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skia2/samplecode/SampleParagraph.cpp

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Reland "SkParagraph" This is a reland of 10ad0b9b01e4b8a4721ae2ec1adee9ca7d0fe534 Original change's description: > SkParagraph > > Change-Id: I0a4be75fd0c18021c201bcc1edfdfad8556edeff > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/192100 > Reviewed-by: Ben Wagner <bungeman@google.com> > Reviewed-by: Mike Reed <reed@google.com> > Commit-Queue: Julia Lavrova <jlavrova@google.com> Change-Id: I46cf43eae693edf68e45345acd0eb39e04e02bfc Reviewed-on: https://skia-review.googlesource.com/c/skia/+/219863 Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Julia Lavrova <jlavrova@google.com>
2019-05-30 20:12:56 +00:00
// Copyright 2019 Google LLC.
#include "Sample.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkGraphics.h"
#include "include/core/SkPath.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkStream.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTime.h"
#include "include/core/SkTypeface.h"
#include "include/effects/SkBlurMaskFilter.h"
#include "include/effects/SkGradientShader.h"
#include "include/utils/SkRandom.h"
#include "modules/skparagraph/include/Paragraph.h"
#include "modules/skparagraph/src/ParagraphBuilderImpl.h"
#include "modules/skparagraph/src/ParagraphImpl.h"
#include "modules/skparagraph/src/TypefaceFontProvider.h"
#include "src/core/SkOSFile.h"
#include "src/shaders/SkColorShader.h"
#include "src/utils/SkUTF.h"
#include "tools/Resources.h"
using namespace skia::textlayout;
namespace {
sk_sp<SkShader> setgrad(const SkRect& r, SkColor c0, SkColor c1) {
SkColor colors[] = {c0, c1};
SkPoint pts[] = {{r.fLeft, r.fTop}, {r.fRight, r.fTop}};
return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kClamp);
}
class TestFontCollection : public FontCollection {
public:
TestFontCollection() : fResourceDir(GetResourcePath("fonts").c_str()) {
auto fontProvider = sk_make_sp<TypefaceFontProvider>();
SkOSFile::Iter iter(fResourceDir.c_str());
SkString path;
while (iter.next(&path)) {
SkString file_path;
file_path.printf("%s/%s", fResourceDir.c_str(), path.c_str());
fontProvider->registerTypeface(SkTypeface::MakeFromFile(file_path.c_str()));
}
this->setTestFontManager(std::move(fontProvider));
this->disableFontFallback();
}
~TestFontCollection() = default;
private:
std::string fResourceDir;
};
} // namespace
class ParagraphView1 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph1");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawTest(SkCanvas* canvas, SkScalar w, SkScalar h, SkColor fg, SkColor bg) {
const std::vector<
std::tuple<std::string, bool, bool, int, SkColor, SkColor, bool, TextDecorationStyle>>
gParagraph = {{"monospace", true, false, 14, SK_ColorWHITE, SK_ColorRED, true,
TextDecorationStyle::kDashed},
{"Assyrian", false, false, 20, SK_ColorWHITE, SK_ColorBLUE, false,
TextDecorationStyle::kDotted},
{"serif", true, true, 10, SK_ColorWHITE, SK_ColorRED, true,
TextDecorationStyle::kDouble},
{"Arial", false, true, 16, SK_ColorGRAY, SK_ColorGREEN, true,
TextDecorationStyle::kSolid},
{"sans-serif", false, false, 8, SK_ColorWHITE, SK_ColorRED, false,
TextDecorationStyle::kWavy}};
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
canvas->drawColor(SK_ColorWHITE);
SkScalar margin = 20;
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(fg);
SkPaint blue;
blue.setColor(SK_ColorBLUE);
TextStyle defaultStyle;
defaultStyle.setBackgroundColor(blue);
defaultStyle.setForegroundColor(paint);
ParagraphStyle paraStyle;
for (auto i = 1; i < 5; ++i) {
defaultStyle.setFontSize(24 * i);
paraStyle.setTextStyle(defaultStyle);
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<FontCollection>());
std::string name = "Paragraph: " + std::to_string(24 * i);
builder.addText(name.c_str());
for (auto para : gParagraph) {
TextStyle style;
style.setFontFamilies({SkString(std::get<0>(para).c_str())});
SkFontStyle fontStyle(std::get<1>(para) ? SkFontStyle::Weight::kBold_Weight
: SkFontStyle::Weight::kNormal_Weight,
SkFontStyle::Width::kNormal_Width,
std::get<2>(para) ? SkFontStyle::Slant::kItalic_Slant
: SkFontStyle::Slant::kUpright_Slant);
style.setFontStyle(fontStyle);
style.setFontSize(std::get<3>(para) * i);
SkPaint background;
background.setColor(std::get<4>(para));
style.setBackgroundColor(background);
SkPaint foreground;
