Support copying links on long click.

Fixes #6343
Closes #6454

res/layout/conversation_item_received.xml

@@ -75,9 +75,7 @@
                     android:textAppearance="?android:attr/textAppearanceSmall"
                     android:textColor="?conversation_item_received_text_primary_color"
                     android:textColorLink="?conversation_item_received_text_primary_color"
-                    android:textSize="@dimen/conversation_item_body_text_size"
-                    android:autoLink="all"
-                    android:linksClickable="true" />
+                    android:textSize="@dimen/conversation_item_body_text_size" />
 
             <LinearLayout android:layout_width="wrap_content"
                           android:layout_height="wrap_content"

res/layout/conversation_item_sent.xml

@@ -57,12 +57,10 @@
 
             <org.thoughtcrime.securesms.components.emoji.EmojiTextView
                     android:id="@+id/conversation_item_body"
-                    android:autoLink="all"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:paddingLeft="4dp"
                     android:paddingRight="4dp"
-                    android:linksClickable="true"
                     android:textAppearance="?android:attr/textAppearanceSmall"
                     android:textColor="?conversation_item_sent_text_primary_color"
                     android:textColorLink="?conversation_item_sent_text_primary_color"

res/values/strings.xml

@@ -97,6 +97,7 @@
     <string name="ConversationItem_click_to_approve_unencrypted_mms_dialog_title">Fallback to unencrypted MMS?</string>
     <string name="ConversationItem_click_to_approve_unencrypted_dialog_message">This message will <b>not</b> be encrypted because the recipient is no longer a Signal user.\n\nSend unsecured message?</string>
     <string name="ConversationItem_unable_to_open_media">Can\'t find an app able to open this media.</string>
+    <string name="ConversationItem_copied_text">Copied %s</string>
     <string name="ConversationItem_from_s">from %s</string>
     <string name="ConversationItem_to_s">to %s</string>
 

src/org/thoughtcrime/securesms/ConversationItem.java

@@ -28,7 +28,10 @@ import android.os.AsyncTask;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v7.app.AlertDialog;
+import android.text.SpannableString;
+import android.text.Spanned;
 import android.text.TextUtils;
+import android.text.style.URLSpan;
 import android.text.util.Linkify;
 import android.util.AttributeSet;
 import android.util.Log;
@@ -69,6 +72,8 @@ import org.thoughtcrime.securesms.recipients.Recipients;
 import org.thoughtcrime.securesms.service.ExpiringMessageManager;
 import org.thoughtcrime.securesms.util.DateUtils;
 import org.thoughtcrime.securesms.util.DynamicTheme;
+import org.thoughtcrime.securesms.util.LongClickCopySpan;
+import org.thoughtcrime.securesms.util.LongClickMovementMethod;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
 import org.thoughtcrime.securesms.util.Util;
 import org.thoughtcrime.securesms.util.dualsim.SubscriptionInfoCompat;
@@ -164,6 +169,8 @@ public class ConversationItem extends LinearLayout
 
     bodyText.setOnLongClickListener(passthroughClickListener);
     bodyText.setOnClickListener(passthroughClickListener);
+
+    bodyText.setMovementMethod(LongClickMovementMethod.getInstance(getContext()));
   }
 
   @Override
@@ -266,7 +273,6 @@ public class ConversationItem extends LinearLayout
 
   private void setInteractionState(MessageRecord messageRecord) {
     setSelected(batchSelected.contains(messageRecord));
-    bodyText.setAutoLinkMask(batchSelected.isEmpty() ? Linkify.ALL : 0);
 
     if (mediaThumbnailStub.resolved()) {
       mediaThumbnailStub.get().setFocusable(!shouldInterceptClicks(messageRecord) && batchSelected.isEmpty());
@@ -310,7 +316,7 @@ public class ConversationItem extends LinearLayout
     if (isCaptionlessMms(messageRecord)) {
       bodyText.setVisibility(View.GONE);
     } else {
-      bodyText.setText(messageRecord.getDisplayBody());
+      bodyText.setText(linkifyMessageBody(messageRecord.getDisplayBody(), batchSelected.isEmpty()));
       bodyText.setVisibility(View.VISIBLE);
     }
   }
@@ -370,6 +376,20 @@ public class ConversationItem extends LinearLayout
     }
   }
 
