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netsurf/riscos/gui/status_bar.c
John Mark Bell 4a950fcbf7 Only run the scheduler on null poll events. 
Ensure the status bar widget treats its text as const.

Fix erroneous free of status bar text in status bar widget destructor. 
The status bar text is now owned by the core.

Schedule a callback to request a redraw from the Wimp when setting status bar 
text. The previous approach could lead to the Wimp having a long queue of 
redraw events to issue to us, thus preventing any other application being 
scheduled.

The above changes are based on a patch from Rik Griffin.

svn path=/trunk/netsurf/; revision=10126
2010-03-10 22:47:37 +00:00

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/*
* Copyright 2006 Richard Wilson <info@tinct.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
* UTF8 status bar (implementation).
*/
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include "swis.h"
#include "oslib/colourtrans.h"
#include "oslib/os.h"
#include "oslib/wimp.h"
#include "oslib/wimpspriteop.h"
#include "desktop/plotters.h"
#include "utils/log.h"
#include "utils/utils.h"
#include "riscos/gui.h"
#include "riscos/wimp.h"
#include "riscos/wimp_event.h"
#include "riscos/wimputils.h"
#include "riscos/gui/progress_bar.h"
#include "riscos/gui/status_bar.h"
#define ICON_WIDGET 0
#define WIDGET_WIDTH 12
#define PROGRESS_WIDTH 160
struct status_bar {
wimp_w w; /**< status bar window handle */
wimp_w parent; /**< parent window handle */
const char *text; /**< status bar text */
struct progress_bar *pb; /**< progress bar */
unsigned int scale; /**< current status bar scale */
int width; /**< current status bar width */
bool visible; /**< status bar is visible? */
};
static char status_widget_text[] = "";
static char status_widget_validation[] = "R5;Pptr_lr,8,6";
wimp_WINDOW(1) status_bar_definition = {
{0, 0, 1, 1},
0,
0,
wimp_TOP,
wimp_WINDOW_NEW_FORMAT | wimp_WINDOW_MOVEABLE |
wimp_WINDOW_FURNITURE_WINDOW |
wimp_WINDOW_IGNORE_XEXTENT,
wimp_COLOUR_BLACK,
wimp_COLOUR_LIGHT_GREY,
wimp_COLOUR_LIGHT_GREY,
wimp_COLOUR_VERY_LIGHT_GREY,
wimp_COLOUR_DARK_GREY,
wimp_COLOUR_MID_LIGHT_GREY,
wimp_COLOUR_CREAM,
wimp_WINDOW_NEVER3D | 0x16u /* RISC OS 5.03+ */,
{0, 0, 65535, 65535},
0,
0,
wimpspriteop_AREA,
1,
1,
{""},
1,
{
{
{0, 0, 1, 1},
wimp_ICON_TEXT | wimp_ICON_INDIRECTED |
wimp_ICON_BORDER | wimp_ICON_FILLED |
(wimp_COLOUR_LIGHT_GREY <<
wimp_ICON_BG_COLOUR_SHIFT) |
(wimp_BUTTON_CLICK_DRAG <<
wimp_ICON_BUTTON_TYPE_SHIFT),
{
.indirected_text = {
status_widget_text,
status_widget_validation,
1
}
}
}
}
};
static void ro_gui_status_bar_open(wimp_open *open);
static bool ro_gui_status_bar_click(wimp_pointer *pointer);
static void ro_gui_status_bar_redraw(wimp_draw *redraw);
static void ro_gui_status_bar_redraw_callback(void *handle);
static void ro_gui_status_position_progress_bar(struct status_bar *sb);
/**
* Create a new status bar
*
* \param parent the window to contain the status bar
* \param width the proportional width to use (0...10,000)
*/
struct status_bar *ro_gui_status_bar_create(wimp_w parent, unsigned int width)
{
struct status_bar *sb;
os_error *error;
sb = calloc(1, sizeof(*sb));
if (!sb)
return NULL;
sb->pb = ro_gui_progress_bar_create();
if (!sb->pb)
return NULL;
error = xwimp_create_window((wimp_window *)&status_bar_definition,
&sb->w);
if (error) {
LOG(("xwimp_create_window: 0x%x: %s",
error->errnum, error->errmess));
free(sb);
return NULL;
}
sb->parent = parent;
sb->scale = width;
sb->visible = true;
ro_gui_wimp_event_set_user_data(sb->w, sb);
ro_gui_wimp_event_register_open_window(sb->w,
ro_gui_status_bar_open);
ro_gui_wimp_event_register_mouse_click(sb->w,
