377 lines
7.7 KiB
C++
377 lines
7.7 KiB
C++
#include <psemek/ui/edit.hpp>
|
|
|
|
#include <psemek/util/to_string.hpp>
|
|
#include <psemek/util/unicode.hpp>
|
|
|
|
#include <psemek/sdl2/cursor.hpp>
|
|
|
|
namespace psemek::ui
|
|
{
|
|
|
|
bool edit::set_text(std::string_view text, bool signal)
|
|
{
|
|
return set_text(util::from_utf8(std::string(text)), signal);
|
|
}
|
|
|
|
bool edit::set_text(std::u32string text, bool signal)
|
|
{
|
|
if (validator_ && !validator_(text))
|
|
return false;
|
|
|
|
text_ = std::move(text);
|
|
caret_ = std::min(caret_, text_.size());
|
|
on_state_changed();
|
|
if (signal)
|
|
post_text_entered();
|
|
|
|
return true;
|
|
}
|
|
|
|
void edit::set_font(font_type f)
|
|
{
|
|
if (font_ != f)
|
|
{
|
|
font_ = f;
|
|
on_state_changed();
|
|
}
|
|
}
|
|
|
|
void edit::set_halign(halignment value)
|
|
{
|
|
if (halign_ != value)
|
|
{
|
|
halign_ = value;
|
|
on_state_changed();
|
|
}
|
|
}
|
|
|
|
void edit::set_valign(valignment value)
|
|
{
|
|
if (valign_ != value)
|
|
{
|
|
valign_ = value;
|
|
on_state_changed();
|
|
}
|
|
}
|
|
|
|
bool edit::set_validator(validator_type validator)
|
|
{
|
|
if (validator && !validator(text_))
|
|
return false;
|
|
validator_ = std::move(validator);
|
|
return true;
|
|
}
|
|
|
|
edit::validator_type edit::numeric()
|
|
{
|
|
return [](std::u32string_view const str) -> bool {
|
|
auto begin = str.begin();
|
|
auto end = str.end();
|
|
if (begin != end && *begin == '-')
|
|
++begin;
|
|
|
|
return std::all_of(begin, end, [](char c){ return '0' <= c && c <= '9'; });
|
|
};
|
|
}
|
|
|
|
edit::validator_type edit::numeric_nonnegative()
|
|
{
|
|
return [](std::u32string_view const str) -> bool {
|
|
return std::all_of(str.begin(), str.end(), [](char c){ return '0' <= c && c <= '9'; });
|
|
};
|
|
}
|
|
|
|
void edit::on_text_entered(callback_type callback, bool signal)
|
|
{
|
|
on_text_entered_ = std::move(callback);
|
|
if (signal)
|
|
post_text_entered();
|
|
}
|
|
|
|
bool edit::on_event(mouse_move const & e)
|
|
{
|
|
bool const mouseover = shape_.contains(geom::cast<float>(e.position));
|
|
|
|
switch (state_)
|
|
{
|
|
case state_t::normal:
|
|
if (mouseover)
|
|
{
|
|
state_ = state_t::mouseover;
|
|
sdl2::set_cursor(sdl2::cursor_type::beam);
|
|
}
|
|
break;
|
|
case state_t::mouseover:
|
|
if (!mouseover)
|
|
{
|
|
state_ = state_t::normal;
|
|
sdl2::set_cursor(sdl2::cursor_type::arrow);
|
|
}
|
|
break;
|
|
case state_t::editing:
|
|
if (mouseover)
|
|
sdl2::set_cursor(sdl2::cursor_type::beam);
|
|
else
|
|
sdl2::set_cursor(sdl2::cursor_type::arrow);
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool edit::on_event(mouse_click const & e)
|
|
{
|
|
if (e.button == mouse_button::left && e.down)
|
|
{
|
|
switch (state_)
|
|
{
|
|
case state_t::normal:
|
|
return false;
|
|
case state_t::mouseover:
|
|
