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netsurf/riscos/url_complete.c
John Mark Bell b82546a39f Probably fix crash on clicking in url completion dialogue. 
URL completion really needs revisiting, as it's full of side effects and has weird and wonderful interactions with other parts of the system.

svn path=/trunk/netsurf/; revision=3535
2007-08-29 00:27:52 +00:00

751 lines
21 KiB
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/*
* Copyright 2005 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
* GUI URL auto-completion (implementation).
*/
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "oslib/wimp.h"
#include "content/urldb.h"
#include "utils/log.h"
#include "riscos/global_history.h"
#include "riscos/gui.h"
#include "riscos/options.h"
#include "riscos/theme.h"
#include "riscos/url_complete.h"
#include "riscos/wimp.h"
#include "riscos/wimp_event.h"
#include "utils/utils.h"
#define MAXIMUM_VISIBLE_LINES 7
static const char **url_complete_matches = NULL;
static int url_complete_matches_allocated = 0;
static int url_complete_matches_available = 0;
static char *url_complete_matched_string = NULL;
static int url_complete_matches_selection = -1;
static int url_complete_keypress_selection = -1;
static wimp_w url_complete_parent = 0;
static bool url_complete_matches_reset = false;
static char *url_complete_original_url = NULL;
static bool url_complete_memory_exhausted = false;
static const char *url_complete_redraw[MAXIMUM_VISIBLE_LINES];
static char url_complete_icon_null[] = "\0";
static char url_complete_icon_sprite[12];
static wimp_icon url_complete_icon;
static wimp_icon url_complete_sprite;
static int mouse_x;
static int mouse_y;
static bool url_complete_callback(const char *url,
const struct url_data *data);
/**
* Should be called when the caret is placed into a URL completion icon.
*
* \param g the gui_window to initialise URL completion for
*/
void ro_gui_url_complete_start(struct gui_window *g)
{
char *url;
if ((!g->toolbar) || (!g->toolbar->display_url) ||
(g->window == url_complete_parent))
return;
ro_gui_url_complete_close(NULL, 0);
url = ro_gui_get_icon_string(g->toolbar->toolbar_handle,
ICON_TOOLBAR_URL);
url_complete_matched_string = strdup(url);
if (url_complete_matched_string)
url_complete_parent = g->window;
}
/**
* Handles a keypress for URL completion
*
* \param g the gui_window to update
* \param key the key pressed (as UTF32 code or wimp key + bit31 set)
* \return true to indicate keypress handled, false otherwise
*/
bool ro_gui_url_complete_keypress(struct gui_window *g, wchar_t key)
{
wimp_window_state state;
char *match_url;
char *url;
int i, lines;
int old_selection;
int height;
os_error *error;
bool currently_open;
/* we must have a toolbar/url bar */
if ((!g->toolbar) || (!g->toolbar->display_url) ||
(!option_url_suggestion)) {
ro_gui_url_complete_close(NULL, 0);
return false;
}
/* if we are currently active elsewhere, remove the previous window */
currently_open = ((g->window == url_complete_parent) &&
(url_complete_matches_available > 0));
if (g->window != url_complete_parent)
ro_gui_url_complete_close(NULL, 0);
/* forcibly open on down keys */
if ((!currently_open) && (url_complete_matched_string)) {
switch (key) {
case IS_WIMP_KEY | wimp_KEY_DOWN:
case IS_WIMP_KEY | wimp_KEY_PAGE_DOWN:
case IS_WIMP_KEY | wimp_KEY_CONTROL | wimp_KEY_DOWN:
free(url_complete_matched_string);
url_complete_matched_string = NULL;
}
}
/* get the text to match */
url_complete_parent = g->window;
url = ro_gui_get_icon_string(g->toolbar->toolbar_handle,
ICON_TOOLBAR_URL);
match_url = strdup(url);
if (!match_url) {
ro_gui_url_complete_close(NULL, 0);
return false;
}
/* if the text to match has changed then update it */
if ((!url_complete_matched_string) ||
(strcmp(match_url, url_complete_matched_string))) {
/* memorize the current matches */
lines = MAXIMUM_VISIBLE_LINES;
if (lines > url_complete_matches_available)
lines = url_complete_matches_available;
if (url_complete_matches)