ro_gui_status_bar_click);
ro_gui_wimp_event_register_redraw_window(sb->w,
ro_gui_status_bar_redraw);
ro_gui_wimp_event_set_help_prefix(sb->w, "HelpStatus");
ro_gui_status_bar_resize(sb);
return sb;
}
/**
* Destroy a status bar and free all associated resources
*
* \param sb the status bar to destroy
*/
void ro_gui_status_bar_destroy(struct status_bar *sb)
{
os_error *error;
assert(sb);
ro_gui_wimp_event_finalise(sb->w);
error = xwimp_delete_window(sb->w);
if (error) {
LOG(("xwimp_delete_window: 0x%x:%s",
error->errnum, error->errmess));
}
ro_gui_progress_bar_destroy(sb->pb);
/* Remove any scheduled redraw callbacks */
schedule_remove(ro_gui_status_bar_redraw_callback, (void *) sb);
free(sb);
}
/**
* Get the handle of the window that represents a status bar
*
* \param sb the status bar to get the window handle of
* \return the status bar's window handle
*/
wimp_w ro_gui_status_bar_get_window(struct status_bar *sb)
{
assert(sb);
return sb->w;
}
/**
* Get the proportional width the status bar is currently using
*
* \param sb the status bar to get the width of
* \return the status bar's width (0...10,000)
*/
unsigned int ro_gui_status_bar_get_width(struct status_bar *sb)
{
assert(sb);
return sb->scale;
}
/**
* Set the visibility status of the status bar
*
* \param sb the status bar to check the visiblity of
* \return whether the status bar is visible
*/
void ro_gui_status_bar_set_visible(struct status_bar *sb, bool visible)
{
os_error *error;
assert(sb);
sb->visible = visible;
if (visible) {
ro_gui_status_bar_resize(sb);
} else {
error = xwimp_close_window(sb->w);
if (error) {
LOG(("xwimp_close_window: 0x%x:%s",
error->errnum, error->errmess));
}
}
}
/**
* Get the visibility status of the status bar
*
* \param sb the status bar to check the visiblity of
* \return whether the status bar is visible
*/
bool ro_gui_status_bar_get_visible(struct status_bar *sb)
{
assert(sb);
return sb->visible;
}
/**
* Set the value of the progress bar
*
* \param pb the status bar to set the progress of
* \param value the value to use
*/
void ro_gui_status_bar_set_progress_value(struct status_bar *sb,
unsigned int value)
{
assert(sb);
ro_gui_status_bar_set_progress_range(sb,
max(value, ro_gui_progress_bar_get_range(sb->pb)));
ro_gui_progress_bar_set_value(sb->pb, value);
}
/**
* Set the range of the progress bar
*
* \param pb the status bar to set the range of
* \param value the value to use, or 0 to turn off the progress bar
*/
void ro_gui_status_bar_set_progress_range(struct status_bar *sb,
unsigned int range)
{
unsigned int old_range;
os_error *error;
assert(sb);
old_range = ro_gui_progress_bar_get_range(sb->pb);
ro_gui_progress_bar_set_range(sb->pb, range);
LOG(("Ranges are %i vs %i", old_range, range));
if ((old_range == 0) && (range != 0)) {
ro_gui_status_position_progress_bar(sb);
} else if ((old_range != 0) && (range == 0)) {
error = xwimp_close_window(
ro_gui_progress_bar_get_window(sb->pb));
if (error) {
LOG(("xwimp_close_window: 0x%x:%s",
error->errnum, error->errmess));
}
}
}
/**
* Set the icon for the progress bar
*
* \param pb the status bar to set the icon for
* \param icon the icon to use, or NULL for no icon
*/
void ro_gui_status_bar_set_progress_icon(struct status_bar *sb,
const char *icon)
{
assert(sb);
ro_gui_progress_bar_set_icon(sb->pb, icon);
}
/**
* Set the text to display in the status bar
*
* \param text the UTF8 text to display, or NULL for none
*/
void ro_gui_status_bar_set_text(struct status_bar *sb, const char *text)
{
assert(sb);
sb->text = text;
/* Schedule a window redraw for 1cs' time.
*
* We do this to ensure that redraws as a result of text changes
* do not prevent other applications obtaining CPU time.
