mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-24 04:56:50 +03:00
890 lines
22 KiB
C
890 lines
22 KiB
C
/*
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* Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
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* Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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* implementation of box tree inspection.
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*/
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#include <stdio.h>
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#include <dom/dom.h>
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#include "utils/nsurl.h"
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#include "utils/errors.h"
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#include "netsurf/types.h"
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#include "netsurf/content.h"
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#include "netsurf/mouse.h"
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#include "css/utils.h"
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#include "css/dump.h"
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#include "desktop/scrollbar.h"
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#include "html/private.h"
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#include "html/box.h"
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#include "html/box_inspect.h"
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/**
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* Direction to move in a box-tree walk
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*/
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enum box_walk_dir {
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BOX_WALK_CHILDREN,
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BOX_WALK_PARENT,
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BOX_WALK_NEXT_SIBLING,
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BOX_WALK_FLOAT_CHILDREN,
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BOX_WALK_NEXT_FLOAT_SIBLING,
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BOX_WALK_FLOAT_CONTAINER
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};
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#define box_is_float(box) (box->type == BOX_FLOAT_LEFT || \
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box->type == BOX_FLOAT_RIGHT)
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/**
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* Determine if a point lies within a box.
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*
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* \param[in] unit_len_ctx CSS length conversion context to use.
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* \param[in] box Box to consider
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* \param[in] x Coordinate relative to box
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* \param[in] y Coordinate relative to box
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* \param[out] physically If function returning true, physically is set true
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* iff point is within the box's physical dimensions and
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* false if the point is not within the box's physical
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* dimensions but is in the area defined by the box's
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* descendants. If function returns false, physically
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* is undefined.
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* \return true if the point is within the box or a descendant box
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*
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* This is a helper function for box_at_point().
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*/
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static bool
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box_contains_point(const css_unit_ctx *unit_len_ctx,
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const struct box *box,
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int x,
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int y,
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bool *physically)
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{
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css_computed_clip_rect css_rect;
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if (box->style != NULL &&
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css_computed_position(box->style) == CSS_POSITION_ABSOLUTE &&
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css_computed_clip(box->style, &css_rect) == CSS_CLIP_RECT) {
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/* We have an absolutly positioned box with a clip rect */
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struct rect r = {
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.x0 = box->border[LEFT].width,
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.y0 = box->border[TOP].width,
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.x1 = box->padding[LEFT] + box->width +
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box->border[RIGHT].width +
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box->padding[RIGHT],
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.y1 = box->padding[TOP] + box->height +
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box->border[BOTTOM].width +
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box->padding[BOTTOM]
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};
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if (x >= r.x0 && x < r.x1 && y >= r.y0 && y < r.y1) {
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*physically = true;
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} else {
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*physically = false;
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}
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/* Adjust rect to css clip region */
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if (css_rect.left_auto == false) {
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r.x0 += FIXTOINT(css_unit_len2device_px(
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box->style,
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unit_len_ctx,
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css_rect.left,
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css_rect.lunit));
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}
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if (css_rect.top_auto == false) {
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r.y0 += FIXTOINT(css_unit_len2device_px(
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box->style,
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unit_len_ctx,
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css_rect.top,
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css_rect.tunit));
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}
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if (css_rect.right_auto == false) {
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r.x1 = box->border[LEFT].width +
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FIXTOINT(css_unit_len2device_px(
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box->style,
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unit_len_ctx,
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css_rect.right,
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css_rect.runit));
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}
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if (css_rect.bottom_auto == false) {
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r.y1 = box->border[TOP].width +
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FIXTOINT(css_unit_len2device_px(
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box->style,
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unit_len_ctx,
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css_rect.bottom,
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css_rect.bunit));
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}
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/* Test if point is in clipped box */
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if (x >= r.x0 && x < r.x1 && y >= r.y0 && y < r.y1) {
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/* inside clip area */
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return true;
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}
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/* Not inside clip area */
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return false;
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}
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if (x >= -box->border[LEFT].width &&
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x < box->padding[LEFT] + box->width +
