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netsurf/riscos/htmlredraw.c

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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
*/
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include "oslib/colourtrans.h"
#include "oslib/draw.h"
#include "oslib/font.h"
#include "netsurf/css/css.h"
#include "netsurf/content/content.h"
#include "netsurf/render/form.h"
#include "netsurf/render/html.h"
#include "netsurf/riscos/gui.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/messages.h"
#include "netsurf/utils/utils.h"
static void html_redraw_box(struct content *content, struct box * box,
signed long x, signed long y,
unsigned long current_background_color,
signed long gadget_subtract_x, signed long gadget_subtract_y,
bool *select_on,
long clip_x0, long clip_y0, long clip_x1, long clip_y1,
float scale);
static void html_redraw_clip(long clip_x0, long clip_y0,
long clip_x1, long clip_y1);
static void html_redraw_rectangle(int x0, int y0, int width, int height,
os_colour colour);
static void html_redraw_fill(int x0, int y0, int width, int height,
os_colour colour);
static void html_redraw_circle(int x0, int y0, int radius,
os_colour colour);
static void html_redraw_border(colour color, int width, css_border_style style,
int x0, int y0, int x1, int y1);
static void html_redraw_checkbox(int x, int y, int width, int height,
bool selected);
static void html_redraw_radio(int x, int y, int width, int height,
bool selected);
static void html_redraw_file(int x, int y, int width, int height,
struct box *box, float scale);
bool gui_redraw_debug = false;
static os_trfm trfm = { {
{ 65536, 0 },
{ 0, 65536 },
{ 0, 0 } } };
void html_redraw(struct content *c, long x, long y,
unsigned long width, unsigned long height,
long clip_x0, long clip_y0, long clip_x1, long clip_y1,
float scale)
{
bool select_on = false;
unsigned long background_colour = 0xffffff;
struct box *box;
assert(c->data.html.layout != NULL);
box = c->data.html.layout->children;
assert(box);
/* clear to background colour */
if (c->data.html.background_colour != TRANSPARENT)
background_colour = c->data.html.background_colour;
colourtrans_set_gcol(background_colour << 8,
colourtrans_SET_BG | colourtrans_USE_ECFS,
os_ACTION_OVERWRITE, 0);
os_clg();
trfm.entries[0][0] = trfm.entries[1][1] = 65536 * scale;
html_redraw_box(c, box, x, y, background_colour, x, y,
&select_on, clip_x0, clip_y0, clip_x1, clip_y1, scale);
}
void html_redraw_box(struct content *content, struct box * box,
signed long x, signed long y,
unsigned long current_background_color,
signed long gadget_subtract_x, signed long gadget_subtract_y,
bool *select_on,
long clip_x0, long clip_y0, long clip_x1, long clip_y1,
float scale)
{
struct box *c;
int width, height;
int padding_left, padding_top;
int padding_width, padding_height;
int x0, y0, x1, y1;
int colour;
x += box->x * 2 * scale;
y -= box->y * 2 * scale;
width = box->width * 2 * scale;
height = box->height * 2 * scale;
padding_left = box->padding[LEFT] * 2 * scale;
padding_top = box->padding[TOP] * 2 * scale;
padding_width = (box->padding[LEFT] + box->width +
box->padding[RIGHT]) * 2 * scale;
padding_height = (box->padding[TOP] + box->height +
box->padding[BOTTOM]) * 2 * scale;
x0 = x;
y1 = y - 1;
x1 = x0 + padding_width - 1;
y0 = y1 - padding_height + 1;
/* if visibility is hidden render children only */