*
* The scheduled callback will be run when we receive the first
* null poll after 1cs has elapsed. It may then issue a redraw
* request to the Wimp.
*
* The scheduler ensures that only one instance of the
* { callback, handle } pair is registered at once.
*/
if (sb->visible && text != NULL) {
schedule(1, ro_gui_status_bar_redraw_callback, (void *) sb);
}
}
/**
* Resize a status bar following a change in the dimensions of the
* parent window.
*
* \param sb the status bar to resize
*/
void ro_gui_status_bar_resize(struct status_bar *sb)
{
int window_width, window_height;
int status_width, status_height;
int redraw_left, redraw_right;
wimp_window_state state;
os_error *error;
os_box extent;
if ((!sb) || (!sb->visible))
return;
/* get the window work area dimensions */
state.w = sb->parent;
error = xwimp_get_window_state(&state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
return;
}
window_width = state.visible.x1 - state.visible.x0;
window_height = state.visible.y1 - state.visible.y0;
/* recalculate the scaled width */
status_width = (window_width * sb->scale) / 10000;
if (status_width < WIDGET_WIDTH)
status_width = WIDGET_WIDTH;
status_height = ro_get_hscroll_height(sb->parent);
/* resize the status/resize icons */
if (status_width != sb->width) {
/* update the window extent */
extent.x0 = 0;
extent.y0 = 0;
extent.x1 = status_width;
extent.y1 = status_height - 4;
error = xwimp_set_extent(sb->w, &extent);
if (error) {
LOG(("xwimp_set_extent: 0x%x: %s",
error->errnum, error->errmess));
return;
}
/* re-open the nested window */
state.w = sb->w;
state.xscroll = 0;
state.yscroll = 0;
state.next = wimp_TOP;
state.visible.x0 = state.visible.x0;
state.visible.y1 = state.visible.y0 - 2;
state.visible.x1 = state.visible.x0 + status_width;
state.visible.y0 = state.visible.y1 - status_height + 4;
error = xwimp_open_window_nested(PTR_WIMP_OPEN(&state),
sb->parent,
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_XORIGIN_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_YORIGIN_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_LS_EDGE_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_BS_EDGE_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_RS_EDGE_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_TS_EDGE_SHIFT);
if (error) {
LOG(("xwimp_open_window_nested: 0x%x: %s",
error->errnum, error->errmess));
return;
}
ro_gui_status_position_progress_bar(sb);
error = xwimp_resize_icon(sb->w, ICON_WIDGET,
status_width - WIDGET_WIDTH, 0,
status_width, status_height - 4);
if (error) {
LOG(("xwimp_resize_icon: 0x%x: %s",
error->errnum, error->errmess));
return;
}
redraw_left = min(status_width, sb->width) - WIDGET_WIDTH - 2;
redraw_right = max(status_width, sb->width);
xwimp_force_redraw(sb->w, redraw_left, 0,
redraw_right, status_height);
sb->width = status_width;
}
}
/**
* Process a WIMP redraw request
*
* \param redraw the redraw request to process
*/
void ro_gui_status_bar_redraw(wimp_draw *redraw)
{
struct status_bar *sb;
os_error *error;
osbool more;
rufl_code code;
sb = (struct status_bar *)ro_gui_wimp_event_get_user_data(redraw->w);
assert(sb);
/* initialise the plotters */
plot = ro_plotters;
ro_plot_set_scale(1.0);
ro_plot_origin_x = 0;
ro_plot_origin_y = 0;
/* redraw the window */
error = xwimp_redraw_window(redraw, &more);
if (error) {
LOG(("xwimp_redraw_window: 0x%x: %s",
error->errnum, error->errmess));
return;
}
while (more) {
/* redraw the status text */
if (sb->text) {
error = xcolourtrans_set_font_colours(font_CURRENT,
0xeeeeee00, 0x00000000, 14, 0, 0, 0);
if (error) {
LOG(("xcolourtrans_set_font_colours: 0x%x: %s",
error->errnum, error->errmess));
return;
}
code = rufl_paint(ro_gui_desktop_font_family,
ro_gui_desktop_font_style,
ro_gui_desktop_font_size,
sb->text, strlen(sb->text),
redraw->box.x0 + 6, redraw->box.y0 + 8,
rufl_BLEND_FONT);
if (code != rufl_OK) {
if (code == rufl_FONT_MANAGER_ERROR)
LOG(("rufl_FONT_MANAGER_ERROR: 0x%x: %s",
rufl_fm_error->errnum,
rufl_fm_error->errmess));
else
LOG(("rufl_paint: 0x%x", code));
}
}
/* separate the widget from the text with a line */
plot.rectangle((redraw->box.x0 + sb->width - WIDGET_WIDTH - 2) >> 1,
-redraw->box.y0 >> 1,
(redraw->box.x0 + sb->width - WIDGET_WIDTH) >> 1,
-redraw->box.y1 >> 1,
plot_style_fill_black);
error = xwimp_get_rectangle(redraw, &more);
if (error) {
LOG(("xwimp_get_rectangle: 0x%x: %s",
error->errnum, error->errmess));
return;
}
}
}
/**
* Callback for scheduled redraw
*
* \param handle Callback handle
*/
void ro_gui_status_bar_redraw_callback(void *handle)
{
struct status_bar *sb = handle;
wimp_force_redraw(sb->w, 0, 0, sb->width - WIDGET_WIDTH, 65536);
}
/**
* Process an mouse_click event for a status window.
