/*
* Copyright (C) 2012-2015 Oleg Dolya
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>
*/
package com.watabou.noosa;
import java.util.ArrayList;
import java.util.regex.Pattern;
import android.graphics.RectF;
import com.watabou.glwrap.Quad;
import com.watabou.utils.PointF;
public class BitmapTextMultiline extends BitmapText {
public int maxWidth = Integer.MAX_VALUE;
protected static final Pattern PARAGRAPH = Pattern.compile( "\n" );
protected static final Pattern WORD = Pattern.compile( "\\s+" );
protected float spaceSize;
public int nLines = 0;
public boolean[] mask;
public BitmapTextMultiline( Font font ) {
this( "", font );
}
public BitmapTextMultiline( String text, Font font ) {
super( text, font );
spaceSize = font.width( font.get( ' ' ) );
}
@Override
protected void updateVertices() {
if (text == null) {
text = "";
}
quads = Quad.createSet( text.length() );
realLength = 0;
// This object controls lines breaking
SymbolWriter writer = new SymbolWriter();
// Word size
PointF metrics = new PointF();
String paragraphs[] = PARAGRAPH.split( text );
// Current character (used in masking)
int pos = 0;
for (int i=0; i < paragraphs.length; i++) {
String[] words = WORD.split( paragraphs[i] );
for (int j=0; j < words.length; j++) {
String word = words[j];
if (word.length() == 0) {
// This case is possible when there are
// several spaces coming along
continue;
}
getWordMetrics( word, metrics );
writer.addSymbol( metrics.x, metrics.y );
int length = word.length();
float shift = 0; // Position in pixels relative to the beginning of the word
for (int k=0; k < length; k++) {
RectF rect = font.get( word.charAt( k ) );
float w = font.width( rect );
float h = font.height( rect );
if (mask == null || mask[pos]) {
vertices[0] = writer.x + shift;
vertices[1] = writer.y;
vertices[2] = rect.left;
vertices[3] = rect.top;
vertices[4] = writer.x + shift + w;
vertices[5] = writer.y;
vertices[6] = rect.right;
vertices[7] = rect.top;
vertices[8] = writer.x + shift + w;
vertices[9] = writer.y + h;
vertices[10] = rect.right;
vertices[11] = rect.bottom;
vertices[12] = writer.x + shift;
vertices[13] = writer.y + h;
vertices[14] = rect.left;
vertices[15] = rect.bottom;
quads.put( vertices );
realLength++;
}
shift += w + font.tracking;
pos++;
}
writer.addSpace( spaceSize );
}
writer.newLine( 0, font.lineHeight );
}
nLines = writer.nLines();
dirty = false;
}
private void getWordMetrics( String word, PointF metrics ) {
float w = 0;
float h = 0;
int length = word.length();
for (int i=0; i < length; i++) {
RectF rect = font.get( word.charAt( i ) );
w += font.width( rect ) + (w > 0 ? font.tracking : 0);
h = Math.max( h, font.height( rect ) );
}
metrics.set( w, h );
}
@Override
public void measure() {
SymbolWriter writer = new SymbolWriter();
PointF metrics = new PointF();
String paragraphs[] = PARAGRAPH.split( text );
for (int i=0; i < paragraphs.length; i++) {
String[] words = WORD.split( paragraphs[i] );
for (int j=0; j < words.length; j++) {
if (j > 0) {
writer.addSpace( spaceSize );
}
String word = words[j];
if (word.length() == 0) {
continue;
}
getWordMetrics( word, metrics );
writer.addSymbol( metrics.x, metrics.y );
}
writer.newLine( 0, font.lineHeight );
}
width = writer.width;
height = writer.height;
nLines = writer.nLines();
}
@Override
public float baseLine() {
return (height - font.lineHeight + font.baseLine) * scale.y;
}
private class SymbolWriter {
public float width = 0;
public float height = 0;
public int nLines = 0;
public float lineWidth = 0;
public float lineHeight = 0;
public float x = 0;
public float y = 0;
public void addSymbol( float w, float h ) {
if (lineWidth > 0 && lineWidth + font.tracking + w > maxWidth / scale.x) {
newLine( w, h );
} else {
x = lineWidth;
lineWidth += (lineWidth > 0 ? font.tracking : 0) + w;
if (h > lineHeight) {
lineHeight = h;
}
}
}
public void addSpace( float w ) {
if (lineWidth > 0 && lineWidth + font.tracking + w > maxWidth / scale.x) {
newLine( 0, 0 );
} else {
x = lineWidth;
lineWidth += (lineWidth > 0 ? font.tracking : 0) + w;
}
}
public void newLine( float w, float h ) {
height += lineHeight;
if (width < lineWidth) {
width = lineWidth;
}
lineWidth = w;
lineHeight = h;
x = 0;
y = height;
nLines++;
}
public int nLines() {
return x == 0 ? nLines : nLines+1;
}
}
public class LineSplitter {
private ArrayList<BitmapText> lines;
private StringBuilder curLine;
private float curLineWidth;
private PointF metrics = new PointF();
private void newLine( String str, float width ) {
BitmapText txt = new BitmapText( curLine.toString(), font );
txt.scale.set( scale.x );
lines.add( txt );
curLine = new StringBuilder( str );
curLineWidth = width;
}
private void append( String str, float width ) {
curLineWidth += (curLineWidth > 0 ? font.tracking : 0) + width;
curLine.append( str );
}
public ArrayList<BitmapText> split() {
lines = new ArrayList<BitmapText>();
curLine = new StringBuilder();
curLineWidth = 0;
String paragraphs[] = PARAGRAPH.split( text );
for (int i=0; i < paragraphs.length; i++) {
String[] words = WORD.split( paragraphs[i] );
for (int j=0; j < words.length; j++) {
String word = words[j];
if (word.length() == 0) {
continue;
}
getWordMetrics( word, metrics );
if (curLineWidth > 0 && curLineWidth + font.tracking + metrics.x > maxWidth / scale.x) {
newLine( word, metrics.x );
} else {
append( word, metrics.x );
}
if (curLineWidth > 0 && curLineWidth + font.tracking + spaceSize > maxWidth / scale.x) {
newLine( "", 0 );
} else {
append( " ", spaceSize );
}
}
newLine( "", 0 );
}
return lines;
}
}
}
