Initial commit

1 files changed, 139 insertions, 0 deletions

diff --git a/src/window.cc b/src/window.cc
new file mode 100644
index 00000000..4a889c00
--- /dev/null
+++ b/src/window.cc
@@ -0,0 +1,139 @@
+#include "window.hh"
+
+#include <algorithm>
+
+namespace Kakoune
+{
+
+Window::Window(const std::shared_ptr<Buffer> buffer)
+    : m_buffer(buffer),
+      m_position(0, 0),
+      m_cursor(0, 0)
+{
+}
+
+void Window::erase()
+{
+    if (m_selections.empty())
+    {
+        BufferIterator cursor = m_buffer->iterator_at(m_cursor);
+        m_buffer->erase(cursor, cursor+1);
+    }
+
+    for (auto sel = m_selections.begin(); sel != m_selections.end(); ++sel)
+    {
+        m_buffer->erase(sel->begin, sel->end);
+        sel->end = sel->begin;
+    }
+}
+
+static LineAndColumn measure_string(const Window::String& string)
+{
+    LineAndColumn result(0, 0);
+    for (size_t i = 0; i < string.length(); ++i)
+    {
+        if (string[i] == '\n')
+        {
+            ++result.line;
+            result.column = 0;
+        }
+        else
+            ++result.column;
+    }
+    return result;
+}
+
+void Window::insert(const String& string)
+{
+    if (m_selections.empty())
+    {
+        m_buffer->insert(m_buffer->iterator_at(m_cursor), string);
+        move_cursor(measure_string(string));
+    }
+
+    for (auto sel = m_selections.begin(); sel != m_selections.end(); ++sel)
+    {
+        m_buffer->insert(sel->begin, string);
+        sel->begin += string.length();
+        sel->end += string.length();
+    }
+}
+
+void Window::append(const String& string)
+{
+    if (m_selections.empty())
+    {
+        move_cursor(LineAndColumn(0 , 1));
+        insert(string);
+    }
+
+    for (auto sel = m_selections.begin(); sel != m_selections.end(); ++sel)
+    {
+        m_buffer->insert(sel->end, string);
+    }
+}
+
+void Window::empty_selections()
+{
+    m_selections.clear();
+}
+
+void Window::select(bool append, const Selector& selector)
+{
+    if (not append or m_selections.empty())
+    {
+        empty_selections();
+        m_selections.push_back(selector(m_buffer->iterator_at(m_cursor)));
+    }
+    else
+    {
+        for (auto sel = m_selections.begin(); sel != m_selections.end(); ++sel)
+        {
+            sel->end = selector(sel->end).end;
+        }
+    }
+    m_cursor = m_buffer->line_and_column_at(m_selections.back().end);
+}
+
+void Window::move_cursor(const LineAndColumn& offset)
+{
+    m_cursor = m_buffer->clamp(LineAndColumn(m_cursor.line + offset.line,
+                                             m_cursor.column + offset.column));
+}
+
+void Window::update_display_buffer()
+{
+    m_display_buffer.clear();
+
+    SelectionList sorted_selections = m_selections;
+    std::sort(sorted_selections.begin(), sorted_selections.end(),
+              [](const Selection& lhs, const Selection& rhs) { return lhs.begin < rhs.begin; });
+
+    BufferIterator current_position = m_buffer->begin();
+
+    for (Selection& sel : sorted_selections)
+    {
+        if (current_position != sel.begin)
+        {
+            DisplayAtom atom;
+            atom.content = m_buffer->string(current_position, sel.begin);
+            m_display_buffer.append(atom);
+        }
+        if (sel.begin != sel.end)
+        {
+            DisplayAtom atom;
+            atom.content = m_buffer->string(sel.begin, sel.end);
+            atom.attribute = UNDERLINE;
+            m_display_buffer.append(atom);
+        }
+        current_position = sel.end;
+    }
+    if (current_position != m_buffer->end())
+    {
+        DisplayAtom atom;
+        atom.content = m_buffer->string(current_position, m_buffer->end());
+        m_display_buffer.append(atom);
+    }
+}
+
+}