From fccfc76e8935a3ce0cd89f6c03d2aae13b8af077 Mon Sep 17 00:00:00 2001
From: Delapouite <delapouite@gmail.com>
Date: Tue, 13 Feb 2018 14:35:10 +0100
Subject: [PATCH] Add trim_selections primitive

---
 doc/pages/keys.asciidoc           |  3 +++
 src/normal.cc                     | 18 ++++++++++++++++++
 test/normal/trim/cmd              |  1 +
 test/normal/trim/in               |  3 +++
 test/normal/trim/out              |  3 +++
 test/normal/trim/table/cmd        |  1 +
 test/normal/trim/table/in         |  4 ++++
 test/normal/trim/table/selections |  1 +
 8 files changed, 34 insertions(+)
 create mode 100644 test/normal/trim/cmd
 create mode 100644 test/normal/trim/in
 create mode 100644 test/normal/trim/out
 create mode 100644 test/normal/trim/table/cmd
 create mode 100644 test/normal/trim/table/in
 create mode 100644 test/normal/trim/table/selections

diff --git a/doc/pages/keys.asciidoc b/doc/pages/keys.asciidoc
index e03eae39..e61160e7 100644
--- a/doc/pages/keys.asciidoc
+++ b/doc/pages/keys.asciidoc
@@ -351,6 +351,9 @@ is a sequence of non whitespace characters
     convert spaces to tabs in current selections, uses the buffer tabstop
     option or the count parameter for tabstop
 
+*_*::
+    trim selections
+
 *<a-">*::
     rotate selections content, if specified, the count groups selections,
     so the following command
diff --git a/src/normal.cc b/src/normal.cc
index 1019ef46..0e00a978 100644
--- a/src/normal.cc
+++ b/src/normal.cc
@@ -1618,6 +1618,22 @@ void spaces_to_tabs(Context& context, NormalParams params)
         SelectionList{ buffer, std::move(spaces) }.insert("\t"_str, InsertMode::Replace);
 }
 
+void trim_selections(Context& context, NormalParams)
+{
+    auto& buffer = context.buffer();
+    for (auto& sel : context.selections())
+    {
+        auto beg = buffer.iterator_at(sel.min());
+        auto end = buffer.iterator_at(sel.max());
+        while (beg != end and is_blank(*beg))
+            ++beg;
+        while (beg != end and is_blank(*end))
+            --end;
+        sel.min() = beg.coord();
+        sel.max() = end.coord();
+    }
+}
+
 SelectionList read_selections_from_register(char reg, Context& context)
 {
     if (not is_basic_alpha(reg) and reg != '^')
@@ -2166,6 +2182,8 @@ static const HashMap<Key, NormalCmd, MemoryDomain::Undefined, KeymapBackend> key
     { {'@'}, {"convert tabs to spaces in selections", tabs_to_spaces} },
     { {alt('@')}, {"convert spaces to tabs in selections", spaces_to_tabs} },
 
+    { {'_'}, {"trim selections", trim_selections} },
+
     { {'C'}, {"copy selection on next lines", copy_selections_on_next_lines<Forward>} },
     { {alt('C')}, {"copy selection on previous lines", copy_selections_on_next_lines<Backward>} },
 
diff --git a/test/normal/trim/cmd b/test/normal/trim/cmd
new file mode 100644
index 00000000..d7c8655d
--- /dev/null
+++ b/test/normal/trim/cmd
@@ -0,0 +1 @@
+%<a-s>_<a-">
diff --git a/test/normal/trim/in b/test/normal/trim/in
new file mode 100644
index 00000000..1310992b
--- /dev/null
+++ b/test/normal/trim/in
@@ -0,0 +1,3 @@
+line 1
+  line 2
+    line 3
diff --git a/test/normal/trim/out b/test/normal/trim/out
new file mode 100644
index 00000000..0be30260
--- /dev/null
+++ b/test/normal/trim/out
@@ -0,0 +1,3 @@
+line 3
+  line 1
+    line 2
diff --git a/test/normal/trim/table/cmd b/test/normal/trim/table/cmd
new file mode 100644
index 00000000..31354ec1
--- /dev/null
+++ b/test/normal/trim/table/cmd
@@ -0,0 +1 @@
+_
diff --git a/test/normal/trim/table/in b/test/normal/trim/table/in
new file mode 100644
index 00000000..78114048
--- /dev/null
+++ b/test/normal/trim/table/in
@@ -0,0 +1,4 @@
+|       |       |        |                |
+|:------|------:|:------:|----------------|
+|%(foo )|%( bar)|%( qux )|%( pop )%( hip )|
+%(   kakoune   )
diff --git a/test/normal/trim/table/selections b/test/normal/trim/table/selections
new file mode 100644
index 00000000..ed988a11
--- /dev/null
+++ b/test/normal/trim/table/selections
@@ -0,0 +1 @@
+foo:bar:qux:pop:hip:kakoune