foray-commit Mailing List for FOray (Page 14)

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Revision: 13553
          http://sourceforge.net/p/foray/code/13553
Author:   victormote
Date:     2025-05-01 12:24:24 +0000 (Thu, 01 May 2025)
Log Message:
-----------
Steps toward GSUB table parsing in new scheme.

Modified Paths:
--------------
    trunk/foray/foray-font/src/main/java/org/foray/font/ttf/TrueTypeFont.java
    trunk/foray/foray-font/src/main/java/org/foray/font/ttf/table/GsubTable.java

Added Paths:
-----------
    trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttf/GsubTableParser.java
    trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttfHandler/GsubTableHandler.java

Modified: trunk/foray/foray-font/src/main/java/org/foray/font/ttf/TrueTypeFont.java
===================================================================

--- trunk/foray/foray-font/src/main/java/org/foray/font/ttf/TrueTypeFont.java	2025-05-01 11:20:09 UTC (rev 13552)
+++ trunk/foray/foray-font/src/main/java/org/foray/font/ttf/TrueTypeFont.java	2025-05-01 12:24:24 UTC (rev 13553)
@@ -405,6 +405,10 @@
         dirEntry = ttfTableDir.getTableDirectoryEntry("GSUB");
         if (dirEntry != null) {
             font.gsubTable = GsubTable.parse(dirEntry, raInput);
+//            final ParserKit<GsubTable, GsubTableHandler> contentHandler = GsubTable.createContentHandler();
+//            final GsubTableParser parser = new GsubTableParser();
+//            parser.parse(raInput, dirEntry.getOffset(), contentHandler.getHandler());
+//            font.gsubTable = contentHandler.getTable();
         }
 
         dirEntry = ttfTableDir.getTableDirectoryEntry("JSTF");

Modified: trunk/foray/foray-font/src/main/java/org/foray/font/ttf/table/GsubTable.java
===================================================================
--- trunk/foray/foray-font/src/main/java/org/foray/font/ttf/table/GsubTable.java	2025-05-01 11:20:09 UTC (rev 13552)
+++ trunk/foray/foray-font/src/main/java/org/foray/font/ttf/table/GsubTable.java	2025-05-01 12:24:24 UTC (rev 13553)
@@ -30,8 +30,10 @@
 
 import org.foray.font.ttf.OtfFeature;
 import org.foray.font.ttf.OtfScript;
+import org.foray.font.ttf.ParserKit;
 import org.foray.font.ttf.TtfOffsetTableRecord;
 import org.foray.fontParse.ttf.TtfRandomAccessInput;
+import org.foray.fontParse.ttfHandler.GsubTableHandler;
 import org.foray.primitive.sequence.IntArrayBuilder;
 
 import org.axsl.font.FontContext;
@@ -48,6 +50,32 @@
  */
 public class GsubTable extends AbstractOtfLayoutTable {
 
+    /**
+     * The handler of events from the parser.
+     */
+    private final class ContentHandler implements GsubTableHandler {
+
+        /** The table instance being created. */
+        @SuppressWarnings("unused")
+        private GsubTable table;
+
+        /**
+         * Constructor.
+         * @param table The table instance being created.
+         */
+        private ContentHandler(final GsubTable table) {
+            this.table = table;
+        }
+    }
+
+
+
+
+
+
+
+
+
     /** The lookup list. */
     private List<GsubLookup> lookupList;
 
@@ -61,6 +89,16 @@
     }
 
     /**
+     * Creates a table instance and a content handler for that instance.
+     * @return A new content handler.
+     */
+    public static ParserKit<GsubTable, GsubTableHandler> createContentHandler() {
+        final GsubTable table = new GsubTable(null, null);
+        final GsubTableHandler handler = table.new ContentHandler(table);
+        return new ParserKit<GsubTable, GsubTableHandler>(table, handler);
+    }
+
+    /**
      * Parse the table from the table content.
      * @param offsetRecord The parent offset table record.
      * @param raInput The input which is being parsed.

