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307
Java/flob/RankTextView.zob
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307
Java/flob/RankTextView.zob
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/*
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VStreamRaster.zob
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*
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* Copyright (c) 1999-2000, Ted Nelson and Tuomas Lukka
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*
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* You may use and distribute under the terms of either the GNU Lesser
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* General Public License, either version 2 of the license or,
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* at your choice, any later version. Alternatively, you may use and
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* distribute under the terms of the XPL.
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*
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* See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of
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* the licenses.
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*
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* This software 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 README
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* file for more details.
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*
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*/
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/*
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* Written by Tuomas Lukka
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*/
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package org.gzigzag;
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import java.awt.*;
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import java.awt.event.*;
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import java.util.*;
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/** A raster of flowing text.
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* The FlobRaster is implemented mostly for testing purposes - this class
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* would mostly be called from another raster.
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*/
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public class RankTextView implements FlobView, ZOb {
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public static final String rcsid = "$Id$";
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public static boolean dbg = false;
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static final void p(String s) { if(dbg) System.out.println(s); }
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static final void pa(String s) { System.out.println(s); }
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STRUCTPARAMS {
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/** The width of the flowing text at maximum. Negative value
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means that the width of the window should be used. */
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int width
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= 300;
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/** The font for the maximal line. */
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ScalableFont font
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= new ScalableFont("SansSerif", Font.PLAIN, 16);
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/** The half-width of the bulge. */
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int bulge
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= 10;
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/** Whether to show cuts. */
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boolean cuts
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= true;
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/** Which dimension to use. */
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String dim
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= "d.2";
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/** Whether to billow the text. */
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boolean billow
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= true;
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/** Whether to show XOR cursors. */
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boolean xor
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= true;
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/** The backround colour for all flobs (or null if determined
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from the cursors. */
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Color bgcolor
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= null;
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}
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protected Font getfont(int scale) {
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return font.getFont(scale);
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}
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protected FontMetrics getfontmet(int scale) {
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return font.getFontMetrics(scale);
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}
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SimpleLineInfo.Layout layb = new LayBillow();
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SimpleLineInfo.Layout layf = new LayFlat();
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SimpleLineBreaker brk = new SimpleLineBreaker();
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protected int getFontScale(int line, boolean doBillow) {
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int w = (doBillow ? layb : layf).getWidth(line);
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return (1000*w)/width;
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}
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class LayBillow implements SimpleLineInfo.Layout {
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public final FontMetrics getFontMetrics(int line) {
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return getfontmet(getFontScale(line, true));
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}
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public final int getWidth(int line) {
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if(bulge <= 0) return width;
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float bfunc = (float)(
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1.0/ ( 1 + (line * (float)line) / (bulge * bulge) ) );
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return (int)(bfunc * width);
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}
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public final int getCenterLine() {
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return 0;
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}
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}
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class LayFlat implements SimpleLineInfo.Layout {
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public final FontMetrics getFontMetrics(int line) {
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return getfontmet(1000);
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}
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public final int getWidth(int line) {
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return width;
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}
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public final int getCenterLine() {
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return 0;
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}
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}
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/** Raster an area.
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* Returns a bounding rectangle for the text plotted.
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*/
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public Rectangle raster(FlobSet into, ZZCell c, int offs, boolean doBillow,
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int startx, int starty, int xormode) {
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if (width < 0) width = into.getSize().width;
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Rectangle res = new Rectangle();
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// read the whole string first
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int soffs = -1;
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StringBuffer s = new StringBuffer();
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ZZCell head = c.h(dim, -1);
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boolean first = true;
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for(ZZCell h = head;
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h != null && (first || h!=head); h = h.s(dim, 1)) {
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first = false;
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if(h == c)
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soffs = offs + s.length();
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s.append(h.getText());
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}
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if(soffs < 0)
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throw new ZZError("??? ARGH");
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String txt = s.toString();
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SimpleLineInfo sli = new SimpleLineInfo(txt, soffs,
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(doBillow?layb:layf));
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int[] linestops = brk.breakLines(sli);
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p("Breaklines: "+offs);
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for(int i=0; i<linestops.length; i++)
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p("Line: "+linestops[i]);
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for(int i=-10; i<=10; i++) {
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p("WFM: "+layb.getWidth(i)+" "+getFontScale(i, doBillow));
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}
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int ctr = - linestops[0];
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/** Current Y offset for the loop. */
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int cury = starty;
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// Calculate the starting Y coordinate
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for(int i = ctr; i>=0; i--) {
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cury -= getfontmet(getFontScale(i-ctr, doBillow)).getHeight();
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}
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res.x = startx; res.width = width;
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res.y = cury;
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// Downwards from center.
