TwoTerm/cpp/Screen.cpp

910 lines
20 KiB
C++
Raw Normal View History

/*
* Screen.cpp
* 2Term
*
* Created by Kelvin Sherlock on 7/7/2010.
* Copyright 2010 __MyCompanyName__. All rights reserved.
*
*/
#include "Screen.h"
#include <algorithm>
iPoint TextPort::absoluteCursor() const
{
return iPoint(frame.origin.x + cursor.x, frame.origin.y + cursor.y);
}
Screen::Screen(unsigned height, unsigned width)
{
_port.frame = iRect(0, 0, width, height);
_port.rightMargin = TextPort::MarginTruncate;
_port.rightMargin = TextPort::MarginTruncate;
_port.advanceCursor = true;
_port.scroll = true;
_flag = 0;
_screen.resize(height);
for (ScreenIterator iter = _screen.begin(); iter != _screen.end(); ++iter)
{
iter->resize(width);
}
}
Screen::~Screen()
{
}
void Screen::beginUpdate()
{
_lock.lock();
_updates.clear();
_updateCursor = cursor();
}
iRect Screen::endUpdate()
{
int maxX = -1;
int maxY = -1;
int minX = width();
int minY = height();
iPoint c = cursor();
if (c != _updateCursor)
{
_updates.push_back(c);
_updates.push_back(_updateCursor);
}
for (UpdateIterator iter = _updates.begin(); iter != _updates.end(); ++iter)
{
maxX = std::max(maxX, iter->x);
maxY = std::max(maxY, iter->y);
minX = std::min(minX, iter->x);
minY = std::min(minY, iter->y);
}
_lock.unlock();
return iRect(iPoint(minX, minY), iSize(maxX + 1 - minX, maxY + 1 - minY));
}
void Screen::setFlag(uint8_t flag)
{
_flag = flag;
}
void Screen::setFlagBit(uint8_t bit)
{
_flag |= bit;
}
void Screen::clearFlagBit(uint8_t bit)
{
_flag &= ~bit;
}
void Screen::putc(TextPort *textPort, uint8_t c)
{
/*
* textport must be valid.
* cursor must be within textport.
*/
if (!textPort) textPort = &_port;
iPoint cursor = textPort->absoluteCursor();
// right margin is a special case.
if (textPort->cursor.x == textPort->frame.width() -1)
{
if (textPort->rightMargin == TextPort::MarginTruncate) return;
if (textPort->rightMargin == TextPort::MarginOverwrite)
{
_updates.push_back(cursor);
_screen[cursor.y][cursor.x] = CharInfo(c, _flag);
return;
}
//if (textPort->rightMargin == TextPort::MarginWrap)
}
_updates.push_back(cursor);
_screen[cursor.y][cursor.x] = CharInfo(c, _flag);
if (textPort->advanceCursor)
{
incrementX(textPort);
}
}
void Screen::tabTo(TextPort *textPort, unsigned xPos)
{
if (!textPort) textPort = &_port;
CharInfo clear(' ', _flag);
iPoint cursor = textPort->absoluteCursor();
xPos = std::min((int)xPos, textPort->frame.width() - 1);
_updates.push_back(cursor);
for (unsigned x = textPort->cursor.x; x < xPos; ++x)
{
_screen[cursor.y][x + textPort->frame.minX()] = clear;
}
textPort->cursor.x = xPos;
if (textPort != &_port) _port.cursor = textPort->absoluteCursor();
_updates.push_back(_port.cursor);
}
#pragma mark -
#pragma mark Cursor manipulation.
/*
* sets cursor.x within the textport.
* if x is outside the textport and clampX is true, it will be clamped to 0/width-1
* if x is outside the textport and clampX is false, x will not be updated.
*
* returns the new cursor.x
*/
int Screen::setX(TextPort *textPort, int x)
{
// honors clampX.
if (!textPort) textPort = &_port;
bool clamp = textPort->clampX;
if (x < 0)
{
if (clamp) textPort->cursor.x = 0;
}
else if (x >= textPort->frame.width())
{
if (clamp) textPort->cursor.x = textPort->frame.width() - 1;
}
else
{
textPort->cursor.x = x;
}
if (textPort != &_port) _port.cursor = textPort->absoluteCursor();
return textPort->cursor.x;
}
/*
* sets cursor.y within the textport.
