",
|
|
box->margin[TOP], box->margin[LEFT],
|
|
box->margin[BOTTOM], box->margin[RIGHT]);
|
|
|
|
switch (box->type) {
|
|
case BOX_BLOCK: fprintf(stream, "BLOCK "); break;
|
|
case BOX_INLINE_CONTAINER: fprintf(stream, "INLINE_CONTAINER "); break;
|
|
case BOX_INLINE: fprintf(stream, "INLINE "); break;
|
|
case BOX_INLINE_END: fprintf(stream, "INLINE_END "); break;
|
|
case BOX_INLINE_BLOCK: fprintf(stream, "INLINE_BLOCK "); break;
|
|
case BOX_TABLE: fprintf(stream, "TABLE [columns %i] ",
|
|
box->columns); break;
|
|
case BOX_TABLE_ROW: fprintf(stream, "TABLE_ROW "); break;
|
|
case BOX_TABLE_CELL: fprintf(stream, "TABLE_CELL [columns %i, "
|
|
"start %i, rows %i] ", box->columns,
|
|
box->start_column, box->rows); break;
|
|
case BOX_TABLE_ROW_GROUP: fprintf(stream, "TABLE_ROW_GROUP "); break;
|
|
case BOX_FLOAT_LEFT: fprintf(stream, "FLOAT_LEFT "); break;
|
|
case BOX_FLOAT_RIGHT: fprintf(stream, "FLOAT_RIGHT "); break;
|
|
case BOX_BR: fprintf(stream, "BR "); break;
|
|
case BOX_TEXT: fprintf(stream, "TEXT "); break;
|
|
default: fprintf(stream, "Unknown box type ");
|
|
}
|
|
|
|
if (box->text)
|
|
fprintf(stream, "%li '%.*s' ", (unsigned long) box->byte_offset,
|
|
(int) box->length, box->text);
|
|
if (box->space)
|
|
fprintf(stream, "space ");
|
|
if (box->object) {
|
|
fprintf(stream, "(object '%s') ",
|
|
content_get_url(box->object));
|
|
}
|
|
if (box->gadget)
|
|
fprintf(stream, "(gadget) ");
|
|
if (box->style)
|
|
nscss_dump_computed_style(stream, box->style);
|
|
if (box->href)
|
|
fprintf(stream, " -> '%s'", box->href);
|
|
if (box->target)
|
|
fprintf(stream, " |%s|", box->target);
|
|
if (box->title)
|
|
fprintf(stream, " [%s]", box->title);
|
|
if (box->id)
|
|
fprintf(stream, " <%s>", box->id);
|
|
if (box->type == BOX_INLINE || box->type == BOX_INLINE_END)
|
|
fprintf(stream, " inline_end %p", box->inline_end);
|
|
if (box->float_children)
|
|
fprintf(stream, " float_children %p", box->float_children);
|
|
if (box->next_float)
|
|
fprintf(stream, " next_float %p", box->next_float);
|
|
if (box->col) {
|
|
fprintf(stream, " (columns");
|
|
for (i = 0; i != box->columns; i++)
|
|
fprintf(stream, " (%s %s %i %i %i)",
|
|
((const char *[]) {"UNKNOWN", "FIXED",
|
|
"AUTO", "PERCENT", "RELATIVE"})
|
|
[box->col[i].type],
|
|
((const char *[]) {"normal",
|
|
"positioned"})
|
|
[box->col[i].positioned],
|
|
box->col[i].width,
|
|
box->col[i].min, box->col[i].max);
|
|
fprintf(stream, ")");
|
|
}
|
|
fprintf(stream, "\n");
|
|
|
|
if (box->list_marker) {
|
|
for (i = 0; i != depth; i++)
|
|
fprintf(stream, " ");
|
|
fprintf(stream, "list_marker:\n");
|
|
box_dump(stream, box->list_marker, depth + 1);
|
|
}
|
|
|
|
for (c = box->children; c && c->next; c = c->next)
|
|
;
|
|
if (box->last != c)
|
|
fprintf(stream, "warning: box->last %p (should be %p) "
|
|
"(box %p)\n", box->last, c, box);
|
|
for (prev = 0, c = box->children; c; prev = c, c = c->next) {
|
|
if (c->parent != box)
|
|
fprintf(stream, "warning: box->parent %p (should be "
|
|
"%p) (box on next line)\n",
|
|
c->parent, box);
|
|
if (c->prev != prev)
|
|
fprintf(stream, "warning: box->prev %p (should be "
|
|
"%p) (box on next line)\n",
|
|
c->prev, prev);
|
|
box_dump(stream, c, depth + 1);
|
|
}
|
|
if (box->fallback) {
|
|
for (i = 0; i != depth; i++)
|
|
fprintf(stream, " ");
|
|
fprintf(stream, "fallback:\n");
|
|
for (c = box->fallback; c; c = c->next)
|
|
box_dump(stream, c, depth + 1);
|
|
}
|
|
}
|
|
|
|
/* Box tree duplication below
|
|
*/
|
|
|
|
/** structure for translating addresses in the box tree */
|
|
struct box_dict_element{
|
|
struct box *old, *new;
|
|
};
|
|
|
|
static bool box_duplicate_main_tree(struct box *box, struct content *c,
|
|
int *count);
|
|
static void box_duplicate_create_dict(struct box *old_box, struct box *new_box,
|
|
struct box_dict_element **dict);
|
|
static void box_duplicate_update( struct box *box,
|
|
struct box_dict_element *dict,
|
|
int n);
|
|
|
|
static int box_compare_dict_elements(const struct box_dict_element *a,
|
|
const struct box_dict_element *b);
|
|
|
|
int box_compare_dict_elements(const struct box_dict_element *a,
|
|
const struct box_dict_element *b)
|
|
{
|
|
return (a->old < b->old) ? -1 : ((a->old > b->old) ? 1 : 0);
|
|
}
|
|
|
|
/** Duplication of a box tree. We assume that all the content is fetched,
|
|
fallbacks have been applied where necessary and we reuse a lot of content
|
|
like strings, fetched objects etc - just replicating all we need to create
|
|
two different layouts.
