mirrors/netsurf
1
0
Fork 0
mirror of https://github.com/netsurf-browser/netsurf synced 2024-12-26 14:07:05 +03:00
Code Issues Packages Projects Releases Wiki Activity
4c4b57d511
netsurf/content/handlers/html/html_redraw.c
Michael Drake 4c4b57d511 HTML redraw: Never draw box scrollbars for textareas. 
The scrollbars for textareas are rendered by the widget.

This stops us from putting broken scrollbars over the top of the
textarea's own scrollbars.
2019-12-09 14:33:53 +00:00

1960 lines
54 KiB
C
Raw Blame History

/*
* Copyright 2004-2008 James Bursa <bursa@users.sourceforge.net>
* Copyright 2004-2007 John M Bell <jmb202@ecs.soton.ac.uk>
* Copyright 2004-2007 Richard Wilson <info@tinct.net>
* Copyright 2005-2006 Adrian Lees <adrianl@users.sourceforge.net>
* Copyright 2006 Rob Kendrick <rjek@netsurf-browser.org>
* Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
* Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* \file
*
* Redrawing CONTENT_HTML implementation.
*/
#include "utils/config.h"
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <dom/dom.h>
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"
#include "utils/nsoption.h"
#include "netsurf/content.h"
#include "netsurf/browser_window.h"
#include "netsurf/plotters.h"
#include "netsurf/bitmap.h"
#include "netsurf/layout.h"
#include "content/content_protected.h"
#include "css/utils.h"
#include "desktop/selection.h"
#include "desktop/print.h"
#include "desktop/scrollbar.h"
#include "desktop/textarea.h"
#include "desktop/gui_internal.h"
#include "html/box.h"
#include "html/font.h"
#include "html/form_internal.h"
#include "html/html_internal.h"
#include "html/layout.h"
#include "html/search.h"
bool html_redraw_debug = false;
/**
* Determine if a box has a background that needs drawing
*
* \param box Box to consider
* \return True if box has a background, false otherwise.
*/
static bool html_redraw_box_has_background(struct box *box)
{
if (box->background != NULL)
return true;
if (box->style != NULL) {
css_color colour;
css_computed_background_color(box->style, &colour);
if (nscss_color_is_transparent(colour) == false)
return true;
}
return false;
}
/**
* Find the background box for a box
*
* \param box Box to find background box for
* \return Pointer to background box, or NULL if there is none
*/
static struct box *html_redraw_find_bg_box(struct box *box)
{
/* Thanks to backwards compatibility, CSS defines the following:
*
* + If the box is for the root element and it has a background,
* use that (and then process the body box with no special case)
* + If the box is for the root element and it has no background,
* then use the background (if any) from the body element as if
* it were specified on the root. Then, when the box for the body
* element is processed, ignore the background.
* + For any other box, just use its own styling.
*/
if (box->parent == NULL) {
/* Root box */
if (html_redraw_box_has_background(box))
return box;
/* No background on root box: consider body box, if any */
if (box->children != NULL) {
if (html_redraw_box_has_background(box->children))
return box->children;
}
} else if (box->parent != NULL && box->parent->parent == NULL) {
/* Body box: only render background if root has its own */
if (html_redraw_box_has_background(box) &&
html_redraw_box_has_background(box->parent))
return box;
} else {
/* Any other box */
if (html_redraw_box_has_background(box))
return box;
}
return NULL;
}
/**
* Redraw a short text string, complete with highlighting
* (for selection/search)
*
* \param utf8_text pointer to UTF-8 text string
* \param utf8_len length of string, in bytes
* \param offset byte offset within textual representation
* \param space width of space that follows string (0 = no space)
* \param fstyle text style to use (pass text size unscaled)
* \param x x ordinate at which to plot text
* \param y y ordinate at which to plot text
* \param clip pointer to current clip rectangle
* \param height height of text string
* \param scale current display scale (1.0 = 100%)
* \param excluded exclude this text string from the selection
* \param c Content being redrawn.
* \param sel Selection context
* \param search Search context
* \param ctx current redraw context
* \return true iff successful and redraw should proceed
*/
static bool
text_redraw(const char *utf8_text,
size_t utf8_len,
size_t offset,
int space,
const plot_font_style_t *fstyle,
int x,
int y,
const struct rect *clip,
int height,
float scale,
bool excluded,
struct content *c,
const struct selection *sel,
struct search_context *search,
const struct redraw_context *ctx)
{
bool highlighted = false;
plot_font_style_t plot_fstyle = *fstyle;
nserror res;
/* Need scaled text size to pass to plotters */
plot_fstyle.size *= scale;
/* is this box part of a selection? */
if (!excluded && ctx->interactive == true) {
unsigned len = utf8_len + (space ? 1 : 0);
unsigned start_idx;
unsigned end_idx;
/* first try the browser window's current selection */
if (selection_defined(sel) && selection_highlighted(sel,
offset, offset + len,
&start_idx, &end_idx)) {
highlighted = true;
}
/* what about the current search operation, if any? */
if (!highlighted && (search != NULL) &&
search_term_highlighted(c,
offset, offset + len,
&start_idx, &end_idx,
search)) {
highlighted = true;
}
/* \todo make search terms visible within selected text */
if (highlighted) {
struct rect r;
unsigned endtxt_idx = end_idx;
bool clip_changed = false;
bool text_visible = true;
int startx, endx;
plot_style_t pstyle_fill_hback = *plot_style_fill_white;
plot_font_style_t fstyle_hback = plot_fstyle;
if (end_idx > utf8_len) {
/* adjust for trailing space, not present in
* utf8_text */
assert(end_idx == utf8_len + 1);
endtxt_idx = utf8_len;
}
res = guit->layout->width(fstyle,
utf8_text, start_idx,
&startx);
if (res != NSERROR_OK) {
startx = 0;
}
res = guit->layout->width(fstyle,
utf8_text, endtxt_idx,
&endx);
if (res != NSERROR_OK) {
endx = 0;
}
/* is there a trailing space that should be highlighted
* as well? */
if (end_idx > utf8_len) {
endx += space;
}
if (scale != 1.0) {
startx *= scale;
endx *= scale;
}
/* draw any text preceding highlighted portion */
if ((start_idx > 0) &&
(ctx->plot->text(ctx,
&plot_fstyle,
x,
y + (int)(height * 0.75 * scale),
utf8_text,
start_idx) != NSERROR_OK))
return false;
pstyle_fill_hback.fill_colour = fstyle->foreground;
/* highlighted portion */
r.x0 = x + startx;
r.y0 = y;
r.x1 = x + endx;
r.y1 = y + height * scale;
res = ctx->plot->rectangle(ctx, &pstyle_fill_hback, &r);
if (res != NSERROR_OK) {
return false;
}
if (start_idx > 0) {
int px0 = max(x + startx, clip->x0);
int px1 = min(x + endx, clip->x1);
if (px0 < px1) {
r.x0 = px0;
r.y0 = clip->y0;
r.x1 = px1;
r.y1 = clip->y1;
res = ctx->plot->clip(ctx, &r);
if (res != NSERROR_OK) {
return false;
}
clip_changed = true;
} else {
text_visible = false;
}
}
fstyle_hback.background =
pstyle_fill_hback.fill_colour;
fstyle_hback.foreground = colour_to_bw_furthest(
pstyle_fill_hback.fill_colour);
if (text_visible &&
(ctx->plot->text(ctx,
&fstyle_hback,
x,
y + (int)(height * 0.75 * scale),
utf8_text,
endtxt_idx) != NSERROR_OK)) {
return false;
}
/* draw any text succeeding highlighted portion */
if (endtxt_idx < utf8_len) {
int px0 = max(x + endx, clip->x0);
if (px0 < clip->x1) {
r.x0 = px0;
r.y0 = clip->y0;
r.x1 = clip->x1;
r.y1 = clip->y1;
res = ctx->plot->clip(ctx, &r);
if (res != NSERROR_OK) {
return false;
}
clip_changed = true;
res = ctx->plot->text(ctx,
&plot_fstyle,
x,
y + (int)(height * 0.75 * scale),
utf8_text,
utf8_len);
if (res != NSERROR_OK) {
return false;
}
}
}
if (clip_changed &&
(ctx->plot->clip(ctx, clip) != NSERROR_OK)) {
return false;
}
}
}
if (!highlighted) {
res = ctx->plot->text(ctx,
&plot_fstyle,
x,
y + (int) (height * 0.75 * scale),
utf8_text,
utf8_len);
if (res != NSERROR_OK) {
return false;
}
}
return true;
}
/**
* Plot a checkbox.