Added: trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttf/GsubTableParser.java
===================================================================
--- trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttf/GsubTableParser.java	                        (rev 0)
+++ trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttf/GsubTableParser.java	2025-05-01 12:24:24 UTC (rev 13553)
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2025 The FOray Project.
+ *      http://www.foray.org
+ *
+ * Licensed 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.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This work is in part derived from the following work(s), used with the
+ * permission of the licensor:
+ *      Apache FOP, licensed by the Apache Software Foundation
+ *
+ */
+
+/*
+ * $LastChangedRevision$
+ * $LastChangedDate$
+ * $LastChangedBy$
+ */
+
+package org.foray.fontParse.ttf;
+
+import org.foray.fontParse.TableParser;
+import org.foray.fontParse.ttfHandler.GsubTableHandler;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+
+/**
+ * Parses a TTF "GSUB" table.
+ */
+public class GsubTableParser extends TableParser<GsubTableHandler> {
+
+    /** Constant for the version 1.1 cutoff. */
+    private static final BigDecimal VERSION_1_1 = new BigDecimal("1.1");
+
+    @Override
+    public void parse(final TtfRandomAccessInput input, final int offset, final GsubTableHandler handler)
+            throws IOException {
+        input.seek(offset);
+
+        /* GSUB Header, Version 1.0. */
+        final short majorVersion = input.read_uint16();
+        handler.majorVersion(majorVersion);
+        final short minorVersion = input.read_uint16();
+        handler.minorVersion(minorVersion);
+        final BigDecimal version = new BigDecimal(majorVersion + "." + minorVersion);
+
+        final short scriptListOffset = input.read_Offset16();
+        handler.scriptListOffset(scriptListOffset);
+        final short featureListOffset = input.read_Offset16();
+        handler.featureListOffset(featureListOffset);
+        final short lookupListOffset = input.read_Offset16();
+        handler.lookupListOffset(lookupListOffset);
+
+
+        /* GSUB Header, Version 1.1. */
+        @SuppressWarnings("unused")
+        final int featureVariationsOffset;
+        if (version.compareTo(VERSION_1_1) >= 0) {
+            featureVariationsOffset = input.readUnsignedShort();
+        } else {
+            featureVariationsOffset = -1;
+        }
+
+        /* TODO: Complete this. */
+    }
+
+}


Property changes on: trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttf/GsubTableParser.java
___________________________________________________________________
Added: svn:keywords
## -0,0 +1 ##
+Author Date Id Rev
\ No newline at end of property
Added: trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttfHandler/GsubTableHandler.java
===================================================================
--- trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttfHandler/GsubTableHandler.java	                        (rev 0)
+++ trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttfHandler/GsubTableHandler.java	2025-05-01 12:24:24 UTC (rev 13553)
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2025 The FOray Project.
+ *      http://www.foray.org
+ *
+ * Licensed 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.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This work is in part derived from the following work(s), used with the
+ * permission of the licensor:
+ *      Apache FOP, licensed by the Apache Software Foundation
+ *
+ */
+
+/*
+ * $LastChangedRevision$
+ * $LastChangedDate$
+ * $LastChangedBy$
+ */
+
+package org.foray.fontParse.ttfHandler;
+
+import org.foray.fontParse.FontContentHandler;
+import org.foray.fontParse.ttf.GsubTableParser;
+
+import org.checkerframework.checker.signedness.qual.Unsigned;
+
+/**
+ * Implementations catch and handle the output from {@link GsubTableParser}.
+ */
+public interface GsubTableHandler extends FontContentHandler {
+
+    default void majorVersion(@Unsigned short value) { return; }
+    default void minorVersion(@Unsigned short value) { return; }
+    default void scriptListOffset(@Unsigned short value) { return; }
+    default void featureListOffset(@Unsigned short value) { return; }
+    default void lookupListOffset(@Unsigned short value) { return; }
+
+    default void featureVariationsOffset(@Unsigned int value) { return; }
+}


Property changes on: trunk/foray/foray-font-parse/src/main/java/org/foray/fontParse/ttfHandler/GsubTableHandler.java
___________________________________________________________________
Added: svn:keywords
## -0,0 +1 ##
+Author Date Id Rev
\ No newline at end of property
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