+  private SpannableString linkifyMessageBody(SpannableString messageBody, boolean shouldLinkifyAllLinks) {
+    boolean hasLinks = Linkify.addLinks(messageBody, shouldLinkifyAllLinks ? Linkify.ALL : 0);
+
+    if (hasLinks) {
+      URLSpan[] urlSpans = messageBody.getSpans(0, messageBody.length(), URLSpan.class);
+      for (URLSpan urlSpan : urlSpans) {
+        int start = messageBody.getSpanStart(urlSpan);
+        int end = messageBody.getSpanEnd(urlSpan);
+        messageBody.setSpan(new LongClickCopySpan(urlSpan.getURL()), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+      }
+    }
+    return messageBody;
+  }
+
   private void setStatusIcons(MessageRecord messageRecord) {
     indicatorText.setVisibility(View.GONE);
 
@@ -578,6 +598,9 @@ public class ConversationItem extends LinearLayout
 
     @Override
     public boolean onLongClick(View v) {
+      if (bodyText.hasSelection()) {
+        return false;
+      }
       performLongClick();
       return true;
     }

src/org/thoughtcrime/securesms/util/LongClickCopySpan.java

@@ -0,0 +1,73 @@
+package org.thoughtcrime.securesms.util;
+
+import android.annotation.TargetApi;
+import android.content.ClipData;
+import android.content.Context;
+import android.support.annotation.ColorInt;
+import android.text.TextPaint;
+import android.text.style.URLSpan;
+import android.view.View;
+import android.widget.Toast;
+
+import org.thoughtcrime.securesms.R;
+
+public class LongClickCopySpan extends URLSpan {
+  private static final String PREFIX_MAILTO = "mailto:";
+  private static final String PREFIX_TEL = "tel:";
+
+  private boolean isHighlighted;
+  @ColorInt
+  private int highlightColor;
+
+  public LongClickCopySpan(String url) {
+    super(url);
+  }
+
+  void onLongClick(View widget) {
+    Context context = widget.getContext();
+    String preparedUrl = prepareUrl(getURL());
+    copyUrl(context, preparedUrl);
+    Toast.makeText(context,
+            context.getString(R.string.ConversationItem_copied_text, preparedUrl), Toast.LENGTH_SHORT).show();
+  }
+
+  @Override
+  public void updateDrawState(TextPaint ds) {
+    super.updateDrawState(ds);
+    ds.bgColor = highlightColor;
+    ds.setUnderlineText(!isHighlighted);
+  }
+
+  void setHighlighted(boolean highlighted, @ColorInt int highlightColor) {
+    this.isHighlighted = highlighted;
+    this.highlightColor = highlightColor;
+  }
+
+  private void copyUrl(Context context, String url) {
+    int sdk = android.os.Build.VERSION.SDK_INT;
+    if (sdk < android.os.Build.VERSION_CODES.HONEYCOMB) {
+      @SuppressWarnings("deprecation") android.text.ClipboardManager clipboard =
+              (android.text.ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);
+      clipboard.setText(url);
+    } else {
+      copyUriSdk11(context, url);
+    }
+  }
+
+  @TargetApi(android.os.Build.VERSION_CODES.HONEYCOMB)
+  private void copyUriSdk11(Context context, String url) {
+    android.content.ClipboardManager clipboard =
+            (android.content.ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);
+    ClipData clip = ClipData.newPlainText(context.getString(R.string.app_name), url);
+    clipboard.setPrimaryClip(clip);
+  }
+
+  private String prepareUrl(String url) {
+    if (url.startsWith(PREFIX_MAILTO)) {
+      return url.substring(PREFIX_MAILTO.length());
+    } else if (url.startsWith(PREFIX_TEL)) {
+      return url.substring(PREFIX_TEL.length());
+    }
+    return url;
+  }
+}