foreground.setColor(std::get<5>(para));
foreground.setAntiAlias(true);
style.setForegroundColor(foreground);
if (std::get<6>(para)) {
style.addShadow(TextShadow(SK_ColorBLACK, SkPoint::Make(5, 5), 2));
}
auto decoration = (i % 4);
if (decoration == 3) {
decoration = 4;
}
bool test = (TextDecoration)decoration != TextDecoration::kNoDecoration;
std::string deco = std::to_string((int)decoration);
if (test) {
style.setDecoration((TextDecoration)decoration);
style.setDecorationStyle(std::get<7>(para));
style.setDecorationColor(std::get<5>(para));
}
builder.pushStyle(style);
std::string name = " " + std::get<0>(para) + " " +
(std::get<1>(para) ? ", bold" : "") +
(std::get<2>(para) ? ", italic" : "") + " " +
std::to_string(std::get<3>(para) * i) +
(std::get<4>(para) != bg ? ", background" : "") +
(std::get<5>(para) != fg ? ", foreground" : "") +
(std::get<6>(para) ? ", shadow" : "") +
(test ? ", decorations " + deco : "") + ";";
builder.addText(name.c_str());
builder.pop();
}
auto paragraph = builder.Build();
paragraph->layout(w - margin * 2);
paragraph->paint(canvas, margin, margin);
canvas->translate(0, paragraph->getHeight());
}
}
void onDrawContent(SkCanvas* canvas) override {
drawTest(canvas, this->width(), this->height(), SK_ColorRED, SK_ColorWHITE);
}
private:
typedef Sample INHERITED;
};
class ParagraphView2 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph2");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawCode(SkCanvas* canvas, SkScalar w, SkScalar h) {
SkPaint comment;
comment.setColor(SK_ColorGRAY);
SkPaint constant;
constant.setColor(SK_ColorMAGENTA);
SkPaint null;
null.setColor(SK_ColorMAGENTA);
SkPaint literal;
literal.setColor(SK_ColorGREEN);
SkPaint code;
code.setColor(SK_ColorDKGRAY);
SkPaint number;
number.setColor(SK_ColorBLUE);
SkPaint name;
name.setColor(SK_ColorRED);
SkPaint white;
white.setColor(SK_ColorWHITE);
TextStyle defaultStyle;
defaultStyle.setBackgroundColor(white);
defaultStyle.setForegroundColor(code);
defaultStyle.setFontFamilies({SkString("monospace")});
defaultStyle.setFontSize(30);
ParagraphStyle paraStyle;
paraStyle.setTextStyle(defaultStyle);
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<FontCollection>());
builder.pushStyle(style(name));
builder.addText("RaisedButton");
builder.pop();
builder.addText("(\n");
builder.addText(" child: ");
builder.pushStyle(style(constant));
builder.addText("const");
builder.pop();
builder.addText(" ");
builder.pushStyle(style(name));
builder.addText("Text");
builder.pop();
builder.addText("(");
builder.pushStyle(style(literal));
builder.addText("'BUTTON TITLE'");
builder.pop();
builder.addText("),\n");
auto paragraph = builder.Build();
paragraph->layout(w - 20);
paragraph->paint(canvas, 20, 20);
}
TextStyle style(SkPaint paint) {
TextStyle style;
paint.setAntiAlias(true);
style.setForegroundColor(paint);
style.setFontFamilies({SkString("monospace")});
style.setFontSize(30);
return style;
}
void drawText(SkCanvas* canvas, SkScalar w, SkScalar h, std::vector<std::string>& text,
SkColor fg = SK_ColorDKGRAY, SkColor bg = SK_ColorWHITE,
const char* ff = "sans-serif", SkScalar fs = 24,
size_t lineLimit = 30,
const std::u16string& ellipsis = u"\u2026") {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
canvas->drawColor(bg);
SkScalar margin = 20;
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(fg);
SkPaint blue;
blue.setColor(SK_ColorBLUE);
SkPaint background;
background.setColor(bg);
TextStyle style;
style.setBackgroundColor(blue);
style.setForegroundColor(paint);
style.setFontFamilies({SkString(ff)});
style.setFontStyle(SkFontStyle(SkFontStyle::kMedium_Weight,
SkFontStyle::kNormal_Width,
SkFontStyle::kUpright_Slant));
style.setFontSize(fs);
ParagraphStyle paraStyle;
paraStyle.setTextStyle(style);
paraStyle.setMaxLines(lineLimit);
paraStyle.setEllipsis(ellipsis);
TextStyle defaultStyle;
defaultStyle.setFontSize(20);
paraStyle.setTextStyle(defaultStyle);
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<TestFontCollection>());
SkPaint foreground;
foreground.setColor(fg);
style.setForegroundColor(foreground);
style.setBackgroundColor(background);
for (auto& part : text) {
builder.pushStyle(style);
builder.addText(part.c_str());
builder.pop();
}
auto paragraph = builder.Build();
paragraph->layout(w - margin * 2);
paragraph->paint(canvas, margin, margin);
canvas->translate(0, paragraph->getHeight() + margin);
