sixel support for TTerminalWindow

[fanfix.git] / src / jexer / TTerminalWindow.java

diff --git a/src/jexer/TTerminalWindow.java b/src/jexer/TTerminalWindow.java
index d17a2c4cdd53b3564fbb952276834f35822146b3..9780e29d7d6643ad0c032801c6605d3320b91052 100644 (file)
--- a/src/jexer/TTerminalWindow.java
+++ b/src/jexer/TTerminalWindow.java
@@ -28,10 +28,10 @@
  */
 package jexer;
 
-import java.awt.image.BufferedImage;
 import java.awt.Font;
 import java.awt.FontMetrics;
 import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
 
 import java.io.InputStream;
 import java.io.IOException;
@@ -132,6 +132,18 @@ public class TTerminalWindow extends TScrollableWindow
      */
     private Map<Cell, BufferedImage> glyphCache;
 
+    /**
+     * A cache of previously-rendered double-width glyphs for blinking text,
+     * when it is not visible.
+     */
+    private Map<Cell, BufferedImage> glyphCacheBlink;
+
+    /**
+     * The blink state, used only by ECMA48 backend and when double-width
+     * chars must be drawn.
+     */
+    private boolean blinkState = true;
+
     // ------------------------------------------------------------------------
     // Constructors -----------------------------------------------------------
     // ------------------------------------------------------------------------
@@ -538,13 +550,17 @@ public class TTerminalWindow extends TScrollableWindow
             return;
         }
 
-        if (mouse.isMouseWheelUp()) {
-            verticalDecrement();
-            return;
-        }
-        if (mouse.isMouseWheelDown()) {
-            verticalIncrement();
-            return;
+        // If the emulator is tracking mouse buttons, it needs to see wheel
+        // events.
+        if (emulator.getMouseProtocol() == ECMA48.MouseProtocol.OFF) {
+            if (mouse.isMouseWheelUp()) {
+                verticalDecrement();
+                return;
+            }
+            if (mouse.isMouseWheelDown()) {
+                verticalIncrement();
+                return;
+            }
         }
         if (mouseOnEmulator(mouse)) {
             synchronized (emulator) {
@@ -749,6 +765,22 @@ public class TTerminalWindow extends TScrollableWindow
 
         // Add shortcut text
         newStatusBar(i18n.getString("statusBarRunning"));
+
+        // Pass the correct text cell width/height to the emulator
+        int textWidth = 16;
+        int textHeight = 20;
+        if (getScreen() instanceof SwingTerminal) {
+            SwingTerminal terminal = (SwingTerminal) getScreen();
+
+            textWidth = terminal.getTextWidth();
+            textHeight = terminal.getTextHeight();
+        } else if (getScreen() instanceof ECMA48Terminal) {
+            ECMA48Terminal terminal = (ECMA48Terminal) getScreen();
+            textWidth = terminal.getTextWidth();
+            textHeight = terminal.getTextHeight();
+        }
+        emulator.setTextWidth(textWidth);
+        emulator.setTextHeight(textHeight);
     }
 
     /**
@@ -931,17 +963,28 @@ public class TTerminalWindow extends TScrollableWindow
 
         int textWidth = 16;
         int textHeight = 20;
+        boolean cursorBlinkVisible = true;
 
         if (getScreen() instanceof SwingTerminal) {
             SwingTerminal terminal = (SwingTerminal) getScreen();
 
             textWidth = terminal.getTextWidth();
             textHeight = terminal.getTextHeight();
+            cursorBlinkVisible = terminal.getCursorBlinkVisible();
         } else if (getScreen() instanceof ECMA48Terminal) {
             ECMA48Terminal terminal = (ECMA48Terminal) getScreen();
 
+            if (!terminal.hasSixel()) {
+                // The backend does not have sixel support, draw this as text
+                // and bail out.
+                putCharXY(x, y, cell);
+                putCharXY(x + 1, y, ' ', cell);
+                return;
+            }
+
             textWidth = terminal.getTextWidth();
             textHeight = terminal.getTextHeight();
+            cursorBlinkVisible = blinkState;
         } else {
             // We don't know how to dray glyphs to this screen, draw them as
             // text and bail out.
@@ -959,8 +1002,11 @@ public class TTerminalWindow extends TScrollableWindow
         assert (doubleFont != null);
 
         BufferedImage image = null;
-
-        image = glyphCache.get(cell);
+        if (cell.isBlink() && !cursorBlinkVisible) {
+            image = glyphCacheBlink.get(cell);
+        } else {
+            image = glyphCache.get(cell);
+        }
         if (image == null) {
             // Generate glyph and draw it to an image.
             image = new BufferedImage(textWidth * 2, textHeight * 2,
@@ -976,14 +1022,18 @@ public class TTerminalWindow extends TScrollableWindow
                 gr2.setColor(SwingTerminal.attrToBackgroundColor(cell));
                 gr2.fillRect(0, 0, image.getWidth(), image.getHeight());
             }
-            gr2.setColor(SwingTerminal.attrToForegroundColor(cell));
-            char [] chars = new char[1];
-            chars[0] = cell.getChar();
-            gr2.drawChars(chars, 0, 1, doubleTextAdjustX,
-                (textHeight * 2) - doubleMaxDescent + doubleTextAdjustY);
-
-            if (cell.isUnderline() && (line.getDoubleHeight() != 1)) {
-                gr2.fillRect(0, textHeight - 2, textWidth, 2);
+            if (!cell.isBlink()
+                || (cell.isBlink() && cursorBlinkVisible)
+            ) {
+                gr2.setColor(SwingTerminal.attrToForegroundColor(cell));
+                char [] chars = new char[1];
+                chars[0] = cell.getChar();
+                gr2.drawChars(chars, 0, 1, doubleTextAdjustX,
+                    (textHeight * 2) - doubleMaxDescent + doubleTextAdjustY);
+
+                if (cell.isUnderline() && (line.getDoubleHeight() != 1)) {
+                    gr2.fillRect(0, textHeight - 2, textWidth, 2);
+                }
             }
             gr2.dispose();
 
@@ -991,7 +1041,11 @@ public class TTerminalWindow extends TScrollableWindow
             // be mutated by invertCell().
             Cell key = new Cell();
             key.setTo(cell);
-            glyphCache.put(key, image);
+            if (cell.isBlink() && !cursorBlinkVisible) {
+                glyphCacheBlink.put(key, image);
+            } else {
+                glyphCache.put(key, image);
+            }
         }
 
         // Now that we have the double-wide glyph drawn, copy the right
@@ -1066,8 +1120,25 @@ public class TTerminalWindow extends TScrollableWindow
 
         gr.dispose();
 
-        // (Re)create the glyph cache.
+        // (Re)create the glyph caches.
         glyphCache = new HashMap<Cell, BufferedImage>();
+        glyphCacheBlink = new HashMap<Cell, BufferedImage>();
+
+        // Special case: the ECMA48 backend needs to have a timer to drive
+        // its blink state.
+        if (getScreen() instanceof jexer.backend.ECMA48Terminal) {
+            // Blink every 500 millis.
+            long millis = 500;
+            getApplication().addTimer(millis, true,
+                new TAction() {
+                    public void DO() {
+                        blinkState = !blinkState;
+                        getApplication().doRepaint();
+                    }
+                }
+            );
+        }
+
     }
 
 }