|
|
\return true on success, false on lack of memory
|
|
*/
|
|
struct box* box_duplicate_tree(struct box *root, struct content *c)
|
|
{
|
|
struct box *new_root;/**< Root of the new box tree*/
|
|
int box_number = 0;
|
|
struct box_dict_element *box_dict, *box_dict_end;
|
|
|
|
box_duplicate_last = NULL;
|
|
|
|
/* 1. Duplicate parent - children structure, list_markers*/
|
|
new_root = talloc_memdup(c, root, sizeof (struct box));
|
|
if (!box_duplicate_main_tree(new_root, c, &box_number))
|
|
return NULL;
|
|
|
|
/* 2. Create address translation dictionary*/
|
|
/*TODO: dont save unnecessary addresses*/
|
|
|
|
box_dict_end = box_dict = malloc(box_number *
|
|
sizeof(struct box_dict_element));
|
|
|
|
if (box_dict == NULL)
|
|
return NULL;
|
|
box_duplicate_create_dict(root, new_root, &box_dict_end);
|
|
|
|
assert((box_dict_end - box_dict) == box_number);
|
|
|
|
/*3. Sort it*/
|
|
|
|
qsort(box_dict, (box_dict_end - box_dict), sizeof(struct box_dict_element),
|
|
(int (*)(const void *, const void *))box_compare_dict_elements);
|
|
|
|
/* 4. Update inline_end and float_children pointers */
|
|
|
|
box_duplicate_update(new_root, box_dict, (box_dict_end - box_dict));
|
|
|
|
free(box_dict);
|
|
|
|
return new_root;
|
|
}
|
|
|
|
/**
|
|
* Recursively duplicates children of an element, and also if present - its
|
|
* list_marker, style and text.
|
|
* \param box Current box to duplicate its children
|
|
* \param c talloc memory pool
|
|
* \param count number of boxes seen so far
|
|
* \return true if successful, false otherwise (lack of memory)
|
|
*/
|
|
bool box_duplicate_main_tree(struct box *box, struct content *c, int *count)
|
|
{
|
|
struct box *b, *prev;
|
|
|
|
prev = NULL;
|
|
|
|
for (b = box->children; b; b = b->next) {
|
|
struct box *copy;
|
|
|
|
/*Copy child*/
|
|
copy = talloc_memdup(c, b, sizeof (struct box));
|
|
if (copy == NULL)
|
|
return false;
|
|
|
|
copy->parent = box;
|
|
|
|
if (prev != NULL)
|
|
prev->next = copy;
|
|
else
|
|
box->children = copy;
|
|
|
|
if (copy->type == BOX_INLINE) {
|
|
struct box_duplicate_llist *temp;
|
|
|
|
temp = malloc(sizeof(struct box_duplicate_llist));
|
|
if (temp == NULL)
|
|
return false;
|
|
temp->prev = box_duplicate_last;
|
|
temp->box = copy;
|
|
box_duplicate_last = temp;
|
|
}
|
|
else if (copy->type == BOX_INLINE_END) {
|
|
struct box_duplicate_llist *temp;
|
|
|
|
box_duplicate_last->box->inline_end = copy;
|
|
copy->inline_end = box_duplicate_last->box;
|
|
|
|
temp = box_duplicate_last;
|
|
box_duplicate_last = temp->prev;
|
|
free(temp);
|
|
}
|
|
|
|
/* Recursively visit child */
|
|
if (!box_duplicate_main_tree(copy, c, count))
|
|
return false;
|
|
|
|
prev = copy;
|
|
}
|
|
|
|
box->last = prev;
|
|
|
|
if (box->object != NULL && option_suppress_images && (
|
|
#ifdef WITH_JPEG
|
|
content_get_type(box->object) == CONTENT_JPEG ||
|
|
#endif
|
|
#ifdef WITH_GIF
|
|
content_get_type(box->object) == CONTENT_GIF ||
|
|
#endif
|
|
#ifdef WITH_BMP
|
|
content_get_type(box->object) == CONTENT_BMP ||
|
|
content_get_type(box->object) == CONTENT_ICO ||
|
|
#endif
|
|
#if defined(WITH_MNG) || defined(WITH_PNG)
|
|
content_get_type(box->object) == CONTENT_PNG ||
|
|
#endif
|
|
#ifdef WITH_MNG
|
|
content_get_type(box->object) == CONTENT_JNG ||
|
|
content_get_type(box->object) == CONTENT_MNG ||
|
|
#endif
|
|
#if defined(WITH_SPRITE) || defined(WITH_NSSPRITE)
|
|
content_get_type(box->object) == CONTENT_SPRITE ||
|
|
