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netsurf/riscos/wimp.c

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/*
* Copyright 2004, 2005 Richard Wilson <info@tinct.net>
* Copyright 2008 John Tytgat <joty@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* General RISC OS WIMP/OS library functions (implementation).
*/
#include <assert.h>
#include <locale.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "oslib/colourtrans.h"
#include "oslib/os.h"
#include "oslib/osfile.h"
#include "oslib/wimp.h"
#include "oslib/wimpextend.h"
#include "oslib/wimpspriteop.h"
#include "utils/log.h"
#include "utils/utf8.h"
#include "utils/utils.h"
#include "riscos/gui.h"
#include "riscos/oslib_pre7.h"
#include "riscos/wimp.h"
#include "riscos/ucstables.h"
static void ro_gui_wimp_cache_furniture_sizes(wimp_w w);
static size_t ro_gui_strlen(const char *str);
static int ro_gui_strncmp(const char *s1, const char *s2, size_t len);
static wimpextend_furniture_sizes furniture_sizes;
static wimp_w furniture_window = NULL;
/**
* Gets the horizontal scrollbar height
*
* \param w the window to read (or NULL to read a cached value)
*/
int ro_get_hscroll_height(wimp_w w)
{
ro_gui_wimp_cache_furniture_sizes(w);
return furniture_sizes.border_widths.y0;
}
/**
* Gets the vertical scrollbar width
*
* \param w the window to read (or NULL to read a cached value)
*/
int ro_get_vscroll_width(wimp_w w)
{
ro_gui_wimp_cache_furniture_sizes(w);
return furniture_sizes.border_widths.x1;
}
/**
* Gets the title bar height
*
* \param w the window to read (or NULL to read a cached value)
*/
int ro_get_title_height(wimp_w w)
{
ro_gui_wimp_cache_furniture_sizes(w);
return furniture_sizes.border_widths.y1;
}
/**
* Caches window furniture information
*
* \param w the window to cache information from
* \return true on success, false on error (default values cached)
*/
void ro_gui_wimp_cache_furniture_sizes(wimp_w w)
{
os_error *error;
if (furniture_window == w)
return;
furniture_window = w;
furniture_sizes.w = w;
furniture_sizes.border_widths.y0 = 40;
furniture_sizes.border_widths.x1 = 40;
error = xwimpextend_get_furniture_sizes(&furniture_sizes);
if (error) {
LOG("xwimpextend_get_furniture_sizes: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
}
}
/**
* Reads a modes EIG factors.
*
* \param[in] mode mode to read EIG factors for, or -1 for current
* \param[out] xeig The x eig value
* \param[out] yeig The y eig value
* \return true on success else false.
*/
bool ro_gui_wimp_read_eig_factors(os_mode mode, int *xeig, int *yeig)
{
os_error *error;
error = xos_read_mode_variable(mode, os_MODEVAR_XEIG_FACTOR, xeig, 0);
if (error) {
LOG("xos_read_mode_variable: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("MiscError", error->errmess);
return false;
}
error = xos_read_mode_variable(mode, os_MODEVAR_YEIG_FACTOR, yeig, 0);
if (error) {
LOG("xos_read_mode_variable: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("MiscError", error->errmess);
return false;
}
return true;
}
/**
* Converts the supplied os_coord from OS units to pixels.
*
* \param os_units values to convert
* \param mode mode to use EIG factors for, or -1 for current
*/
void ro_convert_os_units_to_pixels(os_coord *os_units, os_mode mode)
{
int xeig = 1, yeig = 1;
ro_gui_wimp_read_eig_factors(mode, &xeig, &yeig);
os_units->x = ((os_units->x + (1 << xeig) - 1) >> xeig);
os_units->y = ((os_units->y + (1 << yeig) - 1) >> yeig);
}
/**
* Converts the supplied os_coord from pixels to OS units.
