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GTextEditor: Work on cut/copy/paste operations.

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This commit is contained in:
Andreas Kling 2019-03-08 14:08:15 +01:00
parent b8581b0069
commit 48d48679b0
4 changed files with 88 additions and 7 deletions
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76
LibGUI/GTextEditor.cpp
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@ -1,6 +1,7 @@
#include <LibGUI/GTextEditor.h>
#include <LibGUI/GScrollBar.h>
#include <LibGUI/GFontDatabase.h>
#include <LibGUI/GClipboard.h>
#include <SharedGraphics/Painter.h>
#include <Kernel/KeyCode.h>
#include <AK/StringBuilder.h>
@ -344,6 +345,14 @@ void GTextEditor::keydown_event(GKeyEvent& event)
return GWidget::keydown_event(event);
}
void GTextEditor::insert_at_cursor(const String& text)
{
// FIXME: This should obviously not be implemented this way.
for (int i = 0; i < text.length(); ++i) {
insert_at_cursor(text[i]);
}
}
void GTextEditor::insert_at_cursor(char ch)
{
bool at_head = m_cursor.column() == 0;
@ -449,6 +458,7 @@ void GTextEditor::set_cursor(int line, int column)
void GTextEditor::set_cursor(const GTextPosition& position)
{
ASSERT(!m_lines.is_empty());
if (m_cursor == position)
return;
auto old_cursor_line_rect = line_widget_rect(m_cursor.line());
@ -596,3 +606,69 @@ String GTextEditor::selected_text() const
return builder.to_string();
}
void GTextEditor::delete_selection()
{
if (!has_selection())
return;
auto normalized_selection_start = m_selection_start;
auto normalized_selection_end = m_cursor;
if (m_cursor < m_selection_start)
swap(normalized_selection_start, normalized_selection_end);
for (int i = normalized_selection_start.line(); i <= normalized_selection_end.line();) {
auto& line = *m_lines[i];
int selection_start_column_on_line = normalized_selection_start.line() == i ? normalized_selection_start.column() : 0;
int selection_end_column_on_line = normalized_selection_end.line() == i ? normalized_selection_end.column() : line.length();
bool whole_line_is_selected = selection_start_column_on_line == 0 && selection_end_column_on_line == line.length();
if (whole_line_is_selected) {
m_lines.remove(i);
normalized_selection_end.set_line(normalized_selection_end.line() - 1);
continue;
}
auto before_selection = String(line.characters(), line.length()).substring(0, selection_start_column_on_line);
auto after_selection = String(line.characters(), line.length()).substring(selection_end_column_on_line, line.length() - selection_end_column_on_line);
StringBuilder builder(before_selection.length() + after_selection.length());
builder.append(before_selection);
builder.append(after_selection);
line.set_text(builder.to_string());
++i;
}
if (m_lines.is_empty())
m_lines.append(make<Line>());
m_selection_start = { };
set_cursor(normalized_selection_start);
update();
}
void GTextEditor::insert_at_cursor_or_replace_selection(const String& text)
{
if (has_selection())
delete_selection();
insert_at_cursor(text);
}
void GTextEditor::cut()
{
auto selected_text = this->selected_text();
printf("Cut: \"%s\"\n", selected_text.characters());
GClipboard::the().set_data(selected_text);
delete_selection();
}
void GTextEditor::copy()
{
auto selected_text = this->selected_text();
printf("Copy: \"%s\"\n", selected_text.characters());
GClipboard::the().set_data(selected_text);
}
void GTextEditor::paste()
{
auto paste_text = GClipboard::the().data();
printf("Paste: \"%s\"\n", paste_text.characters());
insert_at_cursor_or_replace_selection(paste_text);
}