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#pragma once
#include <SFML/Graphics/VertexArray.hpp>
#include <SFML/System/String.hpp>
#include <SFML/System/Clock.hpp>
#include <vector>
#include "types.hpp"
#include <assert.h>
namespace sf {
class Font;
class Event;
class RenderTarget;
}
namespace QuickMedia
{
struct StringViewUtf32 {
const u32 *data;
size_t size;
StringViewUtf32() : data(nullptr), size(0) {}
StringViewUtf32(const u32 *data, usize size) : data(data), size(size) {}
size_t find(const StringViewUtf32 &other, size_t offset = 0) const;
u32 operator [] (usize index) const {
assert(index < size);
return data[index];
}
};
struct TextElement
{
enum class Type
{
TEXT
};
enum class TextType {
LATIN,
CJK,
EMOJI
};
TextElement() {}
TextElement(const StringViewUtf32 &_text, Type _type) : text(_text), type(_type), text_type(TextType::LATIN) {}
StringViewUtf32 text;
sf::Vector2f position;
Type type;
//bool ownLine; // Currently only used for emoji, to make emoji bigger when it's the only thing on a line
TextType text_type;
};
struct VertexRef {
int vertices_index; // index to |vertices| VertexArray
int index; // index within vertices[vertices_index]
int line;
sf::Uint32 codepoint;
};
class Text
{
public:
Text(bool bold_font);
Text(sf::String str, bool bold_font, unsigned int characterSize, float maxWidth);
void setString(sf::String str);
const sf::String& getString() const;
void appendText(sf::String str);
void setPosition(float x, float y);
void setPosition(const sf::Vector2f &position);
sf::Vector2f getPosition() const;
void setMaxWidth(float maxWidth);
float getMaxWidth() const;
void setCharacterSize(unsigned int characterSize);
unsigned int getCharacterSize() const;
void setFillColor(sf::Color color);
void setLineSpacing(float lineSpacing);
void setCharacterSpacing(float characterSpacing);
void setEditable(bool editable);
bool isEditable() const;
// Note: only call after initial updateGeometry or draw. TODO: Automatically do this internally
void moveCaretToEnd();
// Note: won't update until @draw is called
float getWidth() const;
// Note: won't update until @draw is called
float getHeight() const;
void processEvent(const sf::Event &event);
// Performs culling. @updateGeometry is called even if text is not visible if text is dirty, because updateGeometry might change the dimension of the text and make is visible.
// Returns true if text was drawn on screen (if text is within window borders)
bool draw(sf::RenderTarget &target);
void updateGeometry(bool update_even_if_not_dirty = false);
private:
enum class CaretMoveDirection : u8
{
NONE,
UP,
DOWN,
HOME,
END,
LEFT,
RIGHT,
LEFT_WORD,
RIGHT_WORD
};
void updateCaret();
int getStartOfLine(int startIndex) const;
int getEndOfLine(int startIndex) const;
int getStartOfWord(int startIndex) const;
int getEndOfWord(int startIndex) const;
int getPreviousLineClosestPosition(int startIndex) const;
int getNextLineClosestPosition(int startIndex) const;
void splitTextByFont();
float get_text_quad_left_side(const VertexRef &vertex_ref) const;
float get_text_quad_right_side(const VertexRef &vertex_ref) const;
// If the index is past the end, then the caret offset is the right side of the last character, rather than the left side
float get_caret_offset_by_caret_index(int index) const;
VertexRef& get_vertex_ref_clamp(int index);
// Takes into consideration if index is the last vertex and the last vertex is a newline, then it should be on its own line
int get_vertex_line(int index) const;
sf::Uint32 get_vertex_codepoint(int index) const;
private:
sf::String str; // TODO: Remove this for non-editable text??? also replace with std::string? then we get more efficient editing of text
const bool bold_font;
unsigned int characterSize;
sf::VertexArray vertices[3];
float maxWidth;
sf::Vector2f position;
sf::Color color;
sf::Color urlColor;
bool dirty;
bool dirtyText;
bool dirtyCaret;
bool editable;
CaretMoveDirection caretMoveDirection;
sf::FloatRect boundingBox;
int num_lines;
float lineSpacing;
float characterSpacing;
std::vector<TextElement> textElements;
int caretIndex;
float caret_offset_x;
sf::Vector2f caretPosition;
sf::Vector2u renderTargetSize;
std::vector<VertexRef> vertices_linear; // TODO: Use textElements instead
};
}
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