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box->padding[RIGHT] + box->border[RIGHT].width &&
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y >= -box->border[TOP].width &&
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y < box->padding[TOP] + box->height +
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box->padding[BOTTOM] + box->border[BOTTOM].width) {
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*physically = true;
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return true;
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}
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if (box->list_marker && box->list_marker->x - box->x <= x +
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box->list_marker->border[LEFT].width &&
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x < box->list_marker->x - box->x +
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box->list_marker->padding[LEFT] +
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box->list_marker->width +
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box->list_marker->border[RIGHT].width +
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box->list_marker->padding[RIGHT] &&
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box->list_marker->y - box->y <= y +
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box->list_marker->border[TOP].width &&
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y < box->list_marker->y - box->y +
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box->list_marker->padding[TOP] +
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box->list_marker->height +
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box->list_marker->border[BOTTOM].width +
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box->list_marker->padding[BOTTOM]) {
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*physically = true;
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return true;
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}
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if ((box->style && css_computed_overflow_x(box->style) ==
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CSS_OVERFLOW_VISIBLE) || !box->style) {
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if (box->descendant_x0 <= x &&
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x < box->descendant_x1) {
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*physically = false;
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return true;
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}
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}
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if ((box->style && css_computed_overflow_y(box->style) ==
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CSS_OVERFLOW_VISIBLE) || !box->style) {
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if (box->descendant_y0 <= y &&
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y < box->descendant_y1) {
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*physically = false;
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return true;
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}
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}
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return false;
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}
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/**
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* Move from box to next box in given direction, adjusting for box coord change
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*
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* \param b box to move from from
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* \param dir direction to move in
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* \param x box's global x-coord, updated to position of next box
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* \param y box's global y-coord, updated to position of next box
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*
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* If no box can be found in given direction, NULL is returned.
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*/
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static inline struct box *
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box_move_xy(struct box *b, enum box_walk_dir dir, int *x, int *y)
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{
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struct box *rb = NULL;
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switch (dir) {
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case BOX_WALK_CHILDREN:
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b = b->children;
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if (b == NULL)
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break;
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*x += b->x;
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*y += b->y;
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if (!box_is_float(b)) {
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rb = b;
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break;
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}
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/* fall through */
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case BOX_WALK_NEXT_SIBLING:
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do {
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*x -= b->x;
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*y -= b->y;
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b = b->next;
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if (b == NULL)
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break;
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*x += b->x;
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*y += b->y;
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} while (box_is_float(b));
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rb = b;
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break;
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case BOX_WALK_PARENT:
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*x -= b->x;
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*y -= b->y;
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rb = b->parent;
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break;
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case BOX_WALK_FLOAT_CHILDREN:
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b = b->float_children;
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if (b == NULL)
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break;
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*x += b->x;
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*y += b->y;
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rb = b;
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break;
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case BOX_WALK_NEXT_FLOAT_SIBLING:
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*x -= b->x;
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*y -= b->y;
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b = b->next_float;
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if (b == NULL)
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break;
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*x += b->x;
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*y += b->y;
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rb = b;
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break;
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case BOX_WALK_FLOAT_CONTAINER:
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*x -= b->x;
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*y -= b->y;
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rb = b->float_container;
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break;
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default:
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assert(0 && "Bad box walk type.");
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}
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return rb;
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}
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/**
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* Itterator for walking to next box in interaction order
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*
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* \param b box to find next box from
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* \param x box's global x-coord, updated to position of next box
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* \param y box's global y-coord, updated to position of next box
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* \param skip_children whether to skip box's children
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*
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* This walks to a boxes float children before its children. When walking
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* children, floating boxes are skipped.