src/org/thoughtcrime/securesms/util/LongClickMovementMethod.java

@@ -0,0 +1,103 @@
+package org.thoughtcrime.securesms.util;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.graphics.Color;
+import android.support.v4.content.ContextCompat;
+import android.text.Layout;
+import android.text.Selection;
+import android.text.Spannable;
+import android.text.method.LinkMovementMethod;
+import android.view.GestureDetector;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.TextView;
+
+import org.thoughtcrime.securesms.R;
+
+public class LongClickMovementMethod extends LinkMovementMethod {
+  @SuppressLint("StaticFieldLeak")
+  private static LongClickMovementMethod sInstance;
+
+  private final GestureDetector gestureDetector;
+  private View widget;
+  private LongClickCopySpan currentSpan;
+
+  private LongClickMovementMethod(final Context context) {
+    gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
+      @Override
+      public void onLongPress(MotionEvent e) {
+        if (currentSpan != null && widget != null) {
+          currentSpan.onLongClick(widget);
+          widget = null;
+          currentSpan = null;
+        }
+      }
+
+      @Override
+      public boolean onSingleTapUp(MotionEvent e) {
+        if (currentSpan != null && widget != null) {
+          currentSpan.onClick(widget);
+          widget = null;
+          currentSpan = null;
+        }
+        return true;
+      }
+    });
+  }
+
+  @Override
+  public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
+    int action = event.getAction();
+
+    if (action == MotionEvent.ACTION_UP ||
+            action == MotionEvent.ACTION_DOWN) {
+      int x = (int) event.getX();
+      int y = (int) event.getY();
+
+      x -= widget.getTotalPaddingLeft();
+      y -= widget.getTotalPaddingTop();
+
+      x += widget.getScrollX();
+      y += widget.getScrollY();
+
+      Layout layout = widget.getLayout();
+      int line = layout.getLineForVertical(y);
+      int off = layout.getOffsetForHorizontal(line, x);
+
+      LongClickCopySpan longClickCopySpan[] = buffer.getSpans(off, off, LongClickCopySpan.class);
+      if (longClickCopySpan.length != 0) {
+        LongClickCopySpan aSingleSpan = longClickCopySpan[0];
+        if (action == MotionEvent.ACTION_DOWN) {
+          Selection.setSelection(buffer, buffer.getSpanStart(aSingleSpan),
+                  buffer.getSpanEnd(aSingleSpan));
+          aSingleSpan.setHighlighted(true,
+                  ContextCompat.getColor(widget.getContext(), R.color.touch_highlight));
+        } else {
+          Selection.removeSelection(buffer);
+          aSingleSpan.setHighlighted(false, Color.TRANSPARENT);
+        }
+
+        this.currentSpan = aSingleSpan;
+        this.widget = widget;
+        return gestureDetector.onTouchEvent(event);
+      }
+    } else if (action == MotionEvent.ACTION_CANCEL) {
+      // Remove Selections.
+      LongClickCopySpan[] spans = buffer.getSpans(Selection.getSelectionStart(buffer),
+              Selection.getSelectionEnd(buffer), LongClickCopySpan.class);
+      for (LongClickCopySpan aSpan : spans) {
+        aSpan.setHighlighted(false, Color.TRANSPARENT);
+      }
+      Selection.removeSelection(buffer);
+    }
+    return super.onTouchEvent(widget, buffer, event);
+  }
+
+  public static LongClickMovementMethod getInstance(Context context) {
+    if (sInstance == null) {
+      sInstance = new LongClickMovementMethod(context.getApplicationContext());
+    }
+    return sInstance;
+  }
+}