* if y is outside the textport and clampY is true, it will be clamped to 0/height-1
* if y is outside the textport and clampY is false, y will not be updated.
*
* returns the new cursor.y
*/
int Screen::setY(TextPort *textPort, int y)
{
// honors clampY.
if (!textPort) textPort = &_port;
bool clamp = textPort->clampY;
if (y < 0)
{
if (clamp) textPort->cursor.y = 0;
}
else if (y >= textPort->frame.height())
{
if (clamp) textPort->cursor.y = textPort->frame.height() - 1;
}
else
{
textPort->cursor.y = y;
}
if (textPort != &_port) _port.cursor = textPort->absoluteCursor();
return textPort->cursor.y;
}
/*
* increments cursor.x within the textport.
* if rightMargin wraps, it will set x = 0 and incrementY (which may scroll)
* if rightMargin does not wrap, it will not be updated.
*
* returns the new cursor.x
*/
int Screen::incrementX(TextPort *textPort)
{
// honors wrap, scroll.
if (!textPort) textPort = &_port;
if (textPort->cursor.x == textPort->frame.width() - 1)
{
if (textPort->rightMargin == TextPort::MarginWrap)
{
textPort->cursor.x = 0;
incrementY(textPort);
}
}
else
{
textPort->cursor.x++;
}
if (textPort != &_port) _port.cursor = textPort->absoluteCursor();
return textPort->cursor.x;
}
/*
* decrements cursor.x within the textport.
* if leftMargin wraps, it will set x = width - 1 and decrementY (which may scroll)
* if leftMargin does not wrap, it will not be updated.
*
* returns the new cursor.x
*/
int Screen::decrementX(TextPort *textPort)
{
// honors wrap, scroll.
if (!textPort) textPort = &_port;
if (textPort->cursor.x == 0)
{
if (textPort->leftMargin == TextPort::MarginWrap)
{
textPort->cursor.x = textPort->frame.width() - 1;
decrementY(textPort);
}
}
else
{
textPort->cursor.x--;
}
if (textPort != &_port) _port.cursor = textPort->absoluteCursor();
return textPort->cursor.x;
}
/*
* increment cursor.y
* this is similar to lineFeed, except that it honors the scroll flag
* at the bottom of the screen.
* returns the new cursor.y
*/
int Screen::incrementY(TextPort *textPort)
{
// similar to linefeed, but honors scroll.
if (!textPort) textPort = &_port;
if (textPort->scroll)
return lineFeed(textPort);
if (textPort->cursor.y < textPort->frame.height() - 1)
return lineFeed(textPort);
return textPort->cursor.y;
}
/*
* decrement cursor.y
* this is similar to revereseLineFeed, except that it honors the scroll flag
* at the top of the screen.
* returns the new cursor.y
*/
int Screen::decrementY(TextPort *textPort)
{
// similar to reverseLineFeed, but will not scroll.
