mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-13 04:28:37 +00:00
b27a871f87
svn-id: r11045
531 lines
13 KiB
C++
531 lines
13 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2003 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*/
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#include "stdafx.h"
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#include "gui/console.h"
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#include "ScrollBarWidget.h"
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#include "base/engine.h"
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#define PROMPT ") "
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/* TODO:
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* - it is very inefficient to redraw the full thingy when just one char is added/removed.
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* Instead, we could just copy the GFX of the blank console (i.e. after the transparent
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* background is drawn, before any text is drawn). Then using that, it becomes trivial
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* to erase a single character, do scrolling etc.
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* - a *lot* of others things, this code is in no way complete and heavily under progress
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*/
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ConsoleDialog::ConsoleDialog(float widthPercent, float heightPercent)
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: Dialog(0, 0, 1, 1),
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_widthPercent(widthPercent), _heightPercent(heightPercent) {
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// Setup basic layout/dialog size
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reflowLayout();
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memset(_buffer, ' ', kBufferSize);
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_linesInBuffer = kBufferSize / _lineWidth;
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_currentPos = 0;
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_scrollLine = _linesPerPage - 1;
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_caretVisible = false;
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_caretTime = 0;
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// Add scrollbar
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_scrollBar = new ScrollBarWidget(this, _w - kScrollBarWidth - 1, 0, kScrollBarWidth, _h);
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_scrollBar->setTarget(this);
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// Init callback
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_callbackProc = 0;
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_callbackRefCon = 0;
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// Init History
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_historyIndex = 0;
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_historyLine = 0;
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_historySize = 0;
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for (int i = 0; i < kHistorySize; i++)
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_history[i][0] = '\0';
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// Display greetings & prompt
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print(gScummVMFullVersion);
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print("\nConsole is ready\n");
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_promptStartPos = _promptEndPos = -1;
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}
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void ConsoleDialog::reflowLayout() {
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// Calculate the real width/height (rounded to char/line multiples
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_w = (uint16)(_widthPercent * g_system->get_overlay_width());
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// _w = (_widthPercent * g_system->get_overlay_width() - kScrollBarWidth - 2) / kCharWidth;
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// _w = _w * kCharWidth + kScrollBarWidth + 2;
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_h = (uint16)((_heightPercent * g_system->get_overlay_height() - 2) / kLineHeight);
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_h = _h * kLineHeight + 2;
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// Calculate depending values
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_lineWidth = (_w - kScrollBarWidth - 2) / kCharWidth;
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_linesPerPage = (_h - 2) / kLineHeight;
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}
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void ConsoleDialog::open() {
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Dialog::open();
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if (_promptStartPos == -1) {
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print(PROMPT);
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_promptStartPos = _promptEndPos = _currentPos;
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}
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}
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void ConsoleDialog::drawDialog() {
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// Blend over the background
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g_gui.blendRect(_x, _y, _w, _h, g_gui._bgcolor, 2);
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// Draw a border
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g_gui.hLine(_x, _y + _h - 1, _x + _w - 1, g_gui._color);
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// Draw text
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int start = _scrollLine - _linesPerPage + 1;
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int y = _y + 2;
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for (int line = 0; line < _linesPerPage; line++) {
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int x = _x + 1;
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for (int column = 0; column < _lineWidth; column++) {
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int l = (start + line) % _linesInBuffer;
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byte c = _buffer[l * _lineWidth + column];
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g_gui.drawChar(c, x, y, g_gui._textcolor);
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x += kCharWidth;
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}
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y += kLineHeight;
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}
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// Draw the scrollbar
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_scrollBar->draw();
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// Finally blit it all to the screen
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g_gui.addDirtyRect(_x, _y, _w, _h);
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}
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void ConsoleDialog::handleTickle() {
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uint32 time = g_system->get_msecs();
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if (_caretTime < time) {
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_caretTime = time + kCaretBlinkTime;
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if (_caretVisible) {
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drawCaret(true);
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} else {
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drawCaret(false);
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}
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}
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}
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void ConsoleDialog::handleMouseWheel(int x, int y, int direction) {
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_scrollBar->handleMouseWheel(x, y, direction);
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}
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void ConsoleDialog::handleKeyDown(uint16 ascii, int keycode, int modifiers) {
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int i;
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switch (keycode) {
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case '\n': // enter/return
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case '\r': {
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if (_caretVisible)
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drawCaret(true);
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nextLine();
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int len = _promptEndPos - _promptStartPos;
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bool keepRunning = true;
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// FIXME - len should NEVER be negative. If anything makes it negative,
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// then the code doing that is buggy and needs to be fixed.
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assert(len >= 0);
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if (len > 0) {
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// We have to allocate the string buffer with new, since VC++ sadly does not
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// comply to the C++ standard, so we can't use a dynamic sized stack array.
