Support gn text objects

resources/META-INF/plugin.xml

@@ -419,5 +419,7 @@
     <!-- Visual Selection of last Search Pattern (gn) -->
     <action id="VimVisualSelectNextSearch" class="com.maddyhome.idea.vim.action.motion.gn.VisualSelectNextSearch" text="Visual Select Next Search"/>
     <action id="VimVisualSelectPreviousSearch" class="com.maddyhome.idea.vim.action.motion.gn.VisualSelectPreviousSearch" text="Visual Select Previous Search"/>
+    <action id="VimGnNextTextObject" class="com.maddyhome.idea.vim.action.motion.gn.GnNextTextObject" text="Gn Next Text Object"/>
+    <action id="VimGnPreviousTextObject" class="com.maddyhome.idea.vim.action.motion.gn.GnPreviousTextObject" text="Gn Previous Text Object"/>
   </actions>
 </idea-plugin>

src/com/maddyhome/idea/vim/RegisterActions.java

@@ -179,6 +179,14 @@ class RegisterActions {
                           EnumSet.of(CommandFlags.FLAG_MOT_CHARACTERWISE, CommandFlags.FLAG_MOT_INCLUSIVE, CommandFlags.FLAG_TEXT_BLOCK),
                           new Shortcut[]{new Shortcut("at")}
     );
+    parser.registerAction(MappingMode.O, "VimGnNextTextObject", Command.Type.MOTION,
+                          EnumSet.of(CommandFlags.FLAG_MOT_CHARACTERWISE, CommandFlags.FLAG_MOT_INCLUSIVE),
+                          new Shortcut[]{new Shortcut("gn")}
+    );
+    parser.registerAction(MappingMode.O, "VimGnPreviousTextObject", Command.Type.MOTION,
+                          EnumSet.of(CommandFlags.FLAG_MOT_CHARACTERWISE, CommandFlags.FLAG_MOT_INCLUSIVE),
+                          new Shortcut[]{new Shortcut("gN")}
+    );
     parser.registerAction(MappingMode.NO, "VimResetMode", Command.Type.RESET, new Shortcut(new KeyStroke[]{
       KeyStroke.getKeyStroke(KeyEvent.VK_BACK_SLASH, KeyEvent.CTRL_MASK),
       KeyStroke.getKeyStroke(KeyEvent.VK_N, KeyEvent.CTRL_MASK)

src/com/maddyhome/idea/vim/action/motion/gn/GnNextTextObject.kt

@@ -0,0 +1,42 @@
+/*
+ * IdeaVim - Vim emulator for IDEs based on the IntelliJ platform
+ * Copyright (C) 2003-2019 The IdeaVim authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.maddyhome.idea.vim.action.motion.gn
+
+import com.intellij.openapi.actionSystem.DataContext
+import com.intellij.openapi.editor.Caret
+import com.intellij.openapi.editor.Editor
+import com.maddyhome.idea.vim.VimPlugin
+import com.maddyhome.idea.vim.action.motion.TextObjectAction
+import com.maddyhome.idea.vim.command.Argument
+import com.maddyhome.idea.vim.common.TextRange
+import com.maddyhome.idea.vim.handler.TextObjectActionHandler
+
+/**
+ * @author Alex Plate
+ */
+
+private object GnNextTextObjectHandler : TextObjectActionHandler() {
+  override fun getRange(editor: Editor, caret: Caret, context: DataContext, count: Int, rawCount: Int, argument: Argument?): TextRange? {
+    val range = VimPlugin.getSearch().getNextSearchRange(editor, count, true)
+    val adj = VimPlugin.getVisualMotion().selectionAdj
+    return range?.let { TextRange(it.startOffset, it.endOffset - adj) }
+  }
+}
+
+class GnNextTextObject : TextObjectAction(GnNextTextObjectHandler)

src/com/maddyhome/idea/vim/action/motion/gn/GnPreviousTextObject.kt

@@ -0,0 +1,42 @@
+/*
+ * IdeaVim - Vim emulator for IDEs based on the IntelliJ platform
+ * Copyright (C) 2003-2019 The IdeaVim authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.maddyhome.idea.vim.action.motion.gn
+
+import com.intellij.openapi.actionSystem.DataContext
+import com.intellij.openapi.editor.Caret
+import com.intellij.openapi.editor.Editor
+import com.maddyhome.idea.vim.VimPlugin
+import com.maddyhome.idea.vim.action.motion.TextObjectAction
+import com.maddyhome.idea.vim.command.Argument
+import com.maddyhome.idea.vim.common.TextRange
+import com.maddyhome.idea.vim.handler.TextObjectActionHandler
+
+/**
+ * @author Alex Plate
+ */
+
+private object GnPreviousTextObjectHandler : TextObjectActionHandler() {
+  override fun getRange(editor: Editor, caret: Caret, context: DataContext, count: Int, rawCount: Int, argument: Argument?): TextRange? {
+    val range = VimPlugin.getSearch().getNextSearchRange(editor, count, false)
+    val adj = VimPlugin.getVisualMotion().selectionAdj
+    return range?.let { TextRange(it.startOffset, it.endOffset - adj) }
+  }
+}
+
+class GnPreviousTextObject : TextObjectAction(GnPreviousTextObjectHandler)