if (box->style->visibility == CSS_VISIBILITY_HIDDEN) {
for (c = box->children; c; c = c->next)
html_redraw_box(content, c, x, y, current_background_color,
gadget_subtract_x, gadget_subtract_y, select_on,
x0, y0, x1, y1, scale);
return;
}
if (gui_redraw_debug) {
html_redraw_rectangle(x, y, padding_width, padding_height,
os_COLOUR_MAGENTA);
html_redraw_rectangle(x + padding_left, y - padding_top,
width, height, os_COLOUR_CYAN);
html_redraw_rectangle(x - (box->border[LEFT] +
box->margin[LEFT]) * 2 * scale,
y + (box->border[TOP] + box->margin[TOP]) *
2 * scale,
padding_width + (box->border[LEFT] +
box->margin[LEFT] + box->border[RIGHT] +
box->margin[RIGHT]) * 2 * scale,
padding_height + (box->border[TOP] +
box->margin[TOP] + box->border[BOTTOM] +
box->margin[BOTTOM]) * 2 * scale,
os_COLOUR_YELLOW);
}
/* borders */
if (box->style && box->border[TOP])
html_redraw_border(box->style->border[TOP].color,
box->border[TOP] * 2 * scale,
box->style->border[TOP].style,
x - box->border[LEFT] * 2 * scale,
y + box->border[TOP] * scale,
x + padding_width + box->border[RIGHT] *
2 * scale,
y + box->border[TOP] * scale);
if (box->style && box->border[RIGHT])
html_redraw_border(box->style->border[RIGHT].color,
box->border[RIGHT] * 2 * scale,
box->style->border[RIGHT].style,
x + padding_width + box->border[RIGHT] * scale,
y + box->border[TOP] * 2 * scale,
x + padding_width + box->border[RIGHT] * scale,
y - padding_height - box->border[BOTTOM] *
2 * scale);
if (box->style && box->border[BOTTOM])
html_redraw_border(box->style->border[BOTTOM].color,
box->border[BOTTOM] * 2 * scale,
box->style->border[BOTTOM].style,
x - box->border[LEFT] * 2 * scale,
y - padding_height - box->border[BOTTOM] *
scale,
x + padding_width + box->border[RIGHT] *
2 * scale,
y - padding_height - box->border[BOTTOM] *
scale);
if (box->style && box->border[LEFT])
html_redraw_border(box->style->border[LEFT].color,
box->border[LEFT] * 2 * scale,
box->style->border[LEFT].style,
x - box->border[LEFT] * scale,
y + box->border[TOP] * 2 * scale,
x - box->border[LEFT] * scale,
y - padding_height - box->border[BOTTOM] *
2 * scale);
/* return if the box is completely outside the clip rectangle, except
* for table rows which may contain cells spanning into other rows */
if (box->type != BOX_TABLE_ROW &&
(clip_y1 < y0 || y1 < clip_y0 ||
clip_x1 < x0 || x1 < clip_x0))
return;
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 (x0 < clip_x0) x0 = clip_x0;
if (y0 < clip_y0) y0 = clip_y0;
if (clip_x1 < x1) x1 = clip_x1;
if (clip_y1 < y1) y1 = clip_y1;
/* clip to it */
html_redraw_clip(x0, y0, x1, y1);
} else {
/* clip box unchanged */
x0 = clip_x0;
y0 = clip_y0;
x1 = clip_x1;
y1 = clip_y1;
}
/* background colour */
if (box->style != 0 && box->style->background_color != TRANSPARENT) {
/* find intersection of clip box and padding box */
int px0 = x < x0 ? x0 : x;
int py0 = y - padding_height < y0 ? y0 : y - padding_height;
int px1 = x + padding_width < x1 ? x + padding_width : x1;
int py1 = y < y1 ? y : y1;
colourtrans_set_gcol(box->style->background_color << 8,
colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0);
os_plot(os_MOVE_TO, px0, py0);
if (px0 < px1 && py0 < py1)
os_plot(os_PLOT_RECTANGLE | os_PLOT_TO, px1, py1);
current_background_color = box->style->background_color;
}
if (box->object) {
content_redraw(box->object, x + padding_left, y - padding_top,
width, height, x0, y0, x1, y1, scale);