*
* \param pointer details of the mouse click
*/
bool ro_gui_status_bar_click(wimp_pointer *pointer)
{
wimp_drag drag;
os_error *error;
switch (pointer->i) {
case ICON_WIDGET:
gui_current_drag_type = GUI_DRAG_STATUS_RESIZE;
drag.w = pointer->w;
drag.type = wimp_DRAG_SYSTEM_SIZE;
drag.initial.x0 = pointer->pos.x;
drag.initial.x1 = pointer->pos.x;
drag.initial.y0 = pointer->pos.y;
drag.initial.y1 = pointer->pos.y;
error = xwimp_drag_box(&drag);
if (error) {
LOG(("xwimp_drag_box: 0x%x: %s",
error->errnum, error->errmess));
}
break;
}
return true;
}
/**
* Process an open_window request for a status window.
*
* \param open the request to process
*/
void ro_gui_status_bar_open(wimp_open *open)
{
struct status_bar *sb;
int window_width, status_width;
wimp_window_state state;
os_error *error;
/* get the parent width for scaling */
sb = (struct status_bar *)ro_gui_wimp_event_get_user_data(open->w);
state.w = sb->parent;
error = xwimp_get_window_state(&state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
return;
}
window_width = state.visible.x1 - state.visible.x0;
if (window_width == 0)
window_width = 1;
status_width = open->visible.x1 - open->visible.x0;
if (status_width <= 12)
status_width = 0;
/* store the new size */
sb->scale = (10000 * status_width) / window_width;
if (sb->scale > 10000)
sb->scale = 10000;
ro_gui_status_bar_resize(sb);
}
/**
* Reposition the progress component following a change in the
* dimension of the status window.
*
* \param sb the status bar to update
*/
void ro_gui_status_position_progress_bar(struct status_bar *sb)
{
wimp_window_state state;
os_error *error;
int left, right;
if (!sb)
return;
if (ro_gui_progress_bar_get_range(sb->pb) == 0)
return;
/* get the window work area dimensions */
state.w = sb->w;
error = xwimp_get_window_state(&state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
return;
}
/* calculate the dimensions */
right = state.visible.x1 - WIDGET_WIDTH - 2;
left = max(state.visible.x0, right - PROGRESS_WIDTH);
/* re-open the nested window */
state.w = ro_gui_progress_bar_get_window(sb->pb);
state.xscroll = 0;
state.yscroll = 0;
state.next = wimp_TOP;
state.visible.x0 = left;
state.visible.x1 = right;
error = xwimp_open_window_nested(PTR_WIMP_OPEN(&state),
sb->w,
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_XORIGIN_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_YORIGIN_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_LS_EDGE_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_BS_EDGE_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_RS_EDGE_SHIFT |
wimp_CHILD_LINKS_PARENT_VISIBLE_BOTTOM_OR_LEFT
<< wimp_CHILD_TS_EDGE_SHIFT);
if (error) {
LOG(("xwimp_open_window: 0x%x: %s",
error->errnum, error->errmess));
}
/* update the progress bar display on non-standard width */
if ((right - left) != PROGRESS_WIDTH)
ro_gui_progress_bar_update(sb->pb, right - left,
state.visible.y1 - state.visible.y0);
}
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