Support clicking directly on a URL to open it

This allows you to click/press directly on a URL in the terminal view to
open it. It takes priority over opening the keyboard, so if you click on
a URL it is opened, and if you click anywhere else the keyboard opens
like before.

Currently, if the application in the terminal is tracking the mouse and
you click on a URL, both actions happen. The mouse event is sent to the
application, and the URL is also opened.

To enable support for this, you have to set
`terminal-onclick-url-open = true` in `termux.properties`.

app/src/main/java/com/termux/app/terminal/TermuxTerminalViewClient.java

@@ -42,6 +42,7 @@
 import com.termux.shared.view.KeyboardUtils;
 import com.termux.shared.view.ViewUtils;
 import com.termux.terminal.KeyHandler;
+import com.termux.terminal.TerminalBuffer;
 import com.termux.terminal.TerminalEmulator;
 import com.termux.terminal.TerminalSession;
 
@@ -172,10 +173,26 @@ public float onScale(float scale) {
 
     @Override
     public void onSingleTapUp(MotionEvent e) {
-        if (!KeyboardUtils.areDisableSoftKeyboardFlagsSet(mActivity))
-            KeyboardUtils.showSoftKeyboard(mActivity, mActivity.getTerminalView());
-        else
-            Logger.logVerbose(LOG_TAG, "Not showing soft keyboard onSingleTapUp since its disabled");
+        TerminalEmulator term = mActivity.getCurrentSession().getEmulator();
+
+        if (mActivity.getProperties().shouldOpenTerminalTranscriptURLOnClick()) {
+            int[] xAndY = mActivity.getTerminalView().getTextSelectionCursorController().getXAndYFromEvent(e);
+            String wordAtTap = term.getScreen().getWordAtLocation(xAndY[0], xAndY[1]);
+            LinkedHashSet<CharSequence> urlSet = UrlUtils.extractUrls(wordAtTap);
+
+            if (!urlSet.isEmpty()) {
+                String url = (String) urlSet.iterator().next();
+                openUrl(url);
+                return;
+            }
+        }
+
+        if (!term.isMouseTrackingActive() && !e.isFromSource(InputDevice.SOURCE_MOUSE)) {
+            if (!KeyboardUtils.areDisableSoftKeyboardFlagsSet(mActivity))
+                KeyboardUtils.showSoftKeyboard(mActivity, mActivity.getTerminalView());
+            else
+                Logger.logVerbose(LOG_TAG, "Not showing soft keyboard onSingleTapUp since its disabled");
+        }
     }
 
     @Override
@@ -670,20 +687,24 @@ public void showUrlSelection() {
             lv.setOnItemLongClickListener((parent, view, position, id) -> {
                 dialog.dismiss();
                 String url = (String) urls[position];
-                Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
-                try {
-                    mActivity.startActivity(i, null);
-                } catch (ActivityNotFoundException e) {
-                    // If no applications match, Android displays a system message.
-                    mActivity.startActivity(Intent.createChooser(i, null));
-                }
+                openUrl(url);
                 return true;
             });
         });
 
         dialog.show();
     }
 
+    public void openUrl(String url) {
+        Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
+        try {
+            mActivity.startActivity(i, null);
+        } catch (ActivityNotFoundException e) {
+            // If no applications match, Android displays a system message.
+            mActivity.startActivity(Intent.createChooser(i, null));
+        }
+    }
+
     public void reportIssueFromTranscript() {
         TerminalSession session = mActivity.getCurrentSession();
         if (session == null) return;

terminal-emulator/src/main/java/com/termux/terminal/TerminalBuffer.java

@@ -102,6 +102,45 @@ public String getSelectedText(int selX1, int selY1, int selX2, int selY2, boolea
         return builder.toString();
     }
 
+    public String getWordAtLocation(int x, int y) {
+        // Set y1 and y2 to the lines where the wrapped line starts and ends.
+        // I.e. if a line that is wrapped to 3 lines starts at line 4, and this
+        // is called with y=5, then y1 would be set to 4 and y2 would be set to 6.
+        int y1 = y;
+        int y2 = y;
+        while (y1 > 0 && !getSelectedText(0, y1 - 1, mColumns, y, true, true).contains("\n")) {
+            y1--;
+        }
+        while (y2 < mScreenRows && !getSelectedText(0, y, mColumns, y2 + 1, true, true).contains("\n")) {
+            y2++;
+        }
+
+        // Get the text for the whole wrapped line
+        String text = getSelectedText(0, y1, mColumns, y2, true, true);
+        // The index of x in text
+        int textOffset = (y - y1) * mColumns + x;
+
+        if (textOffset >= text.length()) {
+          // The click was to the right of the last word on the line, so
+          // there's no word to return
+          return "";
+        }
+
+        // Set x1 and x2 to the indices of the last space before x and the
+        // first space after x in text respectively
+        int x1 = text.lastIndexOf(' ', textOffset);
+        int x2 = text.indexOf(' ', textOffset);
+        if (x2 == -1) {
+            x2 = text.length();
+        }
+
+        if (x1 == x2) {
+          // The click was on a space, so there's no word to return
+          return "";
+        }
+        return text.substring(x1 + 1, x2);
+    }
+
     public int getActiveTranscriptRows() {
         return mActiveTranscriptRows;
     }

