Allow to remove all checked items (fix #1521)

app/src/main/java/it/niedermann/owncloud/notes/edit/BaseNoteFragment.java

@@ -236,7 +236,10 @@ public boolean onOptionsItemSelected(MenuItem item) {
         } else if (itemId == R.id.menu_title) {
             showEditTitleDialog();
             return true;
-        } else if (itemId == R.id.menu_move) {
+        } else if (itemId == R.id.menu_remove_checked_items) {
+            removeCheckedItems();
+            return true;
+        }  else if (itemId == R.id.menu_move) {
             executor.submit(() -> AccountPickerDialogFragment
                     .newInstance(new ArrayList<>(repo.getAccounts()), note.getAccountId())
                     .show(requireActivity().getSupportFragmentManager(), BaseNoteFragment.class.getSimpleName()));
@@ -345,7 +348,7 @@ private void showCategorySelector() {
     }
 
     /**
-     * Opens a dialog in order to chose a category
+     * Opens a dialog in order to edit the title
      */
     public void showEditTitleDialog() {
         saveNote(null);
@@ -360,6 +363,28 @@ public void showEditTitleDialog() {
         editTitleFragment.show(manager, fragmentId);
     }
 
+    /**
+     * Removes all checked items from a note
+     *
+     * @return
+     */
+    public String removeCheckedItems() {
+        Log.d(TAG, "removeCheckedItems()");
+        if (note != null) {
+            final var oldContent = note.getContent();
+            final var newContent = NoteUtil.getContentWithoutCheckedItems(oldContent);
+            if (!oldContent.equals(newContent)) {
+                note.setContent(newContent);
+            }
+
+            return newContent;
+        } else {
+            Log.e(TAG, "note is null");
+        }
+
+        return "";
+    }
+
     @Override
     public void onCategoryChosen(String category) {
         repo.setCategory(localAccount, note.getId(), category);

app/src/main/java/it/niedermann/owncloud/notes/edit/NoteEditFragment.java

@@ -255,6 +255,16 @@ protected void colorWithText(@NonNull String newText, @Nullable Integer current,
         }
     }
 
+    public String removeCheckedItems() {
+        String newContent = super.removeCheckedItems();
+
+        if (note != null) {
+            binding.editContent.setMarkdownString(newContent);
+        }
+
+        return newContent;
+    }
+
     @Override
     public void applyBrand(int color) {
         super.applyBrand(color);

app/src/main/java/it/niedermann/owncloud/notes/edit/NotePreviewFragment.java

@@ -152,6 +152,16 @@ protected void colorWithText(@NonNull String newText, @Nullable Integer current,
         }
     }
 
+    public String removeCheckedItems() {
+        String newContent = super.removeCheckedItems();
+
+        if (note != null) {
+            binding.singleNoteContent.setMarkdownString(newContent);
+        }
+
+        return newContent;
+    }
+
     @Override
     protected String getContent() {
         return changedText;

app/src/main/java/it/niedermann/owncloud/notes/edit/NoteReadonlyFragment.java

@@ -25,6 +25,7 @@ public void onPrepareOptionsMenu(@NonNull Menu menu) {
         menu.findItem(R.id.menu_share).setVisible(false);
         menu.findItem(R.id.menu_move).setVisible(false);
         menu.findItem(R.id.menu_category).setVisible(false);
+        menu.findItem(R.id.menu_remove_checked_items).setVisible(false);
         menu.findItem(R.id.menu_title).setVisible(false);
         if (menu.findItem(MENU_ID_PIN) != null)
             menu.findItem(MENU_ID_PIN).setVisible(false);

app/src/main/java/it/niedermann/owncloud/notes/shared/util/NoteUtil.java

@@ -12,6 +12,9 @@
 import static it.niedermann.android.markdown.MarkdownUtil.removeMarkdown;
 import static it.niedermann.android.markdown.MarkdownUtil.replaceCheckboxesWithEmojis;
 
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 /**
  * Provides basic functionality for Note operations.
  * Created by stefan on 06.10.15.
@@ -123,6 +126,29 @@ public static String getLineWithoutMarkdown(@NonNull String content, int lineNum
         return line;
     }
 