src/com/maddyhome/idea/vim/group/MotionGroup.java

@@ -1352,44 +1352,16 @@ public class MotionGroup {
   }
 
   public int selectNextSearch(@NotNull Editor editor, int count, boolean forwards) {
-    editor.getCaretModel().removeSecondaryCarets();
-    TextRange current = VimPlugin.getSearch().findUnderCaret(editor);
     final Caret caret = editor.getCaretModel().getPrimaryCaret();
-
-    if (current == null || CommandStateHelper.inVisualMode(editor) && atEdgeOfGnRange(current, editor, forwards)) {
-      current = VimPlugin.getSearch().findNextSearchForGn(editor, count, forwards);
-      if (current == null) return -1;
-    }
-    else {
-      if (count > 1) {
-        current = VimPlugin.getSearch().findNextSearchForGn(editor, count - 1, forwards);
-        if (current == null) return -1;
-      }
-    }
-
+    final TextRange range = VimPlugin.getSearch().getNextSearchRange(editor, count, forwards);
+    if (range == null) return -1;
+    final int adj = VimPlugin.getVisualMotion().getSelectionAdj();
     if (!CommandStateHelper.inVisualMode(editor)) {
-      MotionGroup.moveCaret(editor, caret, gnStartOffset(current, forwards));
+      final int startOffset = forwards ? range.getStartOffset() : Math.max(range.getEndOffset() - adj, 0);
+      MotionGroup.moveCaret(editor, caret, startOffset);
       VimPlugin.getVisualMotion().enterVisualMode(editor, CommandState.SubMode.VISUAL_CHARACTER);
     }
-    return gnEndOffset(current, forwards);
-  }
-
-  private boolean atEdgeOfGnRange(@NotNull TextRange nextRange, @NotNull Editor editor, boolean forwards) {
-    int currentPosition = editor.getCaretModel().getOffset();
-    if (forwards) {
-      return nextRange.getEndOffset() - 1 == currentPosition;
-    }
-    else {
-      return nextRange.getStartOffset() == currentPosition;
-    }
-  }
-
-  private int gnEndOffset(@NotNull TextRange nextRange, boolean forwards) {
-    return forwards ? Math.max(nextRange.getEndOffset() - 1, 0) : nextRange.getStartOffset();
-  }
-
-  private int gnStartOffset(@NotNull TextRange range, boolean forwards) {
-    return forwards ? range.getStartOffset() : Math.max(range.getEndOffset() - 1, 0);
+    return forwards ? Math.max(range.getEndOffset() - adj, 0) : range.getStartOffset();
   }
 
   private int lastFTCmd = 0;

src/com/maddyhome/idea/vim/group/SearchGroup.java

@@ -648,7 +648,31 @@ public class SearchGroup {
   }
 
   @Nullable
-  public TextRange findNextSearchForGn(@NotNull Editor editor, int count, boolean forwards) {
+  public TextRange getNextSearchRange(@NotNull Editor editor, int count, boolean forwards) {
+    editor.getCaretModel().removeSecondaryCarets();
+    TextRange current = findUnderCaret(editor);
+
+    if (current == null || CommandStateHelper.inVisualMode(editor) && atEdgeOfGnRange(current, editor, forwards)) {
+      current = findNextSearchForGn(editor, count, forwards);
+    }
+    else if (count > 1) {
+      current = findNextSearchForGn(editor, count - 1, forwards);
+    }
+    return current;
+  }
+
+  private boolean atEdgeOfGnRange(@NotNull TextRange nextRange, @NotNull Editor editor, boolean forwards) {
+    int currentPosition = editor.getCaretModel().getOffset();
+    if (forwards) {
+      return nextRange.getEndOffset() - VimPlugin.getVisualMotion().getSelectionAdj() == currentPosition;
+    }
+    else {
+      return nextRange.getStartOffset() == currentPosition;
+    }
+  }
+
+  @Nullable
+  private TextRange findNextSearchForGn(@NotNull Editor editor, int count, boolean forwards) {
     if (forwards) {
       return findIt(editor, editor.getCaretModel().getOffset(), count, 1, false, true, false, true);
     } else {
@@ -656,7 +680,8 @@ public class SearchGroup {
     }
   }
 
