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-rw-r--r--api/current.xml41
-rw-r--r--core/java/android/text/method/ArrowKeyMovementMethod.java32
-rw-r--r--core/java/android/text/method/Touch.java22
-rw-r--r--core/java/android/widget/TextView.java56
4 files changed, 147 insertions, 4 deletions
diff --git a/api/current.xml b/api/current.xml
index dbfa2b9..a68e510 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -110598,6 +110598,36 @@
deprecated="not deprecated"
visibility="public"
>
+<method name="getInitialScrollX"
+ return="int"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="true"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="widget" type="android.widget.TextView">
+</parameter>
+<parameter name="buffer" type="android.text.Spannable">
+</parameter>
+</method>
+<method name="getInitialScrollY"
+ return="int"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="true"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="widget" type="android.widget.TextView">
+</parameter>
+<parameter name="buffer" type="android.text.Spannable">
+</parameter>
+</method>
<method name="onTouchEvent"
return="boolean"
abstract="false"
@@ -157343,6 +157373,17 @@
visibility="public"
>
</method>
+<method name="moveCursorToVisibleOffset"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
<method name="onBeginBatchEdit"
return="void"
abstract="false"
diff --git a/core/java/android/text/method/ArrowKeyMovementMethod.java b/core/java/android/text/method/ArrowKeyMovementMethod.java
index 17c7a6c..92f6289 100644
--- a/core/java/android/text/method/ArrowKeyMovementMethod.java
+++ b/core/java/android/text/method/ArrowKeyMovementMethod.java
@@ -18,6 +18,7 @@ package android.text.method;
import android.util.Log;
import android.view.KeyEvent;
+import android.graphics.Rect;
import android.text.*;
import android.widget.TextView;
import android.view.View;
@@ -202,23 +203,54 @@ implements MovementMethod
public boolean onTouchEvent(TextView widget, Spannable buffer,
MotionEvent event) {
+ int initialScrollX = -1, initialScrollY = -1;
+ if (event.getAction() == MotionEvent.ACTION_UP) {
+ initialScrollX = Touch.getInitialScrollX(widget, buffer);
+ initialScrollY = Touch.getInitialScrollY(widget, buffer);
+ }
+
boolean handled = Touch.onTouchEvent(widget, buffer, event);
if (widget.isFocused() && !widget.didTouchFocusSelect()) {
if (event.getAction() == MotionEvent.ACTION_UP) {
+ // If we have scrolled, then the up shouldn't move the cursor,
+ // but we do need to make sure the cursor is still visible at
+ // the current scroll offset to avoid the scroll jumping later
+ // to show it.
+ if ((initialScrollY >= 0 && initialScrollY != widget.getScrollY()) ||
+ (initialScrollX >= 0 && initialScrollX != widget.getScrollX())) {
+ widget.moveCursorToVisibleOffset();
+ return true;
+ }
+
int x = (int) event.getX();
int y = (int) event.getY();
x -= widget.getTotalPaddingLeft();
y -= widget.getTotalPaddingTop();
+ // Clamp the position to inside of the view.
+ if (x < 0) {
+ x = 0;
+ } else if (x >= (widget.getWidth()-widget.getTotalPaddingRight())) {
+ x = widget.getWidth()-widget.getTotalPaddingRight() - 1;
+ }
+ if (y < 0) {
+ y = 0;
+ } else if (y >= (widget.getHeight()-widget.getTotalPaddingBottom())) {
+ y = widget.getHeight()-widget.getTotalPaddingBottom() - 1;
+ }
+
x += widget.getScrollX();
y += widget.getScrollY();
Layout layout = widget.getLayout();
int line = layout.getLineForVertical(y);
+
int off = layout.getOffsetForHorizontal(line, x);
+ // XXX should do the same adjust for x as we do for the line.