}
void drawLine(SkCanvas* canvas, SkScalar w, SkScalar h, const std::string& text,
TextAlign align) {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
canvas->drawColor(SK_ColorWHITE);
SkScalar margin = 20;
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(SK_ColorBLUE);
SkPaint gray;
gray.setColor(SK_ColorLTGRAY);
TextStyle style;
style.setBackgroundColor(gray);
style.setForegroundColor(paint);
style.setFontFamilies({SkString("Arial")});
style.setFontSize(30);
ParagraphStyle paraStyle;
paraStyle.setTextStyle(style);
paraStyle.setTextAlign(align);
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<FontCollection>());
builder.addText(text.c_str());
auto paragraph = builder.Build();
paragraph->layout(w - margin * 2);
paragraph->layout(w - margin);
paragraph->paint(canvas, margin, margin);
canvas->translate(0, paragraph->getHeight() + margin);
}
void onDrawContent(SkCanvas* canvas) override {
std::vector<std::string> cupertino = {
"google_logogoogle_gsuper_g_logo 1 "
"google_logogoogle_gsuper_g_logo 12 "
"google_logogoogle_gsuper_g_logo 123 "
"google_logogoogle_gsuper_g_logo 1234 "
"google_logogoogle_gsuper_g_logo 12345 "
"google_logogoogle_gsuper_g_logo 123456 "
"google_logogoogle_gsuper_g_logo 1234567 "
"google_logogoogle_gsuper_g_logo 12345678 "
"google_logogoogle_gsuper_g_logo 123456789 "
"google_logogoogle_gsuper_g_logo 1234567890 "
"google_logogoogle_gsuper_g_logo 123456789 "
"google_logogoogle_gsuper_g_logo 12345678 "
"google_logogoogle_gsuper_g_logo 1234567 "
"google_logogoogle_gsuper_g_logo 123456 "
"google_logogoogle_gsuper_g_logo 12345 "
"google_logogoogle_gsuper_g_logo 1234 "
"google_logogoogle_gsuper_g_logo 123 "
"google_logogoogle_gsuper_g_logo 12 "
"google_logogoogle_gsuper_g_logo 1 "
"google_logogoogle_gsuper_g_logo "
"google_logogoogle_gsuper_g_logo "
"google_logogoogle_gsuper_g_logo "
"google_logogoogle_gsuper_g_logo "
"google_logogoogle_gsuper_g_logo "
"google_logogoogle_gsuper_g_logo"};
std::vector<std::string> text = {
"My neighbor came over to say,\n"
"Although not in a neighborly way,\n\n"
"That he'd knock me around,\n\n\n"
"If I didn't stop the sound,\n\n\n\n"
"Of the classical music I play."};
std::vector<std::string> long_word = {
"A_very_very_very_very_very_very_very_very_very_very_very_very_very_very_very_very_"
"very_very_very_very_very_very_very_very_very_very_very_very_very_very_very_very_"
"very_very_very_very_very_very_very_very_very_very_very_very_very_very_very_very_"
"very_very_very_very_very_very_very_long_text"};
std::vector<std::string> very_long = {
"A very very very very very very very very very very very very very very very very "
"very very very very very very very very very very very very very very very very "
"very very very very very very very very very very very very very very very very "
"very very very very very very very long text"};
std::vector<std::string> very_word = {
"A very_very_very_very_very_very_very_very_very_very "
"very_very_very_very_very_very_very_very_very_very very very very very very very "
"very very very very very very very very very very very very very very very very "
"very very very very very very very very very very very very very long text"};
SkScalar width = this->width() / 5;
SkScalar height = this->height();
drawText(canvas, width, height, long_word, SK_ColorBLACK, SK_ColorWHITE, "Google Sans", 30);
canvas->translate(width, 0);
drawText(canvas, width, height, very_long, SK_ColorBLACK, SK_ColorWHITE, "Google Sans", 30);
canvas->translate(width, 0);
drawText(canvas, width, height, very_word, SK_ColorBLACK, SK_ColorWHITE, "Google Sans", 30);
canvas->translate(width, 0);
drawText(canvas, width, height / 2, text, SK_ColorBLACK, SK_ColorWHITE, "Roboto", 20, 100,
u"\u2026");
canvas->translate(0, height / 2);
drawCode(canvas, width, height / 2);
canvas->translate(width, -height / 2);
drawText(canvas, width, height, cupertino, SK_ColorBLACK, SK_ColorWHITE, "Google Sans", 30);
}
private:
typedef Sample INHERITED;
};
class ParagraphView3 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph3");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawLine(SkCanvas* canvas, SkScalar w, SkScalar h, const std::string& text,
TextAlign align, size_t lineLimit = std::numeric_limits<size_t>::max(),
bool RTL = false, SkColor background = SK_ColorGRAY,
const std::u16string& ellipsis = u"\u2026") {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
