FakeVim: Select and modify paragraph object

Change-Id: Ib528fa2914bfcb17caed114d7da2d201079b0725
Reviewed-by: hjk <hjk121@nokiamail.com>

3 files changed, 558 insertions, 16 deletions

diff --git a/src/plugins/fakevim/fakevim_test.cpp b/src/plugins/fakevim/fakevim_test.cpp
index e012b04969a..cd1ed10b1f8 100644
--- a/src/plugins/fakevim/fakevim_test.cpp
+++ b/src/plugins/fakevim/fakevim_test.cpp
@@ -1573,6 +1573,432 @@ void FakeVimPlugin::test_vim_block_selection_insert()
         "a" X "bXYZc" N
         "  XYZ" N
         "deXYZf" N
+         );
+}
+
+void FakeVimPlugin::test_vim_delete_inner_paragraph()
+{
+    TestData data;
+    setup(&data);
+
+    data.setText(
+        "abc" N
+        "def" N
+        "" N
+        "" N
+        "ghi" N
+        "" N
+        "jkl" N
+    );
+
+    KEYS("dip",
+        X "" N
+        "" N
+        "ghi" N
+        "" N
+        "jkl" N
+    );
+    KEYS("dip",
+        X "ghi" N
+        "" N
+        "jkl" N
+    );
+    KEYS("2dip",
+        X "jkl" N
+    );
+}
+
+void FakeVimPlugin::test_vim_delete_a_paragraph()
+{
+    TestData data;
+    setup(&data);
+
+    data.setText(
+        "abc" N
+        "def" N
+        "" N
+        "" N
+        "ghi" N
+        "" N
+        "jkl" N
+    );
+
+    KEYS("dap",
+        X "ghi" N
+        "" N
+        "jkl" N
+    );
+    KEYS("dap",
+        X "jkl" N
+    );
+    KEYS("u",
+        X "ghi" N
+        "" N
+        "jkl" N
+    );
+
+    data.setText(
+        "abc" N
+        "" N
+        "" N
+        "def"
+    );
+    KEYS("Gdap",
+        X "abc"
+    );
+}
+
+void FakeVimPlugin::test_vim_change_inner_paragraph()
+{
+    TestData data;
+    setup(&data);
+
+    data.setText(
+        "abc" N
+        "def" N
+        "" N
+        "" N
+        "ghi" N
+        "" N
+        "jkl" N
+    );
+
+    KEYS("cipXXX<ESC>",
+        "XX" X "X" N
+        "" N
+        "" N
+        "ghi" N
+        "" N
+        "jkl" N
+    );
+    KEYS("3j" "cipYYY<ESC>",
+        "XXX" N
+        "" N
+        "" N
+        "YY" X "Y" N
+        "" N
+        "jkl" N
+    );
+}
+
+void FakeVimPlugin::test_vim_change_a_paragraph()
+{
+    TestData data;
+    setup(&data);
+
+    data.setText(
+        "abc" N
+        "def" N
+        "" N
+        "" N
+        "ghi" N
+        "" N
+        "jkl" N
+    );
+
+    KEYS("4j" "capXXX<ESC>",
+        "abc" N
+        "def" N
+        "" N
+        "" N
+        "XX" X "X" N
+        "jkl" N
+    );
+    KEYS("gg" "capYYY<ESC>",
+        "YY" X "Y" N
+        "XXX" N
+        "jkl" N
+    );
+
+    data.setText(
+        "abc" N
+        "" N
+        "" N
+        "def"
+    );
+    KEYS("GcapXXX<ESC>",
+        "abc" N
+        "XX" X "X"
+         );
+}
+
+void FakeVimPlugin::test_vim_select_inner_paragraph()
+{
+    TestData data;
+    setup(&data);
+
+    data.setText(
+        "" N
+        X "abc" N
+        "def" N
+        "" N
+        "ghi"
+    );
+    KEYS("vip" "r-",
+        "" N
+        X "---" N
+        "---" N
+        "" N
+        "ghi"
+    );
+
+    data.setText(
+        "" N
+        X "abc" N
+        "def" N
+        "" N
+        "ghi"
+    );
+    KEYS("vip" ":s/^/-<CR>",
+        "" N
+        "-abc" N
+        X "-def" N
+        "" N
+        "ghi"
+    );
+
+    data.setText(
+        "" N
+        X "abc" N
+        "def" N
+        "" N
+        "ghi"
+    );
+    KEYS("v2ip" ":s/^/-<CR>",
+        "" N
+        "-abc" N
+        "-def" N
+        X "-" N
+        "ghi"
+    );
+
+    data.setText(
+        "" N
