start improving handling of resources in HSLF. PPFont object represents a font in a presenatation.

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@648203 13f79535-47bb-0310-9956-ffa450edef68

src/scratchpad/src/org/apache/poi/hslf/model/PPFont.java

@@ -0,0 +1,243 @@
+/* ====================================================================
+   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.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+
+package org.apache.poi.hslf.model;
+
+import org.apache.poi.hslf.record.FontEntityAtom;
+
+/**
+ * Represents a Font used in a presenation.
+ * <p>
+ * In PowerPoint Font is a shared resource and can be shared among text object in the presentation.
+ * </p>
+ * Some commonly used fonts are predefined in static constants. 
+ *
+ * @author Yegor Kozlov
+ */
+public class PPFont {
+    /**
+     * ANSI character set
+     */
+    public final static byte ANSI_CHARSET = 0;
+
+    /**
+     * Default character set.
+     */
+    public final static byte DEFAULT_CHARSET = 1;
+
+    /**
+     * Symbol character set
+     */
+    public final static byte SYMBOL_CHARSET = 2;
+
+
+    /**
+     * Constants for the pitch and family of the font.
+     * The two low-order bits specify the pitch of the font and can be one of the following values
+     */
+    public final static byte DEFAULT_PITCH  = 0;
+    public final static byte FIXED_PITCH    = 1;
+    public final static byte VARIABLE_PITCH = 2;
+
+    /**
+     * Don't care or don't know.
+     */
+    public final static byte FF_DONTCARE    = 0;
+    /**
+     * Fonts with variable stroke width (proportional) and with serifs. Times New Roman is an example.
+     */
+    public final static byte FF_ROMAN       = 16;
+    /**
+     * Fonts with variable stroke width (proportional) and without serifs. Arial is an example.
+     */
+    public final static byte FF_SWISS       = 32;
+    /**
+     * Fonts designed to look like handwriting. Script and Cursive are examples.
+     */
+    public final static byte FF_SCRIPT      = 64;
+    /**
+     * Fonts with constant stroke width (monospace), with or without serifs.
+     * Monospace fonts are usually modern. CourierNew is an example
+     */
+    public final static byte FF_MODERN      = 48;
+    /**
+     * Novelty fonts. Old English is an example
+     */
+    public final static byte FF_DECORATIVE  = 80;
+
+
+    protected int charset;
+    protected int type;
+    protected int flags;
+    protected int pitch;
+    protected String name;
+
+    /**
+     * Creates a new instance of PPFont
+     */
+    public PPFont(){
+
+    }
+
+    /**
+     * Creates a new instance of PPFont and initialize it from the supplied font atom
+     */
+    public PPFont(FontEntityAtom fontAtom){
+        name = fontAtom.getFontName();
+        charset = fontAtom.getCharSet();
+        type = fontAtom.getFontType();
+        flags = fontAtom.getFontFlags();
+        pitch = fontAtom.getPitchAndFamily();
+    }
+
+    /**
+     * set the name for the font (i.e. Arial)
+     *
+     * @param val  String representing the name of the font to use
+     */
+     public void setFontName(String val){
+        name = val;
+    }
+
+    /**
+     * get the name for the font (i.e. Arial)
+     *
+     * @return String representing the name of the font to use
+     */
+    public String getFontName(){
+        return name;
+    }
+
+    /**
+     * set the character set
+     *
+     * @param val - characterset
+     */
+    public void setCharSet(int val){
+        charset = val;
+    }
+
+    /**
+     * get the character set
+     *
+     * @return charset - characterset
+     */
+    public int getCharSet(){
+        return charset;
+    }
+
+    /**
+     * set the font flags
+     * Bit 1: If set, font is subsetted
+     *
+     * @param val - the font flags
+     */
+    public void setFontFlags(int val){
+        flags = val;
+    }
+
+    /**
+     * get the character set
+     * Bit 1: If set, font is subsetted
+     *
+     * @return the font flags
+     */
+    public int getFontFlags(){
+        return flags;
+    }
+
+    /**
+     * set the font type
+     * <p>
+     * Bit 1: Raster Font
+     * Bit 2: Device Font
+     * Bit 3: TrueType Font
+     * </p>
+     *
+     * @param val - the font type
+     */
+    public void setFontType(int val){
+        type = val;
+    }
+
+    /**
+     * get the font type
+     * <p>
+     * Bit 1: Raster Font
+     * Bit 2: Device Font
+     * Bit 3: TrueType Font
+     * </p>
+     *
+     * @return the font type
+     */
+    public int getFontType(){
+        return type;
+    }
+
+    /**
+     * set lfPitchAndFamily
+     *
+     *
+     * @param val - Corresponds to the lfPitchAndFamily field of the Win32 API LOGFONT structure
+     */
+    public void setPitchAndFamily(int val){
+        pitch = val;
+    }
+
+    /**
+     * get lfPitchAndFamily
+     *
+     * @return corresponds to the lfPitchAndFamily field of the Win32 API LOGFONT structure
+     */
+    public int getPitchAndFamily(){
+        return pitch;
+    }
+
+    public static final PPFont ARIAL;
+    public static final PPFont TIMES_NEW_ROMAN ;
+    public static final PPFont COURIER_NEW;
+    public static final PPFont WINGDINGS;
+    static {
+        ARIAL = new PPFont();
+        ARIAL.setFontName("Arial");
+        ARIAL.setCharSet(ANSI_CHARSET);
+        ARIAL.setFontType(4);
+        ARIAL.setFontFlags(0);
+        ARIAL.setPitchAndFamily(VARIABLE_PITCH | FF_SWISS);
+
+        TIMES_NEW_ROMAN = new PPFont();
+        TIMES_NEW_ROMAN.setFontName("Times New Roman");
+        TIMES_NEW_ROMAN.setCharSet(ANSI_CHARSET);
+        TIMES_NEW_ROMAN.setFontType(4);
+        TIMES_NEW_ROMAN.setFontFlags(0);
+        TIMES_NEW_ROMAN.setPitchAndFamily(VARIABLE_PITCH | FF_ROMAN);
+
+        COURIER_NEW = new PPFont();
+        COURIER_NEW.setFontName("Courier New");
+        COURIER_NEW.setCharSet(ANSI_CHARSET);
+        COURIER_NEW.setFontType(4);
+        COURIER_NEW.setFontFlags(0);
+        COURIER_NEW.setPitchAndFamily(FIXED_PITCH | FF_MODERN);
+
+        WINGDINGS = new PPFont();
+        WINGDINGS.setFontName("Wingdings");
+        WINGDINGS.setCharSet(SYMBOL_CHARSET);
+        WINGDINGS.setFontType(4);
+        WINGDINGS.setFontFlags(0);
+        WINGDINGS.setPitchAndFamily(VARIABLE_PITCH | FF_DONTCARE);
+    }
+}