*
* \param pixels values to convert
* \param mode mode to use EIG factors for, or -1 for current
*/
void ro_convert_pixels_to_os_units(os_coord *pixels, os_mode mode)
{
int xeig = 1, yeig = 1;
ro_gui_wimp_read_eig_factors(mode, &xeig, &yeig);
pixels->x = (pixels->x << xeig);
pixels->y = (pixels->y << yeig);
}
/**
* Redraws an icon
*
* \param w window handle
* \param i icon handle
*/
#define ro_gui_redraw_icon(w, i) xwimp_set_icon_state(w, i, 0, 0)
/**
* Forces an icon to be redrawn entirely (ie not just updated).
*
* \param w window handle
* \param i icon handle
*/
void ro_gui_force_redraw_icon(wimp_w w, wimp_i i)
{
wimp_icon_state ic;
os_error *error;
/* Get the icon data
*/
ic.w = w;
ic.i = i;
error = xwimp_get_icon_state(&ic);
if (error) {
LOG("xwimp_get_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
error = xwimp_force_redraw(w, ic.icon.extent.x0, ic.icon.extent.y0,
ic.icon.extent.x1, ic.icon.extent.y1);
if (error) {
LOG("xwimp_force_redraw: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
}
}
/**
* Read the contents of a text or sprite icon.
*
* \param w window handle
* \param i icon handle
* \return NUL terminated string in icon
*
* If the icon contains direct text then the returned data will
* be invalidated by the next call to this function. Therefore,
* all client calls to this function must either copy the string or
* ensure that this function is not called again until they are
* finished with the string data returned.
*
* \todo this doesn't do local encoding -> UTF-8 to match what is done in
* ro_gui_set_icon_string.
*/
const char *ro_gui_get_icon_string(wimp_w w, wimp_i i)
{
static wimp_icon_state ic;
os_error *error;
char *itext;
ic.w = w;
ic.i = i;
error = xwimp_get_icon_state(&ic);
if (error) {
LOG("xwimp_get_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return NULL;
}
itext = (ic.icon.flags & wimp_ICON_INDIRECTED)
? ic.icon.data.indirected_text.text : ic.icon.data.text;
/* Guarantee NUL termination. */
itext[ro_gui_strlen(itext)] = '\0';
return itext;
}
/**
* Set the contents of a text or sprite icon to a string.
*
* \param w window handle
* \param i icon handle
* \param text NUL terminated string (copied)
* \param is_utf8 When true, the given string is UTF-8 encoded and will be
* converted to local encoding currently used by the Wimp. When false, the
* given string is assumed to be in local encoding in use by the Wimp.
*/
void ro_gui_set_icon_string(wimp_w w, wimp_i i, const char *text, bool is_utf8)
{
wimp_caret caret;
wimp_icon_state ic;
os_error *error;
size_t old_len, new_len;
char *local_text = NULL;
const char *text_for_icon;
char *dst_text;
size_t dst_max_len;
unsigned int button_type;
if (is_utf8) {
nserror err;
/* convert text to local encoding */
err = utf8_to_local_encoding(text, 0, &local_text);
if (err != NSERROR_OK) {
/* A bad encoding should never happen, so assert this */
assert(err != NSERROR_BAD_ENCODING);
LOG("utf8_to_enc failed");
/* Paranoia */
local_text = NULL;
}
text_for_icon = local_text ? local_text : text;
}
else
text_for_icon = text;
new_len = strlen(text_for_icon);
/* get the icon data */
ic.w = w;
ic.i = i;
error = xwimp_get_icon_state(&ic);
if (error) {
LOG("xwimp_get_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
goto exit;
}
if (ic.icon.flags & wimp_ICON_INDIRECTED) {
dst_text = ic.icon.data.indirected_text.text;
dst_max_len = ic.icon.data.indirected_text.size;
}
else {
dst_text = ic.icon.data.text;
dst_max_len = sizeof(ic.icon.data.text);
}
old_len = ro_gui_strlen(dst_text);
assert(old_len < dst_max_len);
/* check that the existing text is not the same as the updated text
* to stop flicker */
if (dst_max_len) {
if (!ro_gui_strncmp(dst_text, text_for_icon, dst_max_len))
goto exit;
/* copy the text across */
strncpy(dst_text, text_for_icon, dst_max_len - 1);
dst_text[dst_max_len - 1] = '\0';
/* handle the caret being in the icon */
button_type = (ic.icon.flags & wimp_ICON_BUTTON_TYPE)
>> wimp_ICON_BUTTON_TYPE_SHIFT;
if ((button_type == wimp_BUTTON_WRITABLE) ||
(button_type == wimp_BUTTON_WRITE_CLICK_DRAG)) {
error = xwimp_get_caret_position(&caret);
if (error) {
LOG("xwimp_get_caret_position: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
goto exit;
}
if ((caret.w == w) && (caret.i == i)) {
if ((size_t)caret.index > new_len
|| (size_t)caret.index == old_len)
caret.index = new_len;
error = xwimp_set_caret_position(w, i, caret.pos.x,
caret.pos.y, -1, caret.index);
if (error) {
LOG("xwimp_set_caret_position: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
}
}
}
ro_gui_redraw_icon(w, i);
}
exit:
free(local_text);
}
/**
* Set the contents of an icon to a number.