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// start-splitcellflob needs very careful attention.
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/** Current offset in the whole string.
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*/
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int curoffs = 0;
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/** Current line.
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*/
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int curline = 0;
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/** Current X-coordinate.
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*/
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int curx = startx;
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int fi = getFontScale(curline - ctr, doBillow);
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Font f = getfont(fi);
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FontMetrics fm = getfontmet(fi);
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SplitCellFlob1 latest = null;
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first = true;
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for(ZZCell h = head;
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h != null && (first || h != head); h = h.s(dim, 1)) {
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first = false;
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final String st = h.getText();
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final int len = st.length();
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int nth = 0;
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SplitCellFlob1 parent = null;
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// Find the cursors on this cell. Only one is shown.
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int curs = ZZCursorReal.NO_OFFSET;
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ZZCell ccurs = h;
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while((ccurs = ccurs.s("d.cursor", 1))!=null) {
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curs = ZZCursorReal.getOffs(ccurs);
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if(curs != ZZCursorReal.NO_OFFSET) break;
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}
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if(h.s("d.cut", 1) != null) {
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// There was a cut.
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into.add(new LineDecor(curx, cury, curx, cury+fm.getHeight(),
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Color.red, 1));
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}
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while(curoffs + len - nth > linestops[curline+1]) {
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p("Parent: "+nth+" "+len+" "+curline+" "+linestops[curline+1]);
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SplitCellFlob1 cur = new SplitCellFlob1(
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curx, cury, 100, fm.stringWidth(st.substring(nth,
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nth+
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(linestops[curline+1] - curoffs))),
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fm.getHeight(), h, f, fm, parent,
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nth, linestops[curline+1]-curoffs, xormode, bgcolor);
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if(bgcolor == null) cur.showCursor();
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cur.setPrev(latest); latest = cur;
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if(curs != ZZCursorReal.NO_OFFSET)
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addCurs(into, cur, curs);
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parent = cur;
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into.add(cur);
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// Split it.
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nth += linestops[curline+1] - curoffs;
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curoffs = linestops[curline+1];
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curline ++;
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cury += fm.getHeight();
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curx = startx;
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fi = getFontScale(curline - ctr, doBillow);
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f = getfont(fi);
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fm = getfontmet(fi);
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if(curline >= linestops.length - 1) {
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p("LAST LINE: ALL OUT");
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break;
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}
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}
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if(curline >= linestops.length - 1)
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break;
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p("Last: "+nth+" "+len+" "+curline+" "+linestops[curline+1]+" "+
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st.length());
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int w = 0;
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String substr = st.substring(nth, len);
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p("Substr: "+substr);
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SplitCellFlob1 last = new SplitCellFlob1(
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curx, cury, 100,
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(w = fm.stringWidth(substr)),
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fm.getHeight(), h, f, fm, parent, nth, len-nth, xormode, bgcolor);
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if(bgcolor == null) last.showCursor();
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last.setPrev(latest); latest = last;
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if(curs != ZZCursorReal.NO_OFFSET)
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addCurs(into, last, curs);
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curoffs += len-nth;
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curx += w;
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into.add(last);
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}
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p("FINISHED");
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res.height = cury - res.y + fm.getHeight();
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return res;
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}
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public Rectangle raster(FlobSet into, ZZCell c, int offs, boolean doBillow,
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int startx, int starty) {
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return raster(into, c, offs, doBillow, startx, starty,
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SplitCellFlob1.XOR_NO);
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}
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private void addCurs(FlobSet into, SplitCellFlob1 sf, int ind) {
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if(!(ind >= sf.start && ind <= sf.start + sf.n))
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return;
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int x = sf.getStrX(ind);
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if(x >= 0)
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into.add(new LineDecor(x, sf.y, x, sf.y+sf.h,
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Color.black, sf.d));
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}
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public void raster(FlobSet into, FlobFactory fact,
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ZZCell view, String[] dims, ZZCell accursed) {
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ZZCell c = ZZCursorReal.get(view);
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int offs = ZZCursorReal.getOffs(view);
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int xormode = SplitCellFlob1.XOR_LINE;
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if(offs == ZZCursor.NO_OFFSET) {
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offs = 0;
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xormode = SplitCellFlob1.XOR_SOLID;
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}
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if(!xor) xormode = SplitCellFlob1.XOR_NO;
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Dimension d = into.getSize();
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int cy = d.height / 2;
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raster(into, c, offs, billow, 0, cy, xormode);
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}
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// public VStreamRaster() { }
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}
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// vim: set syntax=java :
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