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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2004 The ScummVM project
*
* This program 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; either version 2
* of the License, or (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#include "stdafx.h"
#include "gui/console.h"
#include "gui/ScrollBarWidget.h"
#include "base/engine.h"
#include "base/version.h"
#include "graphics/font.h"
#define kCharWidth g_guifont.getMaxCharWidth()
namespace GUI {
#define PROMPT ") "
/* TODO:
* - it is very inefficient to redraw the full thingy when just one char is added/removed.
* Instead, we could just copy the GFX of the blank console (i.e. after the transparent
* background is drawn, before any text is drawn). Then using that, it becomes trivial
* to erase a single character, do scrolling etc.
* - a *lot* of others things, this code is in no way complete and heavily under progress
*/
ConsoleDialog::ConsoleDialog(float widthPercent, float heightPercent)
: Dialog(0, 0, 1, 1),
_widthPercent(widthPercent), _heightPercent(heightPercent) {
// Setup basic layout/dialog size
reflowLayout();
memset(_buffer, ' ', kBufferSize);
_linesInBuffer = kBufferSize / _lineWidth;
_currentPos = 0;
_scrollLine = _linesPerPage - 1;
_caretVisible = false;
_caretTime = 0;
// Add scrollbar
_scrollBar = new ScrollBarWidget(this, _w - kScrollBarWidth - 1, 0, kScrollBarWidth, _h);
_scrollBar->setTarget(this);
// Init callback
_callbackProc = 0;
_callbackRefCon = 0;
// Init History
_historyIndex = 0;
_historyLine = 0;
_historySize = 0;
for (int i = 0; i < kHistorySize; i++)
_history[i][0] = '\0';
// Display greetings & prompt
print(gScummVMFullVersion);
print("\nConsole is ready\n");
_promptStartPos = _promptEndPos = -1;
}
void ConsoleDialog::reflowLayout() {
// Calculate the real width/height (rounded to char/line multiples)
_w = (uint16)(_widthPercent * g_system->getOverlayWidth());
// _w = (_widthPercent * g_system->getOverlayWidth() - kScrollBarWidth - 2) / kCharWidth;
// _w = _w * kCharWidth + kScrollBarWidth + 2;
_h = (uint16)((_heightPercent * g_system->getOverlayHeight() - 2) / kLineHeight);
_h = _h * kLineHeight + 2;
// Calculate depending values
_lineWidth = (_w - kScrollBarWidth - 2) / kCharWidth;
_linesPerPage = (_h - 2) / kLineHeight;
}
void ConsoleDialog::open() {
Dialog::open();
if (_promptStartPos == -1) {
print(PROMPT);
_promptStartPos = _promptEndPos = _currentPos;
}
}
void ConsoleDialog::drawDialog() {
// Blend over the background
g_gui.blendRect(_x, _y, _w, _h, g_gui._bgcolor, 2);
// Draw a border
g_gui.hLine(_x, _y + _h - 1, _x + _w - 1, g_gui._color);
// Draw text
int start = _scrollLine - _linesPerPage + 1;
int y = _y + 2;
for (int line = 0; line < _linesPerPage; line++) {
int x = _x + 1;
for (int column = 0; column < _lineWidth; column++) {
int l = (start + line) % _linesInBuffer;
byte c = buffer(l * _lineWidth + column);
g_gui.drawChar(c, x, y, g_gui._textcolor);
x += kCharWidth;
}
y += kLineHeight;
}
// Draw the scrollbar
_scrollBar->draw();
// Finally blit it all to the screen
g_gui.addDirtyRect(_x, _y, _w, _h);
}
void ConsoleDialog::handleTickle() {
uint32 time = g_system->get_msecs();
if (_caretTime < time) {
_caretTime = time + kCaretBlinkTime;
drawCaret(_caretVisible);
}
}
void ConsoleDialog::handleMouseWheel(int x, int y, int direction) {
_scrollBar->handleMouseWheel(x, y, direction);
}
void ConsoleDialog::handleKeyDown(uint16 ascii, int keycode, int modifiers) {
int i;
switch (keycode) {
case '\n': // enter/return
case '\r': {
if (_caretVisible)
drawCaret(true);
nextLine();
assert(_promptEndPos >= _promptStartPos);
int len = _promptEndPos - _promptStartPos;
bool keepRunning = true;
if (len > 0) {
// We have to allocate the string buffer with new, since VC++ sadly does not
// comply to the C++ standard, so we can't use a dynamic sized stack array.