-  public TextRange findUnderCaret(@NotNull Editor editor) {
+  @Nullable
+  private TextRange findUnderCaret(@NotNull Editor editor) {
     final TextRange backSearch = searchBackward(editor, editor.getCaretModel().getOffset() + 1, 1);
     if (backSearch == null) return null;
     return backSearch.contains(editor.getCaretModel().getOffset()) ? backSearch : null;

test/org/jetbrains/plugins/ideavim/action/motion/gn/GnNextTextObjectTest.kt

@@ -0,0 +1,77 @@
+/*
+ * IdeaVim - Vim emulator for IDEs based on the IntelliJ platform
+ * Copyright (C) 2003-2019 The IdeaVim authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+@file:Suppress("RemoveCurlyBracesFromTemplate")
+
+package org.jetbrains.plugins.ideavim.action.motion.gn
+
+import com.maddyhome.idea.vim.VimPlugin
+import com.maddyhome.idea.vim.command.CommandFlags
+import com.maddyhome.idea.vim.command.CommandState
+import com.maddyhome.idea.vim.helper.StringHelper.parseKeys
+import org.jetbrains.plugins.ideavim.VimTestCase
+import java.util.*
+import javax.swing.KeyStroke
+
+class GnNextTextObjectTest : VimTestCase() {
+  fun `test delete word`() {
+    doTestWithSearch(parseKeys("dgn"), """
+      Hello, ${c}this is a test here
+    """.trimIndent(),
+      """
+        Hello, this is a ${c} here
+      """.trimIndent())
+  }
+
+  fun `test delete second word`() {
+    doTestWithSearch(parseKeys("2dgn"), """
+      Hello, ${c}this is a test here
+      Hello, this is a test here
+    """.trimIndent(),
+      """
+        Hello, this is a test here
+        Hello, this is a ${c} here
+      """.trimIndent())
+  }
+
+  fun `test with repeat`() {
+    doTestWithSearch(parseKeys("cgnNewValue<ESC>..."), """
+      Hello, ${c}this is a test here
+      Hello, this is a test here
+      Hello, this is a test here
+      Hello, this is a test here
+      Hello, this is a test here
+    """.trimIndent(),
+      """
+      Hello, this is a NewValue here
+      Hello, this is a NewValue here
+      Hello, this is a NewValue here
+      Hello, this is a NewValu${c}e here
+      Hello, this is a test here
+      """.trimIndent())
+  }
+
+  private fun doTestWithSearch(keys: List<KeyStroke>, before: String,
+                               after: String) {
+    configureByText(before)
+    VimPlugin.getSearch().search(myFixture.editor, "test", 1, EnumSet.noneOf(CommandFlags::class.java), false)
+    typeText(keys)
+    myFixture.checkResult(after)
+    assertState(CommandState.Mode.COMMAND, CommandState.SubMode.NONE)
+  }
+}

test/org/jetbrains/plugins/ideavim/action/motion/gn/GnPreviousTextObjectTest.kt

@@ -0,0 +1,60 @@
+/*
+ * IdeaVim - Vim emulator for IDEs based on the IntelliJ platform
+ * Copyright (C) 2003-2019 The IdeaVim authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+@file:Suppress("RemoveCurlyBracesFromTemplate")
+
+package org.jetbrains.plugins.ideavim.action.motion.gn
+
+import com.maddyhome.idea.vim.VimPlugin
+import com.maddyhome.idea.vim.command.CommandFlags
+import com.maddyhome.idea.vim.command.CommandState
+import com.maddyhome.idea.vim.helper.StringHelper.parseKeys
+import org.jetbrains.plugins.ideavim.VimTestCase
+import java.util.*
+import javax.swing.KeyStroke
+
+class GnPreviousTextObjectTest : VimTestCase() {
+  fun `test delete word`() {
+    doTestWithSearch(parseKeys("dgN"), """
+      Hello, ${c}this is a test here
+    """.trimIndent(),
+      """
+        Hello, this is a ${c} here
+      """.trimIndent())
+  }
+
+  fun `test delete second word`() {
+    doTestWithSearch(parseKeys("2dgN"), """
+      Hello, this is a test here
+      Hello, this is a test ${c}here
+    """.trimIndent(),
+      """
+        Hello, this is a ${c} here
+        Hello, this is a test here
+      """.trimIndent())
+  }
+
+  private fun doTestWithSearch(keys: List<KeyStroke>, before: String,
+                               after: String) {
+    configureByText(before)
+    VimPlugin.getSearch().search(myFixture.editor, "test", 1, EnumSet.noneOf(CommandFlags::class.java), false)
+    typeText(keys)
+    myFixture.checkResult(after)
+    assertState(CommandState.Mode.COMMAND, CommandState.SubMode.NONE)
+  }
+}