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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*/
#include "common/stdafx.h"
#include "gui/console.h"
#include "gui/ScrollBarWidget.h"
#include "gui/eval.h"
#include "base/engine.h"
#include "base/version.h"
#include "common/system.h"
#include "graphics/font.h"
namespace GUI {
#define kConsoleCharWidth (_font->getMaxCharWidth())
#define kConsoleLineHeight (_font->getFontHeight() + 2)
enum {
kConsoleSlideDownDuration = 200 // Time in milliseconds
};
#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) {
// Reset the line buffer
memset(_buffer, ' ', kBufferSize);
// Dummy
_scrollBar = new ScrollBarWidget(this, 0, 0, 5, 10);
_scrollBar->setTarget(this);
init();
_currentPos = 0;
_scrollLine = _linesPerPage - 1;
_firstLineInBuffer = 0;
_caretVisible = false;
_caretTime = 0;
_slideMode = kNoSlideMode;
_slideTime = 0;
_promptStartPos = _promptEndPos = -1;
// 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");
}
void ConsoleDialog::init() {
const int screenW = g_system->getOverlayWidth();
const int screenH = g_system->getOverlayHeight();
int f = g_gui.evaluator()->getVar("Console.font");
if (f == EVAL_UNDEF_VAR)
_font = FontMan.getFontByUsage(Graphics::FontManager::kConsoleFont);
else
_font = g_gui.theme()->getFont((Theme::kFontStyle)f);
// Calculate the real width/height (rounded to char/line multiples)
_w = (uint16)(_widthPercent * screenW);
_h = (uint16)((_heightPercent * screenH - 2) / kConsoleLineHeight);
_h = _h * kConsoleLineHeight + 2;
// Set scrollbar dimensions
int scrollBarWidth;
if (g_gui.getWidgetSize() == kBigWidgetSize)
scrollBarWidth = kBigScrollBarWidth;
else
scrollBarWidth = kNormalScrollBarWidth;
_scrollBar->resize(_w - scrollBarWidth - 1, 0, scrollBarWidth, _h);
_drawingHints = THEME_HINT_FIRST_DRAW | THEME_HINT_SAVE_BACKGROUND;
_pageWidth = (_w - scrollBarWidth - 2) / kConsoleCharWidth;
_linesPerPage = (_h - 2) / kConsoleLineHeight;
_linesInBuffer = kBufferSize / kLineWidth;
}
void ConsoleDialog::slideUpAndClose() {
if (_slideMode == kNoSlideMode) {
_slideTime = g_system->getMillis();
_slideMode = kUpSlideMode;
}
}
void ConsoleDialog::open() {
// TODO: find a new way to do this
// Initiate sliding the console down. We do a very simple trick to achieve
// this effect: we simply move the console dialog just above (outside) the
// visible screen area, then shift it down in handleTickle() over a
// certain period of time.
const int screenW = g_system->getOverlayWidth();
const int screenH = g_system->getOverlayHeight();
// Calculate the real width/height (rounded to char/line multiples)
uint16 w = (uint16)(_widthPercent * screenW);
uint16 h = (uint16)((_heightPercent * screenH - 2) / kConsoleLineHeight);
h = h * kConsoleLineHeight + 2;
if (_w != w || _h != h)
init();
_drawingHints |= THEME_HINT_FIRST_DRAW | THEME_HINT_SAVE_BACKGROUND;
_y = -_h;
_slideTime = g_system->getMillis();
_slideMode = kDownSlideMode;
Dialog::open();
if (_promptStartPos == -1) {
print(PROMPT);
_promptStartPos = _promptEndPos = _currentPos;
}
}
void ConsoleDialog::close() {
Dialog::close();
}
void ConsoleDialog::drawDialog() {
// Draw text
int start = _scrollLine - _linesPerPage + 1;
int y = _y + 2;
int limit = MIN(_pageWidth, (int)kLineWidth);
g_gui.theme()->drawDialogBackground(Common::Rect(_x, _y, _x+_w, _y+_h), _drawingHints);
// FIXME: for the old theme the frame around the console vanishes
// when any action is processed if we enable this
// _drawingHints &= ~THEME_HINT_FIRST_DRAW;
for (int line = 0; line < _linesPerPage; line++) {
int x = _x + 1;
for (int column = 0; column < limit; column++) {
#if 0
int l = (start + line) % _linesInBuffer;
byte c = buffer(l * kLineWidth + column);
#else
byte c = buffer((start + line) * kLineWidth + column);
#endif
g_gui.theme()->drawChar(Common::Rect(x, y, x+kConsoleCharWidth, y+kConsoleLineHeight), c, _font);
x += kConsoleCharWidth;
}
y += kConsoleLineHeight;
}
// Draw the scrollbar
_scrollBar->draw();
}
void ConsoleDialog::handleScreenChanged() {
init();
_scrollLine = _promptEndPos / kLineWidth;
if (_scrollLine < _linesPerPage - 1)
_scrollLine = _linesPerPage - 1;
updateScrollBuffer();
Dialog::handleScreenChanged();
draw();
}
void ConsoleDialog::handleTickle() {
uint32 time = g_system->getMillis();
if (_caretTime < time) {
_caretTime = time + kCaretBlinkTime;
drawCaret(_caretVisible);
}
// Perform the "slide animation".