*
* \param w window handle
* \param i icon handle
* \param value value
*/
void ro_gui_set_icon_integer(wimp_w w, wimp_i i, int value)
{
char buffer[20]; // Big enough for 64-bit int
setlocale(LC_NUMERIC, "");
sprintf(buffer, "%d", value);
setlocale(LC_NUMERIC, "C");
ro_gui_set_icon_string(w, i, buffer, true);
}
/**
* Set the contents of an icon to a number.
*
* \param w window handle
* \param i icon handle
* \param value value to use in icon.
* \param decimal_places The number of decimal places to use.
*/
void ro_gui_set_icon_decimal(wimp_w w, wimp_i i, int value, int decimal_places)
{
char buffer[20]; // Big enough for 64-bit int
setlocale(LC_NUMERIC, "");
switch (decimal_places) {
case 0:
sprintf(buffer, "%d", value);
break;
case 1:
sprintf(buffer, "%.1f", (float)value / 10);
break;
case 2:
sprintf(buffer, "%.2f", (float)value / 100);
break;
default:
assert(!"Unsupported decimal format");
break;
}
setlocale(LC_NUMERIC, "C");
ro_gui_set_icon_string(w, i, buffer, true);
}
/**
* Get the contents of an icon as a number.
*
* \param w window handle
* \param i icon handle
* \param decimal_places number of places to show.
* \return value used.
*/
int ro_gui_get_icon_decimal(wimp_w w, wimp_i i, int decimal_places)
{
double value;
int multiple = 1;
for (; decimal_places > 0; decimal_places--)
multiple *= 10;
setlocale(LC_NUMERIC, "");
value = atof(ro_gui_get_icon_string(w, i)) * multiple;
setlocale(LC_NUMERIC, "C");
return (int)value;
}
/**
* Set the selected state of an icon.
*
* \param w window handle
* \param i icon handle
* \param state selected state
*/
void ro_gui_set_icon_selected_state(wimp_w w, wimp_i i, bool state)
{
os_error *error;
if (ro_gui_get_icon_selected_state(w, i) == state) return;
error = xwimp_set_icon_state(w, i,
(state ? wimp_ICON_SELECTED : 0), wimp_ICON_SELECTED);
if (error) {
LOG("xwimp_set_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
}
}
/**
* Gets the selected state of an icon.
*
* \param w window handle
* \param i icon handle
*/
bool ro_gui_get_icon_selected_state(wimp_w w, wimp_i i)
{
os_error *error;
wimp_icon_state ic;
ic.w = w;
ic.i = i;
error = xwimp_get_icon_state(&ic);
if (error) {
LOG("xwimp_get_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return false;
}
return ((ic.icon.flags & wimp_ICON_SELECTED) != 0);
}
/**
* Set the shaded state of an icon.