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*/
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static inline struct box *
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box_next_xy(struct box *b, int *x, int *y, bool skip_children)
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{
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struct box *n;
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int tx, ty;
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assert(b != NULL);
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if (skip_children) {
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/* Caller is not interested in any kind of children */
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goto skip_children;
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}
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tx = *x; ty = *y;
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n = box_move_xy(b, BOX_WALK_FLOAT_CHILDREN, &tx, &ty);
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if (n) {
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/* Next node is float child */
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*x = tx;
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*y = ty;
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return n;
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}
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done_float_children:
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tx = *x; ty = *y;
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n = box_move_xy(b, BOX_WALK_CHILDREN, &tx, &ty);
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if (n) {
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/* Next node is child */
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*x = tx;
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*y = ty;
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return n;
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}
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skip_children:
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tx = *x; ty = *y;
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n = box_move_xy(b, BOX_WALK_NEXT_FLOAT_SIBLING, &tx, &ty);
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if (n) {
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/* Go to next float sibling */
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*x = tx;
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*y = ty;
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return n;
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}
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if (box_is_float(b)) {
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/* Done floats, but the float container may have children,
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* or siblings, or ansestors with siblings. Change to
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* float container and move past handling its float children.
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*/
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b = box_move_xy(b, BOX_WALK_FLOAT_CONTAINER, x, y);
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goto done_float_children;
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}
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/* Go to next sibling, or nearest ancestor with next sibling. */
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while (b) {
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while (!b->next && b->parent) {
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b = box_move_xy(b, BOX_WALK_PARENT, x, y);
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if (box_is_float(b)) {
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/* Go on to next float, if there is one */
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goto skip_children;
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}
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}
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if (!b->next) {
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/* No more boxes */
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return NULL;
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}
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tx = *x; ty = *y;
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n = box_move_xy(b, BOX_WALK_NEXT_SIBLING, &tx, &ty);
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if (n) {
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/* Go to non-float (ancestor) sibling */
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*x = tx;
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*y = ty;
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return n;
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} else if (b->parent) {
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b = box_move_xy(b, BOX_WALK_PARENT, x, y);
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if (box_is_float(b)) {
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/* Go on to next float, if there is one */
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goto skip_children;
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}
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} else {
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/* No more boxes */
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return NULL;
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}
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}
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assert(b != NULL);
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return NULL;
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}
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/**
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* Check whether box is nearer mouse coordinates than current nearest box
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*
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* \param box box to test
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* \param bx position of box, in global document coordinates
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* \param by position of box, in global document coordinates
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* \param x mouse point, in global document coordinates
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* \param y mouse point, in global document coordinates
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* \param dir direction in which to search (-1 = above-left,
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* +1 = below-right)
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* \param nearest nearest text box found, or NULL if none
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* updated if box is nearer than existing nearest
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* \param tx position of text_box, in global document coordinates
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* updated if box is nearer than existing nearest