if (_slideMode != kNoSlideMode) {
_drawingHints = THEME_HINT_FIRST_DRAW | THEME_HINT_SAVE_BACKGROUND;
const float tmp = (float)(g_system->getMillis() - _slideTime) / kConsoleSlideDownDuration;
if (_slideMode == kUpSlideMode) {
_y = (int)(_h * (0.0 - tmp));
} else {
_y = (int)(_h * (tmp - 1.0));
}
if (_slideMode == kDownSlideMode && _y > 0) {
// End the slide
_slideMode = kNoSlideMode;
_y = 0;
draw();
} else if (_slideMode == kUpSlideMode && _y <= -_h) {
// End the slide
//_slideMode = kNoSlideMode;
close();
} else
draw();
}
}
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;
if (_slideMode != kNoSlideMode)
return;
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)
slideUpAndClose();
break;
}
case 27: // escape
slideUpAndClose();
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
if (modifiers == OSystem::KBD_SHIFT) {
_scrollLine -= _linesPerPage - 1;
if (_scrollLine < _firstLineInBuffer + _linesPerPage - 1)
_scrollLine = _firstLineInBuffer + _linesPerPage - 1;
updateScrollBuffer();
draw();
}
break;
case 256 + 25: // pagedown
if (modifiers == OSystem::KBD_SHIFT) {
_scrollLine += _linesPerPage - 1;
if (_scrollLine > _promptEndPos / kLineWidth) {
_scrollLine = _promptEndPos / kLineWidth;
if (_scrollLine < _firstLineInBuffer + _linesPerPage - 1)
_scrollLine = _firstLineInBuffer + _linesPerPage - 1;
}
updateScrollBuffer();
draw();
}
break;
case 256 + 22: // home
if (modifiers == OSystem::KBD_SHIFT) {
_scrollLine = _firstLineInBuffer + _linesPerPage - 1;
updateScrollBuffer();
} else {
_currentPos = _promptStartPos;
}
draw();
break;
case 256 + 23: // end
if (modifiers == OSystem::KBD_SHIFT) {
_scrollLine = _promptEndPos / kLineWidth;
if (_scrollLine < _linesPerPage - 1)
_scrollLine = _linesPerPage - 1;
updateScrollBuffer();
} else {
_currentPos = _promptEndPos;
}
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 == '#') {
slideUpAndClose();
} 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 + _firstLineInBuffer;
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 / kLineWidth;
if (line == _scrollLine)
_scrollLine++;
_currentPos = (line + 1) * kLineWidth;
updateScrollBuffer();
}
// Call this (at least) when the current line changes or when
// a new line is added
void ConsoleDialog::updateScrollBuffer() {
int lastchar = MAX(_promptEndPos, _currentPos);
int line = lastchar / kLineWidth;
int numlines = (line < _linesInBuffer) ? line + 1 : _linesInBuffer;
int firstline = line - numlines + 1;
if (firstline > _firstLineInBuffer) {
// clear old line from buffer
for (int i = lastchar; i < (line+1) * kLineWidth; ++i)
buffer(i) = ' ';
_firstLineInBuffer = firstline;
}
_scrollBar->_numEntries = numlines;
_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 PALMOS_MODE
char buf[256];
#else
char buf[2048];
#endif
#if defined(WIN32)
int count = _vsnprintf(buf, sizeof(buf), format, argptr);
#elif defined(__SYMBIAN32__)
int count = vsprintf(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) * kLineWidth == _currentPos) {
_scrollLine++;
updateScrollBuffer();
}
}
}
void ConsoleDialog::print(const char *str) {
if (_caretVisible)
drawCaret(true);
while (*str)
putcharIntern(*str++);
draw();
}
void ConsoleDialog::drawCaret(bool erase) {
// TODO: use code from EditableWidget::drawCaret here
int line = _currentPos / kLineWidth;
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 % kLineWidth) * kConsoleCharWidth;
int y = _y + displayLine * kConsoleLineHeight;
_caretVisible = !erase;
g_gui.theme()->drawCaret(Common::Rect(x, y, x+kConsoleCharWidth, y+kConsoleLineHeight), erase);
}
void ConsoleDialog::scrollToCurrent() {
int line = _promptEndPos / kLineWidth;
if (line + _linesPerPage <= _scrollLine) {
// TODO - this should only occur for loong edit lines, though
} else if (line > _scrollLine) {
_scrollLine = line;
updateScrollBuffer();
}
}
} // End of namespace GUI
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