X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fjexer%2Fbackend%2FGlyphMaker.java;h=e5fcc522da927fb2c8788b98f8a5075815389f38;hb=c4cefaa04ec122fc02efb6542451a31fdf722c32;hp=2a6610bbec4c8cedff479a6962b8502757bac874;hpb=218d18dbda14a7bf482d6c07bed66f16bcd6a6ba;p=nikiroo-utils.git

diff --git a/src/jexer/backend/GlyphMaker.java b/src/jexer/backend/GlyphMaker.java
index 2a6610b..e5fcc52 100644
--- a/src/jexer/backend/GlyphMaker.java
+++ b/src/jexer/backend/GlyphMaker.java
@@ -29,6 +29,7 @@
 package jexer.backend;
 
 import java.awt.Font;
+import java.awt.FontFormatException;
 import java.awt.FontMetrics;
 import java.awt.Graphics2D;
 import java.awt.geom.Rectangle2D;
@@ -38,6 +39,7 @@ import java.io.IOException;
 import java.util.HashMap;
 
 import jexer.bits.Cell;
+import jexer.bits.StringUtils;
 
 /**
  * GlyphMakerFont creates glyphs as bitmaps from a font.
@@ -135,18 +137,28 @@ class GlyphMakerFont {
      * @param fontSize the size of font to use
      */
     public GlyphMakerFont(final String filename, final int fontSize) {
+
+        if (filename.length() == 0) {
+            // Fallback font
+            font = new Font(Font.MONOSPACED, Font.PLAIN, fontSize - 2);
+            return;
+        }
+
         Font fontRoot = null;
         try {
             ClassLoader loader = Thread.currentThread().getContextClassLoader();
             InputStream in = loader.getResourceAsStream(filename);
             fontRoot = Font.createFont(Font.TRUETYPE_FONT, in);
-            font = fontRoot.deriveFont(Font.PLAIN, fontSize);
-        } catch (java.awt.FontFormatException e) {
-            e.printStackTrace();
-            font = new Font(Font.MONOSPACED, Font.PLAIN, fontSize);
-        } catch (java.io.IOException e) {
-            e.printStackTrace();
-            font = new Font(Font.MONOSPACED, Font.PLAIN, fontSize);
+            font = fontRoot.deriveFont(Font.PLAIN, fontSize - 2);
+        } catch (FontFormatException e) {
+            // Ideally we would report an error here, either via System.err
+            // or TExceptionDialog.  However, I do not want GlyphMaker to
+            // know about available backends, so we quietly fallback to
+            // whatever is available as MONO.
+            font = new Font(Font.MONOSPACED, Font.PLAIN, fontSize - 2);
+        } catch (IOException e) {
+            // See comment above.
+            font = new Font(Font.MONOSPACED, Font.PLAIN, fontSize - 2);
         }
     }
 
@@ -285,6 +297,17 @@ class GlyphMakerFont {
         gotFontDimensions = true;
     }
 
+    /**
+     * Checks if this maker's Font has a glyph for the specified character.
+     *
+     * @param codePoint the character (Unicode code point) for which a glyph
+     * is needed.
+     * @return true if this Font has a glyph for the character; false
+     * otherwise.
+     */
+    public boolean canDisplay(final int codePoint) {
+        return font.canDisplay(codePoint);
+    }
 }
 
 /**
@@ -312,6 +335,11 @@ public class GlyphMaker {
      */
     private static final String emojiFontFilename = "OpenSansEmoji.ttf";
 
+    /**
+     * The fallback font resource filename.
+     */
+    private static final String fallbackFontFilename = "";
+
     // ------------------------------------------------------------------------
     // Variables --------------------------------------------------------------
     // ------------------------------------------------------------------------
@@ -341,6 +369,11 @@ public class GlyphMaker {
      */
     private GlyphMakerFont makerEmoji;
 
+    /**
+     * The instance that has the fallback font.
+     */
+    private GlyphMakerFont makerFallback;
+
     // ------------------------------------------------------------------------
     // Constructors -----------------------------------------------------------
     // ------------------------------------------------------------------------
@@ -360,6 +393,9 @@ public class GlyphMaker {
         fontFilename = System.getProperty("jexer.emojiFont.filename",
             emojiFontFilename);
         makerEmoji = new GlyphMakerFont(fontFilename, fontSize);
+        fontFilename = System.getProperty("jexer.fallbackFont.filename",
+            fallbackFontFilename);
+        makerFallback = new GlyphMakerFont(fontFilename, fontSize);
     }
 
     // ------------------------------------------------------------------------
@@ -410,15 +446,28 @@ public class GlyphMaker {
         final int cellHeight, final boolean blinkVisible) {
 
         int ch = cell.getChar();
-        if ((ch >= 0x2e80) && (ch <= 0x9fff)) {
-            return makerCjk.getImage(cell, cellWidth, cellHeight, blinkVisible);
+        if (StringUtils.isCjk(ch)) {
+            if (makerCjk.canDisplay(ch)) {
+                return makerCjk.getImage(cell, cellWidth, cellHeight,
+                    blinkVisible);
+            }
         }
-        if ((ch >= 0x1f004) && (ch <= 0x1f9c0)) {
-            return makerEmoji.getImage(cell, cellWidth, cellHeight, blinkVisible);
+        if (StringUtils.isEmoji(ch)) {
+            if (makerEmoji.canDisplay(ch)) {
+                // System.err.println("emoji: " + String.format("0x%x", ch));
+                return makerEmoji.getImage(cell, cellWidth, cellHeight,
+                    blinkVisible);
+            }
         }
 
         // When all else fails, use the default.
-        return makerMono.getImage(cell, cellWidth, cellHeight, blinkVisible);
+        if (makerMono.canDisplay(ch)) {
+            return makerMono.getImage(cell, cellWidth, cellHeight,
+                blinkVisible);
+        }
+
+        return makerFallback.getImage(cell, cellWidth, cellHeight,
+            blinkVisible);
     }
 
 }