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5d238468ea
godot/servers/text_server.h
bruvzg baec983d8a
[TextServer] Improvements for line breaking, "Fill" alignment, overrun, and interaction between these modes. 
Fix "Fill" alignment processing wrong side of the text if overrun trim was applied.
Improve "Fill" alignment to avoid adding excessive subsequent spaces or elongations.
Add font detection to the overrun, to correctly add ellipsis (was using last glyph font, which doesn't necessary have dot character).
Improve line breaking to avoid adding excessive subsequent soft break points for languages without word separator.
Port missing overrun/justification code to the Fallback text server.
Fix inferred text direction detection by controls.
Add tests for "Fill" alignment and line breaking glyph flags.
2022-01-13 08:53:28 +02:00

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/*************************************************************************/
/* text_server.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef TEXT_SERVER_H
#define TEXT_SERVER_H
#include "core/object/ref_counted.h"
#include "core/os/os.h"
#include "core/templates/rid.h"
#include "core/variant/native_ptr.h"
#include "core/variant/variant.h"
struct Glyph;
struct CaretInfo;
class TextServer : public RefCounted {
GDCLASS(TextServer, RefCounted);
public:
enum Direction {
DIRECTION_AUTO,
DIRECTION_LTR,
DIRECTION_RTL
};
enum Orientation {
ORIENTATION_HORIZONTAL,
ORIENTATION_VERTICAL
};
enum JustificationFlag {
JUSTIFICATION_NONE = 0,
JUSTIFICATION_KASHIDA = 1 << 0,
JUSTIFICATION_WORD_BOUND = 1 << 1,
JUSTIFICATION_TRIM_EDGE_SPACES = 1 << 2,
JUSTIFICATION_AFTER_LAST_TAB = 1 << 3,
JUSTIFICATION_CONSTRAIN_ELLIPSIS = 1 << 4,
};
enum LineBreakFlag { // LineBreakFlag can be passed in the same value as the JustificationFlag, do not use the same values.
BREAK_NONE = 0,
BREAK_MANDATORY = 1 << 5,
BREAK_WORD_BOUND = 1 << 6,
BREAK_GRAPHEME_BOUND = 1 << 7,
BREAK_WORD_BOUND_ADAPTIVE = 1 << 6 | 1 << 8,
};
enum TextOverrunFlag {
OVERRUN_NO_TRIMMING = 0,
OVERRUN_TRIM = 1 << 0,
OVERRUN_TRIM_WORD_ONLY = 1 << 1,
OVERRUN_ADD_ELLIPSIS = 1 << 2,
OVERRUN_ENFORCE_ELLIPSIS = 1 << 3,
OVERRUN_JUSTIFICATION_AWARE = 1 << 4,
};
enum GraphemeFlag {
GRAPHEME_IS_VALID = 1 << 0, // Glyph is valid.
GRAPHEME_IS_RTL = 1 << 1, // Glyph is right-to-left.
GRAPHEME_IS_VIRTUAL = 1 << 2, // Glyph is not part of source string (added by fit_to_width function, do not affect caret movement).
GRAPHEME_IS_SPACE = 1 << 3, // Is whitespace (for justification and word breaks).
GRAPHEME_IS_BREAK_HARD = 1 << 4, // Is line break (mandatory break, e.g. "\n").
GRAPHEME_IS_BREAK_SOFT = 1 << 5, // Is line break (optional break, e.g. space).
GRAPHEME_IS_TAB = 1 << 6, // Is tab or vertical tab.
GRAPHEME_IS_ELONGATION = 1 << 7, // Elongation (e.g. kashida), glyph can be duplicated or truncated to fit line to width.
GRAPHEME_IS_PUNCTUATION = 1 << 8, // Punctuation, except underscore (can be used as word break, but not line break or justifiction).
GRAPHEME_IS_UNDERSCORE = 1 << 9, // Underscore (can be used as word break).