for (i = 0; i < MAXIMUM_VISIBLE_LINES; i++)
url_complete_redraw[i] =
url_complete_matches[i];
/* our selection gets wiped */
error = xwimp_force_redraw(dialog_url_complete,
0,
-(url_complete_matches_selection + 1) * 44,
65536, -url_complete_matches_selection * 44);
if (error) {
LOG(("xwimp_force_redraw: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
}
/* clear our state */
free(url_complete_original_url);
free(url_complete_matched_string);
url_complete_matched_string = match_url;
url_complete_original_url = NULL;
url_complete_matches_available = 0;
url_complete_matches_selection = -1;
url_complete_keypress_selection = -1;
/* get some initial memory */
if (!url_complete_matches) {
url_complete_matches = malloc(64 * sizeof(char *));
if (!url_complete_matches) {
ro_gui_url_complete_close(NULL, 0);
return false;
}
url_complete_matches_allocated = 64;
}
/* find matches */
url_complete_memory_exhausted = false;
if (strlen(match_url) == 0)
urldb_iterate_entries(url_complete_callback);
else
urldb_iterate_partial(match_url, url_complete_callback);
if ((url_complete_memory_exhausted) ||
(url_complete_matches_available == 0)) {
ro_gui_url_complete_close(NULL, 0);
return false;
}
/* update the window */
state.w = g->window;
error = xwimp_get_window_state(&state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return false;
}
url_complete_matches_reset = true;
ro_gui_url_complete_resize(g, (wimp_open *)&state);
url_complete_matches_reset = false;
/* redraw the relevant bits of the window */
lines = MAXIMUM_VISIBLE_LINES;
if (lines > url_complete_matches_available)
lines = url_complete_matches_available;
for (i = 0; i < lines; i++) {
if (url_complete_redraw[i] !=
url_complete_matches[i]) {
error = xwimp_force_redraw(dialog_url_complete,
0, -(i + 1) * 44, 65536, -i * 44);
if (error) {
LOG(("xwimp_force_redraw: 0x%x: %s",
error->errnum,
error->errmess));
warn_user("WimpError",
error->errmess);
}
}
}
} else {
free(match_url);
}
/* handle keypresses */
if (!currently_open)
return false;
old_selection = url_complete_matches_selection;
switch (key) {
case IS_WIMP_KEY | wimp_KEY_UP:
url_complete_matches_selection--;
break;
case IS_WIMP_KEY | wimp_KEY_DOWN:
url_complete_matches_selection++;
break;
case IS_WIMP_KEY | wimp_KEY_PAGE_UP:
url_complete_matches_selection -=
MAXIMUM_VISIBLE_LINES;
break;
case IS_WIMP_KEY | wimp_KEY_PAGE_DOWN:
url_complete_matches_selection +=
MAXIMUM_VISIBLE_LINES;
break;
case IS_WIMP_KEY | wimp_KEY_CONTROL | wimp_KEY_UP:
url_complete_matches_selection = 0;
break;
case IS_WIMP_KEY | wimp_KEY_CONTROL | wimp_KEY_DOWN:
url_complete_matches_selection = 65536;
break;
}
if (url_complete_matches_selection >
url_complete_matches_available - 1)
url_complete_matches_selection =
url_complete_matches_available - 1;
else if (url_complete_matches_selection < -1)
url_complete_matches_selection = -1;
if (old_selection == url_complete_matches_selection)
return false;
error = xwimp_force_redraw(dialog_url_complete,
0, -(old_selection + 1) * 44,
65536, -old_selection * 44);
if (error) {
LOG(("xwimp_force_redraw: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
}
error = xwimp_force_redraw(dialog_url_complete,
0, -(url_complete_matches_selection + 1) * 44,
65536, -url_complete_matches_selection * 44);
if (error) {
LOG(("xwimp_force_redraw: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
}
if (old_selection == -1) {
free(url_complete_original_url);
url_complete_original_url = malloc(strlen(url) + 1);
if (!url_complete_original_url)
return false;
strcpy(url_complete_original_url, url);
}
if (url_complete_matches_selection == -1) {
ro_gui_set_icon_string(g->toolbar->toolbar_handle,
ICON_TOOLBAR_URL,
url_complete_original_url);
} else {
ro_gui_set_icon_string(g->toolbar->toolbar_handle,
ICON_TOOLBAR_URL,
url_complete_matches[
url_complete_matches_selection]);
free(url_complete_matched_string);
url_complete_matched_string = strdup(url_complete_matches[
url_complete_matches_selection]);
}
