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skia2/modules/skplaintexteditor/app/editor_application.cpp
John Stiles 7bf799956d Reland "Add format-specifier warnings to SkDebugf." 
This is a reland of e58831cd95

Original change's description:
> Add format-specifier warnings to SkDebugf.
>
> This CL fixes up many existing format-specifier violations in Skia.
> Note that GCC has a warning for formatting nothing, so existing calls to
> `SkDebugf("")` have been removed, or replaced with `SkDebugf("%s", "")`.
> These were apparently meant to be used as a place to set a breakpoint.
>
> Some of our clients also use SkDebug with bad format specifiers, so this
> check is currently only enabled when SKIA_IMPLEMENTATION is true.
>
> Change-Id: I8177a1298a624c6936adc24e0d8f481362a356d0
> Bug: skia:12143
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/420902
> Auto-Submit: John Stiles <johnstiles@google.com>
> Commit-Queue: Brian Osman <brianosman@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>

Bug: skia:12143
Change-Id: Id3c0c21436ebd13899908d5ed5d44c42a0e23921
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/421918
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2021-06-25 17:57:43 +00:00

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// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
// Proof of principle of a text editor written with Skia & SkShaper.
// https://bugs.skia.org/9020
#include "include/core/SkCanvas.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTime.h"
#include "tools/sk_app/Application.h"
#include "tools/sk_app/Window.h"
#include "tools/skui/ModifierKey.h"
#include "modules/skplaintexteditor/include/editor.h"
#include "third_party/icu/SkLoadICU.h"
#include <fstream>
#include <memory>
using SkPlainTextEditor::Editor;
using SkPlainTextEditor::StringView;
#ifdef SK_EDITOR_DEBUG_OUT
static const char* key_name(skui::Key k) {
switch (k) {
#define M(X) case skui::Key::k ## X: return #X
M(NONE); M(LeftSoftKey); M(RightSoftKey); M(Home); M(Back); M(Send); M(End); M(0); M(1);
M(2); M(3); M(4); M(5); M(6); M(7); M(8); M(9); M(Star); M(Hash); M(Up); M(Down); M(Left);
M(Right); M(Tab); M(PageUp); M(PageDown); M(Delete); M(Escape); M(Shift); M(Ctrl);
M(Option); M(A); M(C); M(V); M(X); M(Y); M(Z); M(OK); M(VolUp); M(VolDown); M(Power);
M(Camera);
#undef M
default: return "?";
}
}
static SkString modifiers_desc(skui::ModifierKey m) {
SkString s;
#define M(X) if (m & skui::ModifierKey::k ## X ##) { s.append(" {" #X "}"); }
M(Shift) M(Control) M(Option) M(Command) M(FirstPress)
#undef M
return s;
}
static void debug_on_char(SkUnichar c, skui::ModifierKey modifiers) {
SkString m = modifiers_desc(modifiers);
if ((unsigned)c < 0x100) {
SkDebugf("char: %c (0x%02X)%s\n", (char)(c & 0xFF), (unsigned)c, m.c_str());
} else {
SkDebugf("char: 0x%08X%s\n", (unsigned)c, m.c_str());
}
}
static void debug_on_key(skui::Key key, skui::InputState, skui::ModifierKey modi) {
SkDebugf("key: %s%s\n", key_name(key), modifiers_desc(modi).c_str());
}
#endif // SK_EDITOR_DEBUG_OUT
static Editor::Movement convert(skui::Key key) {
switch (key) {
case skui::Key::kLeft: return Editor::Movement::kLeft;
case skui::Key::kRight: return Editor::Movement::kRight;
case skui::Key::kUp: return Editor::Movement::kUp;
case skui::Key::kDown: return Editor::Movement::kDown;
case skui::Key::kHome: return Editor::Movement::kHome;
case skui::Key::kEnd: return Editor::Movement::kEnd;
default: return Editor::Movement::kNowhere;
}
}
namespace {
struct Timer {
double fTime;
const char* fDesc;
Timer(const char* desc = "") : fTime(SkTime::GetNSecs()), fDesc(desc) {}
~Timer() { SkDebugf("%s: %5d μs\n", fDesc, (int)((SkTime::GetNSecs() - fTime) * 1e-3)); }
};
static constexpr float kFontSize = 18;
static const char* kTypefaces[3] = {"sans-serif", "serif", "monospace"};
static constexpr size_t kTypefaceCount = SK_ARRAY_COUNT(kTypefaces);
static constexpr SkFontStyle::Weight kFontWeight = SkFontStyle::kNormal_Weight;
static constexpr SkFontStyle::Width kFontWidth = SkFontStyle::kNormal_Width;
static constexpr SkFontStyle::Slant kFontSlant = SkFontStyle::kUpright_Slant;
struct EditorLayer : public sk_app::Window::Layer {
SkString fPath;
sk_app::Window* fParent = nullptr;
// TODO(halcanary): implement a cross-platform clipboard interface.