*
* \param x left coordinate
* \param y top coordinate
* \param width dimensions of checkbox
* \param height dimensions of checkbox
* \param selected the checkbox is selected
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool html_redraw_checkbox(int x, int y, int width, int height,
bool selected, const struct redraw_context *ctx)
{
double z;
nserror res;
struct rect rect;
z = width * 0.15;
if (z == 0) {
z = 1;
}
rect.x0 = x;
rect.y0 = y ;
rect.x1 = x + width;
rect.y1 = y + height;
res = ctx->plot->rectangle(ctx, plot_style_fill_wbasec, &rect);
if (res != NSERROR_OK) {
return false;
}
/* dark line across top */
rect.y1 = y;
res = ctx->plot->line(ctx, plot_style_stroke_darkwbasec, &rect);
if (res != NSERROR_OK) {
return false;
}
/* dark line across left */
rect.x1 = x;
rect.y1 = y + height;
res = ctx->plot->line(ctx, plot_style_stroke_darkwbasec, &rect);
if (res != NSERROR_OK) {
return false;
}
/* light line across right */
rect.x0 = x + width;
rect.x1 = x + width;
res = ctx->plot->line(ctx, plot_style_stroke_lightwbasec, &rect);
if (res != NSERROR_OK) {
return false;
}
/* light line across bottom */
rect.x0 = x;
rect.y0 = y + height;
res = ctx->plot->line(ctx, plot_style_stroke_lightwbasec, &rect);
if (res != NSERROR_OK) {
return false;
}
if (selected) {
if (width < 12 || height < 12) {
/* render a solid box instead of a tick */
rect.x0 = x + z + z;
rect.y0 = y + z + z;
rect.x1 = x + width - z;
rect.y1 = y + height - z;
res = ctx->plot->rectangle(ctx, plot_style_fill_wblobc, &rect);
if (res != NSERROR_OK) {
return false;
}
} else {
/* render a tick, as it'll fit comfortably */
rect.x0 = x + width - z;
rect.y0 = y + z;
rect.x1 = x + (z * 3);
rect.y1 = y + height - z;
res = ctx->plot->line(ctx, plot_style_stroke_wblobc, &rect);
if (res != NSERROR_OK) {
return false;
}
rect.x0 = x + (z * 3);
rect.y0 = y + height - z;
rect.x1 = x + z + z;
rect.y1 = y + (height / 2);
res = ctx->plot->line(ctx, plot_style_stroke_wblobc, &rect);
if (res != NSERROR_OK) {
return false;
}
}
}
return true;
}
/**
* Plot a radio icon.
*
* \param x left coordinate
* \param y top coordinate
* \param width dimensions of radio icon
* \param height dimensions of radio icon
* \param selected the radio icon is selected
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool html_redraw_radio(int x, int y, int width, int height,
bool selected, const struct redraw_context *ctx)
{
nserror res;
/* plot background of radio button */
res = ctx->plot->disc(ctx,
plot_style_fill_wbasec,
x + width * 0.5,
y + height * 0.5,
width * 0.5 - 1);
if (res != NSERROR_OK) {
return false;
}
/* plot dark arc */
res = ctx->plot->arc(ctx,
plot_style_fill_darkwbasec,
x + width * 0.5,
y + height * 0.5,
width * 0.5 - 1,
45,
225);
if (res != NSERROR_OK) {
return false;
}
/* plot light arc */
res = ctx->plot->arc(ctx,
plot_style_fill_lightwbasec,
x + width * 0.5,
y + height * 0.5,
width * 0.5 - 1,
225,
45);
if (res != NSERROR_OK) {
return false;
}
if (selected) {
/* plot selection blob */
res = ctx->plot->disc(ctx,
plot_style_fill_wblobc,
x + width * 0.5,
y + height * 0.5,
width * 0.3 - 1);
if (res != NSERROR_OK) {
return false;
}
}
return true;
}
/**
* Plot a file upload input.
*
* \param x left coordinate
* \param y top coordinate
* \param width dimensions of input
* \param height dimensions of input
* \param box box of input
* \param scale scale for redraw
* \param background_colour current background colour
* \param len_ctx Length conversion context
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool html_redraw_file(int x, int y, int width, int height,
struct box *box, float scale, colour background_colour,
const nscss_len_ctx *len_ctx,
const struct redraw_context *ctx)
{
int text_width;
const char *text;
size_t length;
plot_font_style_t fstyle;
nserror res;
font_plot_style_from_css(len_ctx, box->style, &fstyle);
fstyle.background = background_colour;
if (box->gadget->value) {
text = box->gadget->value;
} else {
text = messages_get("Form_Drop");
}
length = strlen(text);
res = guit->layout->width(&fstyle, text, length, &text_width);
if (res != NSERROR_OK) {
return false;
}
text_width *= scale;
if (width < text_width + 8) {
x = x + width - text_width - 4;
} else {
x = x + 4;
}
res = ctx->plot->text(ctx, &fstyle, x, y + height * 0.75, text, length);
if (res != NSERROR_OK) {
return false;
}
return true;
}
/**
* Plot background images.
*
* The reason for the presence of \a background is the backwards compatibility
* mess that is backgrounds on &lt;body&gt;. The background will be drawn relative
* to \a box, using the background information contained within \a background.