src/scratchpad/src/org/apache/poi/hslf/record/FontCollection.java

@@ -75,16 +75,20 @@ public class FontCollection extends RecordContainer {
      * @return zero based index of the font in the collection
      */
     public int addFont(String name) {
-        for (int i = 0; i < fonts.size(); i++) {
+        int idx = getFontIndex(name);
-            if(fonts.get(i).equals(name)){
+        if(idx != -1) return idx;
-                //if the font is already present return its index
-                return i;
-            }
-        }
 
+        return addFont(name, 0, 0, 4, 34);
+    }
+
+    public int addFont(String name, int charset, int flags, int type, int pitch) {
         FontEntityAtom fnt = new FontEntityAtom();
         fnt.setFontIndex(fonts.size() << 4);
         fnt.setFontName(name);
+        fnt.setCharSet(charset);
+        fnt.setFontFlags(flags);
+        fnt.setFontType(type);
+        fnt.setPitchAndFamily(pitch);
         fonts.add(name);
 
         // Append new child to the end
@@ -93,7 +97,24 @@ public class FontCollection extends RecordContainer {
         return fonts.size()-1; //the added font is the last in the list
     }
 
-	/**
+    /**
+     * @return zero based index of the font in the collection or -1 if not found
+     */
+    public int getFontIndex(String name) {
+        for (int i = 0; i < fonts.size(); i++) {
+            if(fonts.get(i).equals(name)){
+                //if the font is already present return its index
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    public int getNumberOfFonts() {
+        return fonts.size();
+    }
+
+    /**
 	 * Get the name of the font at the given ID, or null if there is
 	 *  no font at that ID.
 	 * @param id

src/scratchpad/src/org/apache/poi/hslf/record/FontEntityAtom.java

@@ -61,7 +61,7 @@ public class FontEntityAtom extends RecordAtom {
     /**
      * Create a new instance of <code>FontEntityAtom</code>
      */
-    protected FontEntityAtom() {
+    public FontEntityAtom() {
         _recdata = new byte[68];
 
         _header = new byte[8];
@@ -124,15 +124,100 @@ public class FontEntityAtom extends RecordAtom {
         }
     }
 
-    protected void setFontIndex(int idx){
+    public void setFontIndex(int idx){
         LittleEndian.putShort(_header, 0, (short)idx);
     }
 
-    protected int getFontIndex(){
+    public int getFontIndex(){
-        return LittleEndian.getShort(_header, 0);
+        return LittleEndian.getShort(_header, 0) >> 4;
     }
 