state_ = state_t::editing;
|
|
if (!in_text_input())
|
|
start_text_input();
|
|
reset_caret();
|
|
return true;
|
|
case state_t::editing:
|
|
state_ = state_t::normal;
|
|
if (in_text_input())
|
|
stop_text_input();
|
|
reset_caret();
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool edit::on_event(key_press const & e)
|
|
{
|
|
if (e.down && state_ == state_t::editing)
|
|
{
|
|
if (e.key == SDLK_LEFT)
|
|
{
|
|
if (caret_ > 0)
|
|
{
|
|
--caret_;
|
|
reset_caret();
|
|
}
|
|
}
|
|
else if (e.key == SDLK_RIGHT)
|
|
{
|
|
if (caret_ < text_.size())
|
|
{
|
|
++caret_;
|
|
reset_caret();
|
|
}
|
|
}
|
|
else if (e.key == SDLK_HOME)
|
|
{
|
|
caret_ = 0;
|
|
}
|
|
else if (e.key == SDLK_END)
|
|
{
|
|
caret_ = text_.size();
|
|
}
|
|
else if (e.key == SDLK_RETURN || e.key == SDLK_ESCAPE)
|
|
{
|
|
state_ = state_t::normal;
|
|
if (in_text_input())
|
|
stop_text_input();
|
|
reset_caret();
|
|
post_text_entered();
|
|
}
|
|
else if (e.key == SDLK_BACKSPACE)
|
|
{
|
|
if (caret_ > 0)
|
|
{
|
|
--caret_;
|
|
auto new_text = text_;
|
|
new_text.erase(new_text.begin() + caret_);
|
|
if (!set_text(std::move(new_text), false))
|
|
++caret_;
|
|
}
|
|
}
|
|
else if (e.key == SDLK_DELETE)
|
|
{
|
|
if (caret_ < text_.size())
|
|
{
|
|
auto new_text = text_;
|
|
new_text.erase(new_text.begin() + caret_);
|
|
set_text(std::move(new_text), false);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool edit::on_event(text_input const & e)
|
|
{
|
|
if (state_ == state_t::editing)
|
|
{
|
|
auto new_text = text_;
|
|
auto range = util::utf8_range(e.text);
|
|
new_text.insert(new_text.begin() + caret_, range.begin(), range.end());
|
|
if (set_text(std::move(new_text), false))
|
|
caret_ += range.size();
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void edit::reshape(geom::box<float, 2> const & bbox)
|
|
{
|
|
shape_.box = bbox;
|
|
text_box_ = bbox;
|
|
}
|
|
|
|
geom::box<float, 2> edit::size_constraints() const
|
|
{
|
|
// TODO: min x-size
|
|
static float const inf = std::numeric_limits<float>::infinity();
|
|
|
|
auto st = merged_own_style();
|
|
|
|
return {{{0.f, inf}, {1.f * st->font->size()[1] * (*st->scale), inf}}};
|
|
}
|
|
|
|
void edit::own_style_updated()
|
|
{
|
|
element::own_style_updated();
|
|
on_state_changed();
|
|
}
|
|
|
|
void edit::update(float dt)
|
|
{
|
|
if (state_ == state_t::editing)
|
|
{
|
|
caret_blink_timer_ += dt;
|
|
if (caret_blink_timer_ >= caret_blink_period_)
|
|
{
|
|
caret_blink_timer_ -= caret_blink_period_;
|
|
caret_visible_ = !caret_visible_;
|
|
}
|
|
}
|
|
}
|
|
|
|
void edit::draw(painter & p) const
|
|
{
|
|
auto st = merged_own_style();
|
|
|
|
if (!cached_state_)
|
|
{
|
|
cached_state state;
|
|
state.font = (font_ == font_type::bold) ? st->bold_font.get() : st->font.get();
|
|
|
|
shape_options options;
|
|
options.scale = *st->text_scale;
