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Entry: implement moving care by word with ctrl+arrow keys

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dec05eba
2025-08-06 14:54:25 +02:00
parent cf282bc225
commit ff00be30df
2 changed files with 57 additions and 19 deletions
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6
include/gui/Entry.hpp
View File

@@ -19,6 +19,11 @@ namespace gsr {
class Entry : public Widget {
public:
enum class Direction {
LEFT,
RIGHT
};
Entry(mgl::Font *font, const char *text, float max_width);
Entry(const Entry&) = delete;
Entry& operator=(const Entry&) = delete;
@@ -40,6 +45,7 @@ namespace gsr {
std::function<void(const std::string &text)> on_changed;
private:
void move_caret_word(Direction direction, size_t max_codepoints);
EntryValidateHandlerResult set_text_internal(std::string str);
void draw_caret(mgl::Window &window, mgl::vec2f draw_pos, mgl::vec2f caret_size);
void draw_caret_selection(mgl::Window &window, mgl::vec2f draw_pos, mgl::vec2f caret_size);

70
src/gui/Entry.cpp
View File

@@ -6,6 +6,7 @@
#include <mglpp/system/FloatRect.hpp>
#include <mglpp/system/Utf8.hpp>
#include <optional>
#include <string.h>
namespace gsr {
static const float padding_top_scale = 0.004629f;
@@ -100,31 +101,21 @@ namespace gsr {
caret.offset_x = text.find_character_pos(caret.utf8_index).x - this->text.get_position().x;
show_selection = true;
} else if(event.key.code == mgl::Keyboard::Left && caret.byte_index > 0) {
if(!selecting_with_keyboard && show_selection) {
} else if(event.key.code == mgl::Keyboard::Left) {
if(!selecting_with_keyboard && show_selection)
show_selection = false;
} else {
caret.byte_index = mgl::utf8_get_start_of_codepoint((const unsigned char*)text.get_string().data(), text.get_string().size(), caret.byte_index - 1);
caret.utf8_index -= 1;
// TODO: Move left by one character instead of calculating every character to caret index
caret.offset_x = text.find_character_pos(caret.utf8_index).x - this->text.get_position().x;
}
else
move_caret_word(Direction::LEFT, event.key.control ? 999999 : 1);
if(!selecting_with_keyboard) {
selection_start_caret = caret;
show_selection = false;
}
} else if(event.key.code == mgl::Keyboard::Right) {
if(!selecting_with_keyboard && show_selection) {
if(!selecting_with_keyboard && show_selection)
show_selection = false;
} else {
const int caret_byte_index_before = caret.byte_index;
caret.byte_index = mgl::utf8_index_to_byte_index((const unsigned char*)text.get_string().data(), text.get_string().size(), caret.utf8_index + 1);
if(caret.byte_index != caret_byte_index_before)
caret.utf8_index += 1;
// TODO: Move right by one character instead of calculating every character to caret index
caret.offset_x = text.find_character_pos(caret.utf8_index).x - this->text.get_position().x;
}
else
move_caret_word(Direction::RIGHT, event.key.control ? 999999 : 1);
if(!selecting_with_keyboard) {
selection_start_caret = caret;
@@ -254,11 +245,16 @@ namespace gsr {
}
void Entry::draw_caret_selection(mgl::Window &window, mgl::vec2f draw_pos, mgl::vec2f caret_size) {
if(selection_start_caret.byte_index == caret.byte_index)
return;
const int padding_top = padding_top_scale * get_theme().window_height;
const int padding_left = padding_left_scale * get_theme().window_height;
const int caret_width = std::max(1.0f, caret_width_scale * get_theme().window_height);
const int offset = caret.byte_index < selection_start_caret.byte_index ? caret_width : 0;
mgl::Rectangle caret_selection_rect(mgl::vec2f(std::abs(selection_start_caret.offset_x - caret.offset_x), caret_size.y).floor());
caret_selection_rect.set_position((draw_pos + mgl::vec2f(padding_left + std::min(caret.offset_x, selection_start_caret.offset_x) - text_overflow, padding_top)).floor());
mgl::Rectangle caret_selection_rect(mgl::vec2f(std::abs(selection_start_caret.offset_x - caret.offset_x) - offset, caret_size.y).floor());
caret_selection_rect.set_position((draw_pos + mgl::vec2f(padding_left + std::min(caret.offset_x, selection_start_caret.offset_x) - text_overflow + offset, padding_top)).floor());
mgl::Color caret_select_color = get_color_theme().tint_color;
caret_select_color.a = 100;
caret_selection_rect.set_color(caret_select_color);
@@ -274,6 +270,42 @@ namespace gsr {
return { max_width, text.get_bounds().size.y + padding_top + padding_bottom };
}
void Entry::move_caret_word(Direction direction, size_t max_codepoints) {
const int dir_step = direction == Direction::LEFT ? -1 : 1;
const int num_delimiter_chars = 7;
const char delimiter_chars[num_delimiter_chars + 1] = " \t\n/.,;";
const unsigned char *text_str = (const unsigned char*)text.get_string().data();
int num_non_delimiter_chars_found = 0;
for(size_t i = 0; i < max_codepoints; ++i) {
const int caret_byte_index_before = caret.byte_index;
caret.byte_index = mgl::utf8_index_to_byte_index(text_str, text.get_string().size(), std::max(0, caret.utf8_index + dir_step));
if(caret.byte_index == caret_byte_index_before)
break;
const size_t codepoint_start = std::min(caret_byte_index_before, caret.byte_index);
const size_t codepoint_end = std::max(caret_byte_index_before, caret.byte_index);
uint32_t decoded_codepoint = ' ';
size_t codepoint_length = 1;
mgl::utf8_decode(text_str + codepoint_start, codepoint_end - codepoint_start, &decoded_codepoint, &codepoint_length);
const bool is_delimiter_char = !!memchr(delimiter_chars, decoded_codepoint, num_delimiter_chars);
if(is_delimiter_char) {
if(num_non_delimiter_chars_found > 0) {
caret.byte_index = caret_byte_index_before;
break;
}
} else {
++num_non_delimiter_chars_found;
}
caret.utf8_index += dir_step;
}
// TODO: Move right by one character instead of calculating every character to caret index
caret.offset_x = text.find_character_pos(caret.utf8_index).x - this->text.get_position().x;
}
EntryValidateHandlerResult Entry::set_text(std::string str) {
EntryValidateHandlerResult validate_result = set_text_internal(std::move(str));
if(validate_result == EntryValidateHandlerResult::ALLOW) {