/*******************************************************************************
* This file is part of logisim-evolution.
*
* logisim-evolution 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 3 of the License, or
* (at your option) any later version.
*
* logisim-evolution 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 logisim-evolution. If not, see <http://www.gnu.org/licenses/>.
*
* Original code by Carl Burch (http://www.cburch.com), 2011.
* Subsequent modifications by :
* + Haute École Spécialisée Bernoise
* http://www.bfh.ch
* + Haute École du paysage, d'ingénierie et d'architecture de Genève
* http://hepia.hesge.ch/
* + Haute École d'Ingénierie et de Gestion du Canton de Vaud
* http://www.heig-vd.ch/
* The project is currently maintained by :
* + REDS Institute - HEIG-VD
* Yverdon-les-Bains, Switzerland
* http://reds.heig-vd.ch
*******************************************************************************/
package com.cburch.logisim.std.memory;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import com.cburch.hex.HexModel;
import com.cburch.hex.HexModelListener;
import com.cburch.logisim.data.Bounds;
import com.cburch.logisim.instance.InstanceData;
import com.cburch.logisim.util.GraphicsUtil;
import com.cburch.logisim.util.StringUtil;
class MemState implements InstanceData, Cloneable, HexModelListener {
private MemContents contents;
private long curScroll = 0;
private long cursorLoc = -1;
private long curAddr = -1;
private boolean RecalculateParameters = true;
private int NrOfLines = 1;
private int NrDataSymbolsEachLine = 1;
private int AddrBlockSize = 0;
private int DataBlockSize = 0;
private int DataSize = 0;
private int SpaceSize = 0;
private int xOffset = 0;
private int yOffset = 0;
private int CharHeight = 0;
private int ControlBlockHeight = 0;
MemState(MemContents contents) {
this.contents = contents;
setBits(contents.getLogLength(), contents.getWidth());
contents.addHexModelListener(this);
}
public void bytesChanged(HexModel source, long start, long numBytes,
int[] oldValues) {
}
/*
* public Bounds getBounds(long addr, Bounds bds) { int addrBits =
* getAddrBits(); int boxX = bds.getX() + (addrBits <= 12 ? ENTRY_XOFFS12 :
* ENTRY_XOFFS32); int boxW = addrBits <= 12 ? TABLE_WIDTH12 :
* TABLE_WIDTH32; if (addr < 0) { int addrLen = (contents.getWidth() + 3) /
* 4; int width = ADDR_WIDTH_PER_CHAR * addrLen; return Bounds.create(boxX -
* width, bds.getY() + ENTRY_YOFFS, width, ENTRY_HEIGHT); } else { int bdsX
* = addrToX(bds, addr); int bdsY = addrToY(bds, addr); return
* Bounds.create(bdsX, bdsY, boxW / columns, ENTRY_HEIGHT); } }
*/
private void CalculateDisplayParameters(Graphics g, boolean HasDataIn) {
RecalculateParameters = false;
int addrBits = getAddrBits();
int dataBits = contents.getWidth();
int TotalWidth = (HasDataIn) ? Mem.SymbolWidth - 80
: Mem.SymbolWidth - 40;
int TotalHeight = (dataBits == 1) ? 16 : (dataBits * 20) - 6;
Font font = g.getFont();
FontMetrics fm = g.getFontMetrics(font);
AddrBlockSize = ((fm.stringWidth(StringUtil.toHexString(addrBits, 0)) + 9) / 10) * 10;
DataSize = fm.stringWidth(StringUtil.toHexString(dataBits, 0) + " ");
SpaceSize = fm.stringWidth(" ");
NrDataSymbolsEachLine = (TotalWidth - AddrBlockSize) / DataSize;
NrOfLines = (dataBits == 1) ? 1 : TotalHeight / (fm.getHeight() + 2);
int TotalShowableEntries = NrDataSymbolsEachLine * NrOfLines;
int TotalNrOfEntries = (1 << addrBits);
while (TotalShowableEntries > (TotalNrOfEntries + NrDataSymbolsEachLine - 1)) {
NrOfLines--;
TotalShowableEntries -= NrDataSymbolsEachLine;
}
if (NrOfLines == 0) {
NrOfLines = 1;
NrDataSymbolsEachLine = TotalNrOfEntries;
}
/* here we calculate to total x-sizes */
DataBlockSize = NrDataSymbolsEachLine * (DataSize);
int TotalSize = AddrBlockSize + DataBlockSize;
xOffset = (Mem.SymbolWidth / 2) - (TotalSize / 2);
/* Same calculations for the height */
CharHeight = fm.getHeight();
int BlockHeigt = NrOfLines * (CharHeight + 2);
yOffset = (dataBits * 10) - (BlockHeigt / 2);
if (yOffset > 5)
yOffset = 5;
}
@Override
public MemState clone() {
try {
MemState ret = (MemState) super.clone();
ret.contents = contents.clone();
ret.contents.addHexModelListener(ret);
return ret;
} catch (CloneNotSupportedException e) {
return null;
}
}
//
// methods for accessing data within memory
//
int getAddrBits() {
return contents.getLogLength();
}
//
// graphical methods
//
public long getAddressAt(int x, int y) {
/*
* This function returns the address of a data symbol inside the data
* block
*/
int ystart = ControlBlockHeight + yOffset;
int ystop = ystart + NrOfLines * (CharHeight + 2);
int xstart = 20 + xOffset + AddrBlockSize;
int xstop = xstart + DataBlockSize;