*
* \param w window handle
* \param i icon handle
* \param state shaded state
*/
void ro_gui_set_icon_shaded_state(wimp_w w, wimp_i i, bool state)
{
wimp_caret caret;
os_error *error;
/* update the state */
if (ro_gui_get_icon_shaded_state(w, i) == state)
return;
error = xwimp_set_icon_state(w, i,
(state ? wimp_ICON_SHADED : 0), wimp_ICON_SHADED);
if (error) {
LOG("xwimp_get_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
}
if (!state)
return;
/* ensure the caret is not in a shaded icon */
error = xwimp_get_caret_position(&caret);
if (error) {
LOG("xwimp_get_caret_position: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
if ((caret.w != w) || (caret.i != i))
return;
/* move the caret to the first avaiable writable */
if (ro_gui_set_caret_first(w))
return;
/* lose the caret */
error = xwimp_set_caret_position((wimp_w)-1, (wimp_i)-1, -1, -1, -1, -1);
if (error) {
LOG("xwimp_set_caret_position: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
}
/**
* Gets the shaded state of an icon.
*
* \param w window handle
* \param i icon handle
*/
bool ro_gui_get_icon_shaded_state(wimp_w w, wimp_i i)
{
wimp_icon_state ic;
ic.w = w;
ic.i = i;
xwimp_get_icon_state(&ic);
return (ic.icon.flags & wimp_ICON_SHADED) != 0;
}
/**
* Set the deleted state of an icon.
*
* \param w window handle
* \param i icon handle
* \param state shaded state
*/
void ro_gui_set_icon_deleted_state(wimp_w w, wimp_i i, bool state)
{
wimp_caret caret;
os_error *error;
/* update the state */
if (ro_gui_get_icon_deleted_state(w, i) == state)
return;
error = xwimp_set_icon_state(w, i,
(state ? wimp_ICON_DELETED : 0), wimp_ICON_DELETED);
if (error) {
LOG("xwimp_get_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
}
if (!state)
return;
/* ensure the caret is not in a shaded icon */
error = xwimp_get_caret_position(&caret);
if (error) {
LOG("xwimp_get_caret_position: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
if ((caret.w != w) || (caret.i != i))
return;
/* move the caret to the first avaiable writable */
if (ro_gui_set_caret_first(w))
return;
/* lose the caret */
error = xwimp_set_caret_position((wimp_w)-1, (wimp_i)-1, -1, -1, -1, -1);
if (error) {
LOG("xwimp_set_caret_position: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
}
/**
* Gets the deleted state of an icon.
*
* \param w window handle
* \param i icon handle
*/
bool ro_gui_get_icon_deleted_state(wimp_w w, wimp_i i)
{
wimp_icon_state ic;
ic.w = w;
ic.i = i;
xwimp_get_icon_state(&ic);
return (ic.icon.flags & wimp_ICON_DELETED) != 0;
}
/**
* Set the button type of an icon.