url_complete_keypress_selection = url_complete_matches_selection;
/* auto-scroll */
state.w = dialog_url_complete;
error = xwimp_get_window_state(&state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return true;
}
if (state.yscroll < -(url_complete_matches_selection * 44))
state.yscroll = -(url_complete_matches_selection * 44);
height = state.visible.y1 - state.visible.y0;
if (state.yscroll - height >
-((url_complete_matches_selection + 1) * 44))
state.yscroll =
-((url_complete_matches_selection + 1) * 44) + height;
error = xwimp_open_window((wimp_open *)(&state));
if (error) {
LOG(("xwimp_open_window: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return true;
}
return true;
}
/**
* Callback function for urldb_iterate_partial
*
* \param url URL which matches
* \param data Data associated with URL
* \return true to continue iteration, false otherwise
*/
bool url_complete_callback(const char *url, const struct url_data *data)
{
const char **array_extend;
/* Ignore unvisited URLs */
if (data->visits == 0)
return true;
url_complete_matches_available++;
if (url_complete_matches_available >
url_complete_matches_allocated) {
array_extend = (const char **)realloc(url_complete_matches,
(url_complete_matches_allocated + 64) *
sizeof(char *));
if (!array_extend) {
url_complete_memory_exhausted = true;
return false;
}
url_complete_matches = array_extend;
url_complete_matches_allocated += 64;
}
url_complete_matches[url_complete_matches_available - 1] = url;
return true;
}
/**
* Move and resize the url completion window to match the toolbar.
*
* \param g the gui_window to update
* \param open the wimp_open request (updated on exit)
*/
void ro_gui_url_complete_resize(struct gui_window *g, wimp_open *open)
{
os_box extent = { 0, 0, 0, 0 };
wimp_icon_state url_state;
wimp_window_state toolbar_state;
wimp_window_state state;
os_error *error;
int lines;
int scroll_v = 0;
/* only react to our window */
if (open->w != url_complete_parent)
return;
/* if there is no toolbar, or there is no URL bar shown,
* or there are no URL matches, close it */
if ((!g->toolbar) || (!g->toolbar->display_url) ||
(!url_complete_matches) ||
(url_complete_matches_available == 0)) {
ro_gui_url_complete_close(NULL, 0);
return;
}
/* get our current auto-complete window state for the scroll values */
state.w = dialog_url_complete;
error = xwimp_get_window_state(&state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return;
}
if (url_complete_matches_reset)
state.yscroll = 0;
/* move the window to the correct position */
toolbar_state.w = g->toolbar->toolbar_handle;
error = xwimp_get_window_state(&toolbar_state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return;
}
url_state.w = g->toolbar->toolbar_handle;
url_state.i = ICON_TOOLBAR_SURROUND;
error = xwimp_get_icon_state(&url_state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return;
}
lines = url_complete_matches_available;
extent.y0 = -(lines * 44);
extent.x1 = 65536;
error = xwimp_set_extent(dialog_url_complete, &extent);
if (error) {
LOG(("xwimp_set_extent: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return;
}
state.next = open->next;
state.flags &= ~wimp_WINDOW_VSCROLL;
state.flags &= ~(4095 << 16); /* clear bits 16-27 */
if (lines > MAXIMUM_VISIBLE_LINES) {
lines = MAXIMUM_VISIBLE_LINES;
scroll_v = ro_get_vscroll_width(NULL) - 2;
state.flags |= wimp_WINDOW_VSCROLL;
}
state.visible.x0 = open->visible.x0 + 2 + url_state.icon.extent.x0;
state.visible.x1 = open->visible.x0 - 2 +
url_state.icon.extent.x1 - scroll_v;
state.visible.y1 = open->visible.y1 - url_state.icon.extent.y1 + 2;
state.visible.y0 = state.visible.y1 - (lines * 44);
if (state.visible.x1 + scroll_v > toolbar_state.visible.x1)
state.visible.x1 = toolbar_state.visible.x1 - scroll_v;
if (state.visible.x1 - state.visible.x0 < 0) {
error = xwimp_close_window(dialog_url_complete);
if (error) {
LOG(("xwimp_close_window: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
}
} else {
error = xwimp_open_window_nested_with_flags(&state,
