From 8a829f00f36517625d57b002e3a479755c0eae6d Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 11 Sep 2019 18:53:54 +0300
Subject: [PATCH] Add some editing functions to Entry

---
 source/entry.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++++++-
 source/entry.h   |  6 +++++
 2 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/source/entry.cpp b/source/entry.cpp
index af6fcc6..70321dc 100644
--- a/source/entry.cpp
+++ b/source/entry.cpp
@@ -57,7 +57,17 @@ void Entry::autosize_special(const Part &part, Geometry &ageom) const
 void Entry::set_text(const string &t)
 {
 	text = t;
-	edit_pos = text.size();
+	set_edit_position(text.size());
+}
+
+void Entry::insert(unsigned pos, const string &t)
+{
+	text.insert(pos, t);
+
+	if(edit_pos>=pos)
+		edit_pos += t.size();
+	if(selection_active && selection_pos>=pos)
+		selection_pos += t.size();
 
 	if(multiline)
 		check_view_range();
@@ -65,6 +75,52 @@ void Entry::set_text(const string &t)
 	rebuild();
 }
 
+void Entry::erase(unsigned pos, unsigned len)
+{
+	text.erase(pos, len);
+
+	if(edit_pos>=pos+len)
+		edit_pos -= len;
+	else if(edit_pos>=pos)
+		edit_pos = pos;
+	if(selection_active)
+	{
+		if(selection_pos>=pos+len)
+			selection_pos -= len;
+		else if(selection_pos>=pos)
+			selection_pos = pos;
+	}
+
+	if(multiline)
+		check_view_range();
+
+	rebuild();
+}
+
+void Entry::set_edit_position(unsigned pos)
+{
+	edit_pos = min(pos, text.size());
+	selection_active = false;
+
+	if(multiline)
+		check_view_range();
+
+	rebuild();
+}
+
+bool Entry::get_selection(unsigned &start, unsigned &end) const
+{
+	if(!selection_active)
+		return false;
+
+	start = selection_pos;
+	end = edit_pos;
+	if(start>end)
+		swap(start, end);
+
+	return true;
+}
+
 void Entry::set_edit_size(unsigned w, unsigned h)
 {
 	edit_width = w;
diff --git a/source/entry.h b/source/entry.h
index a5b03fc..a350ea8 100644
--- a/source/entry.h
+++ b/source/entry.h
@@ -59,8 +59,14 @@ private:
 
 public:
 	void set_text(const std::string &);
+	void insert(unsigned, const std::string &);
+	void erase(unsigned, unsigned);
 	const std::string &get_text() const { return text.get(); }
 
+	void set_edit_position(unsigned);
+	unsigned get_edit_position() const { return edit_pos; }
+	bool get_selection(unsigned &, unsigned &) const;
+
 	/** Sets the minimum size of the editing area, in characters and rows.  This
 	only affects autosizing. */
 	void set_edit_size(unsigned w, unsigned h);
-- 
2.43.0