canvas->drawColor(SK_ColorWHITE);
SkScalar margin = 20;
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(SK_ColorBLACK);
SkPaint gray;
gray.setColor(background);
SkPaint yellow;
yellow.setColor(SK_ColorYELLOW);
TextStyle style;
style.setBackgroundColor(gray);
style.setForegroundColor(paint);
style.setFontFamilies({SkString("sans-serif")});
style.setFontSize(30);
ParagraphStyle paraStyle;
paraStyle.setTextStyle(style);
paraStyle.setTextAlign(align);
paraStyle.setMaxLines(lineLimit);
paraStyle.setEllipsis(ellipsis);
// paraStyle.setTextDirection(RTL ? SkTextDirection::rtl : SkTextDirection::ltr);
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<FontCollection>());
if (RTL) {
builder.addText(mirror(text));
} else {
builder.addText(normal(text));
}
canvas->drawRect(SkRect::MakeXYWH(margin, margin, w - margin * 2, h - margin * 2), yellow);
auto paragraph = builder.Build();
paragraph->layout(w - margin * 2);
paragraph->paint(canvas, margin, margin);
}
std::u16string mirror(const std::string& text) {
std::u16string result;
result += u"\u202E";
// for (auto i = text.size(); i > 0; --i) {
// result += text[i - 1];
//}
for (auto i = text.size(); i > 0; --i) {
auto ch = text[i - 1];
if (ch == ',') {
result += u"!";
} else if (ch == '.') {
result += u"!";
} else {
result += ch;
}
}
result += u"\u202C";
return result;
}
std::u16string normal(const std::string& text) {
std::u16string result;
result += u"\u202D";
for (auto ch : text) {
result += ch;
}
result += u"\u202C";
return result;
}
void onDrawContent(SkCanvas* canvas) override {
const std::string options = // { "open-source open-source open-source open-source" };
{"Flutter is an open-source project to help developers "
"build high-performance, high-fidelity, mobile apps for "
"iOS and Android "
"from a single codebase. This design lab is a playground "
"and showcase of Flutter's many widgets, behaviors, "
"animations, layouts, and more."};
canvas->drawColor(SK_ColorDKGRAY);
SkScalar width = this->width() / 4;
SkScalar height = this->height() / 2;
const std::string line =
"World domination is such an ugly phrase - I prefer to call it world optimisation";
drawLine(canvas, width, height, line, TextAlign::kLeft, 1, false, SK_ColorLTGRAY);
canvas->translate(width, 0);
drawLine(canvas, width, height, line, TextAlign::kRight, 2, false, SK_ColorLTGRAY);
canvas->translate(width, 0);
drawLine(canvas, width, height, line, TextAlign::kCenter, 3, false, SK_ColorLTGRAY);
canvas->translate(width, 0);
drawLine(canvas, width, height, line, TextAlign::kJustify, 4, false, SK_ColorLTGRAY);
canvas->translate(-width * 3, height);
drawLine(canvas, width, height, line, TextAlign::kLeft, 1, true, SK_ColorLTGRAY);
canvas->translate(width, 0);
drawLine(canvas, width, height, line, TextAlign::kRight, 2, true, SK_ColorLTGRAY);
canvas->translate(width, 0);
drawLine(canvas, width, height, line, TextAlign::kCenter, 3, true, SK_ColorLTGRAY);
canvas->translate(width, 0);
drawLine(canvas, width, height, line, TextAlign::kJustify, 4, true, SK_ColorLTGRAY);
canvas->translate(width, 0);
}
private:
typedef Sample INHERITED;
};
class ParagraphView4 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph4");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawFlutter(SkCanvas* canvas, SkScalar w, SkScalar h,
const char* ff = "Google Sans", SkScalar fs = 30,
size_t lineLimit = std::numeric_limits<size_t>::max(),
const std::u16string& ellipsis = u"\u2026") {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
SkScalar margin = 20;
SkPaint black;
black.setAntiAlias(true);
black.setColor(SK_ColorBLACK);
SkPaint blue;
blue.setAntiAlias(true);
blue.setColor(SK_ColorBLUE);
SkPaint red;
red.setAntiAlias(true);
red.setColor(SK_ColorRED);
SkPaint green;
green.setAntiAlias(true);
green.setColor(SK_ColorGREEN);
SkPaint gray;
gray.setColor(SK_ColorLTGRAY);
SkPaint yellow;
yellow.setColor(SK_ColorYELLOW);
SkPaint magenta;
magenta.setAntiAlias(true);
magenta.setColor(SK_ColorMAGENTA);
TextStyle style;
style.setFontFamilies({SkString(ff)});
style.setFontSize(fs);
TextStyle style0;
style0.setForegroundColor(black);
style0.setBackgroundColor(gray);
style0.setFontFamilies({SkString(ff)});
style0.setFontSize(fs);
style0.setDecoration(TextDecoration::kUnderline);
style0.setDecorationStyle(TextDecorationStyle::kDouble);
style0.setDecorationColor(SK_ColorBLACK);
TextStyle style1;