*
* \param w window handle
* \param i icon handle
* \param type button type
*/
void ro_gui_set_icon_button_type(wimp_w w, wimp_i i, int type)
{
os_error *error;
error = xwimp_set_icon_state(w, i, wimp_ICON_BUTTON_TYPE,
(type << wimp_ICON_BUTTON_TYPE_SHIFT));
if (error) {
LOG("xwimp_set_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
}
}
/**
* Set an icon's sprite
*
* \param w window handle
* \param i icon handle
* \param area sprite area containing sprite
* \param name name of sprite in area (in local encoding)
*/
void ro_gui_set_icon_sprite(wimp_w w, wimp_i i, osspriteop_area *area,
const char *name)
{
wimp_icon_state ic;
os_error *error;
/* get the icon data */
ic.w = w;
ic.i = i;
error = xwimp_get_icon_state(&ic);
if (error) {
LOG("xwimp_get_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
/* copy the name across */
if (ic.icon.data.indirected_text.size) {
strncpy(ic.icon.data.indirected_text.text, name,
(unsigned int)ic.icon.data.indirected_text.size - 1);
ic.icon.data.indirected_text.text[
ic.icon.data.indirected_text.size - 1] = '\0';
}
ic.icon.data.indirected_sprite.area = area;
ro_gui_redraw_icon(w, i);
}
/**
* Set a window title
*
* \param w window handle
* \param text new title (copied)
*/
void ro_gui_set_window_title(wimp_w w, const char *text)
{
wimp_window_info_base window;
os_error *error;
char *title_local_enc;
nserror err;
/* Get the window details
*/
window.w = w;
error = xwimp_get_window_info_header_only((wimp_window_info *)&window);
if (error) {
LOG("xwimp_get_window_info: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
/* convert text to local encoding */
err = utf8_to_local_encoding(text, 0, &title_local_enc);
if (err != NSERROR_OK) {
/* A bad encoding should never happen,
* so assert this */
assert(err != NSERROR_BAD_ENCODING);
LOG("utf8_to_enc failed");
return;
}
/* Set the title string
*/
strncpy(window.title_data.indirected_text.text, title_local_enc,
(unsigned int)window.title_data.indirected_text.size
- 1);
window.title_data.indirected_text.text[
window.title_data.indirected_text.size - 1] = '\0';
/* Redraw accordingly
*/
error = xwimp_force_redraw_title(w);
if (error) {
LOG("xwimp_force_redraw_title: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
free(title_local_enc);
}
/**
* Places the caret in the first available icon
*
* \param w the window to place the caret in
* \return true if the caret was placed, false otherwise
*/
bool ro_gui_set_caret_first(wimp_w w)
{
int icon, b;
wimp_window_state win_state;
wimp_window_info_base window;
wimp_icon_state state;
os_error *error;
/* check the window is open */
win_state.w = w;
error = xwimp_get_window_state(&win_state);
if (error) {
LOG("xwimp_get_window_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return false;
}
if (!(win_state.flags & wimp_WINDOW_OPEN))
return false;
/* get the window details for the icon count */
window.w = w;
error = xwimp_get_window_info_header_only((wimp_window_info *)&window);
if (error) {
LOG("xwimp_get_window_info: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return false;
}
/* work through all the icons */
state.w = w;
for (icon = 0; icon < window.icon_count; icon++) {
state.i = icon;
error = xwimp_get_icon_state(&state);
if (error) {
LOG("xwimp_get_icon_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return false;
}
/* ignore if it's shaded or not writable */
if (state.icon.flags & wimp_ICON_SHADED)
continue;
b = (state.icon.flags >> wimp_ICON_BUTTON_TYPE_SHIFT) & 0xf;
if ((b != wimp_BUTTON_WRITE_CLICK_DRAG) &&
(b != wimp_BUTTON_WRITABLE))
continue;
/* move the caret */
error = xwimp_set_caret_position(w, icon, 0, 0, -1,
strlen(state.icon.data.indirected_text.text));
if (error) {
LOG("xwimp_set_caret_position: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
}
return true;
}
return false;
}
/**
* Load a sprite file into memory.
*
* \param pathname file to load
* \return sprite area, or 0 on memory exhaustion or error and error reported
*/
osspriteop_area *ro_gui_load_sprite_file(const char *pathname)
{
int len;
fileswitch_object_type obj_type;
osspriteop_area *area;
os_error *error;
error = xosfile_read_stamped_no_path(pathname,
&obj_type, 0, 0, &len, 0, 0);
if (error) {
LOG("xosfile_read_stamped_no_path: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("MiscError", error->errmess);
return 0;
}
if (obj_type != fileswitch_IS_FILE) {
ro_warn_user("FileError", pathname);
return 0;
}
area = malloc(len + 4);
if (!area) {
ro_warn_user("NoMemory", 0);
return 0;
}
area->size = len + 4;
area->sprite_count = 0;
area->first = 16;
area->used = 16;
error = xosspriteop_load_sprite_file(osspriteop_USER_AREA,
area, pathname);
if (error) {
LOG("xosspriteop_load_sprite_file: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("MiscError", error->errmess);
free(area);
return 0;
}
return area;
}
/**
* Check if a sprite is present in the Wimp sprite pool.