+
boolean cap = (MetaKeyKeyListener.getMetaState(buffer,
KeyEvent.META_SHIFT_ON) == 1) ||
(MetaKeyKeyListener.getMetaState(buffer,
diff --git a/core/java/android/text/method/Touch.java b/core/java/android/text/method/Touch.java
index 65036ad..f2fb9cb 100644
--- a/core/java/android/text/method/Touch.java
+++ b/core/java/android/text/method/Touch.java
@@ -21,7 +21,6 @@ import android.text.NoCopySpan;
import android.text.Layout.Alignment;
import android.text.Spannable;
import android.view.MotionEvent;
-import android.view.View;
import android.view.ViewConfiguration;
import android.widget.TextView;
@@ -82,8 +81,9 @@ public class Touch {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
- buffer.setSpan(new DragState(event.getX(), event.getY()),
- 0, 0, Spannable.SPAN_MARK_MARK);
+ buffer.setSpan(new DragState(event.getX(), event.getY(),
+ widget.getScrollX(), widget.getScrollY()),
+ 0, 0, Spannable.SPAN_MARK_MARK);
return true;
case MotionEvent.ACTION_UP:
@@ -142,15 +142,29 @@ public class Touch {
return false;
}
+ public static int getInitialScrollX(TextView widget, Spannable buffer) {
+ DragState[] ds = buffer.getSpans(0, buffer.length(), DragState.class);
+ return ds.length > 0 ? ds[0].mScrollX : -1;
+ }
+
+ public static int getInitialScrollY(TextView widget, Spannable buffer) {
+ DragState[] ds = buffer.getSpans(0, buffer.length(), DragState.class);
+ return ds.length > 0 ? ds[0].mScrollY : -1;
+ }
+
private static class DragState implements NoCopySpan {
public float mX;
public float mY;
+ public int mScrollX;
+ public int mScrollY;
public boolean mFarEnough;
public boolean mUsed;
- public DragState(float x, float y) {
+ public DragState(float x, float y, int scrollX, int scrollY) {
mX = x;
mY = y;
+ mScrollX = scrollX;
+ mScrollY = scrollY;
}
}
}
diff --git a/core/java/android/widget/TextView.java b/core/java/android/widget/TextView.java
index 136752b..01b65b6 100644
--- a/core/java/android/widget/TextView.java
+++ b/core/java/android/widget/TextView.java
@@ -5421,6 +5421,62 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
return changed;
}
+ /**
+ * Move the cursor, if needed, so that it is at an offset that is visible
+ * to the user. This will not move the cursor if it represents more than
+ * one character (a selection range). This will only work if the
+ * TextView contains spannable text; otherwise it will do nothing.
+ */
+ public boolean moveCursorToVisibleOffset() {
+ if (!(mText instanceof Spannable)) {
+ return false;
+ }
+ int start = Selection.getSelectionStart(mText);
+ int end = Selection.getSelectionEnd(mText);
+ if (start != end) {
+ return false;
+ }
+
+ // First: make sure the line is visible on screen:
+
+ int line = mLayout.getLineForOffset(start);
+
+ final int top = mLayout.getLineTop(line);
+ final int bottom = mLayout.getLineTop(line+1);
+ final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
+ int vslack = (bottom - top) / 2;
+ if (vslack > vspace / 4)
+ vslack = vspace / 4;
+ final int vs = mScrollY;
+
+ if (top < (vs+vslack)) {
+ line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
+ } else if (bottom > (vspace+vs-vslack)) {
+ line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
+ }
+
+ // Next: make sure the character is visible on screen:
+
+ final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
+ final int hs = mScrollX;
+ final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
+ final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
+
+ int newStart = start;
+ if (newStart < leftChar) {
+ newStart = leftChar;
+ } else if (newStart > rightChar) {
+ newStart = rightChar;
+ }
+
+ if (newStart != start) {
+ Selection.setSelection((Spannable)mText, newStart);
+ return true;
+ }
+
+ return false;
+ }
+
@Override
public void computeScroll() {
if (mScroller != null) {
generated by cgit v1.1 at 2025-08-15 15:00:37 +0000