scummvm/gui/console.cpp

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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002 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 "console.h"
#include "ScrollBarWidget.h"
#include "common/engine.h"
/*
_ _ _ _ _ _
| | | |_ __ __| | ___ _ __ ___ ___ _ __ ___| |_ _ __ _ _ ___| |_(_) ___ _ __
| | | | '_ \ / _` |/ _ \ '__| / __/ _ \| '_ \/ __| __| '__| | | |/ __| __| |/ _ \| '_ \
| |_| | | | | (_| | __/ | | (_| (_) | | | \__ \ |_| | | |_| | (__| |_| | (_) | | | |
\___/|_| |_|\__,_|\___|_| \___\___/|_| |_|___/\__|_| \__,_|\___|\__|_|\___/|_| |_|
This code is not finished, so please don't complain :-)
*/
#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.
* - add a scrollbar widget to allow scrolling in the history
* - a *lot* of others things, this code is in no way complete and heavily under progress
*/
ConsoleDialog::ConsoleDialog(NewGui *gui)
: Dialog(gui, 0, 0, 320, 6*kLineHeight+2)
{
_lineWidth = (_w - kScrollBarWidth - 2) / kCharWidth;
_linesPerPage = (_h - 2) / kLineHeight;
memset(_buffer, ' ', kBufferSize);
_linesInBuffer = kBufferSize / _lineWidth;
_currentPos = 0;
_scrollLine = _linesPerPage - 1;
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_caretVisible = false;
_caretTime = 0;
// Add scrollbar
_scrollBar = new ScrollBarWidget(this, _w - kScrollBarWidth - 1, 0, kScrollBarWidth, _h);
_scrollBar->setTarget(this);
// Display greetings & prompt
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print("ScummVM "SCUMMVM_VERSION" (" SCUMMVM_CVS ")\n");
print("Console is ready\n");
print(PROMPT);
_promptStartPos = _promptEndPos = _currentPos;
}
void ConsoleDialog::drawDialog()
{
// Blend over the background
_gui->blendRect(_x, _y, _w, _h, _gui->_bgcolor, 2);
// Draw a border
_gui->hline(_x, _y+_h-1, _x+_w-1, _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++) {
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int l = (start+line) % _linesInBuffer;
byte c = _buffer[l * _lineWidth + column];
_gui->drawChar(c, x, y, _gui->_textcolor);
x += kCharWidth;
}
y += kLineHeight;
}
// Draw the scrollbar
_scrollBar->draw();
// Finally blit it all to the screen
_gui->addDirtyRect(_x, _y, _w, _h);
}
void ConsoleDialog::handleTickle()
{
uint32 time = _gui->get_time();
if (_caretTime < time) {
_caretTime = time + kCaretBlinkTime;
if (_caretVisible) {
drawCaret(true);
} else {
drawCaret(false);
}
}
}
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': {
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if (_caretVisible)
drawCaret(true);
nextLine();
int len = _promptEndPos - _promptStartPos;
char str[len + 1];
for (i = 0; i < len; i++)
str[i] = _buffer[(_promptStartPos + i) % kBufferSize];
str[len] = 0;
printf("You entered '%s'\n", str);
print(PROMPT);
_promptStartPos = _promptEndPos = _currentPos;
draw();
break;
}
case 27: // escape
close();
break;
case 8: // backspace
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if (_caretVisible)
drawCaret(true);
if (_currentPos > _promptStartPos) {
_currentPos--;
for (i = _currentPos; i < _promptEndPos; i++)
_buffer[i % kBufferSize] = _buffer[(i+1) % kBufferSize];
_buffer[_promptEndPos % kBufferSize] = ' ';
_promptEndPos--;
}
scrollToCurrent();
draw(); // FIXME - not nice to redraw the full console just for one char!
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 275: // cursor right
if (_currentPos < _promptEndPos)
_currentPos++;
draw();
break;
case 276: // cursor left
if (_currentPos > _promptStartPos)
_currentPos--;
draw();
break;
default:
if (ascii == '~' || ascii == '#') {
close();
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} else if (modifiers == OSystem::KBD_CTRL) {
specialKeys(keycode);
} else if (isprint((char)ascii)) {
for (i = _promptEndPos-1; i >= _currentPos; i--)
_buffer[(i+1) % kBufferSize] = _buffer[i % kBufferSize];
_promptEndPos++;
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putchar((char)ascii);
scrollToCurrent();
}
}
}
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 'e':
_currentPos = _promptEndPos;
draw();
break;
case 'k':
killLine();
draw();
break;
case 'w':
killLastWord();
draw();
break;
}
}
void ConsoleDialog::killLine()
{
for (int i = _currentPos; i < _promptEndPos; i++)
_buffer[i % kBufferSize] = ' ';
_promptEndPos = _currentPos;
}
void ConsoleDialog::killLastWord()
{
int pos;
while (_currentPos > _promptStartPos) {
_currentPos--;
pos = getBufferPos();
if (_buffer[pos] != ' ')
_buffer[pos] = ' ';
else
break;
}
}
void ConsoleDialog::nextLine()
{
int line = _currentPos / _lineWidth;
if (line == _scrollLine)
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_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();
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}
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)
{
char buf[2048];
int count = vsnprintf(buf, sizeof(buf), format, argptr);
print(buf);
return count;
}
void ConsoleDialog::putchar(int c)
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{
if (_caretVisible)
drawCaret(true);
putcharIntern(c);
draw(); // FIXME - not nice to redraw the full console just for one char!
}
void ConsoleDialog::putcharIntern(int c)
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{
if (c == '\n')
nextLine();
else {
_buffer[getBufferPos()] = (char)c;
_currentPos++;
if ((_scrollLine + 1) * _lineWidth == _currentPos) {
_scrollLine++;
updateScrollBar();
}
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}
}
void ConsoleDialog::print(const char *str)
{
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if (_caretVisible)
drawCaret(true);
while (*str)
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putcharIntern(*str++);
draw();
}
void ConsoleDialog::drawCaret(bool erase)
{
int line = _currentPos / _lineWidth;
int displayLine = line - _scrollLine + _linesPerPage - 1;
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// Only draw caret if visible
if (!isVisible() || displayLine < 0 || displayLine >= _linesPerPage) {
_caretVisible = false;
return;
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}
int x = _x + 1 + (_currentPos % _lineWidth) * kCharWidth;
int y = _y + displayLine * kLineHeight;
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char c = _buffer[getBufferPos()];
if (erase) {
_gui->fillRect(x, y, kCharWidth, kLineHeight, _gui->_bgcolor);
_gui->drawChar(c, x, y+2, _gui->_textcolor);
} else {
_gui->fillRect(x, y, kCharWidth, kLineHeight, _gui->_textcolor);
_gui->drawChar(c, x, y+2, _gui->_bgcolor);
}
_gui->addDirtyRect(x, y, kCharWidth, kLineHeight);
_caretVisible = !erase;
}
void ConsoleDialog::scrollToCurrent()
{
int line = _currentPos / _lineWidth;
int displayLine = line - _scrollLine + _linesPerPage - 1;
if (displayLine < 0) {
// TODO - this should only occur for loong edit lines, though
} else if (displayLine >= _linesPerPage) {
_scrollLine = _currentPos / _lineWidth;
updateScrollBar();
}
}