+        X "abc" N
+        "def" N
+        "" N
+        "ghi"
+    );
+    KEYS("Vj" "ip" ":s/^/-<CR>",
+        "" N
+        "-abc" N
+        "-def" N
+        X "-" N
+        "ghi"
+    );
+
+    data.setText(
+        "" N
+        X "abc" N
+        "def" N
+        "" N
+        "ghi"
+    );
+    KEYS("vj" "ip" ":s/^/-<CR>",
+        "" N
+        "-abc" N
+        "-def" N
+        "-" N
+        "ghi"
+    );
+
+    data.setText(
+        "" N
+        X "abc" N
+        "def" N
+        "ghi" N
+        "" N
+        "jkl"
+    );
+    KEYS("vj" "ip" ":s/^/-<CR>",
+        "" N
+        "-abc" N
+        "-def" N
+        "-ghi" N
+        "" N
+        "jkl"
+    );
+
+    data.setText(
+        "" N
+        X "abc" N
+        "def" N
+        "" N
+        "ghi"
+    );
+    KEYS("vip" "r-",
+        "" N
+        X "---" N
+        "---" N
+        "" N
+        "ghi"
+    );
+
+    data.setText(
+        "abc" N
+        "" N
+        "def"
+    );
+    KEYS("G" "vip" "r-",
+        "abc" N
+        "" N
+        "---"
+    );
+
+    data.setText(
+        "" N
+        "" N
+        "ghi"
+    );
+    KEYS("vip" ":s/^/-<CR>",
+        "-" N
+        "-" N
+        "ghi"
+    );
+
+    data.setText(
+        "" N
+        "ghi"
+    );
+    KEYS("vip" "ip" ":s/^/-<CR>",
+        "-" N
+        X "-ghi"
+    );
+
+    data.setText(
+        "abc" N
+        "" N
+        ""
+    );
+    KEYS("j" "vip" ":s/^/-<CR>",
+        "abc" N
+        "-" N
+        "-"
+    );
+
+    // Don't move anchor if it's on different line.
+    data.setText(
+        "" N
+        "abc" N
+        X "def" N
+        "ghi" N
+        "" N
+        "jkl"
+    );
+    KEYS("vj" "ip" ":s/^/-<CR>",
+        "" N
+        "abc" N
+        "-def" N
+        "-ghi" N
+        X "-" N
+        "jkl"
+    );
+
+    // Don't change selection mode if anchor is on different line.
+    data.setText(
+        "" N
+        "abc" N
+        X "def" N
+        "ghi" N
+        "" N
+        "jkl"
+    );
+    KEYS("vj" "2ip" "r-",
+        "" N
+        "abc" N
+        X "---" N
+        "---" N
+        "" N
+        "-kl"
+    );
+    KEYS("gv" ":s/^/X<CR>",
+        "" N
+        "abc" N
+        "X---" N
+        "X---" N
+        "X" N
+        X "X-kl"
+    );
+
+    data.setText(
+        "" N
+        "abc" N
+        X "def" N
+        "ghi" N
+        "" N
+        "jkl"
+    );
+    KEYS("<C-V>j" "2ip" "r-",
+        "" N
+        "abc" N
+        X "-ef" N
+        "-hi" N
+        "" N
+        "-kl"
+    );
+    KEYS("gv" "IX<ESC>",
+        "" N
+        "abc" N
+        "X-ef" N
+        "X-hi" N
+        "X" N
+        "X-kl"
+    );
+}
+
+void FakeVimPlugin::test_vim_select_a_paragraph()
+{
+    TestData data;
+    setup(&data);
+
+    data.setText(
+        "abc" N
+        "def" N
+        "" N
+        "ghi"
+    );
+    KEYS("vap" ":s/^/-<CR>",
+        "-abc" N
+        "-def" N
+        "-" N
+        "ghi"
+    );
+
+    data.setText(
+        "" N
+        "abc" N
+        "def" N
+        "" N
+        "ghi"
+    );
+    KEYS("vap" ":s/^/-<CR>",
+        "-" N
+        "-abc" N
+        "-def" N
+        "" N
+        "ghi"
+    );
+
+    data.setText(
+        "abc" N
+        "def" N
+        ""
+    );
+    KEYS("j" "vap" ":s/^/-<CR>",
+        "-abc" N
+        "-def" N
+        "-"
+    );
+
+    data.setText(
+        "" N
+        "abc" N
+        "def"
+    );
+    KEYS("j" "vap" ":s/^/-<CR>",
+        "-" N
+        "-abc" N
+        "-def"
     );
 }
 