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char *str = new char[len + 1];
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// Copy the user input to str
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for (i = 0; i < len; i++)
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str[i] = _buffer[(_promptStartPos + i) % kBufferSize];
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str[len] = '\0';
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// Add the input to the history
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addToHistory(str);
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// Pass it to the input callback, if any
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if (_callbackProc)
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keepRunning = (*_callbackProc)(this, str, _callbackRefCon);
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// Get rid of the string buffer
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delete [] str;
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}
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print(PROMPT);
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_promptStartPos = _promptEndPos = _currentPos;
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draw();
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if (!keepRunning)
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close();
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break;
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}
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case 27: // escape
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close();
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break;
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case 8: // backspace
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if (_caretVisible)
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drawCaret(true);
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if (_currentPos > _promptStartPos) {
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_currentPos--;
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killChar();
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}
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scrollToCurrent();
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draw(); // FIXME - not nice to redraw the full console just for one char!
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break;
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case 9: // tab
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{
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if (_completionCallbackProc) {
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int len = _currentPos - _promptStartPos;
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assert(len >= 0);
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char *str = new char[len + 1];
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// Copy the user input to str
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for (i = 0; i < len; i++)
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str[i] = _buffer[(_promptStartPos + i) % kBufferSize];
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str[len] = '\0';
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char *completion = 0;
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if ((*_completionCallbackProc)(this, str, completion, _callbackRefCon)) {
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if (_caretVisible)
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drawCaret(true);
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insertIntoPrompt(completion);
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scrollToCurrent();
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draw();
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delete[] completion;
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}
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delete[] str;
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}
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break;
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}
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case 127:
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killChar();
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draw();
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break;
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/*
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case 256 + 24: // pageup
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_selectedItem -= _entriesPerPage - 1;
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if (_selectedItem < 0)
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_selectedItem = 0;
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break;
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case 256 + 25: // pagedown
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_selectedItem += _entriesPerPage - 1;
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if (_selectedItem >= _list.size() )
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_selectedItem = _list.size() - 1;
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break;
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*/
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case 256 + 22: // home
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_scrollLine = _linesPerPage - 1; // FIXME - this is not correct after a wrap around
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updateScrollBar();
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draw();
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break;
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case 256 + 23: // end
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_scrollLine = _currentPos / _lineWidth;
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updateScrollBar();
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draw();
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break;
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case 273: // cursor up
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historyScroll(+1);
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break;
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case 274: // cursor down
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historyScroll(-1);
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break;
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case 275: // cursor right
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if (_currentPos < _promptEndPos)
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_currentPos++;
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draw();
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break;
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case 276: // cursor left
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if (_currentPos > _promptStartPos)
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_currentPos--;
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draw();
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break;
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default:
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if (ascii == '~' || ascii == '#') {
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close();
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} else if (modifiers == OSystem::KBD_CTRL) {
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specialKeys(keycode);
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} else if (isprint((char)ascii)) {
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for (i = _promptEndPos-1; i >= _currentPos; i--)
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_buffer[(i + 1) % kBufferSize] = _buffer[i % kBufferSize];
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_promptEndPos++;
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putchar((char)ascii);
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scrollToCurrent();
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}
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}
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}
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void ConsoleDialog::insertIntoPrompt(const char* str)
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{
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unsigned int l = strlen(str);
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for (int i = _promptEndPos-1; i >= _currentPos; i--)
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_buffer[(i + l) % kBufferSize] =
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_buffer[i % kBufferSize];
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for (unsigned int j = 0; j < l; ++j) {
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_promptEndPos++;
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putcharIntern(str[j]);
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}
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}
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void ConsoleDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
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switch (cmd) {
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case kSetPositionCmd:
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int newPos = (int)data + _linesPerPage - 1;
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if (newPos != _scrollLine) {
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_scrollLine = newPos;
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draw();
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}
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break;
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}
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}
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void ConsoleDialog::specialKeys(int keycode) {
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switch (keycode) {
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case 'a':
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_currentPos = _promptStartPos;
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draw();
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break;
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case 'd':
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if (_currentPos < _promptEndPos) {
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killChar();
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draw();
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}
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break;
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case 'e':
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_currentPos = _promptEndPos;
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draw();
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break;
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case 'k':
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killLine();
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draw();
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break;
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case 'w':
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killLastWord();
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draw();
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break;
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}
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}
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void ConsoleDialog::killChar() {
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for (int i = _currentPos; i < _promptEndPos; i++)
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_buffer[i % kBufferSize] = _buffer[(i+1) % kBufferSize];
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_buffer[_promptEndPos % kBufferSize] = ' ';
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_promptEndPos--;
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}
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void ConsoleDialog::killLine() {
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for (int i = _currentPos; i < _promptEndPos; i++)
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_buffer[i % kBufferSize] = ' ';