style1.setForegroundColor(blue);
style1.setBackgroundColor(yellow);
style1.setFontFamilies({SkString(ff)});
style1.setFontSize(fs);
style1.setDecoration(TextDecoration::kOverline);
style1.setDecorationStyle(TextDecorationStyle::kWavy);
style1.setDecorationColor(SK_ColorBLACK);
TextStyle style2;
style2.setForegroundColor(red);
style2.setFontFamilies({SkString(ff)});
style2.setFontSize(fs);
TextStyle style3;
style3.setForegroundColor(green);
style3.setFontFamilies({SkString(ff)});
style3.setFontSize(fs);
TextStyle style4;
style4.setForegroundColor(magenta);
style4.setFontFamilies({SkString(ff)});
style4.setFontSize(fs);
ParagraphStyle paraStyle;
paraStyle.setTextStyle(style);
paraStyle.setMaxLines(lineLimit);
paraStyle.setEllipsis(ellipsis);
const char* logo1 = "google_";
const char* logo2 = "logo";
const char* logo3 = "go";
const char* logo4 = "ogle_logo";
const char* logo5 = "google_lo";
const char* logo6 = "go";
{
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<TestFontCollection>());
builder.pushStyle(style0);
builder.addText(logo1);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo2);
builder.pop();
builder.addText(" ");
builder.pushStyle(style0);
builder.addText(logo3);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo4);
builder.pop();
builder.addText(" ");
builder.pushStyle(style0);
builder.addText(logo5);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo6);
builder.pop();
auto paragraph = builder.Build();
paragraph->layout(w - margin * 2);
paragraph->paint(canvas, margin, margin);
canvas->translate(0, h + margin);
}
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
SkScalar width = this->width();
SkScalar height = this->height();
drawFlutter(canvas, width, height / 2);
}
private:
typedef Sample INHERITED;
};
class ParagraphView5 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph4");
return true;
}
return this->INHERITED::onQuery(evt);
}
void bidi(SkCanvas* canvas, SkScalar w, SkScalar h, const std::u16string& text,
const std::u16string& expected, size_t lineLimit = std::numeric_limits<size_t>::max(),
const char* ff = "Roboto", SkScalar fs = 30,
const std::u16string& ellipsis = u"\u2026") {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
SkScalar margin = 20;
SkPaint black;
black.setColor(SK_ColorBLACK);
SkPaint gray;
gray.setColor(SK_ColorLTGRAY);
TextStyle style;
style.setForegroundColor(black);
style.setFontFamilies({SkString(ff)});
style.setFontSize(fs);
TextStyle style0;
style0.setForegroundColor(black);
style0.setFontFamilies({SkString(ff)});
style0.setFontSize(fs);
style0.setFontStyle(SkFontStyle(SkFontStyle::kNormal_Weight, SkFontStyle::kNormal_Width,
SkFontStyle::kItalic_Slant));
TextStyle style1;
style1.setForegroundColor(gray);
style1.setFontFamilies({SkString(ff)});
style1.setFontSize(fs);
style1.setFontStyle(SkFontStyle(SkFontStyle::kBold_Weight, SkFontStyle::kNormal_Width,
SkFontStyle::kUpright_Slant));
ParagraphStyle paraStyle;
paraStyle.setTextStyle(style);
paraStyle.setMaxLines(lineLimit);
paraStyle.setEllipsis(ellipsis);
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<TestFontCollection>());
if (text.empty()) {
const std::u16string text0 = u"\u202Dabc";
const std::u16string text1 = u"\u202EFED";
const std::u16string text2 = u"\u202Dghi";
const std::u16string text3 = u"\u202ELKJ";
const std::u16string text4 = u"\u202Dmno";
builder.pushStyle(style0);
builder.addText(text0);
builder.pop();
builder.pushStyle(style1);
builder.addText(text1);
builder.pop();
builder.pushStyle(style0);
builder.addText(text2);
builder.pop();
builder.pushStyle(style1);
builder.addText(text3);
builder.pop();
builder.pushStyle(style0);
builder.addText(text4);
builder.pop();
} else {
// icu::UnicodeString unicode((UChar*) text.data(), SkToS32(text.size()));
// std::string str;
// unicode.toUTF8String(str);
// SkDebugf("Text: %s\n", str.c_str());
builder.addText(text + expected);
}
auto paragraph = builder.Build();
paragraph->layout(w - margin * 2);
paragraph->paint(canvas, margin, margin);
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
SkScalar width = this->width();
SkScalar height = this->height() / 8;
const std::u16string text1 =
u"A \u202ENAC\u202Cner, exceedingly \u202ENAC\u202Cny,\n"
"One morning remarked to his granny:\n"
"A \u202ENAC\u202Cner \u202ENAC\u202C \u202ENAC\u202C,\n"
"Anything that he \u202ENAC\u202C,\n"
