From bbc49b78e8b766fc695ab90fdbe00f579882fc99 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 12 Sep 2019 16:46:07 +0300
Subject: [PATCH] Some more interfaces to support integrating Entry with other
 components

---
 source/entry.cpp | 33 +++++++++++++++++++++++++++++++++
 source/entry.h   |  7 +++++++
 2 files changed, 40 insertions(+)

diff --git a/source/entry.cpp b/source/entry.cpp
index fec2739..54c5fb7 100644
--- a/source/entry.cpp
+++ b/source/entry.cpp
@@ -64,11 +64,15 @@ void Entry::insert(unsigned pos, const string &t)
 {
 	text.insert(pos, t);
 
+	unsigned old_edit_pos = edit_pos;
 	if(edit_pos>=pos)
 		edit_pos += t.size();
 	if(selection_active && selection_pos>=pos)
 		selection_pos += t.size();
 
+	if(edit_pos!=old_edit_pos)
+		signal_edit_position_changed.emit(edit_pos);
+
 	if(multiline)
 		check_view_range();
 
@@ -79,6 +83,7 @@ void Entry::erase(unsigned pos, unsigned len)
 {
 	text.erase(pos, len);
 
+	unsigned old_edit_pos = edit_pos;
 	if(edit_pos>=pos+len)
 		edit_pos -= len;
 	else if(edit_pos>=pos)
@@ -91,8 +96,12 @@ void Entry::erase(unsigned pos, unsigned len)
 			selection_pos = pos;
 	}
 
+	if(edit_pos!=old_edit_pos)
+		signal_edit_position_changed.emit(edit_pos);
+
 	if(multiline)
 		check_view_range();
+
 	rebuild();
 }
 
@@ -109,6 +118,16 @@ bool Entry::get_selection(unsigned &start, unsigned &end) const
 	return true;
 }
 
+void Entry::translate_position(unsigned pos, unsigned &row, unsigned &col) const
+{
+	text.offset_to_coords(pos, row, col);
+}
+
+unsigned Entry::translate_position(unsigned row, unsigned col) const
+{
+	return text.coords_to_offset(row, col);
+}
+
 void Entry::set_edit_size(unsigned w, unsigned h)
 {
 	edit_width = w;
@@ -376,7 +395,12 @@ void Entry::set_edit_position(unsigned ep, bool select)
 		selection_pos = edit_pos;
 	selection_active = select;
 
+	unsigned old_edit_pos = edit_pos;
 	edit_pos = min(ep, text.size());
+
+	if(edit_pos!=old_edit_pos)
+		signal_edit_position_changed.emit(edit_pos);
+
 	if(multiline)
 		check_view_range();
 	rebuild();
@@ -418,11 +442,15 @@ void Entry::check_view_range()
 	unsigned row, col;
 	text.offset_to_coords(edit_pos, row, col);
 
+	unsigned old_first_row = first_row;
 	if(first_row>row)
 		first_row = row;
 	else if(row>=first_row+visible_rows)
 		first_row = row+1-visible_rows;
 
+	if(first_row!=old_first_row)
+		signal_scroll_position_changed.emit(first_row);
+
 	unsigned scroll = max(text.get_n_lines(), visible_rows)-visible_rows;
 	slider->set_range(0, scroll);
 	slider->set_value(scroll-first_row);
@@ -431,7 +459,12 @@ void Entry::check_view_range()
 void Entry::slider_value_changed(double value)
 {
 	if(text.get_n_lines()>visible_rows)
+	{
+		unsigned old_first_row = first_row;
 		first_row = text.get_n_lines()-visible_rows-static_cast<unsigned>(value);
+		if(first_row!=old_first_row)
+			signal_scroll_position_changed.emit(first_row);
+	}
 }
 
 
diff --git a/source/entry.h b/source/entry.h
index b6b4998..02d1f2e 100644
--- a/source/entry.h
+++ b/source/entry.h
@@ -31,6 +31,9 @@ public:
 		void multiline(bool);
 	};
 
+	sigc::signal<void, unsigned> signal_edit_position_changed;
+	sigc::signal<void, unsigned> signal_scroll_position_changed;
+
 	// Deprecated
 	sigc::signal<void> signal_enter;
 
@@ -65,7 +68,11 @@ public:
 
 	void set_edit_position(unsigned p) { set_edit_position(p, false); }
 	unsigned get_edit_position() const { return edit_pos; }
+	unsigned get_scroll_position() const { return first_row; }
+	unsigned get_visible_rows() const { return visible_rows; }
 	bool get_selection(unsigned &, unsigned &) const;
+	void translate_position(unsigned, unsigned &, unsigned &) const;
+	unsigned translate_position(unsigned, unsigned) const;
 
 	/** Sets the minimum size of the editing area, in characters and rows.  This
 	only affects autosizing. */
-- 
2.45.2