diff --git a/src/plugins/fakevim/fakevimhandler.cpp b/src/plugins/fakevim/fakevimhandler.cpp
index 7376a2166cc..ec00465840b 100644
--- a/src/plugins/fakevim/fakevimhandler.cpp
+++ b/src/plugins/fakevim/fakevimhandler.cpp
@@ -1776,6 +1776,7 @@ public:
     int lineNumber(const QTextBlock &block) const;
 
     int columnAt(int pos) const;
+    int blockNumberAt(int pos) const;
     QTextBlock blockAt(int pos) const;
     QTextBlock nextLine(const QTextBlock &block) const; // following line (respects wrapped parts)
     QTextBlock previousLine(const QTextBlock &block) const; // previous line (respects wrapped parts)
@@ -1916,8 +1917,9 @@ public:
     QTextCursor m_cursor;
     bool m_cursorNeedsUpdate;
 
-    bool moveToPreviousParagraph(int count) { return moveToNextParagraph(-count); }
-    bool moveToNextParagraph(int count);
+    bool moveToPreviousParagraph(int count = 1) { return moveToNextParagraph(-count); }
+    bool moveToNextParagraph(int count = 1);
+    void moveToParagraphStartOrEnd(int direction = 1);
 
     bool handleFfTt(const QString &key, bool repeats = false);
 
@@ -3197,7 +3199,6 @@ bool FakeVimHandler::Private::moveToNextParagraph(int count)
 {
     const bool forward = count > 0;
     int repeat = forward ? count : -count;
-    int pos = position();
     QTextBlock block = this->block();
 
     if (block.isValid() && block.length() == 1)
@@ -3209,23 +3210,39 @@ bool FakeVimHandler::Private::moveToNextParagraph(int count)
                 break;
             while (block.isValid() && block.length() == 1)
                 block = forward ? block.next() : block.previous();
+            if (!block.isValid())
+                break;
         }
     }
 
-    if (repeat == 0)
-        setPosition(block.position());
-    else if (repeat == 1)
-        setPosition(forward ? lastPositionInDocument() : 0);
-    else
+    if (!block.isValid())
+        --repeat;
+
+    if (repeat > 0)
         return false;
 
-    recordJump(pos);
-    setTargetColumn();
-    g.movetype = MoveExclusive;
+    if (block.isValid())
+        setPosition(block.position());
+    else
+        setPosition(forward ? lastPositionInDocument() : 0);
 
     return true;
 }
 
+void FakeVimHandler::Private::moveToParagraphStartOrEnd(int direction)
+{
+    bool emptyLine = atEmptyLine();
+    int oldPos = -1;
+
+    while (atEmptyLine() == emptyLine && oldPos != position()) {
+        oldPos = position();
+        moveDown(direction);
+    }
+
+    if (oldPos != position())
+        moveUp(direction);
+}
+
 void FakeVimHandler::Private::moveToEndOfLine()
 {
     // Additionally select (in visual mode) or apply current command on hidden lines following
@@ -3836,10 +3853,16 @@ bool FakeVimHandler::Private::handleMovement(const Input &input)
         moveRight(qMin(column, rightDist() - 1));
         m_targetColumn = column;
         m_visualTargetColumn = column;
-    } else if (input.is('}')) {
-        handled = moveToNextParagraph(count);
-    } else if (input.is('{')) {
-        handled = moveToPreviousParagraph(count);
+    } else if (input.is('{') || input.is('}')) {
+        const int oldPosition = position();
+        handled = input.is('}')
+            ? moveToNextParagraph(count)
+            : moveToPreviousParagraph(count);
+        if (handled) {
+            recordJump(oldPosition);
+            setTargetColumn();
+            g.movetype = MoveExclusive;
+        }
     } else if (input.isReturn()) {
         moveToStartOfLine();
         moveDown();
@@ -7333,6 +7356,11 @@ int FakeVimHandler::Private::columnAt(int pos) const
     return pos - blockAt(pos).position();
 }
 