char *str = new char[len + 1];
// Copy the user input to str
for (i = 0; i < len; i++)
str[i] = buffer(_promptStartPos + i);
str[len] = '\0';
// Add the input to the history
addToHistory(str);
// Pass it to the input callback, if any
if (_callbackProc)
keepRunning = (*_callbackProc)(this, str, _callbackRefCon);
// Get rid of the string buffer
delete [] str;
}
print(PROMPT);
_promptStartPos = _promptEndPos = _currentPos;
draw();
if (!keepRunning)
close();
break;
}
case 27: // escape
close();
break;
case 8: // backspace
if (_caretVisible)
drawCaret(true);
if (_currentPos > _promptStartPos) {
_currentPos--;
killChar();
}
scrollToCurrent();
draw(); // FIXME - not nice to redraw the full console just for one char!
break;
case 9: // tab
{
if (_completionCallbackProc) {
int len = _currentPos - _promptStartPos;
assert(len >= 0);
char *str = new char[len + 1];
// Copy the user input to str
for (i = 0; i < len; i++)
str[i] = buffer(_promptStartPos + i);
str[len] = '\0';
char *completion = 0;
if ((*_completionCallbackProc)(this, str, completion, _callbackRefCon)) {
if (_caretVisible)
drawCaret(true);
insertIntoPrompt(completion);
scrollToCurrent();
draw();
delete[] completion;
}
delete[] str;
}
break;
}
case 127:
killChar();
draw();
break;
/*
case 256 + 24: // pageup
_selectedItem -= _entriesPerPage - 1;
if (_selectedItem < 0)
_selectedItem = 0;
break;
case 256 + 25: // pagedown
_selectedItem += _entriesPerPage - 1;
if (_selectedItem >= _list.size() )
_selectedItem = _list.size() - 1;
break;
*/
case 256 + 22: // home
_scrollLine = _linesPerPage - 1; // FIXME - this is not correct after a wrap around
updateScrollBar();
draw();
break;
case 256 + 23: // end
_scrollLine = _currentPos / _lineWidth;
updateScrollBar();
draw();
break;
case 273: // cursor up
historyScroll(+1);
break;
case 274: // cursor down
historyScroll(-1);
break;
case 275: // cursor right
if (_currentPos < _promptEndPos)
_currentPos++;
draw();
break;
case 276: // cursor left
if (_currentPos > _promptStartPos)
_currentPos--;
draw();
break;
default:
if (ascii == '~' || ascii == '#') {
close();
} else if (modifiers == OSystem::KBD_CTRL) {
specialKeys(keycode);
} else if (isprint((char)ascii)) {
for (i = _promptEndPos - 1; i >= _currentPos; i--)
buffer(i + 1) = buffer(i);
_promptEndPos++;
putchar((char)ascii);
scrollToCurrent();
}
}
}
void ConsoleDialog::insertIntoPrompt(const char* str)
{
unsigned int l = strlen(str);
for (int i = _promptEndPos - 1; i >= _currentPos; i--)
buffer(i + l) = buffer(i);
for (unsigned int j = 0; j < l; ++j) {
_promptEndPos++;
putcharIntern(str[j]);
}
}
void ConsoleDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
switch (cmd) {
case kSetPositionCmd:
int newPos = (int)data + _linesPerPage - 1;
if (newPos != _scrollLine) {
_scrollLine = newPos;
draw();
}
break;
}
}
void ConsoleDialog::specialKeys(int keycode) {
switch (keycode) {
case 'a':
_currentPos = _promptStartPos;
draw();
break;
case 'd':
if (_currentPos < _promptEndPos) {
killChar();
draw();
}
break;
case 'e':
_currentPos = _promptEndPos;
draw();
break;
case 'k':
killLine();
draw();
break;
case 'w':
killLastWord();
draw();
break;
}
}
void ConsoleDialog::killChar() {
for (int i = _currentPos; i < _promptEndPos; i++)
buffer(i) = buffer(i + 1);
buffer(_promptEndPos) = ' ';
_promptEndPos--;
}
void ConsoleDialog::killLine() {
for (int i = _currentPos; i < _promptEndPos; i++)
buffer(i) = ' ';
_promptEndPos = _currentPos;
}
void ConsoleDialog::killLastWord() {
int cnt = 0;
bool space = true;
while (_currentPos > _promptStartPos) {
if (buffer(_currentPos - 1) == ' ') {
if (!space)
break;
} else
space = false;
_currentPos--;
cnt++;
}
for (int i = _currentPos; i < _promptEndPos; i++)
buffer(i) = buffer(i + cnt);
buffer(_promptEndPos) = ' ';
_promptEndPos -= cnt;
}