} else if (box->gadget && box->gadget->type == GADGET_CHECKBOX) {
html_redraw_checkbox(x + padding_left, y - padding_top,
width, height,
box->gadget->selected);
} else if (box->gadget && box->gadget->type == GADGET_RADIO) {
html_redraw_radio(x + padding_left, y - padding_top,
width, height,
box->gadget->selected);
} else if (box->gadget && box->gadget->type == GADGET_FILE) {
colourtrans_set_font_colours(box->font->handle,
current_background_color << 8,
box->style->color << 8, 14, 0, 0, 0);
html_redraw_file(x + padding_left, y - padding_top,
width, height, box, scale);
} else if (box->text && box->font) {
if (content->data.html.text_selection.selected == 1) {
struct box_position *start;
struct box_position *end;
start = &(content->data.html.text_selection.start);
end = &(content->data.html.text_selection.end);
if (start->box == box) {
fprintf(stderr, "THE START OFFSET IS %d\n", start->pixel_offset * 2);
if (end->box == box) {
colourtrans_set_gcol(os_COLOUR_VERY_LIGHT_GREY, colourtrans_USE_ECFS, 0, 0);
os_plot(os_MOVE_TO,
x + start->pixel_offset * 2,
y - height);
os_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
x + end->pixel_offset * 2 - 2,
y - 2);
} else {
colourtrans_set_gcol(os_COLOUR_VERY_LIGHT_GREY, colourtrans_USE_ECFS, 0, 0);
os_plot(os_MOVE_TO,
x + start->pixel_offset * 2,
y - height);
os_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
x + width - 2,
y - 2);
*select_on = true;
}
} else if (*select_on) {
if (end->box != box) {
colourtrans_set_gcol(os_COLOUR_VERY_LIGHT_GREY, colourtrans_USE_ECFS, 0, 0);
os_plot(os_MOVE_TO, x,
y - height);
os_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
x + width - 2,
y - 2);
} else {
colourtrans_set_gcol(os_COLOUR_VERY_LIGHT_GREY, colourtrans_USE_ECFS, 0, 0);
os_plot(os_MOVE_TO, x,
y - height);
os_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
x + end->pixel_offset * 2 - 2,
y - 2);
*select_on = false;
}
}
}
colourtrans_set_font_colours(box->font->handle,
current_background_color << 8,
box->style->color << 8, 14, 0, 0, 0);
/* antialias colour for under/overline */
colour = box->style->color;
colour = ((((colour >> 16) + (current_background_color >> 16)) / 2) << 16)
| (((((colour >> 8) & 0xff) +
((current_background_color >> 8) & 0xff)) / 2) << 8)
| ((((colour & 0xff) +
(current_background_color & 0xff)) / 2) << 0);
colourtrans_set_gcol((unsigned int)colour << 8, colourtrans_USE_ECFS,
os_ACTION_OVERWRITE, 0);
if (box->style->text_decoration & CSS_TEXT_DECORATION_UNDERLINE) {
os_plot(os_MOVE_TO, x, y - (int) (box->height * 1.8 * scale));
os_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
}
if (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_UNDERLINE && box->parent->parent->type == BOX_BLOCK) {
colourtrans_set_gcol((unsigned int)box->parent->parent->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0);
os_plot(os_MOVE_TO, x, y - (int) (box->height * 1.8 * scale));
os_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
colourtrans_set_gcol((unsigned int)box->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0);
}
if (box->style->text_decoration & CSS_TEXT_DECORATION_OVERLINE) {
os_plot(os_MOVE_TO, x, y - (int) (box->height * 0.2 * scale));
os_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
}
if (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_OVERLINE && box->parent->parent->type == BOX_BLOCK) {