*
* \param x coordinate of box
* \param y coordinate of box
* \param box box to draw background image of
* \param scale scale for redraw
* \param clip current clip rectangle
* \param background_colour current background colour
* \param background box containing background details (usually \a box)
* \param len_ctx Length conversion context
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool html_redraw_background(int x, int y, struct box *box, float scale,
const struct rect *clip, colour *background_colour,
struct box *background,
const nscss_len_ctx *len_ctx,
const struct redraw_context *ctx)
{
bool repeat_x = false;
bool repeat_y = false;
bool plot_colour = true;
bool plot_content;
bool clip_to_children = false;
struct box *clip_box = box;
int ox = x, oy = y;
int width, height;
css_fixed hpos = 0, vpos = 0;
css_unit hunit = CSS_UNIT_PX, vunit = CSS_UNIT_PX;
struct box *parent;
struct rect r = *clip;
css_color bgcol;
plot_style_t pstyle_fill_bg = {
.fill_type = PLOT_OP_TYPE_SOLID,
.fill_colour = *background_colour,
};
nserror res;
if (ctx->background_images == false)
return true;
plot_content = (background->background != NULL);
if (plot_content) {
if (!box->parent) {
/* Root element, special case:
* background origin calc. is based on margin box */
x -= box->margin[LEFT] * scale;
y -= box->margin[TOP] * scale;
width = box->margin[LEFT] + box->padding[LEFT] +
box->width + box->padding[RIGHT] +
box->margin[RIGHT];
height = box->margin[TOP] + box->padding[TOP] +
box->height + box->padding[BOTTOM] +
box->margin[BOTTOM];
} else {
width = box->padding[LEFT] + box->width +
box->padding[RIGHT];
height = box->padding[TOP] + box->height +
box->padding[BOTTOM];
}
/* handle background-repeat */
switch (css_computed_background_repeat(background->style)) {
case CSS_BACKGROUND_REPEAT_REPEAT:
repeat_x = repeat_y = true;
/* optimisation: only plot the colour if
* bitmap is not opaque */
plot_colour = !content_get_opaque(background->background);
break;
case CSS_BACKGROUND_REPEAT_REPEAT_X:
repeat_x = true;
break;
case CSS_BACKGROUND_REPEAT_REPEAT_Y:
repeat_y = true;
break;
case CSS_BACKGROUND_REPEAT_NO_REPEAT:
break;
default:
break;
}
/* handle background-position */
css_computed_background_position(background->style,
&hpos, &hunit, &vpos, &vunit);
if (hunit == CSS_UNIT_PCT) {
x += (width -
content_get_width(background->background)) *
scale * FIXTOFLT(hpos) / 100.;
} else {
x += (int) (FIXTOFLT(nscss_len2px(len_ctx, hpos, hunit,
background->style)) * scale);
}
if (vunit == CSS_UNIT_PCT) {
y += (height -
content_get_height(background->background)) *
scale * FIXTOFLT(vpos) / 100.;
} else {
y += (int) (FIXTOFLT(nscss_len2px(len_ctx, vpos, vunit,
background->style)) * scale);
}
}
/* special case for table rows as their background needs
* to be clipped to all the cells */
if (box->type == BOX_TABLE_ROW) {
css_fixed h = 0, v = 0;
css_unit hu = CSS_UNIT_PX, vu = CSS_UNIT_PX;
for (parent = box->parent;
((parent) && (parent->type != BOX_TABLE));
parent = parent->parent);
assert(parent && (parent->style));
css_computed_border_spacing(parent->style, &h, &hu, &v, &vu);
clip_to_children = (h > 0) || (v > 0);
if (clip_to_children)
clip_box = box->children;
}
for (; clip_box; clip_box = clip_box->next) {
/* clip to child boxes if needed */
if (clip_to_children) {
assert(clip_box->type == BOX_TABLE_CELL);
/* update clip.* to the child cell */
r.x0 = ox + (clip_box->x * scale);
r.y0 = oy + (clip_box->y * scale);
r.x1 = r.x0 + (clip_box->padding[LEFT] +
clip_box->width +
clip_box->padding[RIGHT]) * scale;
r.y1 = r.y0 + (clip_box->padding[TOP] +
clip_box->height +
clip_box->padding[BOTTOM]) * scale;
if (r.x0 < clip->x0) r.x0 = clip->x0;
if (r.y0 < clip->y0) r.y0 = clip->y0;
if (r.x1 > clip->x1) r.x1 = clip->x1;
if (r.y1 > clip->y1) r.y1 = clip->y1;
css_computed_background_color(clip_box->style, &bgcol);
/* <td> attributes override <tr> */
/* if the background content is opaque there
* is no need to plot underneath it.
*/
if ((r.x0 >= r.x1) ||
(r.y0 >= r.y1) ||
(nscss_color_is_transparent(bgcol) == false) ||
((clip_box->background != NULL) &&
content_get_opaque(clip_box->background)))
continue;
}
/* plot the background colour */
css_computed_background_color(background->style, &bgcol);
if (nscss_color_is_transparent(bgcol) == false) {
*background_colour = nscss_color_to_ns(bgcol);
pstyle_fill_bg.fill_colour = *background_colour;
if (plot_colour) {
res = ctx->plot->rectangle(ctx, &pstyle_fill_bg, &r);
if (res != NSERROR_OK) {
return false;
}
}
}
/* and plot the image */
if (plot_content) {
width = content_get_width(background->background);
height = content_get_height(background->background);
/* ensure clip area only as large as required */
if (!repeat_x) {
if (r.x0 < x)
r.x0 = x;
if (r.x1 > x + width * scale)
r.x1 = x + width * scale;
}
if (!repeat_y) {
if (r.y0 < y)
r.y0 = y;
if (r.y1 > y + height * scale)
r.y1 = y + height * scale;
}
/* valid clipping rectangles only */
if ((r.x0 < r.x1) && (r.y0 < r.y1)) {
struct content_redraw_data bg_data;
res = ctx->plot->clip(ctx, &r);
if (res != NSERROR_OK) {
return false;
}
bg_data.x = x;
bg_data.y = y;
bg_data.width = ceilf(width * scale);
bg_data.height = ceilf(height * scale);
bg_data.background_colour = *background_colour;
bg_data.scale = scale;
bg_data.repeat_x = repeat_x;
bg_data.repeat_y = repeat_y;
/* We just continue if redraw fails */
content_redraw(background->background,
&bg_data, &r, ctx);
}
}
/* only <tr> rows being clipped to child boxes loop */
if (!clip_to_children)
return true;
}
return true;
}
/**
* Plot an inline's background and/or background image.