+int FakeVimHandler::Private::blockNumberAt(int pos) const
+{
+    return blockAt(pos).blockNumber();
+}
+
 QTextBlock FakeVimHandler::Private::blockAt(int pos) const
 {
     return document()->findBlock(pos);
@@ -8044,7 +8072,81 @@ void FakeVimHandler::Private::selectSentenceTextObject(bool inner)
 
 void FakeVimHandler::Private::selectParagraphTextObject(bool inner)
 {
-    Q_UNUSED(inner);
+    const QTextCursor oldCursor = m_cursor;
+    const VisualMode oldVisualMode = g.visualMode;
+
+    const int anchorBlock = blockNumberAt(anchor());
+    const int positionBlock = blockNumberAt(position());
+    const bool setupAnchor = anchorBlock == positionBlock;
+    int repeat = count();
+
+    // If anchor and position are in the same block,
+    // start line selection at beginning of current paragraph.
+    if (setupAnchor) {
+        moveToParagraphStartOrEnd(-1);
+        setAnchor();
+
+        if (!isVisualLineMode() && isVisualMode())
+            toggleVisualMode(VisualLineMode);
+    }
+
+    const bool forward = anchor() <= position();
+    const int d = forward ? 1 : -1;
+
+    bool startsAtParagraph = !atEmptyLine(position());
+
+    moveToParagraphStartOrEnd(d);
+
+    // If selection already changed, decreate count.
+    if ((setupAnchor && g.submode != NoSubMode)
+        || oldVisualMode != g.visualMode
+        || m_cursor != oldCursor)
+    {
+        --repeat;
+        if (!inner) {
+            moveDown(d);
+            moveToParagraphStartOrEnd(d);
+            startsAtParagraph = !startsAtParagraph;
+        }
+    }
+
+    if (repeat > 0) {
+        bool isCountEven = repeat % 2 == 0;
+        bool endsOnParagraph =
+                inner ? isCountEven == startsAtParagraph : startsAtParagraph;
+
+        if (inner) {
+            repeat = repeat / 2;
+            if (!isCountEven || endsOnParagraph)
+                ++repeat;
+        } else {
+            if (endsOnParagraph)
+                ++repeat;
+        }
+
+        if (!moveToNextParagraph(d * repeat)) {
+            m_cursor = oldCursor;
+            g.visualMode = oldVisualMode;
+            return;
+        }
+
+        if (endsOnParagraph && atEmptyLine())
+            moveUp(d);
+        else
+            moveToParagraphStartOrEnd(d);
+    }
+
+    if (!inner && setupAnchor && !atEmptyLine() && !atEmptyLine(anchor())) {
+        // If position cannot select empty lines, try to select them with anchor.
+        setAnchorAndPosition(position(), anchor());
+        moveToNextParagraph(-d);
+        moveToParagraphStartOrEnd(-d);
+        setAnchorAndPosition(position(), anchor());
+    }
+
+    recordJump(oldCursor.position());
+    setTargetColumn();
+    g.movetype = MoveLineWise;
 }
 
 bool FakeVimHandler::Private::selectBlockTextObject(bool inner,
diff --git a/src/plugins/fakevim/fakevimplugin.h b/src/plugins/fakevim/fakevimplugin.h
index b8cd0d246a2..620cf6b7d0a 100644
--- a/src/plugins/fakevim/fakevimplugin.h
+++ b/src/plugins/fakevim/fakevimplugin.h
@@ -61,23 +61,37 @@ private:
 #ifdef WITH_TESTS
 private slots:
     void cleanup();
+
     void test_vim_movement();
+
     void test_vim_target_column_normal();
     void test_vim_target_column_visual_char();
     void test_vim_target_column_visual_block();
     void test_vim_target_column_visual_line();
     void test_vim_target_column_insert();
     void test_vim_target_column_replace();
+
     void test_vim_insert();
     void test_vim_fFtT();
     void test_vim_transform_numbers();
     void test_vim_delete();
+
     void test_vim_delete_inner_word();
     void test_vim_delete_a_word();
     void test_vim_change_a_word();
+
     void test_vim_change_replace();
+
     void test_vim_block_selection();
     void test_vim_block_selection_insert();
+
+    void test_vim_delete_inner_paragraph();
+    void test_vim_delete_a_paragraph();
+    void test_vim_change_inner_paragraph();
+    void test_vim_change_a_paragraph();
+    void test_vim_select_inner_paragraph();
+    void test_vim_select_a_paragraph();
+
     void test_vim_repeat();
     void test_vim_search();
     void test_vim_indent();