|
|
state.glyphs = state.font->shape(text_, options);
|
|
|
|
geom::box<float, 2> bbox;
|
|
for (auto const & g : state.glyphs)
|
|
bbox |= g.position;
|
|
|
|
state.size[0] = state.glyphs.empty() ? 0.f : bbox[0].length();
|
|
state.size[1] = state.font->size()[1] * (*st->text_scale);
|
|
|
|
cached_state_ = std::move(state);
|
|
}
|
|
|
|
geom::vector<float, 2> offset{0.f, 0.f};
|
|
|
|
switch (halign_)
|
|
{
|
|
case halignment::left:
|
|
offset[0] = text_box_[0].min;
|
|
break;
|
|
case halignment::center:
|
|
offset[0] = text_box_[0].center() - cached_state_->size[0] * 0.5f;
|
|
break;
|
|
case halignment::right:
|
|
offset[0] = text_box_[0].max - cached_state_->size[0];
|
|
break;
|
|
}
|
|
|
|
switch (valign_)
|
|
{
|
|
case valignment::top:
|
|
offset[1] = text_box_[1].min;
|
|
break;
|
|
case valignment::center:
|
|
offset[1] = text_box_[1].center() - cached_state_->size[1] * 0.5f;
|
|
break;
|
|
case valignment::bottom:
|
|
offset[1] = text_box_[1].max - cached_state_->size[1];
|
|
break;
|
|
}
|
|
|
|
p.begin_stencil();
|
|
p.draw_rect(text_box_, {0, 0, 0, 255});
|
|
p.commit_stencil();
|
|
|
|
if (*st->text_shadow_offset != geom::vector{0, 0} && (*st->shadow_color)[3] != 0)
|
|
{
|
|
auto shoffset = offset + geom::cast<float>(*st->text_shadow_offset);
|
|
for (auto const & g : cached_state_->glyphs)
|
|
p.draw_glyph(*cached_state_->font, g.character, g.position + shoffset, *st->shadow_color);
|
|
}
|
|
|
|
for (auto const & g : cached_state_->glyphs)
|
|
p.draw_glyph(*cached_state_->font, g.character, g.position + offset, *st->text_color);
|
|
|
|
p.end_stencil();
|
|
|
|
if (caret_visible_)
|
|
{
|
|
float x;
|
|
if (cached_state_->glyphs.empty())
|
|
x = 0.f;
|
|
else if (caret_ == 0)
|
|
x = cached_state_->glyphs.front().position[0].min;
|
|
else if (caret_ >= cached_state_->glyphs.size())
|
|
x = cached_state_->glyphs.back().position[0].max;
|
|
else
|
|
x = (cached_state_->glyphs[caret_ - 1].position[0].max + cached_state_->glyphs[caret_].position[0].min) / 2.f;
|
|
|
|
x += offset[0];
|
|
|
|
float y = offset[1];
|
|
|
|
p.draw_rect({{{x - (*st->text_scale) * 0.5f, x + (*st->text_scale) * 0.5f}, {y, y + cached_state_->size[1]}}}, *st->text_color);
|
|
}
|
|
}
|
|
|
|
void edit::set_text_shape(geom::box<float, 2> const & box)
|
|
{
|
|
text_box_ = box;
|
|
}
|
|
|
|
void edit::on_state_changed()
|
|
{
|
|
cached_state_ = std::nullopt;
|
|
post_reshape();
|
|
reset_caret();
|
|
}
|
|
|
|
void edit::reset_caret()
|
|
{
|
|
caret_visible_ = (state_ == state_t::editing);
|
|
caret_blink_timer_ = 0.f;
|
|
}
|
|
|
|
void edit::post_text_entered() const
|
|
{
|
|
if (on_text_entered_)
|
|
{
|
|
post([weak_self = weak_from_this(), cb = on_text_entered_]{
|
|
if (auto self = weak_self.lock())
|
|
cb(dynamic_cast<edit const *>(self.get())->text_);
|
|
});
|
|
}
|
|
}
|
|
|
|
}
|