/**
/*
Rob Mayfield. IMSI @1997
The text window uses a small subset of HTML to display multiple color
in the text. This is done in the displayText class.
Eventually Multi font, size, style and color text box
**/
import java.awt.*;
public class textDisplay extends Canvas
{
String Text;
int width, height, left, top; // area of text box
java.awt.Color foreGround, backGround;
java.util.Vector dText = new java.util.Vector();
java.util.Vector dColor = new java.util.Vector();
int curPos = 0;
int viewLeftPos = 0;
int topLine = 0; // first line on screen
int prevTopLine = -1; // previous top line on screen. Used in checking if repaint needed.
int aveCharWidth = 0;
int textLengthMax = 0, textCharLenghtMax = 0;
int totalLines = 0;
int lineHeight = 0;
int lines = 0;
boolean first = true;
ViewSourceDialog parent;
//Color prevTopColor = Color.black;
Font topFont;
int wow=0;
textDisplay ()
{ super();
foreGround = Color.black;
backGround = Color.white;
this.parent = (ViewSourceDialog) getParent();
}
public void setText(String Str)
{
int jj=0;
Text = Str;
String S;
Color prevColor = foreGround; // set up first color for line 1
int cnt = 0;
while ((S = getNextString()) != null)
{
String trimStr = rTrim(S);
dText.addElement(trimStr); // add to Vector
boolean tag = false;
int cntChar = 0;
for (int ii = 0; ii< trimStr.length(); ii++)
{ if (trimStr.charAt(ii) == '<') tag = true;
if (trimStr.charAt(ii) == '>') tag = false;
if (!tag) cntChar++;
}
if (cntChar > textCharLenghtMax)
textCharLenghtMax = cntChar;
Color c;
if (cnt == 0)
{ // find start color for first line
String upStr = trimStr.toUpperCase();
int fPos, cPos;
if ((fPos=upStr.indexOf("<FONT")) > -1 && (cPos=upStr.indexOf("COLOR=")) > -1)
{ if (fPos != 0) // font not set in first chars
prevColor = foreGround;
else
prevColor = getFirstColor (trimStr);
}
else
prevColor = foreGround;
dColor.addElement(prevColor); // add the color to start line 0
}
else
{
dColor.addElement(prevColor);
prevColor = ((c=getEndColor (trimStr)) == null) ? prevColor : c;
}
//System.out.println("cnt: " + cnt
cnt++;
}
repaint();
}
// finds the next string delimited by HTML <br>
public String getNextString()
{ int Start = curPos;
int End = curPos;
boolean found = false;
if (Start > Text.length() || Text.length() == 0) return null;
while (curPos < Text.length())
{
char c = Text.charAt(curPos);
if (curPos+3 < Text.length() && Text.charAt(curPos) == '<' && (Text.charAt(curPos+1) == 'b' ||
Text.charAt(curPos+1) == 'B') && (Text.charAt(curPos+2) == 'r' || Text.charAt(curPos+2) == 'R')
&& Text.charAt(curPos+3) == '>')
{ End = curPos;
curPos += 4;
found = true;
break;
}
curPos++;
//c = 'a';
}
if (curPos == Text.length())
{ if (End == Start)
{ curPos++; // increment so next call to getNextString() will return null
return Text.substring(Start, curPos-1);
}
else return Text.substring(Start, End);
}
else if (End == Start)
{ if (found) return (" "); // return blank line (well almost blank with one space). we do this so calling routine reads another line.
return null;
}
else
{
return (Text.substring(Start, End));
}
}
public void resize (int width, int height)
{ this.width = width;
this.height = height;
repaint();
}
public synchronized void reshape (int left, int top, int width, int height)
{ this.left = left;
this.top = top;
this.width = width;
this.height = height;
super.reshape(left, top, width, height);
lines = 0; // reset the number of showing lines in text area
repaint();
}
public synchronized void setBackground(Color c)
{
super.setBackground(c);
backGround = c;
}
public synchronized void setForeground(Color c)
{
super.setForeground(c);
foreGround = c;
}
public void verticalScrollbarAction(int Action, Object arg)
{
int sPos = ((Integer) arg).intValue();
topLine = sPos;
if (topLine != prevTopLine)
repaint();
prevTopLine = topLine;
}
public void horizontalScrollbarAction(int Action, Object arg)
{
int sPos = ((Integer) arg).intValue();
viewLeftPos = -sPos * aveCharWidth;
repaint();
}
// get color for end of line by reading FONT tag
public Color getEndColor (String Str)
{
int fPos, cPos, pos = 0;
String upStr = Str.toUpperCase();
if ((fPos=upStr.lastIndexOf("<FONT")) > -1 && (cPos=upStr.lastIndexOf("COLOR=")) > -1)
{
cPos += 6;
if (Str.charAt(cPos)=='\"') cPos++; // find beginning of hex or long color number
if (Str.charAt(cPos)=='\'') cPos++; // find beginning of hex or long color number
if (Str.charAt(cPos)=='#')
{ cPos++; // find beginning of hex or long color number
int Start = cPos; // starting position of number
while (Str.charAt(cPos) != '\"' && Str.charAt(cPos) != ' ' && Str.charAt(cPos) != '\'') cPos++; // find end of number
String hexString = upStr.substring(Start, cPos); // get number as string
while (Str.charAt(cPos) != '>' && cPos < Str.length()) cPos++; // find end of number
if (hexString.length() != 6) return null;
int intColor = Integer.parseInt(hexString, 16); // convert from hex string to int
return (new Color(intColor)); // new color
