gfx_layout.cpp File Reference

Handling of laying out text. More...

#include "stdafx.h"
#include "core/math_func.hpp"
#include "gfx_layout.h"
#include "string_func.h"
#include "strings_func.h"
#include "debug.h"
#include "table/control_codes.h"
#include "gfx_layout_fallback.h"
#include "gfx_layout_icu.h"
#include "safeguards.h"

Go to the source code of this file.

Functions
template<typename T >
static void	GetLayouter (Layouter::LineCacheItem &line, std::string_view str, FontState &state)
	Helper for getting a ParagraphLayouter of the given type. More...
static bool	IsConsumedFormattingCode (char32_t ch)
	Test whether a character is a non-printable formatting code.
ParagraphLayouter::Position	GetCharPosInString (std::string_view str, const char *ch, FontSize start_fontsize)
	Get the leading corner of a character in a single-line string relative to the start of the string. More...
ptrdiff_t	GetCharAtPosition (std::string_view str, int x, FontSize start_fontsize)
	Get the character from a string that is drawn at a specific position. More...

Detailed Description

Handling of laying out text.

Definition in file gfx_layout.cpp.

Function Documentation

GetCharAtPosition()

ptrdiff_t GetCharAtPosition	(	std::string_view	str,
		int	x,
		FontSize	start_fontsize
	)

Get the character from a string that is drawn at a specific position.

Parameters

str	String to test.
x	Position relative to the start of the string.
start_fontsize	Font size to start the text with.

Returns

Index of the character position or -1 if there is no character at the position.

Definition at line 438 of file gfx_layout.cpp.

GetCharPosInString()

ParagraphLayouter::Position GetCharPosInString	(	std::string_view	str,
		const char *	ch,
		FontSize	start_fontsize
	)

Get the leading corner of a character in a single-line string relative to the start of the string.

Parameters

str	String containing the character.
ch	Pointer to the character in the string.
start_fontsize	Font size to start the text with.

Returns

Upper left corner of the glyph associated with the character.

Definition at line 421 of file gfx_layout.cpp.

References Layouter::GetCharPosition().

Referenced by Textbuf::UpdateCaretPosition(), and Textbuf::UpdateMarkedText().

GetLayouter()

template<typename T >

static void GetLayouter ( Layouter::LineCacheItem &  line, std::string_view  str, FontState &  state  )

inlinestatic

Helper for getting a ParagraphLayouter of the given type.

Note

In case no ParagraphLayouter could be constructed, line.layout will be nullptr.

Parameters

line	The cache item to store our layouter in.
str	The string to create a layouter for.
state	The state of the font and color.

Template Parameters

T	The type of layouter we want.

Definition at line 64 of file gfx_layout.cpp.

References Layouter::LineCacheItem::buffer, FontState::cur_colour, FontState::fontsize, free(), Layouter::GetFont(), and Layouter::LineCacheItem::runs.