if ((x < xstart) | (x > xstop) | (y < ystart) | (y > ystop))
return -1;
x = x - xstart;
y = y - ystart;
int line = y / (CharHeight + 2);
int symbol = x / (DataSize);
long pointedAddr = curScroll + (line * NrDataSymbolsEachLine) + symbol;
return isValidAddr(pointedAddr) ? pointedAddr : getLastAddress();
}
public Bounds getBounds(long addr, Bounds bds) {
/* This function returns the rectangle shape around an item */
if (addr < 0) {
return Bounds.create(bds.getX() + 20 + xOffset, bds.getY()
+ ControlBlockHeight + yOffset, AddrBlockSize,
CharHeight + 2);
} else {
addr -= curScroll;
int line = ((int) addr) / NrDataSymbolsEachLine;
int item = ((int) addr) % NrDataSymbolsEachLine;
return Bounds.create(bds.getX() + 20 + xOffset + AddrBlockSize
+ item * (DataSize), bds.getY() + ControlBlockHeight
+ yOffset + line * (CharHeight + 2), DataSize,
CharHeight + 2);
}
}
public MemContents getContents() {
return contents;
}
long getCurrent() {
return curAddr;
}
//
// methods for manipulating cursor and scroll location
//
long getCursor() {
return cursorLoc;
}
int getDataBits() {
return contents.getWidth();
}
long getLastAddress() {
return (1L << contents.getLogLength()) - 1;
}
int GetNrOfLineItems() {
return NrDataSymbolsEachLine;
}
int GetNrOfLines() {
return NrOfLines;
}
long getScroll() {
return curScroll;
}
public boolean isSplitted() {
return false;
}
boolean isValidAddr(long addr) {
int addrBits = contents.getLogLength();
return addr >>> addrBits == 0;
}
public void metainfoChanged(HexModel source) {
setBits(contents.getLogLength(), contents.getWidth());
}
public void paint(Graphics g, int leftX, int topY, boolean HasDataIn,
int ControlBlockHeight) {
this.ControlBlockHeight = ControlBlockHeight;
topY += ControlBlockHeight;
if (RecalculateParameters)
CalculateDisplayParameters(g, HasDataIn);
int BlockHeigt = NrOfLines * (CharHeight + 2);
int TotalNrOfEntries = (1 << getAddrBits());
g.setColor(Color.LIGHT_GRAY);
g.fillRect(leftX + xOffset, topY + yOffset, DataBlockSize
+ AddrBlockSize, BlockHeigt);
g.setColor(Color.DARK_GRAY);
g.drawRect(leftX + xOffset + AddrBlockSize, topY + yOffset,
DataBlockSize, BlockHeigt);
g.setColor(Color.BLACK);
/* draw the addresses */
int addr = (int) curScroll;
if ((addr + (NrOfLines * NrDataSymbolsEachLine)) > TotalNrOfEntries) {
addr = TotalNrOfEntries - (NrOfLines * NrDataSymbolsEachLine);
if (addr < 0)
addr = 0;
curScroll = addr;
}
/* draw the contents */
int firsty = topY + yOffset + (CharHeight / 2) + 1;
int yinc = CharHeight + 2;
int firstx = leftX + xOffset + AddrBlockSize + (SpaceSize / 2)
+ ((DataSize - SpaceSize) / 2);
for (int i = 0; i < NrOfLines; i++) {
/* Draw address */
GraphicsUtil.drawText(g,
StringUtil.toHexString(getAddrBits(), addr), leftX
+ xOffset + (AddrBlockSize / 2), firsty + i
* (yinc), GraphicsUtil.H_CENTER,
GraphicsUtil.V_CENTER);
/* Draw data */
for (int j = 0; j < NrDataSymbolsEachLine; j++) {
int value = contents.get(addr + j);
if (isValidAddr(addr + j)) {
if ((addr + j) == curAddr) {
g.setColor(Color.DARK_GRAY);
g.fillRect(firstx + j * DataSize - (DataSize / 2) - 1,
firsty + i * yinc - (CharHeight / 2) - 1,
DataSize + 2, CharHeight + 2);
g.setColor(Color.WHITE);
GraphicsUtil.drawText(g, StringUtil.toHexString(
contents.getWidth(), value), firstx + j
* DataSize, firsty + i * yinc,
GraphicsUtil.H_CENTER, GraphicsUtil.V_CENTER);
g.setColor(Color.BLACK);
} else {
GraphicsUtil.drawText(g, StringUtil.toHexString(
contents.getWidth(), value), firstx + j
* DataSize, firsty + i * yinc,
GraphicsUtil.H_CENTER, GraphicsUtil.V_CENTER);
}
}
}
addr += NrDataSymbolsEachLine;
}
}
void scrollToShow(long addr) {
if (RecalculateParameters)
return;
if (isValidAddr(addr)) {
int NrOfDataItemsDisplayed = NrOfLines * NrDataSymbolsEachLine;
while (addr < curScroll) {
curScroll -= NrDataSymbolsEachLine;
if (curScroll < 0)
curScroll = 0;
}
while (addr >= (curScroll + NrOfDataItemsDisplayed)) {
curScroll += NrDataSymbolsEachLine;
}
}
}
//
// methods for accessing the address bits
//
private void setBits(int addrBits, int dataBits) {
RecalculateParameters = true;
if (contents == null) {
contents = MemContents.create(addrBits, dataBits);
} else {
contents.setDimensions(addrBits, dataBits);
}
cursorLoc = -1;
curAddr = -1;
curScroll = 0;
}
void setCurrent(long value) {
curAddr = isValidAddr(value) ? value : -1L;
}
void setCursor(long value) {
cursorLoc = isValidAddr(value) ? value : -1L;
}
void setScroll(long addr) {
if (RecalculateParameters)
return;
long maxAddr = (1 << getAddrBits())
- (NrOfLines * NrDataSymbolsEachLine);
if (addr > maxAddr) {
addr = maxAddr; // note: maxAddr could be negative
}
if (addr < 0) {
addr = 0;
}
curScroll = addr;
}
}