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https://github.com/ArthurSonzogni/FTXUI.git
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01ab335919
The BS key is used to delete the character on the left of the cursor. The DEL key is used to delete the character on the right of the cursor. BackSpace was already implemented. This CL implements DEL. This is related to bug: https://github.com/ArthurSonzogni/FTXUI/issues/4
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
#include "ftxui/component/input.hpp"
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#include "ftxui/screen/string.hpp"
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namespace ftxui {
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// Component implementation.
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Element Input::Render() {
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cursor_position = std::max(0, std::min<int>(content.size(), cursor_position));
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auto main_decorator = flex | size(HEIGHT, EQUAL, 1);
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bool is_focused = Focused();
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// Placeholder.
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if (content.size() == 0) {
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if (is_focused)
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return text(placeholder) | focus | dim | inverted | main_decorator;
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else
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return text(placeholder) | dim | main_decorator;
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}
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// Not focused.
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if (!is_focused)
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return text(content) | main_decorator;
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std::wstring part_before_cursor = content.substr(0,cursor_position);
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std::wstring part_at_cursor = cursor_position < (int)content.size()
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? content.substr(cursor_position, 1)
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: L" ";
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std::wstring part_after_cursor = cursor_position < (int)content.size() - 1
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? content.substr(cursor_position + 1)
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: L"";
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auto focused =
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is_focused ? focus : select;
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return
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hbox(
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text(part_before_cursor),
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text(part_at_cursor) | underlined | focused,
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text(part_after_cursor)
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) | flex | inverted | frame | main_decorator;
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}
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bool Input::OnEvent(Event event) {
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cursor_position = std::max(0, std::min<int>(content.size(), cursor_position));
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std::wstring c;
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// Backspace.
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if (event == Event::Backspace) {
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if (cursor_position == 0)
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return false;
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content.erase(cursor_position - 1, 1);
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cursor_position--;
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return true;
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}
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// Delete
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if (event == Event::Delete) {
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if (cursor_position == int(content.size()))
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return false;
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content.erase(cursor_position, 1);
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return true;
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}
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// Enter.
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if (event == Event::Return) {
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on_enter();
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return true;
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}
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if (event == Event::Custom) {
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return false;
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}
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if (event == Event::ArrowLeft && cursor_position > 0) {
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cursor_position--;
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return true;
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}
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if (event == Event::ArrowRight && cursor_position < (int)content.size()) {
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cursor_position++;
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return true;
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}
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// Content
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if (event.is_character()) {
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content.insert(cursor_position, 1, event.character());
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cursor_position++;
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return true;
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}
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return false;
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}
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} // namespace ftxui
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