void ConsoleDialog::addToHistory(const char *str) {
strcpy(_history[_historyIndex], str);
_historyIndex = (_historyIndex + 1) % kHistorySize;
_historyLine = 0;
if (_historySize < kHistorySize)
_historySize++;
}
void ConsoleDialog::historyScroll(int direction) {
if (_historySize == 0)
return;
if (_historyLine == 0 && direction > 0) {
int i;
for (i = 0; i < _promptEndPos - _promptStartPos; i++)
_history[_historyIndex][i] = buffer(_promptStartPos + i);
_history[_historyIndex][i] = '\0';
}
// Advance to the next line in the history
int line = _historyLine + direction;
if ((direction < 0 && line < 0) || (direction > 0 && line > _historySize))
return;
_historyLine = line;
// Hide caret if visible
if (_caretVisible)
drawCaret(true);
// Remove the current user text
_currentPos = _promptStartPos;
killLine();
// ... and ensure the prompt is visible
scrollToCurrent();
// Print the text from the history
int idx;
if (_historyLine > 0)
idx = (_historyIndex - _historyLine + _historySize) % _historySize;
else
idx = _historyIndex;
for (int i = 0; i < kLineBufferSize && _history[idx][i] != '\0'; i++)
putcharIntern(_history[idx][i]);
_promptEndPos = _currentPos;
// Ensure once more the caret is visible (in case of very long history entries)
scrollToCurrent();
draw();
}
void ConsoleDialog::nextLine() {
int line = _currentPos / _lineWidth;
if (line == _scrollLine)
_scrollLine++;
_currentPos = (line + 1) * _lineWidth;
updateScrollBar();
}
void ConsoleDialog::updateScrollBar() {
int line = _currentPos / _lineWidth;
_scrollBar->_numEntries = (line < _linesInBuffer) ? line + 1 : _linesInBuffer;
_scrollBar->_currentPos = _scrollBar->_numEntries - (line - _scrollLine + _linesPerPage);
_scrollBar->_entriesPerPage = _linesPerPage;
_scrollBar->recalc();
}
int ConsoleDialog::printf(const char *format, ...) {
va_list argptr;
va_start(argptr, format);
int count = this->vprintf(format, argptr);
va_end (argptr);
return count;
}
int ConsoleDialog::vprintf(const char *format, va_list argptr) {
#ifdef __PALM_OS__
char buf[256];
#else
char buf[2048];
#endif
#if defined(WIN32)
int count = _vsnprintf(buf, sizeof(buf), format, argptr);
#else
int count = vsnprintf(buf, sizeof(buf), format, argptr);
#endif
print(buf);
return count;
}
void ConsoleDialog::putchar(int c) {
if (_caretVisible)
drawCaret(true);
putcharIntern(c);
draw(); // FIXME - not nice to redraw the full console just for one char!
}
void ConsoleDialog::putcharIntern(int c) {
if (c == '\n')
nextLine();
else {
buffer(_currentPos) = (char)c;
_currentPos++;
if ((_scrollLine + 1) * _lineWidth == _currentPos) {
_scrollLine++;
updateScrollBar();
}
}
}
void ConsoleDialog::print(const char *str) {
if (_caretVisible)
drawCaret(true);
while (*str)
putcharIntern(*str++);
draw();
}
void ConsoleDialog::drawCaret(bool erase) {
int line = _currentPos / _lineWidth;
int displayLine = line - _scrollLine + _linesPerPage - 1;
// Only draw caret if visible
if (!isVisible() || displayLine < 0 || displayLine >= _linesPerPage) {
_caretVisible = false;
return;
}
int x = _x + 1 + (_currentPos % _lineWidth) * kCharWidth;
int y = _y + displayLine * kLineHeight;
char c = buffer(_currentPos);
if (erase) {
g_gui.fillRect(x, y, kCharWidth, kLineHeight, g_gui._bgcolor);
g_gui.drawChar(c, x, y + 2, g_gui._textcolor);
} else {
g_gui.fillRect(x, y, kCharWidth, kLineHeight, g_gui._textcolor);
g_gui.drawChar(c, x, y + 2, g_gui._bgcolor);
}
g_gui.addDirtyRect(x, y, kCharWidth, kLineHeight);
_caretVisible = !erase;
}
void ConsoleDialog::scrollToCurrent() {
int line = _currentPos / _lineWidth;
if (line + _linesPerPage <= _scrollLine) {
// TODO - this should only occur for loong edit lines, though
} else if (line > _scrollLine) {
_scrollLine = line;
updateScrollBar();
}
}
} // End of namespace GUI
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