Connect touch scrolling to tmux history

app/src/main/java/com/neatstudio/tmuxandroid/MainActivity.java

@@ -29,6 +29,7 @@ import android.text.method.LinkMovementMethod;
 import android.view.Gravity;
 import android.view.HapticFeedbackConstants;
 import android.view.KeyEvent;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowInsets;
@@ -166,6 +167,8 @@ public final class MainActivity extends Activity {
     private int terminalViewMode = TERMINAL_VIEW_CHAT;
     private int terminalKeyPage;
     private int terminalHistoryOffset;
+    private float terminalTouchStartY;
+    private int terminalTouchStartScrollY;
     private int terminalReconnectAttempt;
     private int terminalConnectionGeneration;
     private int eventReconnectAttempt;
@@ -1734,17 +1737,19 @@ public final class MainActivity extends Activity {
         terminalText.setLineSpacing(0, 1.05f);
         terminalText.setGravity(Gravity.BOTTOM | Gravity.START);
         terminalText.setTextIsSelectable(terminalSelectionEnabled);
-        terminalText.setPadding(dp(2), dp(8), dp(2), dp(8));
+        terminalText.setPadding(dp(2), dp(8), dp(2), 0);
         terminalText.setBackgroundColor(COLOR_TERMINAL_BG);
         terminalChatList = new LinearLayout(this);
         terminalChatList.setOrientation(LinearLayout.VERTICAL);
-        terminalChatList.setPadding(dp(10), dp(12), dp(10), dp(18));
+        terminalChatList.setPadding(0, dp(12), 0, 0);
         terminalChatList.addView(projectStateText("Loading conversation..."), matchWrap());
         showTerminalView(terminalViewMode, false);
         terminalScroll.addOnLayoutChangeListener((view, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom) ->
                 resizeTerminalToViewport(false));
         terminalScroll.setOnScrollChangeListener((view, scrollX, scrollY, oldScrollX, oldScrollY) ->
                 terminalFollowOutput = !view.canScrollVertically(1));
+        terminalScroll.setOverScrollMode(View.OVER_SCROLL_ALWAYS);
+        terminalScroll.setOnTouchListener(this::handleTerminalScrollTouch);
         root.addView(terminalScroll, new LinearLayout.LayoutParams(
                 ViewGroup.LayoutParams.MATCH_PARENT,
                 0,
@@ -1766,6 +1771,8 @@ public final class MainActivity extends Activity {
         });
         inputField.post(() -> {
             inputField.requestFocus();
+            inputField.setSelection(inputField.length());
+            inputField.setCursorVisible(true);
             hideKeyboard();
         });
     }
@@ -2055,7 +2062,7 @@ public final class MainActivity extends Activity {
         boolean user = "user".equals(message.role);
         LinearLayout block = new LinearLayout(this);
         block.setOrientation(LinearLayout.VERTICAL);
-        block.setPadding(dp(2), dp(5), dp(2), dp(7));
+        block.setPadding(dp(10), dp(5), dp(10), dp(7));
 
         TextView content = conversationContent(message, false);
         content.setText((user ? "› " : "• ") + defaultValue(message.content, "(empty)"));
@@ -2098,7 +2105,7 @@ public final class MainActivity extends Activity {
         summary.setTextColor(COLOR_ACCENT_WARM);
         summary.setTextSize(10);
         summary.setTypeface(Typeface.MONOSPACE, Typeface.BOLD);
-        summary.setPadding(dp(2), dp(6), dp(2), dp(6));
+        summary.setPadding(dp(10), dp(6), dp(10), dp(6));
         summary.setOnClickListener(view -> {
             if (!terminalExpandedMessages.add(groupKey)) {
                 terminalExpandedMessages.remove(groupKey);
@@ -2112,7 +2119,7 @@ public final class MainActivity extends Activity {
             for (ConversationMessage message : tools) {
                 LinearLayout detail = new LinearLayout(this);
                 detail.setOrientation(LinearLayout.VERTICAL);
-                detail.setPadding(dp(14), dp(3), dp(2), dp(7));
+                detail.setPadding(dp(18), dp(3), dp(10), dp(7));
                 TextView title = bodyText(conversationToolTitle(message));
                 title.setTextColor(COLOR_ACCENT_WARM);
                 title.setTextSize(9);
@@ -2157,7 +2164,7 @@ public final class MainActivity extends Activity {
     private View conversationLiveTerminalPanel() {
         LinearLayout panel = new LinearLayout(this);
         panel.setOrientation(LinearLayout.VERTICAL);
-        panel.setPadding(dp(2), dp(10), dp(2), dp(8));
+        panel.setPadding(dp(2), dp(10), dp(2), 0);
 
