Android: support entry of text into forms

3 files changed, 106 insertions, 7 deletions

diff --git a/android/src/com/artifex/mupdf/MuPDFCore.java b/android/src/com/artifex/mupdf/MuPDFCore.java
index e7653f9e..f2017f77 100644
--- a/android/src/com/artifex/mupdf/MuPDFCore.java
+++ b/android/src/com/artifex/mupdf/MuPDFCore.java
@@ -31,6 +31,9 @@ public class MuPDFCore
 	private static native RectF[] searchPage(String text);
 	private static native int getPageLink(int page, float x, float y);
 	private static native int passClickEventInternal(int page, float x, float y);
+	private static native int setFocusedWidgetTextInternal(String text);
+	private static native String getFocusedWidgetTextInternal();
+	private static native int getFocusedWidgetTypeInternal();
 	private static native LinkInfo [] getPageLinksInternal(int page);
 	private static native RectF[] getWidgetAreasInternal(int page);
 	private static native OutlineItem [] getOutlineInternal();
@@ -95,8 +98,21 @@ public class MuPDFCore
 		return bm;
 	}
 
-	public synchronized boolean passClickEvent(int page, float x, float y) {
+	public synchronized PassClickResult passClickEvent(int page, float x, float y) {
 		boolean changed = passClickEventInternal(page, x, y) != 0;
+		int type = getFocusedWidgetTypeInternal();
+		WidgetType wtype = WidgetType.values()[type];
+		String text;
+
+		switch (wtype)
+		{
+		case TEXT:
+			text = getFocusedWidgetTextInternal();
+			break;
+		default:
+			text = "";
+			break;
+		}
 
 		if (changed) {
 			if (page == pageNum)
@@ -105,7 +121,20 @@ public class MuPDFCore
 			markDirtyInternal(page);
 		}
 
-		return changed;
+		return new PassClickResult(changed, wtype, text);
+	}
+
+	public synchronized boolean setFocusedWidgetText(int page, String text) {
+		boolean success;
+		gotoPage(page);
+		success = setFocusedWidgetTextInternal(text) != 0 ? true : false;
+
+		if (success) {
+			pageNum = -1;
+			markDirtyInternal(page);
+		}
+
+		return success;
 	}
 
 	public synchronized int hitLinkPage(int page, float x, float y) {
diff --git a/android/src/com/artifex/mupdf/MuPDFPageView.java b/android/src/com/artifex/mupdf/MuPDFPageView.java
index 9cb430ef..a2063f59 100644
--- a/android/src/com/artifex/mupdf/MuPDFPageView.java
+++ b/android/src/com/artifex/mupdf/MuPDFPageView.java
@@ -1,20 +1,70 @@
 package com.artifex.mupdf;
 
+import android.app.AlertDialog;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.graphics.Bitmap;
 import android.graphics.Point;
 import android.graphics.PointF;
 import android.graphics.RectF;
+import android.view.LayoutInflater;
+import android.view.WindowManager;
+import android.widget.EditText;
+
+class PassClickResult {
+	public final boolean changed;
+	public final WidgetType type;
+	public final String text;
+
+	public PassClickResult(boolean _changed, WidgetType _type, String _text) {
+		changed = _changed;
+		type = _type;
+		text = _text;
+	}
+}
 
 public class MuPDFPageView extends PageView {
 	private final MuPDFCore mCore;
-	private SafeAsyncTask<Void,Void,Boolean> mPassClick;
+	private SafeAsyncTask<Void,Void,PassClickResult> mPassClick;
 	private RectF mWidgetAreas[];
 	private SafeAsyncTask<Void,Void,RectF[]> mLoadWidgetAreas;
+	private AlertDialog.Builder mTextEntryBuilder;
+	private AlertDialog mTextEntry;
+	private EditText mEditText;
+	private SafeAsyncTask<String,Void,Boolean> mSetWidgetText;
 
 	public MuPDFPageView(Context c, MuPDFCore core, Point parentSize) {
 		super(c, parentSize);
 		mCore = core;
+		mTextEntryBuilder = new AlertDialog.Builder(c);
+		mTextEntryBuilder.setTitle("MuPDF: fill out text field");
+		LayoutInflater inflater = (LayoutInflater)c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+		mEditText = (EditText)inflater.inflate(R.layout.textentry, null);
+		mTextEntryBuilder.setView(mEditText);
+		mTextEntryBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
+			public void onClick(DialogInterface dialog, int which) {
+				dialog.dismiss();
+			}
+		});
+		mTextEntryBuilder.setPositiveButton("Okay", new DialogInterface.OnClickListener() {
+			public void onClick(DialogInterface dialog, int which) {
+				mSetWidgetText = new SafeAsyncTask<String,Void,Boolean> () {
+					@Override
+					protected Boolean doInBackground(String... arg0) {
+						return mCore.setFocusedWidgetText(mPageNumber, arg0[0]);
+					}
+					@Override
+					protected void onPostExecute(Boolean result) {
+						update();
+						if (!result)
+							invokeTextDialog(mEditText.getText().toString());
+					}
+				};
+
+				mSetWidgetText.execute(mEditText.getText().toString());
+			}
+		});
+		mTextEntry = mTextEntryBuilder.create();
 	}
 
 	public int hitLinkPage(float x, float y) {
@@ -29,6 +79,12 @@ public class MuPDFPageView extends PageView {
 		return mCore.hitLinkPage(mPageNumber, docRelX, docRelY);
 	}
 
+	private void invokeTextDialog(String text) {
+		mEditText.setText(text);
+		mTextEntry.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
+		mTextEntry.show();
+	}
+
 	public boolean passClickEvent(float x, float y) {
 		float scale = mSourceScale*(float)getWidth()/(float)mSize.x;
 		final float docRelX = (x - getLeft())/scale;
@@ -42,17 +98,23 @@ public class MuPDFPageView extends PageView {
 		}
 
 		if (hitWidget) {
-			mPassClick = new SafeAsyncTask<Void,Void,Boolean>() {
+			mPassClick = new SafeAsyncTask<Void,Void,PassClickResult>() {
 				@Override
-				protected Boolean doInBackground(Void... arg0) {
+				protected PassClickResult doInBackground(Void... arg0) {
 					return mCore.passClickEvent(mPageNumber, docRelX, docRelY);
 				}
 
 				@Override
-				protected void onPostExecute(Boolean result) {
-					if (result) {
+				protected void onPostExecute(PassClickResult result) {
+					if (result.changed) {
 						update();
 					}
+
+					switch(result.type) {
+					case TEXT:
+						invokeTextDialog(result.text);
+						break;
+					}
 				}
 			};
 
diff --git a/android/src/com/artifex/mupdf/WidgetType.java b/android/src/com/artifex/mupdf/WidgetType.java
new file mode 100644
index 00000000..170232f4
--- /dev/null
+++ b/android/src/com/artifex/mupdf/WidgetType.java
@@ -0,0 +1,8 @@
+package com.artifex.mupdf;
+
+public enum WidgetType {
+	NONE,
+	TEXT,
+	LISTBOX,
+	COMBOBOX
+}