"But a \u202ENAC\u202Cner \u202ENAC\u202C't \u202ENAC\u202C a \u202ENAC\u202C, "
"\u202ENAC\u202C he?";
bidi(canvas, width, height * 3, text1, u"", 5);
canvas->translate(0, height * 3);
bidi(canvas, width, height, u"\u2067DETALOSI\u2069", u"");
canvas->translate(0, height);
bidi(canvas, width, height, u"\u202BDEDDEBME\u202C", u"");
canvas->translate(0, height);
bidi(canvas, width, height, u"\u202EEDIRREVO\u202C", u"");
canvas->translate(0, height);
bidi(canvas, width, height, u"\u200FTICILPMI\u200E", u"");
canvas->translate(0, height);
bidi(canvas, width, height, u"123 456 7890 \u202EZYXWV UTS RQP ONM LKJ IHG FED CBA\u202C.",
u"", 2);
canvas->translate(0, height);
// bidi(canvas, width, height, u"", u"");
// canvas->translate(0, height);
}
private:
typedef Sample INHERITED;
};
class ParagraphView6 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph4");
return true;
}
return this->INHERITED::onQuery(evt);
}
void hangingS(SkCanvas* canvas, SkScalar w, SkScalar h, SkScalar fs = 60.0) {
auto ff = "HangingS";
canvas->drawColor(SK_ColorLTGRAY);
SkPaint black;
black.setAntiAlias(true);
black.setColor(SK_ColorBLACK);
SkPaint blue;
blue.setAntiAlias(true);
blue.setColor(SK_ColorBLUE);
SkPaint red;
red.setAntiAlias(true);
red.setColor(SK_ColorRED);
SkPaint green;
green.setAntiAlias(true);
green.setColor(SK_ColorGREEN);
SkPaint gray;
gray.setColor(SK_ColorCYAN);
SkPaint yellow;
yellow.setColor(SK_ColorYELLOW);
SkPaint magenta;
magenta.setAntiAlias(true);
magenta.setColor(SK_ColorMAGENTA);
SkFontStyle fontStyle(SkFontStyle::kBold_Weight, SkFontStyle::kNormal_Width,
SkFontStyle::kItalic_Slant);
TextStyle style;
style.setFontFamilies({SkString(ff)});
style.setFontSize(fs);
style.setFontStyle(fontStyle);
TextStyle style0;
style0.setForegroundColor(black);
style0.setBackgroundColor(gray);
style0.setFontFamilies({SkString(ff)});
style0.setFontSize(fs);
style0.setFontStyle(fontStyle);
TextStyle style1;
style1.setForegroundColor(blue);
style1.setBackgroundColor(yellow);
style1.setFontFamilies({SkString(ff)});
style1.setFontSize(fs);
style1.setFontStyle(fontStyle);
TextStyle style2;
style2.setForegroundColor(red);
style2.setFontFamilies({SkString(ff)});
style2.setFontSize(fs);
style2.setFontStyle(fontStyle);
TextStyle style3;
style3.setForegroundColor(green);
style3.setFontFamilies({SkString(ff)});
style3.setFontSize(fs);
style3.setFontStyle(fontStyle);
TextStyle style4;
style4.setForegroundColor(magenta);
style4.setFontFamilies({SkString(ff)});
style4.setFontSize(fs);
style4.setFontStyle(fontStyle);
ParagraphStyle paraStyle;
paraStyle.setTextStyle(style);
const char* logo1 = "S";
const char* logo2 = "kia";
const char* logo3 = "Sk";
const char* logo4 = "ia";
const char* logo5 = "Ski";
const char* logo6 = "a";
{
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<TestFontCollection>());
builder.pushStyle(style0);
builder.addText(logo1);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo2);
builder.pop();
builder.addText(" ");
builder.pushStyle(style0);
builder.addText(logo3);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo4);
builder.pop();
builder.addText(" ");
builder.pushStyle(style0);
builder.addText(logo5);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo6);
builder.pop();
auto paragraph = builder.Build();
paragraph->layout(w);
paragraph->paint(canvas, 40, 40);
canvas->translate(0, h);
}
const char* logo11 = "S";
const char* logo12 = "S";
const char* logo13 = "S";
const char* logo14 = "S";
const char* logo15 = "S";
const char* logo16 = "S";
{
ParagraphBuilderImpl builder(paraStyle, sk_make_sp<TestFontCollection>());
builder.pushStyle(style0);
builder.addText(logo11);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo12);
builder.pop();
builder.addText(" ");
builder.pushStyle(style0);
builder.addText(logo13);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo14);
builder.pop();
builder.addText(" ");
builder.pushStyle(style0);
builder.addText(logo15);
builder.pop();
builder.pushStyle(style1);
builder.addText(logo16);
builder.pop();
auto paragraph = builder.Build();
paragraph->layout(w);
paragraph->paint(canvas, 40, h);
canvas->translate(0, h);
}
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
SkScalar width = this->width();
SkScalar height = this->height() / 4;
hangingS(canvas, width, height);
}
private:
typedef Sample INHERITED;
};