std::vector<char> fClipboard;
Editor fEditor;
Editor::TextPosition fTextPos{0, 0};
Editor::TextPosition fMarkPos;
int fPos = 0; // window pixel position in file
int fWidth = 0; // window width
int fHeight = 0; // window height
int fMargin = 10;
size_t fTypefaceIndex = 0;
float fFontSize = kFontSize;
bool fShiftDown = false;
bool fBlink = false;
bool fMouseDown = false;
void setFont() {
fEditor.setFont(SkFont(SkTypeface::MakeFromName(kTypefaces[fTypefaceIndex],
SkFontStyle(kFontWeight, kFontWidth, kFontSlant)), fFontSize));
}
void loadFile(const char* path) {
if (sk_sp<SkData> data = SkData::MakeFromFileName(path)) {
fPath = path;
fEditor.insert(Editor::TextPosition{0, 0},
(const char*)data->data(), data->size());
} else {
fPath = "output.txt";
}
}
void onPaint(SkSurface* surface) override {
SkCanvas* canvas = surface->getCanvas();
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect({0, 0, (float)fWidth, (float)fHeight});
canvas->translate(fMargin, (float)(fMargin - fPos));
Editor::PaintOpts options;
options.fCursor = fTextPos;
options.fCursorColor = {1, 0, 0, fBlink ? 0.0f : 1.0f};
options.fBackgroundColor = SkColor4f{0.8f, 0.8f, 0.8f, 1};
options.fCursorColor = {1, 0, 0, fBlink ? 0.0f : 1.0f};
if (fMarkPos != Editor::TextPosition()) {
options.fSelectionBegin = fMarkPos;
options.fSelectionEnd = fTextPos;
}
#ifdef SK_EDITOR_DEBUG_OUT
{
Timer timer("shaping");
fEditor.paint(nullptr, options);
}
Timer timer("painting");
#endif // SK_EDITOR_DEBUG_OUT
fEditor.paint(canvas, options);
}
void onResize(int width, int height) override {
if (SkISize{fWidth, fHeight} != SkISize{width, height}) {
fHeight = height;
if (width != fWidth) {
fWidth = width;
fEditor.setWidth(fWidth - 2 * fMargin);
}
this->inval();
}
}
void onAttach(sk_app::Window* w) override { fParent = w; }
bool scroll(int delta) {
int maxPos = std::max(0, fEditor.getHeight() + 2 * fMargin - fHeight / 2);
int newpos = std::max(0, std::min(fPos + delta, maxPos));
if (newpos != fPos) {
fPos = newpos;
this->inval();
}
return true;
}
void inval() { if (fParent) { fParent->inval(); } }
bool onMouseWheel(float delta, skui::ModifierKey) override {
this->scroll(-(int)(delta * fEditor.font().getSpacing()));
return true;
}
bool onMouse(int x, int y, skui::InputState state, skui::ModifierKey modifiers) override {
bool mouseDown = skui::InputState::kDown == state;
if (mouseDown) {
fMouseDown = true;
} else if (skui::InputState::kUp == state) {
fMouseDown = false;
}
bool shiftOrDrag = sknonstd::Any(modifiers & skui::ModifierKey::kShift) || !mouseDown;
if (fMouseDown) {
return this->move(fEditor.getPosition({x - fMargin, y + fPos - fMargin}), shiftOrDrag);
}
return false;
}
bool onChar(SkUnichar c, skui::ModifierKey modi) override {
using sknonstd::Any;
modi &= ~skui::ModifierKey::kFirstPress;