#endif
|
|
#ifdef WITH_DRAW
|
|
content_get_type(box->object) == CONTENT_DRAW ||
|
|
#endif
|
|
#ifdef WITH_PLUGIN
|
|
content_get_type(box->object) == CONTENT_PLUGIN ||
|
|
#endif
|
|
content_get_type(box->object) == CONTENT_DIRECTORY ||
|
|
#ifdef WITH_THEME_INSTALL
|
|
content_get_type(box->object) == CONTENT_THEME ||
|
|
#endif
|
|
#ifdef WITH_ARTWORKS
|
|
content_get_type(box->object) == CONTENT_ARTWORKS ||
|
|
#endif
|
|
#if defined(WITH_NS_SVG) || defined(WITH_RSVG)
|
|
content_get_type(box->object) == CONTENT_SVG ||
|
|
#endif
|
|
false))
|
|
box->object = NULL;
|
|
|
|
if (box->list_marker) {
|
|
box->list_marker = talloc_memdup(c, box->list_marker,
|
|
sizeof *box->list_marker);
|
|
if (box->list_marker == NULL)
|
|
return false;
|
|
box->list_marker->parent = box;
|
|
}
|
|
|
|
if (box->text) {
|
|
box->text = talloc_memdup(c, box->text, box->length);
|
|
if (box->text == NULL)
|
|
return false;
|
|
}
|
|
|
|
if (box->style) {
|
|
box->style = talloc_memdup(c, box->style, sizeof *box->style);
|
|
if (box->style == NULL)
|
|
return false;
|
|
}
|
|
|
|
/*Make layout calculate the size of this element later
|
|
(might change because of font change etc.) */
|
|
box->width = UNKNOWN_WIDTH;
|
|
box->min_width = 0;
|
|
box->max_width = UNKNOWN_MAX_WIDTH;
|
|
|
|
(*count)++;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Recursively creates a dictionary of addresses - binding the address of a box
|
|
* with its copy.
|
|
* \param old_box original box
|
|
* \param new_box copy of the original box
|
|
* \param dict pointer to a pointer to the current position in the dictionary
|
|
*/
|
|
void box_duplicate_create_dict(struct box *old_box, struct box *new_box,
|
|
struct box_dict_element **dict)
|
|
{
|
|
/**Children of the old and new boxes*/
|
|
struct box *b_old, *b_new;
|
|
|
|
for (b_old = old_box->children, b_new = new_box->children;
|
|
b_old != NULL && b_new != NULL;
|
|
b_old = b_old->next, b_new = b_new->next)
|
|
box_duplicate_create_dict(b_old, b_new, dict);
|
|
|
|
/*The new tree should be a exact copy*/
|
|
assert(b_old == NULL && b_new == NULL);
|
|
|
|
(*dict)->old = old_box;
|
|
(*dict)->new = new_box;
|
|
(*dict)++;
|
|
}
|
|
|
|
/**
|
|
* Recursively updates pointers in box tree.
|
|
* \param box current box in the new box tree
|
|
* \param box_dict box pointers dictionary
|
|
* \param n number of memory addresses in the dictionary
|
|
*/
|
|
void box_duplicate_update(struct box *box,
|
|
struct box_dict_element *box_dict,
|
|
int n)
|
|
{
|
|
struct box_dict_element *box_dict_element;
|
|
struct box *b;
|
|
struct box_dict_element element;
|
|
|
|
for (b = box->children; b; b = b->next)
|
|
box_duplicate_update(b, box_dict, n);
|
|
|
|
if (box->float_children) {
|
|
element.old = box->float_children;
|
|
box_dict_element = bsearch(&element,
|
|
box_dict, n,
|
|
sizeof(struct box_dict_element),
|
|
(int (*)(const void *, const void *))box_compare_dict_elements);
|
|
box->float_children = box_dict_element->new;
|
|
}
|
|
|
|
if (box->next_float) {
|
|
element.old = box->next_float;
|
|
box_dict_element = bsearch(&element,
|
|
box_dict, n,
|
|
sizeof(struct box_dict_element),
|
|
(int (*)(const void *, const void *))box_compare_dict_elements);
|
|
box->next_float = box_dict_element->new;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Applies the given scroll setup to a box. This includes scroll
|
|
* creation/deletion as well as scroll dimension updates.