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* \param ty position of text_box, in global document coordinates
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* updated if box is nearer than existing nearest
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* \param nr_xd distance to nearest text box found
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* updated if box is nearer than existing nearest
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* \param nr_yd distance to nearest text box found
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* updated if box is nearer than existing nearest
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* \return true if mouse point is inside box
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*/
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static bool
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box_nearer_text_box(struct box *box,
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int bx, int by,
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int x, int y,
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int dir,
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struct box **nearest,
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int *tx, int *ty,
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int *nr_xd, int *nr_yd)
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{
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int w = box->padding[LEFT] + box->width + box->padding[RIGHT];
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int h = box->padding[TOP] + box->height + box->padding[BOTTOM];
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int y1 = by + h;
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int x1 = bx + w;
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int yd = INT_MAX;
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int xd = INT_MAX;
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if (x >= bx && x1 > x && y >= by && y1 > y) {
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*nearest = box;
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*tx = bx;
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*ty = by;
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return true;
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}
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if (box->parent->list_marker != box) {
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if (dir < 0) {
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/* consider only those children (partly) above-left */
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if (by <= y && bx < x) {
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yd = y <= y1 ? 0 : y - y1;
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xd = x <= x1 ? 0 : x - x1;
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}
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} else {
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/* consider only those children (partly) below-right */
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if (y1 > y && x1 > x) {
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yd = y > by ? 0 : by - y;
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xd = x > bx ? 0 : bx - x;
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}
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}
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/* give y displacement precedence over x */
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if (yd < *nr_yd || (yd == *nr_yd && xd <= *nr_xd)) {
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*nr_yd = yd;
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*nr_xd = xd;
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*nearest = box;
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*tx = bx;
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*ty = by;
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}
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}
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return false;
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}
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|
|
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/**
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* Pick the text box child of 'box' that is closest to and above-left
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* (dir -ve) or below-right (dir +ve) of the point 'x,y'
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*
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* \param box parent box
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* \param bx position of box, in global document coordinates
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* \param by position of box, in global document coordinates
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* \param fx position of float parent, in global document coordinates
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* \param fy position of float parent, in global document coordinates
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* \param x mouse point, in global document coordinates
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* \param y mouse point, in global document coordinates
|
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* \param dir direction in which to search (-1 = above-left,
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* +1 = below-right)
|
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* \param nearest nearest text box found, or NULL if none
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* updated if a descendant of box is nearer than old nearest
|
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* \param tx position of nearest, in global document coordinates
|
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* updated if a descendant of box is nearer than old nearest
|
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* \param ty position of nearest, in global document coordinates
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* updated if a descendant of box is nearer than old nearest
|
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* \param nr_xd distance to nearest text box found
|
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* updated if a descendant of box is nearer than old nearest
|
|
* \param nr_yd distance to nearest text box found
|
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* updated if a descendant of box is nearer than old nearest
|
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* \return true if mouse point is inside text_box
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*/
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static bool
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box_nearest_text_box(struct box *box,
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int bx, int by,
|
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int fx, int fy,
|
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int x, int y,
|
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int dir,
|