if (!Any(modi & (skui::ModifierKey::kControl |
skui::ModifierKey::kOption |
skui::ModifierKey::kCommand))) {
if (((unsigned)c < 0x7F && (unsigned)c >= 0x20) || c == '\n') {
char ch = (char)c;
fEditor.insert(fTextPos, &ch, 1);
#ifdef SK_EDITOR_DEBUG_OUT
SkDebugf("insert: %X'%c'\n", (unsigned)c, ch);
#endif // SK_EDITOR_DEBUG_OUT
return this->moveCursor(Editor::Movement::kRight);
}
}
static constexpr skui::ModifierKey kCommandOrControl = skui::ModifierKey::kCommand |
skui::ModifierKey::kControl;
if (Any(modi & kCommandOrControl) && !Any(modi & ~kCommandOrControl)) {
switch (c) {
case 'p':
for (StringView str : fEditor.text()) {
SkDebugf(">> '%.*s'\n", (int)str.size, str.data);
}
return true;
case 's':
{
std::ofstream out(fPath.c_str());
size_t count = fEditor.lineCount();
for (size_t i = 0; i < count; ++i) {
if (i != 0) {
out << '\n';
}
StringView str = fEditor.line(i);
out.write(str.data, str.size);
}
}
return true;
case 'c':
if (fMarkPos != Editor::TextPosition()) {
fClipboard.resize(fEditor.copy(fMarkPos, fTextPos, nullptr));
fEditor.copy(fMarkPos, fTextPos, fClipboard.data());
return true;
}
return false;
case 'x':
if (fMarkPos != Editor::TextPosition()) {
fClipboard.resize(fEditor.copy(fMarkPos, fTextPos, nullptr));
fEditor.copy(fMarkPos, fTextPos, fClipboard.data());
(void)this->move(fEditor.remove(fMarkPos, fTextPos), false);
this->inval();
return true;
}
return false;
case 'v':
if (fClipboard.size()) {
fEditor.insert(fTextPos, fClipboard.data(), fClipboard.size());
this->inval();
return true;
}
return false;
case '0':
fTypefaceIndex = (fTypefaceIndex + 1) % kTypefaceCount;
this->setFont();
return true;
case '=':
case '+':
fFontSize = fFontSize + 1;
this->setFont();
return true;
case '-':
case '_':
if (fFontSize > 1) {
fFontSize = fFontSize - 1;
this->setFont();
}
}
}
#ifdef SK_EDITOR_DEBUG_OUT
debug_on_char(c, modifiers);
#endif // SK_EDITOR_DEBUG_OUT
return false;
}
bool moveCursor(Editor::Movement m, bool shift = false) {
return this->move(fEditor.move(m, fTextPos), shift);
}
bool move(Editor::TextPosition pos, bool shift) {
if (pos == fTextPos || pos == Editor::TextPosition()) {
if (!shift) {
fMarkPos = Editor::TextPosition();
}
return false;
}
if (shift != fShiftDown) {
fMarkPos = shift ? fTextPos : Editor::TextPosition();
fShiftDown = shift;
}
fTextPos = pos;
// scroll if needed.
SkIRect cursor = fEditor.getLocation(fTextPos).roundOut();
if (fPos < cursor.bottom() - fHeight + 2 * fMargin) {
fPos = cursor.bottom() - fHeight + 2 * fMargin;
} else if (cursor.top() < fPos) {
fPos = cursor.top();
}
this->inval();
return true;
}
bool onKey(skui::Key key,
skui::InputState state,
skui::ModifierKey modifiers) override {
if (state != skui::InputState::kDown) {
return false; // ignore keyup
}
// ignore other modifiers.