(wimp_w)-1, 0);
if (error) {
LOG(("xwimp_open_window: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return;
}
open->next = dialog_url_complete;
}
}
/**
* Try to close the current url completion window
*
* \param g the gui_window the user clicked on (or NULL to forcibly close)
* \param i the icon the user clicked on to prompt the close
* \return whether the window was closed
*/
bool ro_gui_url_complete_close(struct gui_window *g, wimp_i i)
{
os_error *error;
bool currently_open;
if ((g && (i == ICON_TOOLBAR_URL) &&
(g->window == url_complete_parent)))
return false;
currently_open = ((url_complete_parent) &&
(url_complete_matches_available > 0));
free(url_complete_matches);
free(url_complete_matched_string);
free(url_complete_original_url);
url_complete_matches = NULL;
url_complete_matched_string = NULL;
url_complete_original_url = NULL;
url_complete_matches_allocated = 0;
url_complete_matches_available = 0;
url_complete_keypress_selection = -1;
url_complete_matches_selection = -1;
url_complete_parent = 0;
error = xwimp_close_window(dialog_url_complete);
if (error) {
LOG(("xwimp_close_window: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
}
return currently_open;
}
/**
* Redraws a section of the URL completion window
*
* \param redraw the area to redraw
*/
void ro_gui_url_complete_redraw(wimp_draw *redraw)
{
osbool more;
os_error *error;
int clip_y0, clip_y1, origin_y;
int first_line, last_line, line;
const struct url_data *data;
int type;
/* initialise our icon */
url_complete_icon.flags = wimp_ICON_INDIRECTED | wimp_ICON_VCENTRED |
wimp_ICON_TEXT | wimp_ICON_FILLED |
(wimp_COLOUR_BLACK << wimp_ICON_FG_COLOUR_SHIFT) |
(wimp_COLOUR_WHITE << wimp_ICON_BG_COLOUR_SHIFT);
url_complete_icon.extent.x0 = 50;
url_complete_icon.extent.x1 = 16384;
url_complete_icon.data.indirected_text.validation =
url_complete_icon_null;
url_complete_sprite.flags = wimp_ICON_TEXT | wimp_ICON_SPRITE |
wimp_ICON_INDIRECTED | wimp_ICON_FILLED |
wimp_ICON_HCENTRED | wimp_ICON_VCENTRED;
url_complete_sprite.extent.x0 = 0;
url_complete_sprite.extent.x1 = 50;
url_complete_sprite.data.indirected_text.text =
url_complete_icon_null;
url_complete_sprite.data.indirected_text.validation =
url_complete_icon_sprite;
url_complete_sprite.data.indirected_text.size = 1;
/* no matches? no redraw */
if (!url_complete_matches) {
LOG(("Attempt to redraw with no matches made"));
ro_gui_user_redraw(redraw, false, NULL);
return;
}
/* redraw */
more = wimp_redraw_window(redraw);
while (more) {
origin_y = redraw->box.y1 - redraw->yscroll;
clip_y0 = redraw->clip.y0 - origin_y;
clip_y1 = redraw->clip.y1 - origin_y;
first_line = (-clip_y1) / 44;
last_line = (-clip_y0 + 43) / 44;
for (line = first_line; line < last_line; line++) {
if (line == url_complete_matches_selection)
url_complete_icon.flags |=
wimp_ICON_SELECTED;
else
url_complete_icon.flags &=
~wimp_ICON_SELECTED;
url_complete_icon.extent.y1 = -line * 44;
url_complete_icon.extent.y0 = -(line + 1) * 44;
url_complete_icon.data.indirected_text.text =
url_complete_matches[line];
url_complete_icon.data.indirected_text.size =
strlen(url_complete_matches[line]);
error = xwimp_plot_icon(&url_complete_icon);
if (error) {
LOG(("xwimp_plot_icon: 0x%x: %s",
error->errnum,
error->errmess));
warn_user("WimpError", error->errmess);
}
data = urldb_get_url_data(url_complete_matches[line]);
if (data)
type = ro_content_filetype_from_type(
data->type);
else
type = 0;
sprintf(url_complete_icon_sprite, "Ssmall_%.3x",
type);
if (!ro_gui_wimp_sprite_exists(
url_complete_icon_sprite + 1))
sprintf(url_complete_icon_sprite,
"Ssmall_xxx");
url_complete_sprite.extent.y1 = -line * 44;
url_complete_sprite.extent.y0 = -(line + 1) * 44;
error = xwimp_plot_icon(&url_complete_sprite);
if (error) {
LOG(("xwimp_plot_icon: 0x%x: %s",
error->errnum,
error->errmess));
warn_user("WimpError", error->errmess);
}
}
more = wimp_get_rectangle(redraw);
}
}
/**
* Handle mouse movement over the URL completion window.