terminal-emulator/src/test/java/com/termux/terminal/ScreenBufferTest.java

@@ -45,4 +45,21 @@ public void testGetSelectedTextJoinFullLines() {
 		withTerminalSized(5, 3).enterString("ABC\r\nFG");
 		assertEquals("ABC\nFG", mTerminal.getScreen().getSelectedText(0, 0, 1, 1, true, true));
 	}
+
+	public void testGetWordAtLocation() {
+		withTerminalSized(5, 3).enterString("ABCDEFGHIJ\r\nKLMNO");
+		assertEquals("ABCDEFGHIJKLMNO", mTerminal.getScreen().getWordAtLocation(0, 0));
+		assertEquals("ABCDEFGHIJKLMNO", mTerminal.getScreen().getWordAtLocation(4, 1));
+		assertEquals("ABCDEFGHIJKLMNO", mTerminal.getScreen().getWordAtLocation(4, 2));
+
+		withTerminalSized(5, 3).enterString("ABC DEF GHI ");
+		assertEquals("ABC", mTerminal.getScreen().getWordAtLocation(0, 0));
+		assertEquals("", mTerminal.getScreen().getWordAtLocation(3, 0));
+		assertEquals("DEF", mTerminal.getScreen().getWordAtLocation(4, 0));
+		assertEquals("DEF", mTerminal.getScreen().getWordAtLocation(0, 1));
+		assertEquals("DEF", mTerminal.getScreen().getWordAtLocation(1, 1));
+		assertEquals("GHI", mTerminal.getScreen().getWordAtLocation(0, 2));
+		assertEquals("", mTerminal.getScreen().getWordAtLocation(1, 2));
+		assertEquals("", mTerminal.getScreen().getWordAtLocation(2, 2));
+	}
 }

terminal-view/src/main/java/com/termux/view/TerminalView.java

@@ -94,7 +94,7 @@ public TerminalView(Context context, AttributeSet attributes) { // NO_UCD (unuse
             @Override
             public boolean onUp(MotionEvent event) {
                 mScrollRemainder = 0.0f;
-                if (mEmulator != null && mEmulator.isMouseTrackingActive() && !isSelectingText() && !scrolledWithFinger) {
+                if (mEmulator != null && mEmulator.isMouseTrackingActive() && !event.isFromSource(InputDevice.SOURCE_MOUSE) && !isSelectingText() && !scrolledWithFinger) {
                     // Quick event processing when mouse tracking is active - do not wait for check of double tapping
                     // for zooming.
                     sendMouseEventCode(event, TerminalEmulator.MOUSE_LEFT_BUTTON, true);
@@ -114,13 +114,8 @@ public boolean onSingleTapUp(MotionEvent event) {
                     return true;
                 }
                 requestFocus();
-                if (!mEmulator.isMouseTrackingActive()) {
-                    if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) {
-                        mClient.onSingleTapUp(event);
-                        return true;
-                    }
-                }
-                return false;
+                mClient.onSingleTapUp(event);
+                return true;
             }
 
             @Override
@@ -550,7 +545,6 @@ public boolean onTouchEvent(MotionEvent event) {
                         sendMouseEventCode(event, TerminalEmulator.MOUSE_LEFT_BUTTON_MOVED, true);
                         break;
                 }
-                return true;
             }
         }
 
@@ -1135,7 +1129,7 @@ public void run() {
     /**
      * Define functions required for text selection and its handles.
      */
-    TextSelectionCursorController getTextSelectionCursorController() {
+    public TextSelectionCursorController getTextSelectionCursorController() {
         if (mTextSelectionCursorController == null) {
             mTextSelectionCursorController = new TextSelectionCursorController(this);
 

terminal-view/src/main/java/com/termux/view/textselection/TextSelectionCursorController.java

@@ -88,15 +88,19 @@ public void render() {
         }
     }
 
-    public void setInitialTextSelectionPosition(MotionEvent event) {
+    public int[] getXAndYFromEvent(MotionEvent event) {
         int cx = (int) (event.getX() / terminalView.mRenderer.getFontWidth());
         final boolean eventFromMouse = event.isFromSource(InputDevice.SOURCE_MOUSE);
         // Offset for finger:
         final int SELECT_TEXT_OFFSET_Y = eventFromMouse ? 0 : -40;
         int cy = (int) ((event.getY() + SELECT_TEXT_OFFSET_Y) / terminalView.mRenderer.getFontLineSpacing()) + terminalView.getTopRow();
+        return new int[] { cx, cy };
+    }
 
-        mSelX1 = mSelX2 = cx;
-        mSelY1 = mSelY2 = cy;
+    public void setInitialTextSelectionPosition(MotionEvent event) {
+        int[] xAndY = getXAndYFromEvent(event);
+        mSelX1 = mSelX2 = xAndY[0];
+        mSelY1 = mSelY2 = xAndY[1];
 
         TerminalBuffer screen = terminalView.mEmulator.getScreen();
         if (!" ".equals(screen.getSelectedText(mSelX1, mSelY1, mSelX1, mSelY1))) {