diff options
Diffstat (limited to 'src/java/org/apache/fop/text/linebreak/LineBreakStatus.java')
| -rw-r--r-- | src/java/org/apache/fop/text/linebreak/LineBreakStatus.java | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/src/java/org/apache/fop/text/linebreak/LineBreakStatus.java b/src/java/org/apache/fop/text/linebreak/LineBreakStatus.java index 94e018c75..15f3434d9 100644 --- a/src/java/org/apache/fop/text/linebreak/LineBreakStatus.java +++ b/src/java/org/apache/fop/text/linebreak/LineBreakStatus.java @@ -1,13 +1,13 @@ -/* +/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at - * + * * http://www.apache.org/licenses/LICENSE-2.0 - * + * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. @@ -48,8 +48,8 @@ public class LineBreakStatus { public LineBreakStatus() { reset(); } - - + + /** * Reset the status. * This method will reset the status to the initial state. It is meant @@ -63,44 +63,44 @@ public class LineBreakStatus { /** * Check whether a line break may happen according to the rules described in * the <a href="http://unicode.org/reports/tr14/#Algorithm">Unicode Line Breaking Algorithm</a>. - * The function returns the line breaking status of the point <em>before</em> the given character. - * The algorithm is the table-driven algorithm, as described in + * The function returns the line breaking status of the point <em>before</em> the given character. + * The algorithm is the table-driven algorithm, as described in * <a href="http://unicode.org/reports/tr14/#PairBasedImplementation"> * Unicode Technical Report #14</a>. * The pair table is taken from {@link LineBreakUtils}. - * + * * TODO: Better handling for AI, SA, SG and XX line break classes. - * + * * @param c the character to check * @return the break action to be taken - * one of: {@link #DIRECT_BREAK}, - * {@link #INDIRECT_BREAK}, - * {@link #COMBINING_INDIRECT_BREAK}, + * one of: {@link #DIRECT_BREAK}, + * {@link #INDIRECT_BREAK}, + * {@link #COMBINING_INDIRECT_BREAK}, * {@link #COMBINING_PROHIBITED_BREAK}, * {@link #PROHIBITED_BREAK}, * {@link #EXPLICIT_BREAK} */ public byte nextChar(char c) { - + byte currentClass = LineBreakUtils.getLineBreakProperty(c); - + /* Initial conversions */ switch (currentClass) { case LineBreakUtils.LINE_BREAK_PROPERTY_AI: case LineBreakUtils.LINE_BREAK_PROPERTY_SG: case LineBreakUtils.LINE_BREAK_PROPERTY_XX: - // LB 1: Resolve AI, ... SG and XX into other line breaking classes + // LB 1: Resolve AI, ... SG and XX into other line breaking classes // depending on criteria outside the scope of this algorithm. - // In the absence of such criteria, it is recommended that + // In the absence of such criteria, it is recommended that // classes AI, ... SG and XX be resolved to AL currentClass = LineBreakUtils.LINE_BREAK_PROPERTY_AL; break; - + case LineBreakUtils.LINE_BREAK_PROPERTY_SA: - // LB 1: Resolve ... SA ... into other line breaking classes + // LB 1: Resolve ... SA ... into other line breaking classes // depending on criteria outside the scope of this algorithm. - // In the absence of such criteria, it is recommended that - // ... SA be resolved to AL, except that characters of + // In the absence of such criteria, it is recommended that + // ... SA be resolved to AL, except that characters of // class SA that have General_Category Mn or Mc be resolved to CM switch (Character.getType(c)) { case Character.COMBINING_SPACING_MARK: //General_Category "Mc" @@ -110,11 +110,11 @@ public class LineBreakStatus { default: currentClass = LineBreakUtils.LINE_BREAK_PROPERTY_AL; } - + default: //nop } - + /* Check 1: First character or initial character after a reset/mandatory break? */ switch (leftClass) { case -1: @@ -126,7 +126,7 @@ public class LineBreakStatus { } // LB 2: Never break at the start of text return PROHIBITED_BREAK; - + case LineBreakUtils.LINE_BREAK_PROPERTY_BK: case LineBreakUtils.LINE_BREAK_PROPERTY_LF: case LineBreakUtils.LINE_BREAK_PROPERTY_NL: @@ -136,9 +136,9 @@ public class LineBreakStatus { reset(); leftClass = currentClass; return EXPLICIT_BREAK; - + case LineBreakUtils.LINE_BREAK_PROPERTY_CR: - //first character after a carriage return: + //first character after a carriage return: // LB 5: Treat CR followed by LF, as well as CR ... as hard line breaks // If current is LF, then fall through to Check 2 (see below), // and the hard break will be signaled for the character after LF (see above) @@ -147,11 +147,11 @@ public class LineBreakStatus { leftClass = currentClass; return EXPLICIT_BREAK; } - + default: //nop } - + /* Check 2: current is a mandatory break or space? */ switch (currentClass) { case LineBreakUtils.LINE_BREAK_PROPERTY_BK: @@ -161,17 +161,17 @@ public class LineBreakStatus { // LB 6: Do not break before a hard break leftClass = currentClass; return PROHIBITED_BREAK; - + case LineBreakUtils.LINE_BREAK_PROPERTY_SP: // LB 7: Do not break before spaces ... // Zero-width spaces are in the pair-table (see below) hadSpace = true; return PROHIBITED_BREAK; - + default: //nop } - + /* Normal treatment, if the first two checks did not return */ boolean savedHadSpace = hadSpace; hadSpace = false; @@ -181,7 +181,7 @@ public class LineBreakStatus { case DIRECT_BREAK: leftClass = currentClass; return breakAction; - + case INDIRECT_BREAK: leftClass = currentClass; if (savedHadSpace) { @@ -189,7 +189,7 @@ public class LineBreakStatus { } else { return PROHIBITED_BREAK; } - + case COMBINING_INDIRECT_BREAK: if (savedHadSpace) { leftClass = currentClass; @@ -197,19 +197,19 @@ public class LineBreakStatus { } else { return PROHIBITED_BREAK; } - + case COMBINING_PROHIBITED_BREAK: if (savedHadSpace) { leftClass = currentClass; } return COMBINING_PROHIBITED_BREAK; - + default: assert false; return breakAction; } } - + /** * for debugging only */ |