*
* \param x coordinate of box
* \param y coordinate of box
* \param box BOX_INLINE which created the background
* \param scale scale for redraw
* \param clip coordinates of clip rectangle
* \param b coordinates of border edge rectangle
* \param first true if this is the first rectangle associated with the inline
* \param last true if this is the last rectangle associated with the inline
* \param background_colour updated to current background colour if plotted
* \param len_ctx Length conversion context
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool html_redraw_inline_background(int x, int y, struct box *box,
float scale, const struct rect *clip, struct rect b,
bool first, bool last, colour *background_colour,
const nscss_len_ctx *len_ctx,
const struct redraw_context *ctx)
{
struct rect r = *clip;
bool repeat_x = false;
bool repeat_y = false;
bool plot_colour = true;
bool plot_content;
css_fixed hpos = 0, vpos = 0;
css_unit hunit = CSS_UNIT_PX, vunit = CSS_UNIT_PX;
css_color bgcol;
plot_style_t pstyle_fill_bg = {
.fill_type = PLOT_OP_TYPE_SOLID,
.fill_colour = *background_colour,
};
nserror res;
plot_content = (box->background != NULL);
if (html_redraw_printing && nsoption_bool(remove_backgrounds))
return true;
if (plot_content) {
/* handle background-repeat */
switch (css_computed_background_repeat(box->style)) {
case CSS_BACKGROUND_REPEAT_REPEAT:
repeat_x = repeat_y = true;
/* optimisation: only plot the colour if
* bitmap is not opaque
*/
plot_colour = !content_get_opaque(box->background);
break;
case CSS_BACKGROUND_REPEAT_REPEAT_X:
repeat_x = true;
break;
case CSS_BACKGROUND_REPEAT_REPEAT_Y:
repeat_y = true;
break;
case CSS_BACKGROUND_REPEAT_NO_REPEAT:
break;
default:
break;
}
/* handle background-position */
css_computed_background_position(box->style,
&hpos, &hunit, &vpos, &vunit);
if (hunit == CSS_UNIT_PCT) {
x += (b.x1 - b.x0 -
content_get_width(box->background) *
scale) * FIXTOFLT(hpos) / 100.;
if (!repeat_x && ((hpos < 2 && !first) ||
(hpos > 98 && !last))){
plot_content = false;
}
} else {
x += (int) (FIXTOFLT(nscss_len2px(len_ctx, hpos, hunit,
box->style)) * scale);
}
if (vunit == CSS_UNIT_PCT) {
y += (b.y1 - b.y0 -
content_get_height(box->background) *
scale) * FIXTOFLT(vpos) / 100.;
} else {
y += (int) (FIXTOFLT(nscss_len2px(len_ctx, vpos, vunit,
box->style)) * scale);
}
}
/* plot the background colour */
css_computed_background_color(box->style, &bgcol);
if (nscss_color_is_transparent(bgcol) == false) {
*background_colour = nscss_color_to_ns(bgcol);
pstyle_fill_bg.fill_colour = *background_colour;
if (plot_colour) {
res = ctx->plot->rectangle(ctx, &pstyle_fill_bg, &r);
if (res != NSERROR_OK) {
return false;
}
}
}
/* and plot the image */
if (plot_content) {
int width = content_get_width(box->background);
int height = content_get_height(box->background);
if (!repeat_x) {
if (r.x0 < x)
r.x0 = x;
if (r.x1 > x + width * scale)
r.x1 = x + width * scale;
}
if (!repeat_y) {
if (r.y0 < y)
r.y0 = y;
if (r.y1 > y + height * scale)
r.y1 = y + height * scale;
}
/* valid clipping rectangles only */
if ((r.x0 < r.x1) && (r.y0 < r.y1)) {
struct content_redraw_data bg_data;
res = ctx->plot->clip(ctx, &r);
if (res != NSERROR_OK) {
return false;
}
bg_data.x = x;
bg_data.y = y;
bg_data.width = ceilf(width * scale);
bg_data.height = ceilf(height * scale);
bg_data.background_colour = *background_colour;
bg_data.scale = scale;
bg_data.repeat_x = repeat_x;
bg_data.repeat_y = repeat_y;
/* We just continue if redraw fails */
content_redraw(box->background, &bg_data, &r, ctx);
}
}
return true;
}
/**
* Plot text decoration for an inline box.
*
* \param box box to plot decorations for, of type BOX_INLINE
* \param x x coordinate of parent of box
* \param y y coordinate of parent of box
* \param scale scale for redraw
* \param colour colour for decorations
* \param ratio position of line as a ratio of line height
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool
html_redraw_text_decoration_inline(struct box *box,
int x, int y,
float scale,
colour colour,
float ratio,
const struct redraw_context *ctx)
{
struct box *c;
plot_style_t plot_style_box = {
.stroke_type = PLOT_OP_TYPE_SOLID,
.stroke_colour = colour,
};
nserror res;
struct rect rect;
for (c = box->next;
c && c != box->inline_end;
c = c->next) {
if (c->type != BOX_TEXT) {
continue;
}
rect.x0 = (x + c->x) * scale;
rect.y0 = (y + c->y + c->height * ratio) * scale;
rect.x1 = (x + c->x + c->width) * scale;
rect.y1 = (y + c->y + c->height * ratio) * scale;
res = ctx->plot->line(ctx, &plot_style_box, &rect);
if (res != NSERROR_OK) {
return false;
}
}
return true;
}
/**
* Plot text decoration for an non-inline box.
*
* \param box box to plot decorations for, of type other than BOX_INLINE
* \param x x coordinate of box
* \param y y coordinate of box
* \param scale scale for redraw
* \param colour colour for decorations
* \param ratio position of line as a ratio of line height
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool
html_redraw_text_decoration_block(struct box *box,
int x, int y,
float scale,
colour colour,
float ratio,
const struct redraw_context *ctx)
{
struct box *c;
plot_style_t plot_style_box = {
.stroke_type = PLOT_OP_TYPE_SOLID,
.stroke_colour = colour,
};
nserror res;
struct rect rect;
/* draw through text descendants */
for (c = box->children; c; c = c->next) {
if (c->type == BOX_TEXT) {
rect.x0 = (x + c->x) * scale;
rect.y0 = (y + c->y + c->height * ratio) * scale;
rect.x1 = (x + c->x + c->width) * scale;
rect.y1 = (y + c->y + c->height * ratio) * scale;
res = ctx->plot->line(ctx, &plot_style_box, &rect);
if (res != NSERROR_OK) {
return false;
}
} else if ((c->type == BOX_INLINE_CONTAINER) || (c->type == BOX_BLOCK)) {
if (!html_redraw_text_decoration_block(c,
x + c->x, y + c->y,
scale, colour, ratio, ctx))
return false;
}
}
return true;
}
/**
* Plot text decoration for a box.
*
* \param box box to plot decorations for
* \param x_parent x coordinate of parent of box
* \param y_parent y coordinate of parent of box
* \param scale scale for redraw
* \param background_colour current background colour
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool html_redraw_text_decoration(struct box *box,
int x_parent, int y_parent, float scale,
colour background_colour, const struct redraw_context *ctx)
{
static const enum css_text_decoration_e decoration[] = {
CSS_TEXT_DECORATION_UNDERLINE, CSS_TEXT_DECORATION_OVERLINE,
CSS_TEXT_DECORATION_LINE_THROUGH };
static const float line_ratio[] = { 0.9, 0.1, 0.5 };
colour fgcol;
unsigned int i;
css_color col;
css_computed_color(box->style, &col);
fgcol = nscss_color_to_ns(col);
/* antialias colour for under/overline */
if (html_redraw_printing == false)
fgcol = blend_colour(background_colour, fgcol);
if (box->type == BOX_INLINE) {
if (!box->inline_end)
return true;
for (i = 0; i != NOF_ELEMENTS(decoration); i++)
if (css_computed_text_decoration(box->style) &
decoration[i])
if (!html_redraw_text_decoration_inline(box,
x_parent, y_parent, scale,
fgcol, line_ratio[i], ctx))
return false;
} else {
for (i = 0; i != NOF_ELEMENTS(decoration); i++)
if (css_computed_text_decoration(box->style) &
decoration[i])
if (!html_redraw_text_decoration_block(box,
x_parent + box->x,
y_parent + box->y,
scale,
fgcol, line_ratio[i], ctx))
return false;
}
return true;
}
/**
* Redraw the text content of a box, possibly partially highlighted
* because the text has been selected, or matches a search operation.
*
* \param html The html content to redraw text within.
* \param box box with text content
* \param x x co-ord of box
* \param y y co-ord of box
* \param clip current clip rectangle
* \param scale current scale setting (1.0 = 100%)
* \param current_background_color
* \param ctx current redraw context
* \return true iff successful and redraw should proceed
*/
static bool html_redraw_text_box(const html_content *html, struct box *box,
int x, int y, const struct rect *clip, float scale,
colour current_background_color,
const struct redraw_context *ctx)
{
bool excluded = (box->object != NULL);
plot_font_style_t fstyle;
font_plot_style_from_css(&html->len_ctx, box->style, &fstyle);
fstyle.background = current_background_color;
if (!text_redraw(box->text, box->length, box->byte_offset,
box->space, &fstyle, x, y,
clip, box->height, scale, excluded,
(struct content *)html, &html->sel,
html->search, ctx))
return false;
return true;
}
bool html_redraw_box(const html_content *html, struct box *box,
int x_parent, int y_parent,
const struct rect *clip, float scale,
colour current_background_color,
const struct redraw_context *ctx);
/**
* Draw the various children of a box.
