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Feature: Selection

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Add support for selection content in the dom.
This commit is contained in:
Clément Roblot
2024-12-27 15:45:13 +07:00
committed by GitHub
parent 751c8fab26
commit 6fafa2dfed
25 changed files with 1001 additions and 31 deletions
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47
src/ftxui/dom/text.cpp
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@@ -3,8 +3,9 @@
// the LICENSE file.
#include <algorithm> // for min
#include <memory> // for make_shared
#include <string> // for string, wstring
#include <utility> // for move
#include <sstream>
#include <string> // for string, wstring
#include <utility> // for move
#include "ftxui/dom/deprecated.hpp" // for text, vtext
#include "ftxui/dom/elements.hpp" // for Element, text, vtext
@@ -26,28 +27,68 @@ class Text : public Node {
void ComputeRequirement() override {
requirement_.min_x = string_width(text_);
requirement_.min_y = 1;
has_selection = false;
}
void Select(Selection& selection) override {
if (Box::Intersection(selection.GetBox(), box_).IsEmpty()) {
return;
}
Selection selection_saturated = selection.SaturateHorizontal(box_);
has_selection = true;
selection_start_ = selection_saturated.GetBox().x_min;
selection_end_ = selection_saturated.GetBox().x_max;
std::stringstream ss;
int x = box_.x_min;
for (const auto& cell : Utf8ToGlyphs(text_)) {
if (cell == "\n") {
continue;
}
if (selection_start_ <= x && x <= selection_end_) {
ss << cell;
}
x++;
}
selection.AddPart(ss.str(), box_.y_min, selection_start_, selection_end_);
}
void Render(Screen& screen) override {
int x = box_.x_min;
const int y = box_.y_min;
if (y > box_.y_max) {
return;
}
for (const auto& cell : Utf8ToGlyphs(text_)) {
if (x > box_.x_max) {
return;
break;
}
if (cell == "\n") {
continue;
}
screen.PixelAt(x, y).character = cell;
if (has_selection) {
auto selectionTransform = screen.GetSelectionStyle();
if ((x >= selection_start_) && (x <= selection_end_)) {
selectionTransform(screen.PixelAt(x, y));
}
}
++x;
}
}
private:
std::string text_;
bool has_selection = false;
int selection_start_ = 0;
int selection_end_ = -1;
std::function<void(Pixel& pixel)> selectionTransform;
};
class VText : public Node {