Add "Paste as plain text" into text selection toolbar overflow

content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java

Index: content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java b/content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java
index a6f50a38e44ab3251eb55128cfe9d5ae6b551e84..5bc0aeccb4d5788178c67a57a0766393abdbd0ea 100644
--- a/content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java
+++ b/content/public/android/java/src/org/chromium/content/browser/SelectionPopupController.java
@@ -7,6 +7,8 @@ package org.chromium.content.browser;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
+import android.content.ClipData;
+import android.content.ClipDescription;
 import android.content.ClipboardManager;
 import android.content.Context;
 import android.content.Intent;
@@ -16,7 +18,11 @@ import android.content.res.Resources;
 import android.graphics.Rect;
 import android.os.Build;
 import android.provider.Browser;
+import android.text.Spanned;
 import android.text.TextUtils;
+import android.text.style.CharacterStyle;
+import android.text.style.ParagraphStyle;
+import android.text.style.UpdateAppearance;
 import android.view.ActionMode;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -102,6 +108,7 @@ public class SelectionPopupController extends ActionModeCallbackHelper {
     private boolean mEditable;
     private boolean mIsPasswordType;
     private boolean mIsInsertion;
+    private boolean mCanEditRichly;

[amaralp, 2017/04/13 20:40:18]

This is currently only used for the paste menu so maybe call this
|mCanEditRichlyForPastePopup|.

[Shimi Zhang, 2017/04/15 01:17:15]

Done.

 
     private boolean mUnselectAllOnDismiss;
     private String mLastSelectedText;
@@ -251,6 +258,10 @@ public class SelectionPopupController extends ActionModeCallbackHelper {
         return actionMode;
     }
 
+    void setCanEditRichly(boolean canEditRichly) {

[amaralp, 2017/04/13 20:40:17]

This also won't be needed.

[Shimi Zhang, 2017/04/15 01:17:15]

Done.

+        mCanEditRichly = canEditRichly;
+    }
+
     void createAndShowPastePopup(int x, int y) {
         if (mView.getParent() == null || mView.getVisibility() != View.VISIBLE) {
             return;
@@ -266,9 +277,20 @@ public class SelectionPopupController extends ActionModeCallbackHelper {
             }
 
             @Override
+            public void pasteAsPlainText() {
+                mWebContents.pasteAsPlainText();
+                mWebContents.dismissTextHandles();
+            }
+
+            @Override
             public boolean canPaste() {
                 return SelectionPopupController.this.canPaste();
             }
+
+            @Override
+            public boolean canPasteAsPlainText() {
+                return SelectionPopupController.this.canPasteAsPlainText();
+            }
         };
         Context windowContext = mWindowAndroid.getContext().get();
         if (windowContext == null) return;
@@ -427,6 +449,11 @@ public class SelectionPopupController extends ActionModeCallbackHelper {
 
         if (!isSelectionEditable() || !canPaste()) {
             menu.removeItem(R.id.select_action_menu_paste);
+            menu.removeItem(R.id.select_action_menu_paste_as_plain_text);

[amaralp, 2017/04/13 20:40:18]

This is only used for the selection popup menu (the one with "Cut, Copy, Paste,
..."). That menu isn't currently created using a context menu so for now you
should remove the plain text option no matter what. I am currently working on a
CL that will make this type of menu also go through the context menu code so
soon you will be able to do this.

[Shimi Zhang, 2017/04/15 01:17:15]

Done.

+        }
+
+        if (!canPasteAsPlainText()) {
+            menu.removeItem(R.id.select_action_menu_paste_as_plain_text);
         }
 
         if (isInsertion()) {
@@ -466,6 +493,30 @@ public class SelectionPopupController extends ActionModeCallbackHelper {
         return clipMgr.hasPrimaryClip();
     }
 
+    // if need to show paste as plain text.
+    private boolean canPasteAsPlainText() {
+        if (!mCanEditRichly) return false;
+        ClipboardManager clipMgr =
+                (ClipboardManager) mContext.getSystemService(Context.CLIPBOARD_SERVICE);
+        if (!clipMgr.hasPrimaryClip()) return false;
+
+        // In case that plain text is a Spanned.
+        ClipData clipData = clipMgr.getPrimaryClip();
+        ClipDescription description = clipData.getDescription();
+        CharSequence text = clipData.getItemAt(0).getText();
+        boolean isPlainType = description.hasMimeType(ClipDescription.MIMETYPE_TEXT_PLAIN);
+        if (isPlainType && (text instanceof Spanned)) {
+            Spanned spanned = (Spanned) text;
+            Class<?>[] styles = {
+                    CharacterStyle.class, ParagraphStyle.class, UpdateAppearance.class};
+            for (Class<?> style : styles) {
+                Object[] spans = spanned.getSpans(0, spanned.length(), style);
+                if (spans != null && spans.length > 0) return true;
+            }
+        }
+        return description.hasMimeType(ClipDescription.MIMETYPE_TEXT_HTML);
+    }
+
     private void updateAssistMenuItem(Menu menu) {
         // There is no Assist functionality before Android O.
         if (!BuildInfo.isAtLeastO() || mAssistMenuItemId == 0) return;
@@ -538,6 +589,9 @@ public class SelectionPopupController extends ActionModeCallbackHelper {
         } else if (id == R.id.select_action_menu_paste) {
             paste();
             mode.finish();
+        } else if (id == R.id.select_action_menu_paste_as_plain_text) {

[amaralp, 2017/04/13 20:40:18]

Again this code is for the selection action mode and for now it won't have the
"Paste as plain text" option.

[Shimi Zhang, 2017/04/15 01:17:15]

Done.

+            pasteAsPlainText();
+            mode.finish();
         } else if (id == R.id.select_action_menu_share) {
             share();
             mode.finish();
@@ -651,6 +705,14 @@ public class SelectionPopupController extends ActionModeCallbackHelper {
     }
 
     /**
+     * Perform a paste as plain text action.
+     */
+    @VisibleForTesting
+    void pasteAsPlainText() {

[amaralp, 2017/04/13 20:40:18]

Could you add tests for your change?

[Shimi Zhang, 2017/04/15 01:17:15]

Done.

+        mWebContents.pasteAsPlainText();
+    }
+
+    /**
      * Perform a share action.
      */
     @VisibleForTesting