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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2018 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <stdio.h>
#include "scr.h"
#include "scr_menu.h"
#include "brl_cmds.h"
#include "cmd_queue.h"
#include "alert.h"
#include "charset.h"
typedef struct {
MenuItem *item;
size_t length;
size_t settingIndent;
wchar_t text[0];
} RenderedMenuItem;
static int screenUpdated;
static RenderedMenuItem **screenLines;
static unsigned int lineCount;
static unsigned int screenHeight;
static Menu *screenMenu;
static unsigned int screenColumn;
static unsigned int screenRow;
static inline const MenuItem *
getCurrentItem (void) {
Menu *menu = screenMenu;
return getMenuItem(menu, getMenuIndex(menu));
static inline void
setFocusedItem (void) {
changeMenuItem(screenLines[ses->winy]->item);
static RenderedMenuItem *
newRenderedMenuItem (Menu *menu) {
MenuItem *item = getCurrentMenuItem(menu);
char labelString[0X100];
size_t labelLength;
const char *title = getMenuItemTitle(item);
const char *subtitle = getMenuItemSubtitle(item);
STR_BEGIN(labelString, ARRAY_COUNT(labelString));
if (*subtitle) {
if (*title) STR_PRINTF(" ");
STR_PRINTF("%s", subtitle);
}
if (labelString[0]) {
if (!isMenuItemAction(item)) STR_PRINTF(":");
STR_PRINTF(" ");
}
char settingString[0X100];
size_t settingLength;
const char *text = getMenuItemText(item);
const char *comment = getMenuItemComment(item);
if (!text) {
text = "";
} else if (!*text) {
text = gettext("<off>");
}
STR_BEGIN(settingString, ARRAY_COUNT(settingString));
if (*comment) STR_PRINTF(" (%s)", comment);
size_t maximumLength = labelLength + settingLength;
wchar_t characters[maximumLength];
size_t settingIndent;
size_t actualLength;
{
size_t currentLength = 0;
currentLength += convertTextToWchars(&characters[currentLength], labelString, maximumLength-currentLength);
settingIndent = currentLength;
currentLength += convertTextToWchars(&characters[currentLength], settingString, maximumLength-currentLength);
actualLength = currentLength;
}
{
RenderedMenuItem *rmi;
size_t size = sizeof(*rmi) + (actualLength * sizeof(rmi->text[0]));
if ((rmi = malloc(size))) {
memset(rmi, 0, sizeof(*rmi));
wmemcpy(rmi->text, characters, actualLength);
rmi->item = item;
rmi->length = actualLength;
rmi->settingIndent = settingIndent;
return rmi;
} else {
logMallocError();
}
}
return NULL;
}
static void
destroyRenderedMenuItem (RenderedMenuItem *rmi) {
free(rmi);
removeLines (void) {
while (screenHeight > 0) {
destroyRenderedMenuItem(screenLines[--screenHeight]);
}
}
static int
setScreenRow (void) {
const MenuItem *item = getCurrentItem();
for (unsigned int row=0; row<screenHeight; row+=1) {
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const RenderedMenuItem *rmi = screenLines[row];
if (rmi->item == item) {
screenRow = row;
return 1;
}
}
return 0;
}
static int
reloadScreen (int constructing) {
Menu *menu = getCurrentSubmenu(rootMenu);
unsigned int index = getMenuIndex(menu);
screenMenu = menu;
screenWidth = 0;
removeLines();
if (changeMenuItemFirst(menu)) {
{
unsigned int count = getMenuSize(menu);
if (count > lineCount) {
RenderedMenuItem **lines = realloc(screenLines, ARRAY_SIZE(screenLines, count));
if (!lines) {
logMallocError();
return 0;
}
screenLines = lines;
lineCount = count;
}
}
do {
RenderedMenuItem *rmi = newRenderedMenuItem(menu);
if (!rmi) return 0;
screenLines[screenHeight++] = rmi;
if (screenWidth < rmi->length) screenWidth = rmi->length;
} while (changeMenuItemNext(menu, 0));
if (changeMenuItemIndex(menu, index)) {
if (constructing) {
screenRow = 0;
screenColumn = 0;
} else {
if (!setScreenRow()) return 0;
screenColumn = screenLines[screenRow]->settingIndent;
}
return 1;
}
}
return 0;
}
static int
refresh_MenuScreen (void) {
if (screenUpdated) {
if (!reloadScreen(0)) return 0;
screenUpdated = 0;
}
}
static int
construct_MenuScreen (Menu *menu) {
rootMenu = menu;
screenUpdated = 0;
screenLines = NULL;
lineCount = 0;
screenHeight = 0;
return reloadScreen(1);
}
static void
destruct_MenuScreen (void) {