*
* \param sprite name of sprite
* \return true if the sprite is present
*/
bool ro_gui_wimp_sprite_exists(const char *sprite)
{
static char last_sprite_found[16];
os_error *error;
/* make repeated calls fast */
if (!strncmp(sprite, last_sprite_found, sizeof(last_sprite_found)))
return true;
/* fallback if not known to exist */
error = xwimpspriteop_select_sprite(sprite, 0);
if (error) {
if (error->errnum != error_SPRITE_OP_DOESNT_EXIST) {
LOG("xwimpspriteop_select_sprite: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("MiscError", error->errmess);
}
return false;
}
snprintf(last_sprite_found, sizeof(last_sprite_found), sprite);
return true;
}
/**
* Locate a sprite in the Wimp sprite pool, returning a pointer to it.
*
* \param name sprite name
* \param sprite receives pointer to sprite if found
* \return error ptr iff not found
*/
os_error *ro_gui_wimp_get_sprite(const char *name, osspriteop_header **sprite)
{
osspriteop_area *rom_base, *ram_base;
os_error *error;
error = xwimp_base_of_sprites(&rom_base, &ram_base);
if (error) return error;
error = xosspriteop_select_sprite(osspriteop_USER_AREA,
ram_base, (osspriteop_id)name, sprite);
if (error && error->errnum == error_SPRITE_OP_DOESNT_EXIST)
error = xosspriteop_select_sprite(osspriteop_USER_AREA,
rom_base, (osspriteop_id)name, sprite);
return error;
}
/**
* Get the dimensions of a sprite
*
* \param *area The sprite area to use.
* \param *sprite Pointer to the sprite name.
* \param *width Return the sprite width.
* \param *height Return the sprite height.
* \return true if successful; else false.
*/
bool ro_gui_wimp_get_sprite_dimensions(osspriteop_area *area, char *sprite,
int *width, int *height)
{
os_error *error = NULL;
os_mode mode;
os_coord dimensions;
dimensions.x = 0;
dimensions.y = 0;
if (area != (osspriteop_area *) -1)
error = xosspriteop_read_sprite_info(osspriteop_USER_AREA,
area, (osspriteop_id) sprite,
&dimensions.x, &dimensions.y, 0, &mode);
if (error != NULL || area == (osspriteop_area *) -1)
error = xwimpspriteop_read_sprite_info(sprite,
&dimensions.x, &dimensions.y, 0, &mode);
if (error == NULL) {
ro_convert_pixels_to_os_units(&dimensions, mode);
if (width != NULL)
*width = dimensions.x;
if (height != NULL)
*height = dimensions.y;
} else if (error->errnum != error_SPRITE_OP_DOESNT_EXIST) {
LOG("xosspriteop_read_sprite_info: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("MiscError", error->errmess);
return false;
}
return true;
}
/**
* Performs simple user redraw for a window.
*
* \param redraw wimp draw
* \param user_fill whether to fill the redraw area
* \param user_colour the colour to use when filling
*/
void ro_gui_user_redraw(wimp_draw *redraw, bool user_fill,
os_colour user_colour)
{
os_error *error;
osbool more;
error = xwimp_redraw_window(redraw, &more);
if (error) {
LOG("xwimp_redraw_window: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
while (more) {
if (user_fill) {
error = xcolourtrans_set_gcol(user_colour,
colourtrans_SET_BG_GCOL,
os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("MiscError", error->errmess);
}
os_clg();
}
error = xwimp_get_rectangle(redraw, &more);
if (error) {
LOG("xwimp_get_rectangle: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
}
}
/**
* Sets whether a piece of window furniture is present for a window.
