add copy/paste clipboard event

backends/backend-teavm/src/main/java/com/github/xpenatan/gdx/backends/teavm/TeaClipboard.java

@@ -1,64 +1,100 @@
 package com.github.xpenatan.gdx.backends.teavm;
 
 import com.badlogic.gdx.utils.Clipboard;
+import com.github.xpenatan.gdx.backends.teavm.dom.ClipboardEventWrapper;
+import com.github.xpenatan.gdx.backends.teavm.dom.DataTransferWrapper;
+import com.github.xpenatan.gdx.backends.teavm.dom.impl.TeaWindow;
 import org.teavm.jso.JSBody;
 
 /**
  * Clipboard implementation copied over from libGDX/GWT. Paste only works within the libGDX application.
  */
 public class TeaClipboard implements Clipboard {
 
-  private boolean requestedWritePermissions = false;
-  private boolean hasWritePermissions = true;
+    private boolean requestedWritePermissions = false;
+    private boolean hasWritePermissions = true;
 
-  private final ClipboardWriteHandler writeHandler = new ClipboardWriteHandler();
+    private final ClipboardWriteHandler writeHandler = new ClipboardWriteHandler();
 
-  private String content = "";
+    private String content = "";
 
-  @Override
-  public boolean hasContents () {
-    String contents = getContents();
-    return contents != null && !contents.isEmpty();
-  }
+    public TeaClipboard() {
 
-  @Override
-  public String getContents () {
-    return content;
-  }
+    TeaWindow.get().getDocument().addEventListener("copy", evt -> {
+        ClipboardEventWrapper event = (ClipboardEventWrapper)evt;
+        DataTransferWrapper clipboardData = event.getClipboardData();
+        if(clipboardData != null) {
+//            System.out.println("COPY DATA: " + content);
+            clipboardData.setData("text/plain", content);
+        }
+        evt.preventDefault();
+    });
 
-  @Override
-  public void setContents (String content) {
-    this.content = content;
-    if (requestedWritePermissions || TeaApplication.getAgentInfo().isFirefox()) {
-      if (hasWritePermissions) setContentNATIVE(content);
-    } else {
-      TeaPermissions.queryPermission("clipboard-write", writeHandler);
-      requestedWritePermissions = true;
-    }
-  }
+    TeaWindow.get().getDocument().addEventListener("cut", evt -> {
+        ClipboardEventWrapper event = (ClipboardEventWrapper)evt;
+        DataTransferWrapper clipboardData = event.getClipboardData();
+        if(clipboardData != null) {
+//            System.out.println("CUT DATA: " + content);
+            clipboardData.setData("text/plain", content);
+        }
+        evt.preventDefault();
+    });
 
-  @JSBody(params = {"content"}, script =
-          "if (\"clipboard\" in navigator) {\n" +
-          "    navigator.clipboard.writeText(content);\n" +
-          "}")
-  private static native void setContentNATIVE(String content);
+        TeaWindow.get().getDocument().addEventListener("paste", evt -> {
+            ClipboardEventWrapper event = (ClipboardEventWrapper)evt;
+            DataTransferWrapper clipboardData = event.getClipboardData();
+            if(clipboardData != null) {
+                content = clipboardData.getData("text/plain");
+//                System.out.println("PASTE DATA: " + content);
+            }
+            evt.preventDefault();
+        });
+    }
 
-  private class ClipboardWriteHandler implements TeaPermissions.TeaPermissionResult {
     @Override
-    public void granted () {
-      hasWritePermissions = true;
-      setContentNATIVE(content);
+    public boolean hasContents() {
+        String contents = getContents();
+        return contents != null && !contents.isEmpty();
     }
 
     @Override
-    public void denied () {
-      hasWritePermissions = false;
+    public String getContents () {
+        return content;
     }
 
     @Override
-    public void prompt () {
-      hasWritePermissions = true;
-      setContentNATIVE(content);
+    public void setContents (String content) {
+        this.content = content;
+        if (requestedWritePermissions || TeaApplication.getAgentInfo().isFirefox()) {
+          if (hasWritePermissions) setContentNATIVE(content);
+        } else {
+          TeaPermissions.queryPermission("clipboard-write", writeHandler);
+          requestedWritePermissions = true;
+        }
+    }
+
+    @JSBody(params = {"content"}, script =
+          "if (\"clipboard\" in navigator) {\n" +
+          "    navigator.clipboard.writeText(content);\n" +
+          "}")
+    private static native void setContentNATIVE(String content);
+
+    private class ClipboardWriteHandler implements TeaPermissions.TeaPermissionResult {
+        @Override
+        public void granted() {
+            hasWritePermissions = true;
+            setContentNATIVE(content);
+        }
+
+        @Override
+        public void denied() {
+            hasWritePermissions = false;
+        }
+
+        @Override
+        public void prompt() {
+            hasWritePermissions = true;
+            setContentNATIVE(content);
+        }
     }
-  }
 }

backends/backend-teavm/src/main/java/com/github/xpenatan/gdx/backends/teavm/dom/ClipboardEventWrapper.java

@@ -0,0 +1,12 @@
+package com.github.xpenatan.gdx.backends.teavm.dom;
+
+import org.teavm.jso.JSProperty;
+
+/**
+ * @author xpenatan
+ */
+public interface ClipboardEventWrapper extends EventWrapper {
+
+    @JSProperty
+    DataTransferWrapper getClipboardData();
+}

backends/backend-teavm/src/main/java/com/github/xpenatan/gdx/backends/teavm/dom/DataTransferWrapper.java

@@ -1,5 +1,6 @@
 package com.github.xpenatan.gdx.backends.teavm.dom;
 
+import org.teavm.jso.JSMethod;
 import org.teavm.jso.JSObject;
 import org.teavm.jso.JSProperty;
 
@@ -10,4 +11,10 @@ public interface DataTransferWrapper extends JSObject {
 
     @JSProperty
     FileListWrapper getFiles();
+
+    @JSMethod
+    String getData(String format);
+
+    @JSMethod
+    void setData(String format, String data);
 }