-	/**
+    /**
+     * set the character set
+     *
+     * @param charset - characterset
+     */
+    public void setCharSet(int charset){
+        _recdata[64] = (byte)charset;
+    }
+
+    /**
+     * get the character set
+     *
+     * @return charset - characterset
+     */
+    public int getCharSet(){
+        return _recdata[64];
+    }
+
+    /**
+     * set the font flags
+     * Bit 1: If set, font is subsetted
+     *
+     * @param flags - the font flags
+     */
+    public void setFontFlags(int flags){
+        _recdata[65] = (byte)flags;
+    }
+
+    /**
+     * get the character set
+     * Bit 1: If set, font is subsetted
+     *
+     * @return the font flags
+     */
+    public int getFontFlags(){
+        return _recdata[65];
+    }
+
+    /**
+     * set the font type
+     * <p>
+     * Bit 1: Raster Font
+     * Bit 2: Device Font
+     * Bit 3: TrueType Font
+     * </p>
+     *
+     * @param type - the font type
+     */
+    public void setFontType(int type){
+        _recdata[66] = (byte)type;
+    }
+
+    /**
+     * get the font type
+     * <p>
+     * Bit 1: Raster Font
+     * Bit 2: Device Font
+     * Bit 3: TrueType Font
+     * </p>
+     *
+     * @return the font type
+     */
+    public int getFontType(){
+        return _recdata[66];
+    }
+
+    /**
+     * set lfPitchAndFamily
+     *
+     *
+     * @param val - Corresponds to the lfPitchAndFamily field of the Win32 API LOGFONT structure
+     */
+    public void setPitchAndFamily(int val){
+        _recdata[67] = (byte)val;
+    }
+
+    /**
+     * get lfPitchAndFamily
+     *
+     * @return corresponds to the lfPitchAndFamily field of the Win32 API LOGFONT structure
+     */
+    public int getPitchAndFamily(){
+        return _recdata[67];
+    }
+
+    /**
 	 * Write the contents of the record back, so it can be written to disk
 	 */
 	public void writeOut(OutputStream out) throws IOException {

src/scratchpad/src/org/apache/poi/hslf/usermodel/SlideShow.java

@@ -757,4 +757,50 @@ public class SlideShow
         }
         return addPicture(data, format);
     }
+
+    /**
+     * Add a font in this presentation
+     *
+     * @param font the font to add
+     * @return 0-based index of the font
+     */
+    public int addFont(PPFont font) {
+        FontCollection fonts = getDocumentRecord().getEnvironment().getFontCollection();
+        int idx = fonts.getFontIndex(font.getFontName());
+        if(idx == -1){
+            idx = fonts.addFont(font.getFontName(), font.getCharSet(), font.getFontFlags(), font.getFontType(), font.getPitchAndFamily());
+        }
+        return idx;
+    }
+
+    /**
+     * Get a font by index
+     *
+     * @param idx 0-based index of the font
+     * @return of an instance of <code>PPFont</code> or <code>null</code> if not found
+     */
+    public PPFont getFont(int idx) {
+        PPFont font = null;
+        FontCollection fonts = getDocumentRecord().getEnvironment().getFontCollection();
+        Record[] ch = fonts.getChildRecords();
+        for (int i = 0; i < ch.length; i++) {
+            if(ch[i] instanceof FontEntityAtom) {
+                FontEntityAtom atom = (FontEntityAtom)ch[i];
+                if(atom.getFontIndex() == idx){
+                    font = new PPFont(atom);
+                    break;
+                }
+            }
+        }
+        return font;
+    }
+
+    /**
+     * get the number of fonts in the presentation
+     *
+     * @return number of fonts
+     */
+    public int getNumberOfFonts() {
+        return getDocumentRecord().getEnvironment().getFontCollection().getNumberOfFonts();
+    }
 }

src/scratchpad/testcases/org/apache/poi/hslf/model/TestPPFont.java

@@ -0,0 +1,56 @@
+
+/* ====================================================================
+   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.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+
+package org.apache.poi.hslf.model;
+
+import junit.framework.TestCase;
+import org.apache.poi.hslf.usermodel.SlideShow;
+
+import java.io.IOException;
+
+/**
+ * Test adding fonts to the presenataion resources
+ * 
+ * @author Yegor Kozlov
+ */
+public class TestPPFont extends TestCase{
+
+    public void testCreate() throws IOException {
+        SlideShow ppt = new SlideShow();
+        assertEquals(1, ppt.getNumberOfFonts());
+        assertEquals("Arial", ppt.getFont(0).getFontName());
+
+        //adding the same font twice
+        assertEquals(0, ppt.addFont(PPFont.ARIAL));
+        assertEquals(1, ppt.getNumberOfFonts());
+
+        assertEquals(1, ppt.addFont(PPFont.TIMES_NEW_ROMAN));
+        assertEquals(2, ppt.addFont(PPFont.COURIER_NEW));
+        assertEquals(3, ppt.addFont(PPFont.WINGDINGS));
+
+        assertEquals(4, ppt.getNumberOfFonts());
+
+        assertEquals(PPFont.TIMES_NEW_ROMAN.getFontName(), ppt.getFont(1).getFontName());
+        assertEquals(PPFont.COURIER_NEW.getFontName(), ppt.getFont(2).getFontName());
+
+        PPFont font3 = ppt.getFont(3);
+        assertEquals(PPFont.WINGDINGS.getFontName(), font3.getFontName());
+        assertEquals(PPFont.SYMBOL_CHARSET, font3.getCharSet());
+        assertEquals(PPFont.VARIABLE_PITCH, font3.getPitchAndFamily());
+    }
+}