}
else
return null;
}
else
return null;
}
// get color for beginning of each line
public Color getFirstColor (String Str)
{
int fPos, cPos, pos = 0;
String upStr = Str.toUpperCase();
if ((fPos=upStr.indexOf("<FONT", pos)) > -1 && (cPos=upStr.indexOf("COLOR=", pos)) > -1)
{
cPos += 6;
if (Str.charAt(cPos)=='\"') cPos++; // find beginning of hex or long color number
if (Str.charAt(cPos)=='\'') cPos++; // find beginning of hex or long color number
if (Str.charAt(cPos)=='#')
{ cPos++; // find beginning of hex or long color number
int Start = cPos; // starting position of number
while (Str.charAt(cPos) != '\"' && Str.charAt(cPos) != ' ' && Str.charAt(cPos) != '\'') cPos++; // find end of number
String hexString = upStr.substring(Start, cPos); // get number as string
while (Str.charAt(cPos) != '>' && cPos < Str.length()) cPos++; // find end of number
if (hexString.length() != 6) return null;
int intColor = Integer.parseInt(hexString, 16); // convert from hex string to int
return (new Color(intColor)); // new color
}
else
return null;
}
else
return null;
}
public void paint(java.awt.Graphics g)
{
String Str, resultStr, upStr, drawStr;
Font cFont = new Font("Courier", Font.BOLD, 12);
g.setFont(cFont);
//g.setColor(prevTopColor); // get default color
Color fg = foreGround;
FontMetrics fm = g.getFontMetrics(cFont);
if (aveCharWidth == 0) aveCharWidth = fm.stringWidth("M"); // get the average char width for incremental scrolling
if (lineHeight == 0) lineHeight = fm.getHeight(); // get the height of a line
if (lines == 0) lines = height/lineHeight;
int num = ((dText.size() - topLine) < lines) ? dText.size() - topLine : lines;
// cycle through the lines of text and draw to screen
for (int ii = 0; ii < num; ii++)
{
if (topLine > dText.size() - 1) break;
Str = (String)dText.elementAt(ii+topLine);
g.setColor((Color)dColor.elementAt(ii+topLine));
//g.setFont((Font)dFont.elementAt(ii+topLine));
int drawPos = 1; // starting position to draw string
upStr = Str.toUpperCase();
int cPos = -1;
int fPos = -1;
int pos = 0;
boolean printAsIs = false;
boolean foundFontTag = false;
// see if font or color change. If not just draw text for line, else draw in different font and color
while ((fPos=upStr.indexOf("<FONT", pos)) > -1 && (cPos=upStr.indexOf("COLOR=", pos)) > -1)
{ foundFontTag = true;
printAsIs = false;
cPos += 6;
if (Str.charAt(cPos)=='\"') cPos++; // find beginning of hex or long color number
if (Str.charAt(cPos)=='\'') cPos++; // find beginning of hex or long color number
if (Str.charAt(cPos)=='#') cPos++; // find beginning of hex or long color number
else
{ printAsIs = true;
break; // not a valid hex number ("#FF00FF" format)
}
int Start = cPos; // starting position of number
while (Str.charAt(cPos) != '\"' && Str.charAt(cPos) != ' ' && Str.charAt(cPos) != '\'') cPos++; // find end of number
String hexString = upStr.substring(Start, cPos); // get number as string
while (Str.charAt(cPos) != '>' && cPos < Str.length()) cPos++; // find end of number
if (hexString.length() != 6)
{ printAsIs = true;
break; // not a valid hex number ("#FF00FF" format)
}
drawStr = Str.substring(pos, fPos);
g.drawString(drawStr, drawPos+viewLeftPos, lineHeight * (ii+1)); // draw string in current color
drawPos += fm.stringWidth(drawStr);
int intColor = Integer.parseInt(hexString, 16); // convert from hex string to int
fg = new Color(intColor); // set new color
g.setColor(fg); // return to entry color
pos = cPos+1;
}
if (foundFontTag)
{ g.setColor(fg); // return to entry color
g.drawString(Str.substring(pos, Str.length()), drawPos+viewLeftPos, lineHeight * (ii+1)); // draw string in current color
if (first) // find max length of string
{ int wid = drawPos + fm.stringWidth(Str.substring(pos, Str.length())); // add last segment to length
if (wid > textLengthMax)
textLengthMax = wid;
}
}
if (!foundFontTag || printAsIs)
{ if (first) // find max length of string
{ int wid = fm.stringWidth(Str);
if (wid > textLengthMax)
textLengthMax = wid;
}
g.drawString (Str, 1+viewLeftPos, lineHeight * (ii+1));
}
foreGround = fg; // return to entry color
//if (ii == 0) prevTopColor = fg;
}
if (first)
{
textLengthMax = (textLengthMax + 30) / aveCharWidth; // add slop space for scrolling
if (textCharLenghtMax > textLengthMax) textLengthMax = textCharLenghtMax;
ViewSourceDialog parent = (ViewSourceDialog) getParent();
parent.horizontalScrollbar.setPageIncrement(textLengthMax/4);
parent.horizontalScrollbar.setValues(0, 6, 0, textLengthMax);
totalLines = dText.size();
parent.verticalScrollbar.setPageIncrement(totalLines/4);
parent.verticalScrollbar.setValues(0, 6, 0, totalLines);
}
first = false;
}
public String rTrim(String Str)
{ int iLen, len;
len = iLen = Str.length() - 1;
int st = 0;
while ((len > 0) && (Str.charAt(len) <= ' '))
{
len--;
}
return (len < iLen) ? Str.substring(st, len+1) : Str;
}
} // End of class textDisplay
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