if (!textPort) textPort = &_port;
if (!textPort) textPort = &_port;
if (textPort->scroll)
return lineFeed(textPort);
if (textPort->cursor.y > 0)
return reverseLineFeed(textPort);
return textPort->cursor.y;
}
void Screen::setCursor(TextPort *textPort,iPoint point)
{
setX(textPort, point.x);
setY(textPort, point.y);
}
void Screen::setCursor(TextPort *textPort, int x, int y)
{
setX(textPort, x);
setY(textPort, y);
}
#pragma mark -
#pragma mark Erase
void Screen::erase(EraseRegion region)
{
CharInfoIterator ciIter;
ScreenIterator screenIter;
if (region == EraseAll)
{
ScreenIterator end = _screen.end();
for (screenIter = _screen.begin(); screenIter < end; ++screenIter)
{
std::fill(screenIter->begin(), screenIter->end(), CharInfo(0,0));
}
_updates.push_back(iPoint(0,0));
_updates.push_back(iPoint(width() - 1, height() - 1));
return;
}
// TODO -- be smart and check if cursor is at x = 0 (or x = _width - 1)
if (region == EraseBeforeCursor)
{
ScreenIterator end = _screen.begin() + y() - 1;
for (screenIter = _screen.begin(); screenIter < end; ++screenIter)
{
std::fill(screenIter->begin(), screenIter->end(), CharInfo(0,0));
}
_updates.push_back(iPoint(0,0));
_updates.push_back(iPoint(width() - 1, y()));
region = EraseLineBeforeCursor;
}
if (region == EraseAfterCursor)
{
ScreenIterator end = _screen.end();
for (screenIter = _screen.begin() + y() + 1; screenIter < end; ++screenIter)
{
std::fill(screenIter->begin(), screenIter->end(), CharInfo(0,0));
}
_updates.push_back(iPoint(0, y() + 1));
_updates.push_back(iPoint(width() - 1, height() - 1));
region = EraseLineAfterCursor;
}
if (region == EraseLineAll)
{
std::fill(_screen[y()].begin(), _screen[y()].end(), CharInfo(0,0));
_updates.push_back(iPoint(0, y()));
_updates.push_back(iPoint(width() - 1, y()));
return;
}
if (region == EraseLineBeforeCursor)
{
std::fill(_screen[y()].begin(), _screen[y()].begin() + x(), CharInfo(0,0));
_updates.push_back(iPoint(0, y()));
_updates.push_back(cursor());
return;
}
if (region == EraseLineAfterCursor)
{
std::fill(_screen[y()].begin() + x(), _screen[y()].end(), CharInfo(0,0));
_updates.push_back(cursor());
_updates.push_back(iPoint(width() - 1, y()));
return;
}
}
void Screen::erase(TextPort* textPort, EraseRegion region)
{
if (!textPort) textPort = &_port;
iRect frame = textPort->frame;
iPoint cursor = textPort->absoluteCursor();
if (region == EraseAll)
{
//erase the current screen
ScreenIterator begin = _screen.begin() + frame.minY();
ScreenIterator end = _screen.begin() + frame.maxY();
for (ScreenIterator iter = begin; iter != end; ++iter)
{
CharInfoIterator begin = iter->begin() + frame.minX();
CharInfoIterator end = iter->begin() + frame.maxX();
std::fill(begin, end, CharInfo(0, 0));
}
_updates.push_back(frame.origin);
_updates.push_back(iPoint(frame.maxX() - 1, frame.maxY() - 1));
return;
}
if (region == EraseLineAll)
{
// erase the current line.
ScreenIterator iter = _screen.begin() + cursor.y;
CharInfoIterator begin = iter->begin() + frame.minX();
CharInfoIterator end = iter->begin() + frame.maxX();
std::fill(begin, end, CharInfo(0, 0));
_updates.push_back(iPoint(frame.minX(), cursor.y));
_updates.push_back(iPoint(frame.maxX() - 1, cursor.y));
return;
}
if (region == EraseBeforeCursor)
{
// erase everything before the cursor
// part 1 -- erase all lines prior to the current line.
ScreenIterator begin = _screen.begin() + frame.minY();
ScreenIterator end = _screen.begin() + cursor.y;
for (ScreenIterator iter = begin; iter != end; ++iter)
{
CharInfoIterator begin = iter->begin() + frame.minX();
CharInfoIterator end = iter->begin() + frame.maxX();
std::fill(begin, end, CharInfo(0, 0));
}
_updates.push_back(frame.origin);
_updates.push_back(iPoint(frame.maxX() - 1, cursor.y - 1));
// handle rest below.
region = EraseLineBeforeCursor;
}
if (region == EraseAfterCursor)
{
// erase everything after the cursor
// part 1 -- erase all lines after the current line.