if (screenLines) {
removeLines();
free(screenLines);
screenLines = NULL;
}
rootMenu = NULL;
}
static int
currentVirtualTerminal_MenuScreen (void) {
return userVirtualTerminal(2 + getMenuNumber(screenMenu));
static const char *
getTitle_MenuScreen (void) {
return gettext("Preferences Menu");
}
static void
describe_MenuScreen (ScreenDescription *description) {
description->cols = MAX(screenWidth, 1);
description->rows = MAX(screenHeight, 1);
description->posx = screenColumn;
description->posy = screenRow;
description->number = currentVirtualTerminal_MenuScreen();
}
static int
readCharacters_MenuScreen (const ScreenBox *box, ScreenCharacter *buffer) {
if (validateScreenBox(box, screenWidth, screenHeight)) {
ScreenCharacter *character = buffer;
for (unsigned int row=0; row<box->height; row+=1) {
const RenderedMenuItem *rmi = screenLines[row + box->top];
for (unsigned int column=0; column<box->width; column+=1) {
unsigned int index = column + box->left;
character->text = (index < rmi->length)? rmi->text[index]: WC_C(' ');
character->attributes = SCR_COLOUR_DEFAULT;
}
}
return 1;
}
return 0;
}
static void
commandRejected (void) {
}
static void
itemChanged (void) {
setScreenRow();
screenColumn = 0;
}
static void
settingChanged (void) {
handleCommand_MenuScreen (int command) {
switch (command) {
case BRL_CMD_KEY(BACKSPACE):
case BRL_CMD_MENU_PREV_LEVEL: {
Menu *menu = screenMenu;
if (menu != rootMenu) {
if (!changeMenuItemIndex(screenMenu, 0)) {
commandRejected();
} else if (!changeMenuSettingNext(menu, 0)) {
commandRejected();
} else {
setFocusedItem();
settingChanged();
}
case BRL_CMD_KEY(ESCAPE):
case BRL_CMD_KEY(ENTER): {
int handled = handleCommand(BRL_CMD_PREFMENU);
if (handled) setFocusedItem();
return handled;
}
case BRL_CMD_KEY(HOME): {
int handled = handleCommand(BRL_CMD_PREFLOAD);
if (handled) settingChanged();
return handled;
case BRL_CMD_KEY(END): {
int handled = handleCommand(BRL_CMD_PREFSAVE);
if (handled) setFocusedItem();
return handled;
}
case BRL_CMD_KEY(PAGE_UP):
case BRL_CMD_MENU_FIRST_ITEM: {
if (changeMenuItemFirst(screenMenu)) {
itemChanged();
} else {
commandRejected();
}
case BRL_CMD_KEY(PAGE_DOWN):
case BRL_CMD_MENU_LAST_ITEM: {
if (changeMenuItemLast(screenMenu)) {
itemChanged();
} else {
commandRejected();
}
case BRL_CMD_KEY(CURSOR_UP):
case BRL_CMD_MENU_PREV_ITEM: {
if (changeMenuItemPrevious(screenMenu, 1)) {
itemChanged();
} else {
commandRejected();
}
case BRL_CMD_KEY(CURSOR_DOWN):
case BRL_CMD_MENU_NEXT_ITEM: {
if (changeMenuItemNext(screenMenu, 1)) {
itemChanged();
} else {
commandRejected();
}
case BRL_CMD_MENU_PREV_SETTING: {
setFocusedItem();
if (changeMenuSettingPrevious(screenMenu, 1)) {
settingChanged();
} else {
commandRejected();
}
case BRL_CMD_KEY(CURSOR_RIGHT):
case BRL_CMD_HOME:
case BRL_CMD_RETURN:
case BRL_CMD_MENU_NEXT_SETTING: {
setFocusedItem();
if (changeMenuSettingNext(screenMenu, 1)) {
settingChanged();
} else {
commandRejected();
}
return 1;
}
case BRL_CMD_CSRJMP_VERT: {
setFocusedItem();
}
default: {
if ((command & BRL_MSK_BLK) == BRL_CMD_BLK(ROUTE)) {
unsigned int key = command & BRL_MSK_ARG;
unsigned int count = brl.textColumns;
if (key < count) {
setFocusedItem();
if (changeMenuSettingScaled(screenMenu, key, count)) {
settingChanged();
} else {
commandRejected();
}
} else if ((key >= statusStart) && (key < (statusStart + statusCount))) {
switch (key - statusStart) {
default:
commandRejected();
break;
}
} else {
commandRejected();
}
return 1;
}
break;
}
return 0;
}
static KeyTableCommandContext
getCommandContext_MenuScreen (void) {
return KTB_CTX_MENU;
}
void
initializeMenuScreen (MenuScreen *menu) {
initializeBaseScreen(&menu->base);
menu->base.currentVirtualTerminal = currentVirtualTerminal_MenuScreen;
menu->base.refresh = refresh_MenuScreen;
menu->base.describe = describe_MenuScreen;
menu->base.readCharacters = readCharacters_MenuScreen;
menu->base.handleCommand = handleCommand_MenuScreen;
menu->base.getCommandContext = getCommandContext_MenuScreen;
menu->construct = construct_MenuScreen;
menu->destruct = destruct_MenuScreen;
}