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Window: refactor DisplayBuffer generation

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This commit is contained in:
Maxime Coste 2011-09-28 20:54:11 +00:00
parent 7746c78ccc
commit ba2800ddac
3 changed files with 112 additions and 36 deletions
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13
src/display_buffer.hh
View File

@ -4,6 +4,8 @@
#include <string>
#include <vector>
#include "buffer.hh"
namespace Kakoune
{
@ -34,12 +36,18 @@ enum class Color
struct DisplayAtom
{
std::string content;
BufferIterator begin;
BufferIterator end;
Color fg_color;
Color bg_color;
Attribute attribute;
DisplayAtom()
: fg_color(Color::Default),
DisplayAtom(BufferIterator begin, BufferIterator end,
const std::string& content)
: content(content),
begin(begin),
end(end),
fg_color(Color::Default),
bg_color(Color::Default),
attribute(Attributes::Normal)
{}
@ -56,6 +64,7 @@ public:
void clear() { m_atoms.clear(); }
void append(const DisplayAtom& atom) { m_atoms.push_back(atom); }
iterator insert(iterator where, const DisplayAtom& atom) { return m_atoms.insert(where, atom); }
iterator begin() { return m_atoms.begin(); }
iterator end() { return m_atoms.end(); }

120
src/window.cc
View File

@ -33,6 +33,90 @@ private:
Buffer& m_buffer;
};
class HighlightSelections
{
public:
HighlightSelections(Window& window)
: m_window(window)
{
}
void operator()(DisplayBuffer& display_buffer)
{
SelectionList sorted_selections = m_window.m_selections;
std::sort(sorted_selections.begin(), sorted_selections.end(),
[](const Selection& lhs, const Selection& rhs) { return lhs.begin() < rhs.begin(); });
auto atom_it = display_buffer.begin();
auto sel_it = sorted_selections.begin();
while (atom_it != display_buffer.end()
and sel_it != sorted_selections.end())
{
Selection& sel = *sel_it;
DisplayAtom& atom = *atom_it;
// [###------]
if (atom.begin >= sel.begin() and atom.begin < sel.end() and atom.end > sel.end())
{
size_t length = sel.end() - atom.begin;
DisplayAtom selected(atom.begin, sel.end(),
atom.content.substr(0, length));
selected.attribute = Attributes::Underline;
atom.content = atom.content.substr(length);
atom.begin = sel.end();
atom_it = display_buffer.insert(atom_it, selected) + 1;
++sel_it;
}
// [---###---]
else if (atom.begin < sel.begin() and atom.end > sel.end())
{
size_t prefix_length = sel.begin() - atom.begin;
DisplayAtom prefix(atom.begin, sel.begin(),
atom.content.substr(0, prefix_length));
size_t sel_length = sel.end() - sel.begin();
DisplayAtom selected(sel.begin(), sel.end(),
atom.content.substr(prefix_length, sel_length));
selected.attribute = Attributes::Underline;
atom.content = atom.content.substr(prefix_length + sel_length);
atom_it = display_buffer.insert(atom_it, selected);
atom_it = display_buffer.insert(atom_it, prefix);
atom_it += 2;
++sel_it;
}
// [------###]
else if (atom.begin < sel.begin() and atom.end > sel.begin())
{
size_t length = sel.end() - atom.begin;
DisplayAtom prefix(atom.begin, sel.end(),
atom.content.substr(0, length));
atom.content = atom.content.substr(length);
atom.begin = sel.end();
atom.attribute = Attributes::Underline;
atom_it = display_buffer.insert(atom_it, prefix) + 2;
}
// [#########]
else if (atom.begin >= sel.begin() and atom.end <= sel.end())
{
atom.attribute = Attributes::Underline;
++atom_it;
}
// [---------]
else if (atom.begin >= sel.end())
++sel_it;
// [---------]
else if (atom.end <= sel.begin())
++atom_it;
else
assert(false);
}
}
private:
const Window& m_window;
};
Window::Window(Buffer& buffer)
: m_buffer(buffer),
m_position(0, 0),
@ -41,6 +125,7 @@ Window::Window(Buffer& buffer)
m_current_inserter(nullptr)
{
m_selections.push_back(Selection(buffer.begin(), buffer.begin()));
m_filters.push_back(HighlightSelections(*this));
}
void Window::check_invariant() const
@ -210,36 +295,13 @@ void Window::update_display_buffer()
{
m_display_buffer.clear();
SelectionList sorted_selections = m_selections;
BufferIterator begin = m_buffer.iterator_at(m_position);
BufferIterator end = m_buffer.iterator_at(m_position +
BufferCoord(m_dimensions.line, m_dimensions.column+1));
m_display_buffer.append(DisplayAtom(begin, end, m_buffer.string(begin, end)));
std::sort(sorted_selections.begin(), sorted_selections.end(),
[](const Selection& lhs, const Selection& rhs) { return lhs.begin() < rhs.begin(); });
BufferIterator current_position = m_buffer.iterator_at(m_position);
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);
}
for (auto& filter : m_filters)
filter(m_display_buffer);
}
void Window::set_dimensions(const WindowCoord& dimensions)

5
src/window.hh
View File

@ -102,12 +102,17 @@ private:
friend class IncrementalInserter;
IncrementalInserter* m_current_inserter;
friend class HighlightSelections;
SelectMode m_select_mode;
Buffer& m_buffer;
BufferCoord m_position;
WindowCoord m_dimensions;
SelectionList m_selections;
DisplayBuffer m_display_buffer;
typedef std::vector<std::function<void (DisplayBuffer&)>> FilterList;
FilterList m_filters;
};
class IncrementalInserter