ScreenIterator begin = _screen.begin() + cursor.y + 1;
ScreenIterator end = _screen.begin() + frame.maxY();
if (begin < end)
{
for (ScreenIterator iter = begin; iter != end; ++iter)
{
CharInfoIterator begin = iter->begin() + frame.minX();
CharInfoIterator end = iter->begin() + frame.maxX();
std::fill(begin, end, CharInfo(0, 0));
}
_updates.push_back(iPoint(cursor.x, cursor.y + 1));
_updates.push_back(iPoint(frame.maxX() - 1, frame.maxY() - 1));
}
region = EraseLineAfterCursor;
}
if (region == EraseLineBeforeCursor)
{
// erase the current line, before the cursor.
ScreenIterator iter = _screen.begin() + cursor.y;
CharInfoIterator begin = iter->begin() + frame.minX();
CharInfoIterator end = iter->begin() + cursor.x;
std::fill(begin, end, CharInfo(0, 0));
_updates.push_back(iPoint(frame.minX(), cursor.y));
_updates.push_back(iPoint(cursor.x - 1, cursor.y));
return;
}
if (region == EraseLineAfterCursor)
{
// erase the current line, after the cursor.
ScreenIterator iter = _screen.begin() + cursor.y;
CharInfoIterator begin = iter->begin() + cursor.x;
CharInfoIterator end = iter->begin() + frame.maxX();
std::fill(begin, end, CharInfo(0, 0));
_updates.push_back(iPoint(cursor.x, cursor.y));
_updates.push_back(iPoint(frame.maxX() - 1, cursor.y));
return;
}
}
void Screen::eraseLine()
{
// erases everything to the right of, and including, the cursor
for (CharInfoIterator ciIter = _screen[y()].begin() + x(); ciIter < _screen[y()].end(); ++ciIter)
{
*ciIter = CharInfo(0, _flag);
}
_updates.push_back(cursor());
_updates.push_back(iPoint(width() - 1, y()));
}
void Screen::eraseScreen()
{
// returns everything to the right of, and including, the cursor as well as all subsequent lines.
eraseLine();
if (y() == height() -1) return;
for (ScreenIterator iter = _screen.begin() + y(); iter < _screen.end(); ++iter)
{
for (CharInfoIterator ciIter = iter->begin(); ciIter < iter->end(); ++ciIter)
{
*ciIter = CharInfo(0, _flag);
}
}
_updates.push_back(iPoint(0, y() + 1));
_updates.push_back(iPoint(width() - 1, height() - 1));
}
void Screen::eraseRect(iRect rect)
{
unsigned maxX = std::min(width(), rect.maxX());
unsigned maxY = std::min(height(), rect.maxY());
CharInfo clear;
for (unsigned y = rect.minY(); y < maxY; ++y)
{
for (unsigned x = rect.minX(); x < maxX; ++x)
{
_screen[y][x] = clear;
}
}
_updates.push_back(rect.origin);
_updates.push_back(iPoint(maxX - 1, maxY - 1));
}
void Screen::lineFeed()
{
// moves the screen up one row, inserting a blank line at the bottom.
if (y() == height() - 1)
{
deleteLine(0);
}
else
{
_port.cursor.y++;
}
}
/*
* perform a line feed. This increments Y. If Y was at the bottom of the
* textPort, the textPort scrolls.
*
*/
int Screen::lineFeed(TextPort *textPort)
{
if (!textPort)
{
lineFeed();
return y();
}
if (textPort->cursor.y == textPort->frame.height() - 1)
{
deleteLine(textPort, 0);
}
else
{
textPort->cursor.y++;
if (textPort != &_port) _port.cursor = textPort->absoluteCursor();
}
return textPort->cursor.y;
}
/*
* perform a reverse line feed. This increments Y. If Y was at the top of the
* textPort, the textPort scrolls.