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_promptEndPos = _currentPos;
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}
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void ConsoleDialog::killLastWord() {
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int pos;
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int cnt = 0;
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bool space = true;
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while (_currentPos > _promptStartPos) {
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pos = getBufferPos();
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if (_buffer[pos-1] == ' ') {
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if (!space)
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break;
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} else
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space = false;
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_currentPos--;
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cnt++;
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}
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for (int i = _currentPos; i < _promptEndPos; i++)
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_buffer[i % kBufferSize] = _buffer[(i+cnt) % kBufferSize];
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_buffer[_promptEndPos % kBufferSize] = ' ';
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_promptEndPos -= cnt;
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}
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void ConsoleDialog::addToHistory(const char *str) {
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strcpy(_history[_historyIndex], str);
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_historyIndex = (_historyIndex + 1) % kHistorySize;
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_historyLine = 0;
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if (_historySize < kHistorySize)
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_historySize++;
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}
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void ConsoleDialog::historyScroll(int direction) {
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if (_historySize == 0)
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return;
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if (_historyLine == 0 && direction > 0) {
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int i;
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for (i = 0; i < _promptEndPos - _promptStartPos; i++)
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_history[_historyIndex][i] = _buffer[(_promptStartPos + i) % kBufferSize];
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_history[_historyIndex][i] = '\0';
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}
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// Advance to the next line in the history
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int line = _historyLine + direction;
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if ((direction < 0 && line < 0) || (direction > 0 && line > _historySize))
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return;
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_historyLine = line;
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// Hide caret if visible
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if (_caretVisible)
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drawCaret(true);
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// Remove the current user text
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_currentPos = _promptStartPos;
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killLine();
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// ... and ensure the prompt is visible
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scrollToCurrent();
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// Print the text from the history
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int idx;
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if (_historyLine > 0)
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idx = (_historyIndex - _historyLine + _historySize) % _historySize;
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else
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idx = _historyIndex;
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for (int i = 0; i < kLineBufferSize && _history[idx][i] != '\0'; i++)
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putcharIntern(_history[idx][i]);
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_promptEndPos = _currentPos;
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// Ensure once more the caret is visible (in case of very long history entries)
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scrollToCurrent();
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draw();
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}
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void ConsoleDialog::nextLine() {
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int line = _currentPos / _lineWidth;
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if (line == _scrollLine)
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_scrollLine++;
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_currentPos = (line + 1) * _lineWidth;
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updateScrollBar();
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}
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void ConsoleDialog::updateScrollBar() {
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int line = _currentPos / _lineWidth;
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_scrollBar->_numEntries = (line < _linesInBuffer) ? line + 1 : _linesInBuffer;
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_scrollBar->_currentPos = _scrollBar->_numEntries - (line - _scrollLine + _linesPerPage);
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_scrollBar->_entriesPerPage = _linesPerPage;
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_scrollBar->recalc();
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}
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int ConsoleDialog::printf(const char *format, ...) {
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va_list argptr;
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va_start(argptr, format);
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int count = this->vprintf(format, argptr);
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va_end (argptr);
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return count;
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}
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int ConsoleDialog::vprintf(const char *format, va_list argptr) {
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#ifdef __PALM_OS__
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char buf[256];
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#else
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char buf[2048];
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#endif
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#if defined(WIN32)
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int count = _vsnprintf(buf, sizeof(buf), format, argptr);
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#else
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int count = vsnprintf(buf, sizeof(buf), format, argptr);
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#endif
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print(buf);
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return count;
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}
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void ConsoleDialog::putchar(int c) {
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if (_caretVisible)
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drawCaret(true);
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putcharIntern(c);
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draw(); // FIXME - not nice to redraw the full console just for one char!
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}
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void ConsoleDialog::putcharIntern(int c) {
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if (c == '\n')
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nextLine();
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else {
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_buffer[getBufferPos()] = (char)c;
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_currentPos++;
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if ((_scrollLine + 1) * _lineWidth == _currentPos) {
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_scrollLine++;
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updateScrollBar();
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}
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}
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}
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void ConsoleDialog::print(const char *str) {
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if (_caretVisible)
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drawCaret(true);
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while (*str)
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putcharIntern(*str++);
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draw();
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}
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void ConsoleDialog::drawCaret(bool erase) {
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int line = _currentPos / _lineWidth;
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int displayLine = line - _scrollLine + _linesPerPage - 1;
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// Only draw caret if visible
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if (!isVisible() || displayLine < 0 || displayLine >= _linesPerPage) {
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_caretVisible = false;
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return;
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}
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int x = _x + 1 + (_currentPos % _lineWidth) * kCharWidth;
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int y = _y + displayLine * kLineHeight;
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char c = _buffer[getBufferPos()];
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if (erase) {
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g_gui.fillRect(x, y, kCharWidth, kLineHeight, g_gui._bgcolor);
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g_gui.drawChar(c, x, y + 2, g_gui._textcolor);
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} else {
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g_gui.fillRect(x, y, kCharWidth, kLineHeight, g_gui._textcolor);
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g_gui.drawChar(c, x, y + 2, g_gui._bgcolor);
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}
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g_gui.addDirtyRect(x, y, kCharWidth, kLineHeight);
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_caretVisible = !erase;
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}
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void ConsoleDialog::scrollToCurrent() {
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int line = _currentPos / _lineWidth;
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int displayLine = line - _scrollLine + _linesPerPage - 1;
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if (displayLine < 0) {
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// TODO - this should only occur for loong edit lines, though
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} else if (displayLine >= _linesPerPage) {
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_scrollLine = _currentPos / _lineWidth;
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updateScrollBar();
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}
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}
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