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struct box **nearest,
|
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int *tx, int *ty,
|
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int *nr_xd, int *nr_yd)
|
|
{
|
|
struct box *child = box->children;
|
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int c_bx, c_by;
|
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int c_fx, c_fy;
|
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bool in_box = false;
|
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|
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if (*nearest == NULL) {
|
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*nr_xd = INT_MAX / 2; /* displacement of 'nearest so far' */
|
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*nr_yd = INT_MAX / 2;
|
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}
|
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if (box->type == BOX_INLINE_CONTAINER) {
|
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int bw = box->padding[LEFT] + box->width + box->padding[RIGHT];
|
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int bh = box->padding[TOP] + box->height + box->padding[BOTTOM];
|
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int b_y1 = by + bh;
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int b_x1 = bx + bw;
|
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if (x >= bx && b_x1 > x && y >= by && b_y1 > y) {
|
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in_box = true;
|
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}
|
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}
|
|
|
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while (child) {
|
|
if (child->type == BOX_FLOAT_LEFT ||
|
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child->type == BOX_FLOAT_RIGHT) {
|
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c_bx = fx + child->x -
|
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scrollbar_get_offset(child->scroll_x);
|
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c_by = fy + child->y -
|
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scrollbar_get_offset(child->scroll_y);
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} else {
|
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c_bx = bx + child->x -
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scrollbar_get_offset(child->scroll_x);
|
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c_by = by + child->y -
|
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scrollbar_get_offset(child->scroll_y);
|
|
}
|
|
if (child->float_children) {
|
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c_fx = c_bx;
|
|
c_fy = c_by;
|
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} else {
|
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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;
|
|
}
|
|
|
|
|
|
/* Exported function documented in html/box.h */
|
|
void box_coords(struct box *box, int *x, int *y)
|
|
{
|
|
*x = box->x;
|
|
*y = box->y;
|
|
while (box->parent) {
|
|
if (box_is_float(box)) {
|
|
assert(box->float_container);
|
|
box = box->float_container;
|
|
} else {
|
|
box = box->parent;
|
|
}
|
|
*x += box->x - scrollbar_get_offset(box->scroll_x);
|
|
*y += box->y - scrollbar_get_offset(box->scroll_y);
|
|
}
|
|
}
|
|
|
|
|
|
/* Exported function documented in html/box.h */
|
|
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;
|
|
}
|
|
|
|
|
|
/* Exported function documented in html/box.h */
|
|
struct box *
|
|
box_at_point(const css_unit_ctx *unit_len_ctx,
|
|
struct box *box,
|
|
const int x, const int y,
|
|
int *box_x, int *box_y)
|
|
{
|
|
bool skip_children;
|
|
bool physically;
|
|
|
|
assert(box);
|
|
|
|
skip_children = false;
|
|
while ((box = box_next_xy(box, box_x, box_y, skip_children))) {
|
|
if (box_contains_point(unit_len_ctx, box, x - *box_x, y - *box_y,
|
|
&physically)) {
|
|
*box_x -= scrollbar_get_offset(box->scroll_x);
|
|
*box_y -= scrollbar_get_offset(box->scroll_y);
|
|
|
|
if (physically)
|
|
return box;
|
|
|
|
skip_children = false;
|
|
} else {
|
|
skip_children = true;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* Exported function documented in html/box.h */
|
|
struct box *box_find_by_id(struct box *box, lwc_string *id)
|
|
{
|
|
struct box *a, *b;
|
|
bool m;
|
|
|
|
if (box->id != NULL &&
|
|
lwc_string_isequal(id, box->id, &m) == lwc_error_ok &&
|
|
m == true) {
|
|
return box;
|
|
}
|
|
|
|
for (a = box->children; a; a = a->next) {
|
|
if ((b = box_find_by_id(a, id)) != NULL) {
|
|
return b;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* Exported function documented in html/box.h */
|
|
bool box_visible(struct box *box)
|
|
{
|
|
/* visibility: hidden */
|
|
if (box->style &&
|
|
css_computed_visibility(box->style) == CSS_VISIBILITY_HIDDEN) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* Exported function documented in html/box.h */
|
|
void box_dump(FILE *stream, struct box *box, unsigned int depth, bool style)
|
|
{
|
|
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') ",
|
|
nsurl_access(hlcache_handle_get_url(box->object)));
|
|
}
|
|
if (box->iframe) {
|
|
fprintf(stream, "(iframe) ");
|
|
}
|
|
if (box->gadget)
|
|
fprintf(stream, "(gadget) ");
|
|
if (style && box->style)
|
|
nscss_dump_computed_style(stream, box->style);
|
|
if (box->href)
|
|
fprintf(stream, " -> '%s'", nsurl_access(box->href));
|
|
if (box->target)
|
|
fprintf(stream, " |%s|", box->target);
|
|
if (box->title)
|
|
fprintf(stream, " [%s]", box->title);
|
|
if (box->id)
|
|
fprintf(stream, " ID:%s", lwc_string_data(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->float_container)
|
|
fprintf(stream, " float_container %p", box->float_container);
|
|
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, ")");
|
|
}
|
|
if (box->node != NULL) {
|
|
dom_string *name;
|
|
if (dom_node_get_node_name(box->node, &name) == DOM_NO_ERR) {
|
|
fprintf(stream, " <%s>", dom_string_data(name));
|
|
dom_string_unref(name);
|
|
}
|
|
}
|
|
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, style);
|
|
}
|
|
|
|
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, style);
|
|
}
|
|
}
|
|
|
|
|
|
/* exported interface documented in html/box.h */
|
|
bool box_vscrollbar_present(const struct box * const box)
|
|
{
|
|
return box->padding[TOP] +
|
|
box->height +
|
|
box->padding[BOTTOM] +
|
|
box->border[BOTTOM].width < box->descendant_y1;
|
|
}
|
|
|
|
|
|
/* exported interface documented in html/box.h */
|
|
bool box_hscrollbar_present(const struct box * const box)
|
|
{
|
|
return box->padding[LEFT] +
|
|
box->width +
|
|
box->padding[RIGHT] +
|
|
box->border[RIGHT].width < box->descendant_x1;
|
|
}
|
|
|
|
|
|
/* Exported function documented in html/box.h */
|
|
struct box *
|
|
box_pick_text_box(struct html_content *html,
|
|
int x, int y,
|
|
int dir,
|
|
int *dx, int *dy)
|
|
{
|
|
struct box *text_box = NULL;
|
|
struct box *box;
|
|
int nr_xd, nr_yd;
|
|
int bx, by;
|
|
int fx, fy;
|
|
int tx, ty;
|
|
|
|
if (html == NULL)
|
|
return NULL;
|
|
|
|
box = html->layout;
|
|
bx = box->margin[LEFT];
|
|
by = box->margin[TOP];
|
|
fx = bx;
|
|
fy = by;
|
|
|
|
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;
|
|
}
|