From 0eaf39b72513cca363dd12a39d943a363f3a5280 Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Tue, 21 Aug 2012 20:52:49 +0200
Subject: [PATCH] Add Buffer::iterator_at_line{begin,end}(size_t line)
 overloads

---
 src/buffer.cc | 12 ++++++++++++
 src/buffer.hh |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/src/buffer.cc b/src/buffer.cc
index 6bf82020..aeff8400 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -97,6 +97,11 @@ BufferIterator Buffer::iterator_at_line_begin(const BufferIterator& iterator) co
     return BufferIterator(*this, { iterator.line(), 0 });
 }
 
+BufferIterator Buffer::iterator_at_line_begin(size_t line) const
+{
+    return BufferIterator(*this, clamp({ (int)line, 0 }));
+}
+
 BufferIterator Buffer::iterator_at_line_end(const BufferIterator& iterator) const
 {
     BufferPos line = iterator.line();
@@ -104,6 +109,13 @@ BufferIterator Buffer::iterator_at_line_end(const BufferIterator& iterator) cons
     return ++BufferIterator(*this, { line, line_length(line) - 1 });
 }
 
+BufferIterator Buffer::iterator_at_line_end(size_t line) const
+{
+    line = std::min(line, (size_t)line_count()-1);
+    assert(line_length(line) > 0);
+    return ++BufferIterator(*this, { (int)line, line_length(line) - 1 });
+}
+
 BufferIterator Buffer::begin() const
 {
     return BufferIterator(*this, { 0, 0 });
diff --git a/src/buffer.hh b/src/buffer.hh
index 0c57f851..83bdcf22 100644
--- a/src/buffer.hh
+++ b/src/buffer.hh
@@ -161,11 +161,15 @@ public:
     // returns an iterator pointing to the first character of the line
     // iterator is on
     BufferIterator iterator_at_line_begin(const BufferIterator& iterator) const;
+    // the same but taking a line number instead of an iterator
+    BufferIterator iterator_at_line_begin(size_t line) const;
 
     // returns an iterator pointing to the character after the last of the
     // line iterator is on (which is the first of the next line if iterator is
     // not on the last one)
     BufferIterator iterator_at_line_end(const BufferIterator& iterator) const;
+    // the same but taking a line number instead of an iterator
+    BufferIterator iterator_at_line_end(size_t line) const;
 
     const String& line_content(size_t l) const { return m_lines[l].content; }