using sknonstd::Any;
skui::ModifierKey ctrlAltCmd = modifiers & (skui::ModifierKey::kControl |
skui::ModifierKey::kOption |
skui::ModifierKey::kCommand);
bool shift = Any(modifiers & (skui::ModifierKey::kShift));
if (!Any(ctrlAltCmd)) {
// no modifiers
switch (key) {
case skui::Key::kPageDown:
return this->scroll(fHeight * 4 / 5);
case skui::Key::kPageUp:
return this->scroll(-fHeight * 4 / 5);
case skui::Key::kLeft:
case skui::Key::kRight:
case skui::Key::kUp:
case skui::Key::kDown:
case skui::Key::kHome:
case skui::Key::kEnd:
return this->moveCursor(convert(key), shift);
case skui::Key::kDelete:
if (fMarkPos != Editor::TextPosition()) {
(void)this->move(fEditor.remove(fMarkPos, fTextPos), false);
} else {
auto pos = fEditor.move(Editor::Movement::kRight, fTextPos);
(void)this->move(fEditor.remove(fTextPos, pos), false);
}
this->inval();
return true;
case skui::Key::kBack:
if (fMarkPos != Editor::TextPosition()) {
(void)this->move(fEditor.remove(fMarkPos, fTextPos), false);
} else {
auto pos = fEditor.move(Editor::Movement::kLeft, fTextPos);
(void)this->move(fEditor.remove(fTextPos, pos), false);
}
this->inval();
return true;
case skui::Key::kOK:
return this->onChar('\n', modifiers);
default:
break;
}
} else if (sknonstd::Any(ctrlAltCmd & (skui::ModifierKey::kControl |
skui::ModifierKey::kCommand))) {
switch (key) {
case skui::Key::kLeft:
return this->moveCursor(Editor::Movement::kWordLeft, shift);
case skui::Key::kRight:
return this->moveCursor(Editor::Movement::kWordRight, shift);
default:
break;
}
}
#ifdef SK_EDITOR_DEBUG_OUT
debug_on_key(key, state, modifiers);
#endif // SK_EDITOR_DEBUG_OUT
return false;
}
};
#ifdef SK_VULKAN
static constexpr sk_app::Window::BackendType kBackendType = sk_app::Window::kVulkan_BackendType;
#elif SK_METAL
static constexpr sk_app::Window::BackendType kBackendType = sk_app::Window::kMetal_BackendType;
#elif SK_GL
static constexpr sk_app::Window::BackendType kBackendType = sk_app::Window::kNativeGL_BackendType;
#elif SK_DAWN
static constexpr sk_app::Window::BackendType kBackendType = sk_app::Window::kDawn_BackendType;
#else
static constexpr sk_app::Window::BackendType kBackendType = sk_app::Window::kRaster_BackendType;
#endif
struct EditorApplication : public sk_app::Application {
std::unique_ptr<sk_app::Window> fWindow;
EditorLayer fLayer;
double fNextTime = -DBL_MAX;
EditorApplication(std::unique_ptr<sk_app::Window> win) : fWindow(std::move(win)) {}
bool init(const char* path) {
fWindow->attach(kBackendType);
fLayer.loadFile(path);
fLayer.setFont();
fWindow->pushLayer(&fLayer);
fWindow->setTitle(SkStringPrintf("Editor: \"%s\"", fLayer.fPath.c_str()).c_str());
fLayer.onResize(fWindow->width(), fWindow->height());
fLayer.fEditor.paint(nullptr, Editor::PaintOpts());
fWindow->show();
return true;
}
~EditorApplication() override { fWindow->detach(); }
void onIdle() override {
double now = SkTime::GetNSecs();
if (now >= fNextTime) {
constexpr double kHalfPeriodNanoSeconds = 0.5 * 1e9;
fNextTime = now + kHalfPeriodNanoSeconds;
fLayer.fBlink = !fLayer.fBlink;
fWindow->inval();
}
}
};
} // namespace
sk_app::Application* sk_app::Application::Create(int argc, char** argv, void* dat) {
if (!SkLoadICU()) {
SK_ABORT("SkLoadICU failed.");
}
std::unique_ptr<sk_app::Window> win(sk_app::Window::CreateNativeWindow(dat));
if (!win) {
SK_ABORT("CreateNativeWindow failed.");
}
std::unique_ptr<EditorApplication> app(new EditorApplication(std::move(win)));
(void)app->init(argc > 1 ? argv[1] : nullptr);
return app.release();
}
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