*
* \param pointer the pointer state
*/
void ro_gui_url_complete_mouse_at(wimp_pointer *pointer)
{
wimp_mouse_state current;
current = pointer->buttons;
pointer->buttons = 0;
ro_gui_url_complete_click(pointer);
pointer->buttons = current;
}
/**
* Handle mouse clicks in the URL completion window.
*
* \param pointer the pointer state
* \return whether the click was handled
*/
bool ro_gui_url_complete_click(wimp_pointer *pointer)
{
wimp_window_state state;
os_error *error;
int selection, old_selection;
struct gui_window *g;
char *url;
if ((mouse_x == pointer->pos.x) && (mouse_y == pointer->pos.y) &&
(!pointer->buttons))
return false;
mouse_x = pointer->pos.x;
mouse_y = pointer->pos.y;
state.w = dialog_url_complete;
error = xwimp_get_window_state(&state);
if (error) {
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
return false;
}
selection = (state.visible.y1 - pointer->pos.y - state.yscroll) / 44;
if (selection != url_complete_matches_selection) {
if (url_complete_matches_selection == -1) {
g = ro_gui_window_lookup(url_complete_parent);
if (!g)
return false;
url = ro_gui_get_icon_string(
g->toolbar->toolbar_handle,
ICON_TOOLBAR_URL);
free(url_complete_original_url);
url_complete_original_url = malloc(strlen(url) + 1);
if (!url_complete_original_url)
return false;
strcpy(url_complete_original_url, url);
}
old_selection = url_complete_matches_selection;
url_complete_matches_selection = selection;
error = xwimp_force_redraw(dialog_url_complete,
0, -(old_selection + 1) * 44,
65536, -old_selection * 44);
if (error) {
LOG(("xwimp_force_redraw: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
}
error = xwimp_force_redraw(dialog_url_complete,
0, -(url_complete_matches_selection + 1) * 44,
65536, -url_complete_matches_selection * 44);
if (error) {
LOG(("xwimp_force_redraw: 0x%x: %s",
error->errnum, error->errmess));
warn_user("WimpError", error->errmess);
}
}
if (!pointer->buttons)
return true;
/* find owning window */
g = ro_gui_window_lookup(url_complete_parent);
if (!g)
return false;
/* Select sets the text and launches */
if (pointer->buttons == wimp_CLICK_SELECT) {
ro_gui_set_icon_string(g->toolbar->toolbar_handle,
ICON_TOOLBAR_URL,
url_complete_matches[
url_complete_matches_selection]);
global_history_add_recent(url_complete_matches[
url_complete_matches_selection]);
/** \todo The interaction of components here is hideous */
/* Do NOT make any attempt to use any of the global url
* completion variables after this call to browser_window_go.
* They will be invalidated by (at least):
* + gui_window_set_url
* + destruction of (i)frames within the current page
* Any attempt to use them will probably result in a crash.
*/
browser_window_go(g->bw,
url_complete_matches[
url_complete_matches_selection],
0, true);
ro_gui_url_complete_close(NULL, 0);
/* Adjust just sets the text */
} else if (pointer->buttons == wimp_CLICK_ADJUST) {
ro_gui_set_icon_string(g->toolbar->toolbar_handle,
ICON_TOOLBAR_URL,
url_complete_matches[
url_complete_matches_selection]);
ro_gui_url_complete_keypress(g, 0);
}
return true;
}
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