colourtrans_set_gcol((unsigned int)box->parent->parent->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0);
os_plot(os_MOVE_TO, x, y - (int) (box->height * 0.2 * scale));
os_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
colourtrans_set_gcol((unsigned int)box->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0);
}
if (box->style->text_decoration & CSS_TEXT_DECORATION_LINE_THROUGH) {
os_plot(os_MOVE_TO, x, y - (int) (box->height * 1.0 * scale));
os_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
}
if (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_LINE_THROUGH && box->parent->parent->type == BOX_BLOCK) {
colourtrans_set_gcol((unsigned int)box->parent->parent->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0);
os_plot(os_MOVE_TO, x, y - (int) (box->height * 1.0 * scale));
os_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
colourtrans_set_gcol((unsigned int)box->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0);
}
if (scale == 1)
font_paint(box->font->handle, box->text,
font_OS_UNITS | font_GIVEN_FONT |
font_KERN | font_GIVEN_LENGTH,
x, y - (int) (box->height * 1.5),
0, 0, (int) box->length);
else
font_paint(box->font->handle, box->text,
font_OS_UNITS | font_GIVEN_FONT |
font_KERN | font_GIVEN_LENGTH |
font_GIVEN_TRFM,
x, y - (int) (box->height * 1.5 * scale),
0, &trfm, (int) box->length);
} else {
for (c = box->children; c != 0; c = c->next)
if (c->type != BOX_FLOAT_LEFT && c->type != BOX_FLOAT_RIGHT)
html_redraw_box(content, c, x,
y, current_background_color,
gadget_subtract_x, gadget_subtract_y, select_on,
x0, y0, x1, y1, scale);
for (c = box->float_children; c != 0; c = c->next_float)
html_redraw_box(content, c, x,
y, current_background_color,
gadget_subtract_x, gadget_subtract_y, select_on,
x0, y0, x1, y1, scale);
}
if (box->type == BOX_BLOCK || box->type == BOX_INLINE_BLOCK ||
box->type == BOX_TABLE_CELL || box->object)
html_redraw_clip(clip_x0, clip_y0, clip_x1, clip_y1);
/* } else {
if (content->data.html.text_selection.selected == 1) {
struct box_position *start;
struct box_position *end;
start = &(content->data.html.text_selection.start);
end = &(content->data.html.text_selection.end);
if (start->box == box && end->box != box)
*select_on = true;
else if (*select_on && end->box == box)
*select_on = false;
}
}*/
}
void html_redraw_clip(long clip_x0, long clip_y0,
long clip_x1, long clip_y1)
{
os_set_graphics_window();
os_writec((char) (clip_x0 & 0xff)); os_writec((char) (clip_x0 >> 8));
os_writec((char) (clip_y0 & 0xff)); os_writec((char) (clip_y0 >> 8));
os_writec((char) (clip_x1 & 0xff)); os_writec((char) (clip_x1 >> 8));
os_writec((char) (clip_y1 & 0xff)); os_writec((char) (clip_y1 >> 8));
}
/**
* Plot a dotted rectangle outline.
*/
void html_redraw_rectangle(int x0, int y0, int width, int height,
os_colour colour)
{
colourtrans_set_gcol(colour, 0, os_ACTION_OVERWRITE, 0);
os_plot(os_MOVE_TO, x0, y0);
os_plot(os_PLOT_DOTTED | os_PLOT_BY, width, 0);
os_plot(os_PLOT_DOTTED | os_PLOT_BY, 0, -height);
os_plot(os_PLOT_DOTTED | os_PLOT_BY, -width, 0);
os_plot(os_PLOT_DOTTED | os_PLOT_BY, 0, height);
}
/**
* Fill a rectangle of colour.
*/
void html_redraw_fill(int x0, int y0, int width, int height,
os_colour colour)
{
colourtrans_set_gcol(colour, 0, os_ACTION_OVERWRITE, 0);
os_plot(os_MOVE_TO, x0, y0 - height);
os_plot(os_PLOT_RECTANGLE | os_PLOT_BY, width - 1, height - 1);
}
/**
* Fill a circle of colour.
