blob: 81f5a2aaabe0a375edb391c90b165126cff01c99 [file] [log] [blame]
* Copyright 2022 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkottieTextEditor_DEFINED
#define SkottieTextEditor_DEFINED
#include "include/core/SkPath.h"
#include "modules/skottie/include/SkottieProperty.h"
#include "tools/skui/InputState.h"
#include "tools/skui/ModifierKey.h"
#include <chrono>
// A sample WYSIWYG text editor built using the GlyphDecorator API.
class SkottieTextEditor final : public skottie::GlyphDecorator {
explicit SkottieTextEditor(std::unique_ptr<skottie::TextPropertyHandle>&&,
~SkottieTextEditor() override;
void toggleEnabled();
void onDecorate(SkCanvas*, const TextInfo&) override;
bool onMouseInput(SkScalar x, SkScalar y, skui::InputState state, skui::ModifierKey);
bool onCharInput(SkUnichar c);
struct GlyphData {
SkRect fDevBounds; // Glyph bounds mapped to device space.
size_t fCluster; // UTF8 cluster index.
std::tuple<size_t, size_t> currentSelection() const;
size_t closestGlyph(const SkPoint& pt) const;
void drawCursor(SkCanvas*, const TextInfo&) const;
void insertChar(SkUnichar c);
void deleteChars(size_t offset, size_t count);
bool deleteSelection();
void updateDeps(const SkString&);
const std::unique_ptr<skottie::TextPropertyHandle> fTextProp;
const std::vector<std::unique_ptr<skottie::TextPropertyHandle>> fDependentProps;
const SkPath fCursorPath;
const SkRect fCursorBounds;
std::vector<GlyphData> fGlyphData;
std::tuple<size_t, size_t> fSelection = {0,0}; // Indices in the glyphs domain.
size_t fCursorIndex = 0; // Index in the UTF8 domain.
bool fEnabled = false;
bool fMouseDown = false;
std::chrono::time_point<std::chrono::steady_clock> fTimeBase;
#endif // SkottieTextEditor_DEFINED