class ParagraphView7 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph7");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawText(SkCanvas* canvas, SkColor background, SkScalar letterSpace, SkScalar w,
SkScalar h) {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
canvas->drawColor(background);
const char* line =
"World domination is such an ugly phrase - I prefer to call it world optimisation";
ParagraphStyle paragraphStyle;
paragraphStyle.setTextAlign(TextAlign::kLeft);
paragraphStyle.setMaxLines(10);
paragraphStyle.turnHintingOff();
TextStyle textStyle;
textStyle.setFontFamilies({SkString("Roboto")});
textStyle.setFontSize(30);
textStyle.setLetterSpacing(letterSpace);
textStyle.setColor(SK_ColorBLACK);
textStyle.setFontStyle(SkFontStyle(SkFontStyle::kMedium_Weight, SkFontStyle::kNormal_Width,
SkFontStyle::kUpright_Slant));
ParagraphBuilderImpl builder(paragraphStyle, sk_make_sp<TestFontCollection>());
builder.pushStyle(textStyle);
builder.addText(line);
builder.pop();
auto paragraph = builder.Build();
paragraph->layout(w - 20);
paragraph->paint(canvas, 10, 10);
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
auto h = this->height() / 4;
auto w = this->width() / 2;
drawText(canvas, SK_ColorGRAY, 1, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorLTGRAY, 2, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorCYAN, 3, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorGRAY, 4, w, h);
canvas->translate(w, -3 * h);
drawText(canvas, SK_ColorYELLOW, 5, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorGREEN, 10, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorRED, 15, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorBLUE, 20, w, h);
canvas->translate(0, h);
}
private:
typedef Sample INHERITED;
};
class ParagraphView8 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph7");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawText(SkCanvas* canvas, SkColor background, SkScalar wordSpace, SkScalar w,
SkScalar h) {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
canvas->drawColor(background);
const char* line =
"World domination is such an ugly phrase - I prefer to call it world optimisation";
ParagraphStyle paragraphStyle;
paragraphStyle.setTextAlign(TextAlign::kLeft);
paragraphStyle.setMaxLines(10);
paragraphStyle.turnHintingOff();
TextStyle textStyle;
textStyle.setFontFamilies({SkString("Roboto")});
textStyle.setFontSize(30);
textStyle.setWordSpacing(wordSpace);
textStyle.setColor(SK_ColorBLACK);
textStyle.setFontStyle(SkFontStyle(SkFontStyle::kMedium_Weight, SkFontStyle::kNormal_Width,
SkFontStyle::kUpright_Slant));
ParagraphBuilderImpl builder(paragraphStyle, sk_make_sp<TestFontCollection>());
builder.pushStyle(textStyle);
builder.addText(line);
builder.pop();
auto paragraph = builder.Build();
paragraph->layout(w - 20);
paragraph->paint(canvas, 10, 10);
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
auto h = this->height() / 4;
auto w = this->width() / 2;
drawText(canvas, SK_ColorGRAY, 1, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorLTGRAY, 2, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorCYAN, 3, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorGRAY, 4, w, h);
canvas->translate(w, -3 * h);
drawText(canvas, SK_ColorYELLOW, 5, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorGREEN, 10, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorRED, 15, w, h);
canvas->translate(0, h);
drawText(canvas, SK_ColorBLUE, 20, w, h);
canvas->translate(0, h);
}
private:
typedef Sample INHERITED;
};
class ParagraphView9 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph9");
return true;
}
SkUnichar uni;
if (Sample::CharQ(*evt, &uni)) {
switch (uni) {
case 'w':
++wordSpacing;
return true;
case 'q':
if (wordSpacing > 0) --wordSpacing;
return true;
case 'l':
++letterSpacing;
return true;
case 'k':
if (letterSpacing > 0) --letterSpacing;
return true;
default:
break;
}
}
return this->INHERITED::onQuery(evt);
}
void drawText(SkCanvas* canvas, SkColor background, SkScalar w, SkScalar h) {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(w, h));
canvas->drawColor(background);
const char* text =
"(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)("
"　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)("
"　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)(　´･‿･｀)";
ParagraphStyle paragraphStyle;
paragraphStyle.setTextAlign(TextAlign::kLeft);
paragraphStyle.setMaxLines(10);