*
* \param html html content
* \param box box to draw children of
* \param x_parent coordinate of parent box
* \param y_parent coordinate of parent box
* \param clip clip rectangle
* \param scale scale for redraw
* \param current_background_color background colour under this box
* \param ctx current redraw context
* \return true if successful, false otherwise
*/
static bool html_redraw_box_children(const html_content *html, struct box *box,
int x_parent, int y_parent,
const struct rect *clip, float scale,
colour current_background_color,
const struct redraw_context *ctx)
{
struct box *c;
for (c = box->children; c; c = c->next) {
if (c->type != BOX_FLOAT_LEFT && c->type != BOX_FLOAT_RIGHT)
if (!html_redraw_box(html, c,
x_parent + box->x -
scrollbar_get_offset(box->scroll_x),
y_parent + box->y -
scrollbar_get_offset(box->scroll_y),
clip, scale, current_background_color,
ctx))
return false;
}
for (c = box->float_children; c; c = c->next_float)
if (!html_redraw_box(html, c,
x_parent + box->x -
scrollbar_get_offset(box->scroll_x),
y_parent + box->y -
scrollbar_get_offset(box->scroll_y),
clip, scale, current_background_color,
ctx))
return false;
return true;
}
/**
* Recursively draw a box.
*
* \param html html content
* \param box box to draw
* \param x_parent coordinate of parent box
* \param y_parent coordinate of parent box
* \param clip clip rectangle
* \param scale scale for redraw
* \param current_background_color background colour under this box
* \param ctx current redraw context
* \return true if successful, false otherwise
*
* x, y, clip_[xy][01] are in target coordinates.
*/
bool html_redraw_box(const html_content *html, struct box *box,
int x_parent, int y_parent,
const struct rect *clip, const float scale,
colour current_background_color,
const struct redraw_context *ctx)
{
const struct plotter_table *plot = ctx->plot;
int x, y;
int width, height;
int padding_left, padding_top, padding_width, padding_height;
int border_left, border_top, border_right, border_bottom;
struct rect r;
struct rect rect;
int x_scrolled, y_scrolled;
struct box *bg_box = NULL;
css_computed_clip_rect css_rect;
enum css_overflow_e overflow_x = CSS_OVERFLOW_VISIBLE;
enum css_overflow_e overflow_y = CSS_OVERFLOW_VISIBLE;
if (html_redraw_printing && (box->flags & PRINTED))
return true;
if (box->style != NULL) {
overflow_x = css_computed_overflow_x(box->style);
overflow_y = css_computed_overflow_y(box->style);
}
/* avoid trivial FP maths */
if (scale == 1.0) {
x = x_parent + box->x;
y = y_parent + box->y;
width = box->width;
height = box->height;
padding_left = box->padding[LEFT];
padding_top = box->padding[TOP];
padding_width = padding_left + box->width + box->padding[RIGHT];
padding_height = padding_top + box->height +
box->padding[BOTTOM];
border_left = box->border[LEFT].width;
border_top = box->border[TOP].width;
border_right = box->border[RIGHT].width;
border_bottom = box->border[BOTTOM].width;
} else {
x = (x_parent + box->x) * scale;
y = (y_parent + box->y) * scale;
width = box->width * scale;
height = box->height * scale;
/* left and top padding values are normally zero,
* so avoid trivial FP maths */
padding_left = box->padding[LEFT] ? box->padding[LEFT] * scale
: 0;
padding_top = box->padding[TOP] ? box->padding[TOP] * scale
: 0;
padding_width = (box->padding[LEFT] + box->width +
box->padding[RIGHT]) * scale;
padding_height = (box->padding[TOP] + box->height +
box->padding[BOTTOM]) * scale;
border_left = box->border[LEFT].width * scale;
border_top = box->border[TOP].width * scale;
border_right = box->border[RIGHT].width * scale;
border_bottom = box->border[BOTTOM].width * scale;
}
/* calculate rectangle covering this box and descendants */
if (box->style && overflow_x != CSS_OVERFLOW_VISIBLE &&
box->parent != NULL) {
/* box contents clipped to box size */
r.x0 = x - border_left;
r.x1 = x + padding_width + border_right;
} else {
/* box contents can hang out of the box; use descendant box */
if (scale == 1.0) {
r.x0 = x + box->descendant_x0;
r.x1 = x + box->descendant_x1 + 1;
} else {
r.x0 = x + box->descendant_x0 * scale;
r.x1 = x + box->descendant_x1 * scale + 1;
}
if (!box->parent) {
/* root element */
int margin_left, margin_right;
if (scale == 1.0) {
margin_left = box->margin[LEFT];
margin_right = box->margin[RIGHT];
} else {
margin_left = box->margin[LEFT] * scale;
margin_right = box->margin[RIGHT] * scale;
}
r.x0 = x - border_left - margin_left < r.x0 ?
x - border_left - margin_left : r.x0;
r.x1 = x + padding_width + border_right +
margin_right > r.x1 ?
x + padding_width + border_right +
margin_right : r.x1;
}
}
/* calculate rectangle covering this box and descendants */
if (box->style && overflow_y != CSS_OVERFLOW_VISIBLE &&
box->parent != NULL) {
/* box contents clipped to box size */
r.y0 = y - border_top;
r.y1 = y + padding_height + border_bottom;
} else {
/* box contents can hang out of the box; use descendant box */
if (scale == 1.0) {
r.y0 = y + box->descendant_y0;
r.y1 = y + box->descendant_y1 + 1;
} else {
r.y0 = y + box->descendant_y0 * scale;
r.y1 = y + box->descendant_y1 * scale + 1;
}
if (!box->parent) {
/* root element */
int margin_top, margin_bottom;
if (scale == 1.0) {
margin_top = box->margin[TOP];
margin_bottom = box->margin[BOTTOM];
} else {
margin_top = box->margin[TOP] * scale;
margin_bottom = box->margin[BOTTOM] * scale;
}
r.y0 = y - border_top - margin_top < r.y0 ?
y - border_top - margin_top : r.y0;
r.y1 = y + padding_height + border_bottom +
margin_bottom > r.y1 ?