+    /**
+     * Strips all lines beginning with a filled checkbox from the Markdown.
+     *
+     * @param content    String
+     * @return newContent String
+     */
+    @NonNull
+    public static String getContentWithoutCheckedItems(@NonNull String content) {
+        final Pattern pattern = Pattern.compile(
+                "^ *[-+*] \\[[xX]\\].*$",
+                Pattern.MULTILINE
+        );
+        final Matcher matcher = pattern.matcher(content);
+
+        // We can't just replace the matcher with an empty string as this would
+        // let a blank line. To be able to remove the blank line as well, we set
+        // a random-ish token that we will then match with the EOL as well and
+        // remove them all together.
+        return matcher
+                .replaceAll("RANDOM-ISH_TEXT_TO_REPLACE")
+                .replaceAll("RANDOM-ISH_TEXT_TO_REPLACE\n?", "");
+    }
+
     @NonNull
     public static String extendCategory(@NonNull String category) {
         return category.replace("/", " / ");

app/src/main/res/menu/menu_note_fragment.xml

@@ -28,6 +28,12 @@
         android:orderInCategory="100"
         android:title="@string/menu_change_category"
         app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/menu_remove_checked_items"
+        android:icon="@drawable/ic_delete_grey600_24dp"
+        android:orderInCategory="100"
+        android:title="@string/menu_remove_checked_items"
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/menu_share"
         android:icon="@drawable/ic_share_white_24dp"

app/src/main/res/values-fr/strings.xml

@@ -173,6 +173,7 @@
     <string name="append_to_note">Ajouter à la note</string>
     <string name="change_note_title">Modifier le titre de la note</string>
     <string name="menu_edit_title">Modifier le titre</string>
+    <string name="menu_remove_checked_items">Supprimer éléments cochés</string>
     <string name="simple_security">Sécurité</string>
     <string name="appearance_and_behavior">Apparence et comportement</string>
     <string name="simple_synchronization">Synchronisation</string>

app/src/main/res/values/strings.xml

@@ -209,6 +209,7 @@
     <string name="append_to_note">Append to note</string>
     <string name="change_note_title">Change note title</string>
     <string name="menu_edit_title">Edit title</string>
+    <string name="menu_remove_checked_items">Remove checked items</string>
     <string name="simple_security">Security</string>
     <string name="appearance_and_behavior">Appearance and behavior</string>
     <string name="simple_synchronization">Synchronization</string>

app/src/test/java/it/niedermann/owncloud/notes/shared/util/NoteUtilTest.java

@@ -99,4 +99,40 @@ public void testGenerateNoteExcerpt_sdk_30() {
         // content has markdown while titles markdown is already stripped
         assertEquals("Title   Bar", NoteUtil.generateNoteExcerpt("# Title\n- Title\n- Bar", "Title"));
     }
+
+    @Test
+    public void testGetContentWithoutCheckedItems() {
+        String newLine = System.getProperty("line.separator");
+
+        String multilineWithCheckboxes = "- [ ] Line A"
+                .concat(newLine)
+                .concat("- [x] Line B")
+                .concat(newLine)
+                .concat("- [X] Line C")
+                .concat(newLine)
+                .concat(newLine)
+                .concat("* [x] Line D")
+                .concat(newLine)
+                .concat("* [ ] Line E")
+                .concat(newLine)
+                .concat("+ [x] Line F")
+                .concat(newLine)
+                .concat("+ [ ] Line G")
+                .concat(newLine)
+                .concat("    + [ ] G1")
+                .concat(newLine)
+                .concat("    + [x] G2");
+
+        String expected = "- [ ] Line A"
+                .concat(newLine)
+                .concat(newLine)
+                .concat("* [ ] Line E")
+                .concat(newLine)
+                .concat("+ [ ] Line G")
+                .concat(newLine)
+                .concat("    + [ ] G1")
+                .concat(newLine);
+
+        assertEquals(expected, NoteUtil.getContentWithoutCheckedItems(multilineWithCheckboxes));
+    }
 }