*/
void html_redraw_circle(int x0, int y0, int radius,
os_colour colour)
{
colourtrans_set_gcol(colour, 0, os_ACTION_OVERWRITE, 0);
os_plot(os_MOVE_TO, x0, y0);
os_plot(os_PLOT_CIRCLE | os_PLOT_BY, radius, 0);
}
static int path[] = { draw_MOVE_TO, 0, 0, draw_LINE_TO, 0, 0,
draw_END_PATH, 0 };
static const draw_line_style line_style = { draw_JOIN_MITRED,
draw_CAP_BUTT, draw_CAP_BUTT, 0, 0x7fffffff,
0, 0, 0, 0 };
static const int dash_pattern_dotted[] = { 0, 1, 512 };
static const int dash_pattern_dashed[] = { 0, 1, 2048 };
void html_redraw_border(colour color, int width, css_border_style style,
int x0, int y0, int x1, int y1)
{
draw_dash_pattern *dash_pattern = 0;
os_error *error;
if (style == CSS_BORDER_STYLE_DOTTED)
dash_pattern = (draw_dash_pattern *) &dash_pattern_dotted;
else if (style == CSS_BORDER_STYLE_DASHED)
dash_pattern = (draw_dash_pattern *) &dash_pattern_dashed;
path[1] = x0 * 256;
path[2] = y0 * 256;
path[4] = x1 * 256;
path[5] = y1 * 256;
error = xcolourtrans_set_gcol(color << 8, 0, os_ACTION_OVERWRITE, 0, 0);
if (error)
LOG(("xcolourtrans_set_gcol: 0x%x: %s",
error->errnum, error->errmess));
error = xdraw_stroke((draw_path *) path, 0, 0, 0, width * 256,
&line_style, dash_pattern);
if (error)
LOG(("xdraw_stroke: 0x%x: %s",
error->errnum, error->errmess));
}
/**
* Plot a checkbox.
*/
void html_redraw_checkbox(int x, int y, int width, int height,
bool selected)
{
int z = width * 0.15;
if (z == 0)
z = 1;
html_redraw_fill(x, y, width, height, os_COLOUR_BLACK);
html_redraw_fill(x + z, y - z, width - z - z, height - z - z,
os_COLOUR_WHITE);
if (selected)
html_redraw_fill(x + z + z, y - z - z,
width - z - z - z - z, height - z - z - z - z,
os_COLOUR_RED);
}
/**
* Plot a radio icon.
*/
void html_redraw_radio(int x, int y, int width, int height,
bool selected)
{
html_redraw_circle(x + width * 0.5, y - height * 0.5,
width * 0.5 - 1, os_COLOUR_BLACK);
html_redraw_circle(x + width * 0.5, y - height * 0.5,
width * 0.4 - 1, os_COLOUR_WHITE);
if (selected)
html_redraw_circle(x + width * 0.5, y - height * 0.5,
width * 0.3 - 1, os_COLOUR_RED);
}
/**
* Plot a file upload input.
*/
void html_redraw_file(int x, int y, int width, int height,
struct box *box, float scale)
{
int text_width;
const char *text;
const char *sprite;
if (box->gadget->value) {
text = box->gadget->value;
sprite = "file_fff";
} else {
text = messages_get("Form_Drop");
sprite = "drophere";
}
text_width = font_width(box->font, text, strlen(text)) * 2 * scale;
if (width < text_width + 8)
x = x + width - text_width - 4;
else
x = x + 4;
font_paint(box->font->handle, text,
font_OS_UNITS | font_GIVEN_FONT |
font_KERN | font_GIVEN_TRFM,
x, y - height * 0.75, 0, &trfm, 0);
/* xwimpspriteop_put_sprite_user_coords(sprite, x + 4, */
/* y - height / 2 - 17, os_ACTION_OVERWRITE); */
}
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