y + padding_height + border_bottom +
margin_bottom : r.y1;
}
}
/* return if the rectangle is completely outside the clip rectangle */
if (clip->y1 < r.y0 || r.y1 < clip->y0 ||
clip->x1 < r.x0 || r.x1 < clip->x0)
return true;
/*if the rectangle is under the page bottom but it can fit in a page,
don't print it now*/
if (html_redraw_printing) {
if (r.y1 > html_redraw_printing_border) {
if (r.y1 - r.y0 <= html_redraw_printing_border &&
(box->type == BOX_TEXT ||
box->type == BOX_TABLE_CELL
|| box->object || box->gadget)) {
/*remember the highest of all points from the
not printed elements*/
if (r.y0 < html_redraw_printing_top_cropped)
html_redraw_printing_top_cropped = r.y0;
return true;
}
}
else box->flags |= PRINTED; /*it won't be printed anymore*/
}
/* if visibility is hidden render children only */
if (box->style && css_computed_visibility(box->style) ==
CSS_VISIBILITY_HIDDEN) {
if ((ctx->plot->group_start) &&
(ctx->plot->group_start(ctx, "hidden box") != NSERROR_OK))
return false;
if (!html_redraw_box_children(html, box, x_parent, y_parent,
&r, scale, current_background_color, ctx))
return false;
return ((!ctx->plot->group_end) || (ctx->plot->group_end(ctx) == NSERROR_OK));
}
if ((ctx->plot->group_start) &&
(ctx->plot->group_start(ctx,"vis box") != NSERROR_OK)) {
return false;
}
if (box->style != NULL &&
css_computed_position(box->style) ==
CSS_POSITION_ABSOLUTE &&
css_computed_clip(box->style, &css_rect) ==
CSS_CLIP_RECT) {
/* We have an absolutly positioned box with a clip rect */
if (css_rect.left_auto == false)
r.x0 = x - border_left + FIXTOINT(nscss_len2px(
&html->len_ctx,
css_rect.left, css_rect.lunit,
box->style));
if (css_rect.top_auto == false)
r.y0 = y - border_top + FIXTOINT(nscss_len2px(
&html->len_ctx,
css_rect.top, css_rect.tunit,
box->style));
if (css_rect.right_auto == false)
r.x1 = x - border_left + FIXTOINT(nscss_len2px(
&html->len_ctx,
css_rect.right, css_rect.runit,
box->style));
if (css_rect.bottom_auto == false)
r.y1 = y - border_top + FIXTOINT(nscss_len2px(
&html->len_ctx,
css_rect.bottom, css_rect.bunit,
box->style));
/* find intersection of clip rectangle and box */
if (r.x0 < clip->x0) r.x0 = clip->x0;
if (r.y0 < clip->y0) r.y0 = clip->y0;
if (clip->x1 < r.x1) r.x1 = clip->x1;
if (clip->y1 < r.y1) r.y1 = clip->y1;
/* Nothing to do for invalid rectangles */
if (r.x0 >= r.x1 || r.y0 >= r.y1)
/* not an error */
return ((!ctx->plot->group_end) ||
(ctx->plot->group_end(ctx) == NSERROR_OK));
/* clip to it */
if (ctx->plot->clip(ctx, &r) != NSERROR_OK)
return false;
} else if (box->type == BOX_BLOCK || box->type == BOX_INLINE_BLOCK ||
box->type == BOX_TABLE_CELL || box->object) {
/* find intersection of clip rectangle and box */
if (r.x0 < clip->x0) r.x0 = clip->x0;
if (r.y0 < clip->y0) r.y0 = clip->y0;
if (clip->x1 < r.x1) r.x1 = clip->x1;
if (clip->y1 < r.y1) r.y1 = clip->y1;
/* no point trying to draw 0-width/height boxes */
if (r.x0 == r.x1 || r.y0 == r.y1)
/* not an error */
return ((!ctx->plot->group_end) ||
(ctx->plot->group_end(ctx) == NSERROR_OK));
/* clip to it */
if (ctx->plot->clip(ctx, &r) != NSERROR_OK)
return false;
} else {
/* clip box is fine, clip to it */
r = *clip;
if (ctx->plot->clip(ctx, &r) != NSERROR_OK)
return false;
}
/* background colour and image for block level content and replaced
* inlines */
bg_box = html_redraw_find_bg_box(box);
/* bg_box == NULL implies that this box should not have
* its background rendered. Otherwise filter out linebreaks,
* optimize away non-differing inlines, only plot background
* for BOX_TEXT it's in an inline */
if (bg_box && bg_box->type != BOX_BR &&
bg_box->type != BOX_TEXT &&
bg_box->type != BOX_INLINE_END &&
(bg_box->type != BOX_INLINE || bg_box->object ||
bg_box->flags & IFRAME || box->flags & REPLACE_DIM ||
(bg_box->gadget != NULL &&
(bg_box->gadget->type == GADGET_TEXTAREA ||
bg_box->gadget->type == GADGET_TEXTBOX ||
bg_box->gadget->type == GADGET_PASSWORD)))) {
/* find intersection of clip box and border edge */
struct rect p;
p.x0 = x - border_left < r.x0 ? r.x0 : x - border_left;
p.y0 = y - border_top < r.y0 ? r.y0 : y - border_top;
p.x1 = x + padding_width + border_right < r.x1 ?
x + padding_width + border_right : r.x1;
p.y1 = y + padding_height + border_bottom < r.y1 ?
y + padding_height + border_bottom : r.y1;
if (!box->parent) {
/* Root element, special case:
* background covers margins too */
int m_left, m_top, m_right, m_bottom;
if (scale == 1.0) {
m_left = box->margin[LEFT];
m_top = box->margin[TOP];
m_right = box->margin[RIGHT];
m_bottom = box->margin[BOTTOM];
} else {
m_left = box->margin[LEFT] * scale;
m_top = box->margin[TOP] * scale;
m_right = box->margin[RIGHT] * scale;
m_bottom = box->margin[BOTTOM] * scale;
}
p.x0 = p.x0 - m_left < r.x0 ? r.x0 : p.x0 - m_left;
p.y0 = p.y0 - m_top < r.y0 ? r.y0 : p.y0 - m_top;
p.x1 = p.x1 + m_right < r.x1 ? p.x1 + m_right : r.x1;
p.y1 = p.y1 + m_bottom < r.y1 ? p.y1 + m_bottom : r.y1;
}
/* valid clipping rectangles only */
if ((p.x0 < p.x1) && (p.y0 < p.y1)) {
/* plot background */
if (!html_redraw_background(x, y, box, scale, &p,
&current_background_color, bg_box,
&html->len_ctx, ctx))
return false;
/* restore previous graphics window */
if (ctx->plot->clip(ctx, &r) != NSERROR_OK)
return false;
}
}
/* borders for block level content and replaced inlines */
if (box->style &&
box->type != BOX_TEXT &&
box->type != BOX_INLINE_END &&
(box->type != BOX_INLINE || box->object ||
box->flags & IFRAME || box->flags & REPLACE_DIM ||
(box->gadget != NULL &&
(box->gadget->type == GADGET_TEXTAREA ||
box->gadget->type == GADGET_TEXTBOX ||
box->gadget->type == GADGET_PASSWORD))) &&
(border_top || border_right || border_bottom || border_left)) {
if (!html_redraw_borders(box, x_parent, y_parent,
padding_width, padding_height, &r,
scale, ctx))
return false;
}
/* backgrounds and borders for non-replaced inlines */
if (box->style && box->type == BOX_INLINE && box->inline_end &&
(html_redraw_box_has_background(box) ||
border_top || border_right ||