*
* \param w the window to modify
* \param bic_mask the furniture flags to clear
* \param xor_mask the furniture flags to toggle
*/
void ro_gui_wimp_update_window_furniture(wimp_w w, wimp_window_flags bic_mask,
wimp_window_flags xor_mask)
{
wimp_window_state state;
wimp_w parent;
bits linkage;
os_error *error;
bool open;
state.w = w;
error = xwimp_get_window_state_and_nesting(&state, &parent, &linkage);
if (error) {
LOG("xwimp_get_window_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
open = state.flags & wimp_WINDOW_OPEN;
state.flags &= ~(63 << 16); /* clear bits 16-21 */
state.flags &= ~bic_mask;
state.flags ^= xor_mask;
if (!open)
state.next = wimp_HIDDEN;
error = xwimp_open_window_nested_with_flags(&state, parent, linkage);
if (error) {
LOG("xwimp_open_window: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
if (!open) {
error = xwimp_close_window(w);
if (error) {
LOG("xwimp_close_window: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return;
}
}
}
/**
* Checks whether a piece of window furniture is present for a window.
*
* \param w the window to modify
* \param mask the furniture flags to check
*/
bool ro_gui_wimp_check_window_furniture(wimp_w w, wimp_window_flags mask)
{
wimp_window_state state;
os_error *error;
state.w = w;
error = xwimp_get_window_state(&state);
if (error) {
LOG("xwimp_get_window_state: 0x%x: %s", error->errnum, error->errmess);
ro_warn_user("WimpError", error->errmess);
return false;
}
return state.flags & mask;
}
/**
* RO GUI-specific strlen, for control character terminated strings
*
* \param str The string to measure the length of
* \return The length of the string
*/
size_t ro_gui_strlen(const char *str)
{
const char *str_begin;
if (str == NULL)
return 0;
for (str_begin = str; *str++ >= ' '; /* */)
/* */;
return str - str_begin - 1;
}
/**
* RO GUI-specific strncmp, for control character terminated strings
*
* \param s1 The first string for comparison
* \param s2 The second string for comparison
* \param len Maximum number of bytes to be checked
* \return 0 for equal strings up to len bytes; pos for s1 being bigger than
* s2; neg for s1 being smaller than s2.
*/
int ro_gui_strncmp(const char *s1, const char *s2, size_t len)
{
while (len--) {
char c1 = *s1++;
char c2 = *s2++;
if (c1 < ' ' || c2 < ' ')
return (c1 < ' ' ? 0 : c1) - (c2 < ' ' ? 0 : c2);
int diff = c1 - c2;
if (diff)
return diff;
}
return 0;
}
/**
* Generic window scroll event handler.
*
* \param *scroll Pointer to Scroll Event block.
*/
void ro_gui_scroll(wimp_scroll *scroll)
{
os_error *error;
int x = scroll->visible.x1 - scroll->visible.x0 - 32;
int y = scroll->visible.y1 - scroll->visible.y0 - 32;
switch (scroll->xmin) {
case wimp_SCROLL_PAGE_LEFT:
scroll->xscroll -= x;
break;
case wimp_SCROLL_COLUMN_LEFT:
scroll->xscroll -= 100;
break;
case wimp_SCROLL_COLUMN_RIGHT:
scroll->xscroll += 100;
break;
case wimp_SCROLL_PAGE_RIGHT:
scroll->xscroll += x;
break;
default:
scroll->xscroll += (x * (scroll->xmin>>2)) >> 2;
break;
}
switch (scroll->ymin) {
case wimp_SCROLL_PAGE_UP:
scroll->yscroll += y;
break;
case wimp_SCROLL_LINE_UP:
scroll->yscroll += 100;
break;
case wimp_SCROLL_LINE_DOWN:
scroll->yscroll -= 100;
break;
case wimp_SCROLL_PAGE_DOWN:
scroll->yscroll -= y;
break;
default:
scroll->yscroll += (y * (scroll->ymin>>2)) >> 2;
break;
}
error = xwimp_open_window((wimp_open *) scroll);
if (error) {
LOG("xwimp_open_window: 0x%x: %s", error->errnum, error->errmess);
}
}
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