*
*/
int Screen::reverseLineFeed(TextPort *textPort)
{
if (!textPort)
{
reverseLineFeed();
return y();
}
if (textPort->cursor.y == 0)
{
insertLine(textPort, 0);
}
else
{
textPort->cursor.y--;
if (textPort != &_port) _port.cursor = textPort->absoluteCursor();
}
return textPort->cursor.y;
}
void Screen::reverseLineFeed()
{
// moves the cursor down one row, inserting a blank line at the top.
if (y() == 0)
{
insertLine(0);
}
else
{
_port.cursor.y--;
}
}
void Screen::insertLine(unsigned line)
{
if (line >= height()) return;
if (line == height() - 1)
{
_screen.back().clear();
_screen.back().resize(width());
}
else
{
std::vector<CharInfo> newLine;
ScreenIterator iter;
_screen.pop_back();
iter = _screen.insert(_screen.begin() + line, newLine);
iter->resize(width());
}
_updates.push_back(iPoint(0, line));
_updates.push_back(iPoint(width() - 1, height() - 1));
}
// line is relative to the textView.
// textView has been constrained.
void Screen::insertLine(TextPort *textPort, unsigned line)
{
CharInfo ci;
if (!textPort) return insertLine(line);
iRect frame(textPort->frame);
int minY = frame.minY();
int maxY = frame.maxY();
int minX = frame.minX();
int maxX = frame.maxX();
if (line < 0) return;
if (line >= frame.height()) return;
// move all subsequent lines forward by 1.
for (int y = frame.height() - 2; y >= line; --y)
{
CharInfoIterator iter;
iter = _screen[minY + y].begin();
std::copy(iter +minX, iter + maxX, _screen[minY + y + 1].begin() + minX);
}
// clear the line.
std::fill(_screen[minY + line].begin() + minX, _screen[minY + line].begin() + maxX, ci);
// set the update region.
_updates.push_back(iPoint(minX, minY + line));
_updates.push_back(iPoint(maxX - 1, maxY - 1));
}
void Screen::deleteLine(unsigned line)
{
if (line >= height()) return;
if (line == height() - 1)
{
_screen.back().clear();
}
else
{
std::vector<CharInfo> newLine;
_screen.erase(_screen.begin() + line);
_screen.push_back(newLine);
}
_screen.back().resize(width());
_updates.push_back(iPoint(0, line));
_updates.push_back(iPoint(width() - 1, height() - 1));
}
void Screen::deleteLine(TextPort *textPort, unsigned line)
{
CharInfo ci;
if (!textPort) return deleteLine(line);
iRect frame(textPort->frame);
int minY = frame.minY();
int maxY = frame.maxY();
int minX = frame.minX();
int maxX = frame.maxX();
if (line < 0) return;
if (line >= frame.height()) return;
// move all subsequent lines back by 1.
for (int y = line; y < frame.height() - 1; ++y)
{
CharInfoIterator iter;
CharInfoIterator end;
iter = _screen[minY + y + 1].begin();
std::copy(iter + minX, iter + maxX, _screen[minY + y].begin() + minX);
}
// clear the last line.
std::fill(_screen[maxY - 1].begin() + minX, _screen[maxY - 1].begin() + maxX, ci);
// set the update region.
_updates.push_back(iPoint(minX, minY + line));
_updates.push_back(iPoint(maxX - 1, maxY - 1));
}
void Screen::setSize(unsigned w, unsigned h)
{
// TODO -- have separate minimum size for textport?
if ((height() == h) && (width() == w)) return;
if (height() < h)
{
_screen.resize(h);
}
else if (height() > h)
{
unsigned count = height() - h;
int y = _port.cursor.y;
int maxY = height() - 1;
// 1. erase from the bottom, up to the cursor (if blank)
// 2. erase lines from the top.
while (count && maxY > y)
{
// todo -- check if blank...
_screen.pop_back();
--count;
--maxY;
}
// erase lines from the top.
if (count)
_screen.erase(_screen.begin(), _screen.begin() + count);
}
//if (_width != _width || _height != height)
{
ScreenIterator iter;
for (iter = _screen.begin(); iter != _screen.end(); ++iter)
{
iter->resize(w);
}
}
_port.frame.size = iSize(w, h);
if (_port.cursor.y >= h) _port.cursor.y = h - 1;
if (_port.cursor.x >= w) _port.cursor.x = w - 1;
//fprintf(stderr, "setSize(%u, %u)\n", width, height);
}