border_bottom || border_left)) {
/* inline backgrounds and borders span other boxes and may
* wrap onto separate lines */
struct box *ib;
struct rect b; /* border edge rectangle */
struct rect p; /* clipped rect */
bool first = true;
int ib_x;
int ib_y = y;
int ib_p_width;
int ib_b_left, ib_b_right;
b.x0 = x - border_left;
b.x1 = x + padding_width + border_right;
b.y0 = y - border_top;
b.y1 = y + padding_height + border_bottom;
p.x0 = b.x0 < r.x0 ? r.x0 : b.x0;
p.x1 = b.x1 < r.x1 ? b.x1 : r.x1;
p.y0 = b.y0 < r.y0 ? r.y0 : b.y0;
p.y1 = b.y1 < r.y1 ? b.y1 : r.y1;
for (ib = box; ib; ib = ib->next) {
/* to get extents of rectangle(s) associated with
* inline, cycle though all boxes in inline, skipping
* over floats */
if (ib->type == BOX_FLOAT_LEFT ||
ib->type == BOX_FLOAT_RIGHT)
continue;
if (scale == 1.0) {
ib_x = x_parent + ib->x;
ib_y = y_parent + ib->y;
ib_p_width = ib->padding[LEFT] + ib->width +
ib->padding[RIGHT];
ib_b_left = ib->border[LEFT].width;
ib_b_right = ib->border[RIGHT].width;
} else {
ib_x = (x_parent + ib->x) * scale;
ib_y = (y_parent + ib->y) * scale;
ib_p_width = (ib->padding[LEFT] + ib->width +
ib->padding[RIGHT]) * scale;
ib_b_left = ib->border[LEFT].width * scale;
ib_b_right = ib->border[RIGHT].width * scale;
}
if ((ib->flags & NEW_LINE) && ib != box) {
/* inline element has wrapped, plot background
* and borders */
if (!html_redraw_inline_background(
x, y, box, scale, &p, b,
first, false,
&current_background_color,
&html->len_ctx, ctx))
return false;
/* restore previous graphics window */
if (ctx->plot->clip(ctx, &r) != NSERROR_OK)
return false;
if (!html_redraw_inline_borders(box, b, &r,
scale, first, false, ctx))
return false;
/* reset coords */
b.x0 = ib_x - ib_b_left;
b.y0 = ib_y - border_top - padding_top;
b.y1 = ib_y + padding_height - padding_top +
border_bottom;
p.x0 = b.x0 < r.x0 ? r.x0 : b.x0;
p.y0 = b.y0 < r.y0 ? r.y0 : b.y0;
p.y1 = b.y1 < r.y1 ? b.y1 : r.y1;
first = false;
}
/* increase width for current box */
b.x1 = ib_x + ib_p_width + ib_b_right;
p.x1 = b.x1 < r.x1 ? b.x1 : r.x1;
if (ib == box->inline_end)
/* reached end of BOX_INLINE span */
break;
}
/* plot background and borders for last rectangle of
* the inline */
if (!html_redraw_inline_background(x, ib_y, box, scale, &p, b,
first, true, &current_background_color,
&html->len_ctx, ctx))
return false;
/* restore previous graphics window */
if (ctx->plot->clip(ctx, &r) != NSERROR_OK)
return false;
if (!html_redraw_inline_borders(box, b, &r, scale, first, true,
ctx))
return false;
}
/* Debug outlines */
if (html_redraw_debug) {
int margin_left, margin_right;
int margin_top, margin_bottom;
if (scale == 1.0) {
/* avoid trivial fp maths */
margin_left = box->margin[LEFT];
margin_top = box->margin[TOP];
margin_right = box->margin[RIGHT];
margin_bottom = box->margin[BOTTOM];
} else {
margin_left = box->margin[LEFT] * scale;
margin_top = box->margin[TOP] * scale;
margin_right = box->margin[RIGHT] * scale;
margin_bottom = box->margin[BOTTOM] * scale;
}
/* Content edge -- blue */
rect.x0 = x + padding_left;
rect.y0 = y + padding_top;
rect.x1 = x + padding_left + width;
rect.y1 = y + padding_top + height;
if (ctx->plot->rectangle(ctx, plot_style_content_edge, &rect) != NSERROR_OK)
return false;
/* Padding edge -- red */
rect.x0 = x;
rect.y0 = y;
rect.x1 = x + padding_width;
rect.y1 = y + padding_height;
if (ctx->plot->rectangle(ctx, plot_style_padding_edge, &rect) != NSERROR_OK)
return false;
/* Margin edge -- yellow */
rect.x0 = x - border_left - margin_left;
rect.y0 = y - border_top - margin_top;
rect.x1 = x + padding_width + border_right + margin_right;
rect.y1 = y + padding_height + border_bottom + margin_bottom;
if (ctx->plot->rectangle(ctx, plot_style_margin_edge, &rect) != NSERROR_OK)
return false;
}
/* clip to the padding edge for objects, or boxes with overflow hidden
* or scroll, unless it's the root element */
if (box->parent != NULL) {
bool need_clip = false;
if (box->object || box->flags & IFRAME ||
(overflow_x != CSS_OVERFLOW_VISIBLE &&
overflow_y != CSS_OVERFLOW_VISIBLE)) {
r.x0 = x;
r.y0 = y;
r.x1 = x + padding_width;
r.y1 = y + padding_height;
if (r.x0 < clip->x0) r.x0 = clip->x0;
if (r.y0 < clip->y0) r.y0 = clip->y0;
if (clip->x1 < r.x1) r.x1 = clip->x1;
if (clip->y1 < r.y1) r.y1 = clip->y1;
if (r.x1 <= r.x0 || r.y1 <= r.y0) {
return (!ctx->plot->group_end ||
(ctx->plot->group_end(ctx) == NSERROR_OK));
}
need_clip = true;
} else if (overflow_x != CSS_OVERFLOW_VISIBLE) {
r.x0 = x;
r.y0 = clip->y0;
r.x1 = x + padding_width;
r.y1 = clip->y1;
if (r.x0 < clip->x0) r.x0 = clip->x0;
if (clip->x1 < r.x1) r.x1 = clip->x1;
if (r.x1 <= r.x0) {
return (!ctx->plot->group_end ||
(ctx->plot->group_end(ctx) == NSERROR_OK));
}
need_clip = true;
} else if (overflow_y != CSS_OVERFLOW_VISIBLE) {
r.x0 = clip->x0;
r.y0 = y;
r.x1 = clip->x1;
r.y1 = y + padding_height;
if (r.y0 < clip->y0) r.y0 = clip->y0;
if (clip->y1 < r.y1) r.y1 = clip->y1;
if (r.y1 <= r.y0) {
return (!ctx->plot->group_end ||
(ctx->plot->group_end(ctx) == NSERROR_OK));
}
need_clip = true;
}
if (need_clip &&
(box->type == BOX_BLOCK ||
box->type == BOX_INLINE_BLOCK ||
box->type == BOX_TABLE_CELL || box->object)) {
if (ctx->plot->clip(ctx, &r) != NSERROR_OK)
return false;
}
}
/* text decoration */
if ((box->type != BOX_TEXT) &&
box->style &&
css_computed_text_decoration(box->style) != CSS_TEXT_DECORATION_NONE) {
if (!html_redraw_text_decoration(box, x_parent, y_parent,
scale, current_background_color, ctx))
return false;
}
if (box->object && width != 0 && height != 0) {
struct content_redraw_data obj_data;
x_scrolled = x - scrollbar_get_offset(box->scroll_x) * scale;
y_scrolled = y - scrollbar_get_offset(box->scroll_y) * scale;
obj_data.x = x_scrolled + padding_left;
obj_data.y = y_scrolled + padding_top;
obj_data.width = width;
obj_data.height = height;
obj_data.background_colour = current_background_color;
obj_data.scale = scale;
obj_data.repeat_x = false;
obj_data.repeat_y = false;
if (content_get_type(box->object) == CONTENT_HTML) {