|
|
*
|
|
* \param bw browser window in which the box is located
|
|
* \param box the box to handle the scrolls for
|
|
* \param bottom whether the horizontal scrollbar should be present
|
|
* \param right whether the vertical scrollbar should be present
|
|
* \return true on success false otherwise
|
|
*/
|
|
bool box_handle_scrollbars(struct browser_window *bw, struct box *box,
|
|
bool bottom, bool right)
|
|
{
|
|
struct browser_scroll_data *data;
|
|
int padding_width, padding_height;
|
|
|
|
padding_width = box->width + box->padding[RIGHT] + box->padding[LEFT];
|
|
padding_height = box->height + box->padding[TOP] + box->padding[BOTTOM];
|
|
|
|
if (!bottom && box->scroll_x != NULL) {
|
|
data = scroll_get_data(box->scroll_x);
|
|
scroll_destroy(box->scroll_x);
|
|
free(data);
|
|
box->scroll_x = NULL;
|
|
}
|
|
|
|
if (!right && box->scroll_y != NULL) {
|
|
data = scroll_get_data(box->scroll_y);
|
|
scroll_destroy(box->scroll_y);
|
|
free(data);
|
|
box->scroll_y = NULL;
|
|
}
|
|
|
|
if (!bottom && !right)
|
|
return true;
|
|
|
|
if (right) {
|
|
if (box->scroll_y == NULL) {
|
|
data = malloc(sizeof(struct browser_scroll_data));
|
|
if (data == NULL) {
|
|
LOG(("malloc failed"));
|
|
warn_user("NoMemory", 0);
|
|
return false;
|
|
}
|
|
data->bw = bw;
|
|
data->box = box;
|
|
if (!scroll_create(false,
|
|
padding_height,
|
|
box->descendant_y1 - box->descendant_y0,
|
|
box->height,
|
|
data,
|
|
html_overflow_scroll_callback,
|
|
&(box->scroll_y)))
|
|
return false;
|
|
} else
|
|
scroll_set_extents(box->scroll_y,
|
|
padding_height, box->height,
|
|
box->descendant_y1 -
|
|
box->descendant_y0);
|
|
}
|
|
if (bottom) {
|
|
if (box->scroll_x == NULL) {
|
|
data = malloc(sizeof(struct browser_scroll_data));
|
|
if (data == NULL) {
|
|
LOG(("malloc failed"));
|
|
warn_user("NoMemory", 0);
|
|
return false;
|
|
}
|
|
data->bw = bw;
|
|
data->box = box;
|
|
if (!scroll_create(true,
|
|
padding_width -
|
|
(right ? SCROLLBAR_WIDTH : 0),
|
|
box->descendant_x1 - box->descendant_x0,
|
|
box->width,
|
|
data,
|
|
html_overflow_scroll_callback,
|
|
&box->scroll_x))
|
|
return false;
|
|
} else
|
|
scroll_set_extents(box->scroll_x,
|
|
padding_width -
|
|
(right ? SCROLLBAR_WIDTH : 0),
|
|
box->width,
|
|
box->descendant_x1 -
|
|
box->descendant_x0);
|
|
}
|
|
|
|
if (right && bottom)
|
|
scroll_make_pair(box->scroll_x, box->scroll_y);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Determine if a box has a vertical scrollbar.
|
|
*
|
|
* \param box scrolling box
|
|
* \return the box has a vertical scrollbar
|
|
*/
|
|
|
|
bool box_vscrollbar_present(const struct box * const box)
|
|
{
|
|
return box->descendant_y0 < -box->border[TOP].width ||
|
|
box->padding[TOP] + box->height + box->padding[BOTTOM] +
|
|
box->border[BOTTOM].width < box->descendant_y1;
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if a box has a horizontal scrollbar.
|
|
*
|
|
* \param box scrolling box
|
|
* \return the box has a horizontal scrollbar
|
|
*/
|
|
|
|
bool box_hscrollbar_present(const struct box * const box)
|
|
{
|
|
return box->descendant_x0 < -box->border[LEFT].width ||
|
|
box->padding[LEFT] + box->width + box->padding[RIGHT] +
|
|
box->border[RIGHT].width < box->descendant_x1;
|
|
}
|