paragraphStyle.turnHintingOff();
TextStyle textStyle;
textStyle.setFontFamilies({SkString("Roboto")});
textStyle.setFontSize(50);
textStyle.setHeight(1.3f);
textStyle.setColor(SK_ColorBLACK);
textStyle.setFontStyle(SkFontStyle(SkFontStyle::kMedium_Weight, SkFontStyle::kNormal_Width,
SkFontStyle::kUpright_Slant));
ParagraphBuilderImpl builder(paragraphStyle, sk_make_sp<TestFontCollection>());
builder.pushStyle(textStyle);
builder.addText(text);
builder.pop();
auto paragraph = builder.Build();
paragraph->layout(550);
std::vector<size_t> sizes = {0, 1, 2, 8, 19, 21, 22, 30, 150};
std::vector<size_t> colors = {SK_ColorBLUE, SK_ColorCYAN, SK_ColorLTGRAY, SK_ColorGREEN,
SK_ColorRED, SK_ColorWHITE, SK_ColorYELLOW, SK_ColorMAGENTA};
RectHeightStyle rect_height_style = RectHeightStyle::kTight;
RectWidthStyle rect_width_style = RectWidthStyle::kTight;
for (size_t i = 0; i < sizes.size() - 1; ++i) {
size_t from = (i == 0 ? 0 : 1) + sizes[i];
size_t to = sizes[i + 1];
auto boxes = paragraph->getRectsForRange(from, to, rect_height_style, rect_width_style);
if (boxes.empty()) {
continue;
}
for (auto& box : boxes) {
SkPaint paint;
paint.setColor(colors[i % colors.size()]);
paint.setShader(setgrad(box.rect, colors[i % colors.size()], SK_ColorWHITE));
canvas->drawRect(box.rect, paint);
}
}
paragraph->paint(canvas, 0, 0);
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
auto h = this->height();
auto w = this->width();
drawText(canvas, SK_ColorGRAY, w, h);
}
private:
typedef Sample INHERITED;
SkScalar letterSpacing;
SkScalar wordSpacing;
};
class ParagraphView10 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph10");
return true;
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
const char* text = "English English 字典 字典 😀😃😄 😀😃😄";
ParagraphStyle paragraph_style;
paragraph_style.turnHintingOff();
ParagraphBuilderImpl builder(paragraph_style, sk_make_sp<TestFontCollection>());
TextStyle text_style;
text_style.setFontFamilies({SkString("Roboto"), SkString("Noto Color Emoji"),
SkString("Source Han Serif CN")});
text_style.setColor(SK_ColorRED);
text_style.setFontSize(60);
text_style.setLetterSpacing(0);
text_style.setWordSpacing(0);
text_style.setColor(SK_ColorBLACK);
text_style.setHeight(1);
builder.pushStyle(text_style);
builder.addText(text);
builder.pop();
auto paragraph = builder.Build();
paragraph->layout(width());
paragraph->paint(canvas, 0, 0);
SkDEBUGCODE(auto impl = reinterpret_cast<ParagraphImpl*>(paragraph.get()));
SkASSERT(impl->runs().size() == 3);
SkASSERT(impl->runs()[0].text().end() == impl->runs()[1].text().begin());
SkASSERT(impl->runs()[1].text().end() == impl->runs()[2].text().begin());
}
private:
typedef Sample INHERITED;
};
class ParagraphView11 : public Sample {
protected:
bool onQuery(Sample::Event* evt) override {
if (Sample::TitleQ(*evt)) {
Sample::TitleR(evt, "Paragraph11");
return true;
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
const char* text =
"😀😃😄😁😆😅😂🤣☺😇🙂😍😡😟😢😻👽💩👍👎🙏👌👋👄👁👦👼👨‍🚀👨‍🚒🙋‍♂️👳👨‍👨‍👧"
"‍"
"👧"
"💼👡👠☂🐶🐰🐻🐼🐷🐒🐵🐔🐧🐦🐋🐟🐡🕸🐌🐴🐊🐄🐪🐘🌸🌏🔥🌟🌚🌝"
"💦"
"💧"
"❄🍕🍔🍟🥝🍱🕶🎩🏈⚽🚴‍♀️🎻🎼🎹🚨🚎🚐⚓🛳🚀🚁🏪🏢🖱⏰📱💾💉📉🛏"
"🔑"
"🔓"
"📁🗓📊❤💯🚫🔻♠♣🕓❗🏳🏁🏳️‍🌈🇮🇹🇱🇷🇺🇸🇬🇧🇨🇳"
"🇧"
"🇴";
text = "🍀\0‬";
text = "qwerty ";
ParagraphStyle paragraph_style;
paragraph_style.turnHintingOff();
ParagraphBuilderImpl builder(paragraph_style, sk_make_sp<FontCollection>());
TextStyle text_style;
text_style.setFontFamilies({SkString("???")});
text_style.setFontStyle(SkFontStyle::Bold());
text_style.setColor(SK_ColorBLACK);
text_style.setFontSize(50);
builder.pushStyle(text_style);
builder.addText(text);
builder.pop();
auto paragraph = builder.Build();
paragraph->layout(1000);
auto result = paragraph->getRectsForRange(6, 10, RectHeightStyle::kTight, RectWidthStyle::kTight);
SkPaint paint;
paint.setColor(SK_ColorLTGRAY);
canvas->drawRect(result[0].rect, paint);
paragraph->paint(canvas, 0, 0);
}
private:
typedef Sample INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE(return new ParagraphView1();)
DEF_SAMPLE(return new ParagraphView2();)
DEF_SAMPLE(return new ParagraphView3();)
DEF_SAMPLE(return new ParagraphView4();)
DEF_SAMPLE(return new ParagraphView5();)
DEF_SAMPLE(return new ParagraphView6();)
DEF_SAMPLE(return new ParagraphView7();)
DEF_SAMPLE(return new ParagraphView8();)
DEF_SAMPLE(return new ParagraphView9();)
DEF_SAMPLE(return new ParagraphView10();)
DEF_SAMPLE(return new ParagraphView11();)
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