obj_data.x /= scale;
obj_data.y /= scale;
}
if (!content_redraw(box->object, &obj_data, &r, ctx)) {
/* Show image fail */
/* Unicode (U+FFFC) 'OBJECT REPLACEMENT CHARACTER' */
const char *obj = "\xef\xbf\xbc";
int obj_width;
int obj_x = x + padding_left;
nserror res;
rect.x0 = x + padding_left;
rect.y0 = y + padding_top;
rect.x1 = x + padding_left + width - 1;
rect.y1 = y + padding_top + height - 1;
res = ctx->plot->rectangle(ctx, plot_style_broken_object, &rect);
if (res != NSERROR_OK) {
return false;
}
res = guit->layout->width(plot_fstyle_broken_object,
obj,
sizeof(obj) - 1,
&obj_width);
if (res != NSERROR_OK) {
obj_x += 1;
} else {
obj_x += width / 2 - obj_width / 2;
}
if (ctx->plot->text(ctx,
plot_fstyle_broken_object,
obj_x, y + padding_top + (int)(height * 0.75),
obj, sizeof(obj) - 1) != NSERROR_OK)
return false;
}
} else if (box->iframe) {
/* Offset is passed to browser window redraw unscaled */
browser_window_redraw(box->iframe,
x + padding_left,
y + padding_top, &r, ctx);
} else if (box->gadget && box->gadget->type == GADGET_CHECKBOX) {
if (!html_redraw_checkbox(x + padding_left, y + padding_top,
width, height, box->gadget->selected, ctx))
return false;
} else if (box->gadget && box->gadget->type == GADGET_RADIO) {
if (!html_redraw_radio(x + padding_left, y + padding_top,
width, height, box->gadget->selected, ctx))
return false;
} else if (box->gadget && box->gadget->type == GADGET_FILE) {
if (!html_redraw_file(x + padding_left, y + padding_top,
width, height, box, scale,
current_background_color, &html->len_ctx, ctx))
return false;
} else if (box->gadget &&
(box->gadget->type == GADGET_TEXTAREA ||
box->gadget->type == GADGET_PASSWORD ||
box->gadget->type == GADGET_TEXTBOX)) {
textarea_redraw(box->gadget->data.text.ta, x, y,
current_background_color, scale, &r, ctx);
} else if (box->text) {
if (!html_redraw_text_box(html, box, x, y, &r, scale,
current_background_color, ctx))
return false;
} else {
if (!html_redraw_box_children(html, box, x_parent, y_parent, &r,
scale, current_background_color, ctx))
return false;
}
if (box->type == BOX_BLOCK || box->type == BOX_INLINE_BLOCK ||
box->type == BOX_TABLE_CELL || box->type == BOX_INLINE)
if (ctx->plot->clip(ctx, clip) != NSERROR_OK)
return false;
/* list marker */
if (box->list_marker) {
if (!html_redraw_box(html, box->list_marker,
x_parent + box->x -
scrollbar_get_offset(box->scroll_x),
y_parent + box->y -
scrollbar_get_offset(box->scroll_y),
clip, scale, current_background_color, ctx))
return false;
}
/* scrollbars */
if (((box->style && box->type != BOX_BR &&
box->type != BOX_TABLE && box->type != BOX_INLINE &&
(box->gadget == NULL || box->gadget->type != GADGET_TEXTAREA) &&
(overflow_x == CSS_OVERFLOW_SCROLL ||
overflow_x == CSS_OVERFLOW_AUTO ||
overflow_y == CSS_OVERFLOW_SCROLL ||
overflow_y == CSS_OVERFLOW_AUTO)) ||
(box->object && content_get_type(box->object) ==
CONTENT_HTML)) && box->parent != NULL) {
nserror res;
bool has_x_scroll = (overflow_x == CSS_OVERFLOW_SCROLL);
bool has_y_scroll = (overflow_y == CSS_OVERFLOW_SCROLL);
has_x_scroll |= (overflow_x == CSS_OVERFLOW_AUTO) &&
box_hscrollbar_present(box);
has_y_scroll |= (overflow_y == CSS_OVERFLOW_AUTO) &&
box_vscrollbar_present(box);
res = box_handle_scrollbars((struct content *)html,
box, has_x_scroll, has_y_scroll);
if (res != NSERROR_OK) {
NSLOG(netsurf, INFO, "%s", messages_get_errorcode(res));
return false;
}
if (box->scroll_x != NULL)
scrollbar_redraw(box->scroll_x,
x_parent + box->x,
y_parent + box->y + box->padding[TOP] +
box->height + box->padding[BOTTOM] -
SCROLLBAR_WIDTH, clip, scale, ctx);
if (box->scroll_y != NULL)
scrollbar_redraw(box->scroll_y,
x_parent + box->x + box->padding[LEFT] +
box->width + box->padding[RIGHT] -
SCROLLBAR_WIDTH,
y_parent + box->y, clip, scale, ctx);
}
if (box->type == BOX_BLOCK || box->type == BOX_INLINE_BLOCK ||
box->type == BOX_TABLE_CELL || box->type == BOX_INLINE) {
if (ctx->plot->clip(ctx, clip) != NSERROR_OK)
return false;
}
return ((!plot->group_end) || (ctx->plot->group_end(ctx) == NSERROR_OK));
}
/**
* Draw a CONTENT_HTML using the current set of plotters (plot).
*
* \param c content of type CONTENT_HTML
* \param data redraw data for this content redraw
* \param clip current clip region
* \param ctx current redraw context
* \return true if successful, false otherwise
*
* x, y, clip_[xy][01] are in target coordinates.
*/
bool html_redraw(struct content *c, struct content_redraw_data *data,
const struct rect *clip, const struct redraw_context *ctx)
{
html_content *html = (html_content *) c;
struct box *box;
bool result = true;
bool select, select_only;
plot_style_t pstyle_fill_bg = {
.fill_type = PLOT_OP_TYPE_SOLID,
.fill_colour = data->background_colour,
};
box = html->layout;
assert(box);
/* The select menu needs special treating because, when opened, it
* reaches beyond its layout box.
*/
select = false;
select_only = false;
if (ctx->interactive && html->visible_select_menu != NULL) {
struct form_control *control = html->visible_select_menu;
select = true;
/* check if the redraw rectangle is completely inside of the
select menu */
select_only = form_clip_inside_select_menu(control,
data->scale, clip);
}
if (!select_only) {
/* clear to background colour */
result = (ctx->plot->clip(ctx, clip) == NSERROR_OK);
if (html->background_colour != NS_TRANSPARENT)
pstyle_fill_bg.fill_colour = html->background_colour;
result &= (ctx->plot->rectangle(ctx, &pstyle_fill_bg, clip) == NSERROR_OK);
result &= html_redraw_box(html, box, data->x, data->y, clip,
data->scale, pstyle_fill_bg.fill_colour, ctx);
}
if (select) {
int menu_x, menu_y;
box = html->visible_select_menu->box;
box_coords(box, &menu_x, &menu_y);
menu_x -= box->border[LEFT].width;
menu_y += box->height + box->border[BOTTOM].width +
box->padding[BOTTOM] + box->padding[TOP];
result &= form_redraw_select_menu(html->visible_select_menu,
data->x + menu_x, data->y + menu_y,
data->scale, clip, ctx);
}
return result;
}
Reference in New Issue View Git Blame Copy Permalink