916a904fb7
Change-Id: I4e87a6927cbd6ef087b72aaa4b2155c1859589b3 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/235677 Reviewed-by: Ben Wagner <bungeman@google.com> Commit-Queue: Julia Lavrova <jlavrova@google.com>
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
// Copyright 2019 Google LLC.
|
|
#ifndef ParagraphBuilderImpl_DEFINED
|
|
#define ParagraphBuilderImpl_DEFINED
|
|
|
|
#include <memory>
|
|
#include <stack>
|
|
#include <string>
|
|
#include <tuple>
|
|
#include "modules/skparagraph/include/FontCollection.h"
|
|
#include "modules/skparagraph/include/Paragraph.h"
|
|
#include "modules/skparagraph/include/ParagraphBuilder.h"
|
|
#include "modules/skparagraph/include/ParagraphStyle.h"
|
|
#include "modules/skparagraph/include/TextStyle.h"
|
|
|
|
namespace skia {
|
|
namespace textlayout {
|
|
|
|
class ParagraphBuilderImpl : public ParagraphBuilder {
|
|
public:
|
|
ParagraphBuilderImpl(const ParagraphStyle& style, sk_sp<FontCollection> fontCollection);
|
|
|
|
~ParagraphBuilderImpl() override;
|
|
|
|
// Push a style to the stack. The corresponding text added with AddText will
|
|
// use the top-most style.
|
|
void pushStyle(const TextStyle& style) override;
|
|
|
|
// Remove a style from the stack. Useful to apply different styles to chunks
|
|
// of text such as bolding.
|
|
// Example:
|
|
// builder.PushStyle(normal_style);
|
|
// builder.AddText("Hello this is normal. ");
|
|
//
|
|
// builder.PushStyle(bold_style);
|
|
// builder.AddText("And this is BOLD. ");
|
|
//
|
|
// builder.Pop();
|
|
// builder.AddText(" Back to normal again.");
|
|
void pop() override;
|
|
|
|
TextStyle peekStyle() override;
|
|
|
|
// Adds text to the builder. Forms the proper runs to use the upper-most style
|
|
// on the style_stack_;
|
|
void addText(const std::u16string& text) override;
|
|
|
|
// Converts to u16string before adding.
|
|
void addText(const char* text) override;
|
|
|
|
void addPlaceholder(const PlaceholderStyle& placeholderStyle) override;
|
|
|
|
void setParagraphStyle(const ParagraphStyle& style) override;
|
|
|
|
// Constructs a SkParagraph object that can be used to layout and paint the text to a SkCanvas.
|
|
std::unique_ptr<Paragraph> Build() override;
|
|
|
|
private:
|
|
void endRunIfNeeded();
|
|
void addPlaceholder(const PlaceholderStyle& placeholderStyle, bool lastOne);
|
|
|
|
SkString fUtf8;
|
|
std::stack<TextStyle> fTextStyles;
|
|
SkTArray<Block, true> fStyledBlocks;
|
|
SkTArray<Placeholder, true> fPlaceholders;
|
|
sk_sp<FontCollection> fFontCollection;
|
|
ParagraphStyle fParagraphStyle;
|
|
};
|
|
} // namespace textlayout
|
|
} // namespace skia
|
|
|
|
#endif // ParagraphBuilderImpl_DEFINED
|