         LinearLayout heading = new LinearLayout(this);
         heading.setOrientation(LinearLayout.HORIZONTAL);
@@ -2188,10 +2195,17 @@ public final class MainActivity extends Activity {
         terminalLiveOutputText.setTextColor(COLOR_TEXT_MUTED);
         terminalLiveOutputText.setTextSize(11);
         terminalLiveOutputText.setTypeface(Typeface.MONOSPACE);
+        terminalLiveOutputText.setIncludeFontPadding(false);
+        terminalLiveOutputText.setHorizontallyScrolling(false);
+        terminalLiveOutputText.setLineSpacing(0, 1.05f);
+        terminalLiveOutputText.setGravity(Gravity.BOTTOM | Gravity.START);
+        terminalLiveOutputText.setBackgroundColor(COLOR_TERMINAL_BG);
         terminalLiveOutputText.setPadding(0, dp(5), 0, 0);
         terminalLiveOutputText.setMovementMethod(LinkMovementMethod.getInstance());
         terminalLiveOutputText.setHighlightColor(Color.TRANSPARENT);
         terminalLiveOutputText.setTextIsSelectable(true);
+        terminalLiveOutputText.addOnLayoutChangeListener((view, left, top, right, bottom,
+                oldLeft, oldTop, oldRight, oldBottom) -> resizeTerminalToViewport(false));
         panel.addView(terminalLiveOutputText, matchWrap());
         return panel;
     }
@@ -3559,24 +3573,33 @@ public final class MainActivity extends Activity {
         if (terminalText == null || terminalScroll == null) {
             return;
         }
-        int width = terminalScroll.getWidth();
+        TextView viewportText = terminalViewMode == TERMINAL_VIEW_CHAT && terminalLiveOutputText != null
+                ? terminalLiveOutputText : terminalText;
+        int width = viewportText.getWidth();
+        if (width <= 0) {
+            width = terminalScroll.getWidth();
+        }
         int height = terminalScroll.getHeight();
         if (width <= 0 || height <= 0) {
             return;
         }
-        int horizontalPadding = terminalText.getPaddingLeft() + terminalText.getPaddingRight();
-        int verticalPadding = terminalText.getPaddingTop() + terminalText.getPaddingBottom();
-        float charWidth = terminalText.getPaint().measureText("0000000000") / 10f;
+        int horizontalPadding = viewportText.getPaddingLeft() + viewportText.getPaddingRight();
+        int verticalPadding = viewportText.getPaddingTop() + viewportText.getPaddingBottom();
+        float charWidth = viewportText.getPaint().measureText("0000000000") / 10f;
         if (charWidth <= 0f) {
             charWidth = dp(8);
         }
-        int lineHeight = terminalText.getLineHeight();
+        int lineHeight = viewportText.getLineHeight();
         if (lineHeight <= 0) {
             lineHeight = dp(16);
         }
         int usableWidth = Math.max(1, width - horizontalPadding);
         int cols = clamp((int) Math.floor(usableWidth / charWidth), MIN_TERMINAL_COLS, MAX_TERMINAL_COLS);
         int rows = clamp((height - verticalPadding) / lineHeight, MIN_TERMINAL_ROWS, MAX_TERMINAL_ROWS);
+        if (terminalLiveOutputText != null) {
+            terminalLiveOutputText.setMinHeight(rows * lineHeight);
+            terminalLiveOutputText.setGravity(Gravity.BOTTOM | Gravity.START);
+        }
         if (cols == terminalCols && rows == terminalRows && !forceSend) {
             return;
         }
@@ -3774,6 +3797,31 @@ public final class MainActivity extends Activity {
                 : "Terminal history · " + terminalHistoryOffset + " lines back");
     }
 
+    private boolean handleTerminalScrollTouch(View view, MotionEvent event) {
+        if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
+            terminalTouchStartY = event.getY();
+            terminalTouchStartScrollY = terminalScroll == null ? 0 : terminalScroll.getScrollY();
+            return false;
+        }
+        if (event.getActionMasked() != MotionEvent.ACTION_UP || terminalScroll == null) {
+            return false;
+        }
+        float distance = event.getY() - terminalTouchStartY;
+        if (Math.abs(distance) < dp(48)) {
+            return false;
+        }
+        int movedLocally = Math.abs(terminalScroll.getScrollY() - terminalTouchStartScrollY);
+        int lineHeight = terminalLiveOutputText == null ? dp(16) : terminalLiveOutputText.getLineHeight();
+        int lines = clamp(Math.round(Math.abs(distance) / Math.max(1, lineHeight)), 4, terminalRows);
+        if (distance > 0 && !terminalScroll.canScrollVertically(-1) && movedLocally <= dp(24)) {
+            terminalScroll.post(() -> scrollTerminalHistory(-lines));
+        } else if (distance < 0 && terminalHistoryOffset > 0
+                && !terminalScroll.canScrollVertically(1) && movedLocally <= dp(24)) {
+            terminalScroll.post(() -> scrollTerminalHistory(lines));
+        }
+        return false;
+    }
+
     private void setTerminalKeyPage(int page) {
         terminalKeyPage = (page + 4) % 4;
         updateAccessoryTabs();
@@ -3988,7 +4036,12 @@ public final class MainActivity extends Activity {
         input.setHintTextColor(COLOR_TEXT_DIM);
         input.setTextSize(13);
         input.setPadding(dp(8), dp(5), dp(8), dp(5));
-        input.setBackground(inputBackground());
+        input.setBackground(composerInputBackground());
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            GradientDrawable cursor = rounded(COLOR_ACCENT, 1, Color.TRANSPARENT, 0);
+            cursor.setSize(dp(2), dp(20));
+            input.setTextCursorDrawable(cursor);
+        }
     }
 
     private Button compactButton(String label, View.OnClickListener listener) {
@@ -4021,6 +4074,14 @@ public final class MainActivity extends Activity {
         return rounded(COLOR_FIELD, 8, COLOR_BORDER, 1);
     }
 
+    private StateListDrawable composerInputBackground() {
+        StateListDrawable states = new StateListDrawable();
+        states.addState(new int[]{android.R.attr.state_focused},
+                rounded(COLOR_CARD_ALT, 7, COLOR_ACCENT, 1));
+        states.addState(new int[]{}, rounded(COLOR_CARD, 7, COLOR_BORDER, 1));
+        return states;
+    }
+
     private GradientDrawable rounded(int color, int radiusDp, int strokeColor, int strokeDp) {
         GradientDrawable drawable = new GradientDrawable();
         drawable.setColor(color);