GRAPHEME_IS_CONNECTED = 1 << 10, // Connected to previous grapheme.
};
enum Hinting {
HINTING_NONE,
HINTING_LIGHT,
HINTING_NORMAL
};
enum Feature {
FEATURE_BIDI_LAYOUT = 1 << 0,
FEATURE_VERTICAL_LAYOUT = 1 << 1,
FEATURE_SHAPING = 1 << 2,
FEATURE_KASHIDA_JUSTIFICATION = 1 << 3,
FEATURE_BREAK_ITERATORS = 1 << 4,
FEATURE_FONT_SYSTEM = 1 << 5,
FEATURE_FONT_VARIABLE = 1 << 6,
FEATURE_USE_SUPPORT_DATA = 1 << 7
};
enum ContourPointTag {
CONTOUR_CURVE_TAG_ON = 0x01,
CONTOUR_CURVE_TAG_OFF_CONIC = 0x00,
CONTOUR_CURVE_TAG_OFF_CUBIC = 0x02
};
enum SpacingType {
SPACING_GLYPH,
SPACING_SPACE,
SPACING_TOP,
SPACING_BOTTOM,
};
enum FontStyle {
FONT_BOLD = 1 << 0,
FONT_ITALIC = 1 << 1,
FONT_FIXED_WIDTH = 1 << 2,
};
void _draw_hex_code_box_number(RID p_canvas, int p_size, const Vector2 &p_pos, uint8_t p_index, const Color &p_color) const;
protected:
struct TrimData {
int trim_pos = -1;
int ellipsis_pos = -1;
Vector<Glyph> ellipsis_glyph_buf;
};
struct ShapedTextData {
Mutex mutex;
/* Source data */
RID parent; // Substring parent ShapedTextData.
int start = 0; // Substring start offset in the parent string.
int end = 0; // Substring end offset in the parent string.
String text;
String custom_punct;
TextServer::Direction direction = DIRECTION_LTR; // Desired text direction.
TextServer::Orientation orientation = ORIENTATION_HORIZONTAL;
struct Span {
int start = -1;
int end = -1;
Vector<RID> fonts;
int font_size = 0;
Variant embedded_key;
String language;
Dictionary features;
};
Vector<Span> spans;
struct EmbeddedObject {
int pos = 0;
InlineAlignment inline_align = INLINE_ALIGNMENT_CENTER;
Rect2 rect;
};
Map<Variant, EmbeddedObject> objects;
/* Shaped data */
TextServer::Direction para_direction = DIRECTION_LTR; // Detected text direction.
bool valid = false; // String is shaped.
bool line_breaks_valid = false; // Line and word break flags are populated (and virtual zero width spaces inserted).
bool justification_ops_valid = false; // Virtual elongation glyphs are added to the string.
bool sort_valid = false;
bool text_trimmed = false;
bool preserve_invalid = true; // Draw hex code box instead of missing characters.
bool preserve_control = false; // Draw control characters.
float ascent = 0.f; // Ascent for horizontal layout, 1/2 of width for vertical.
float descent = 0.f; // Descent for horizontal layout, 1/2 of width for vertical.
float width = 0.f; // Width for horizontal layout, height for vertical.
float width_trimmed = 0.f;
float upos = 0.f;
float uthk = 0.f;
TrimData overrun_trim_data;
bool fit_width_minimum_reached = false;
Vector<Glyph> glyphs;
Vector<Glyph> glyphs_logical;
};
Map<char32_t, char32_t> diacritics_map;
void _diacritics_map_add(const String &p_from, char32_t p_to);
void _init_diacritics_map();
static void _bind_methods();
public:
virtual bool has_feature(Feature p_feature) const = 0;
virtual String get_name() const = 0;
virtual uint32_t get_features() const = 0;
virtual void free(RID p_rid) = 0;
virtual bool has(RID p_rid) = 0;
virtual bool load_support_data(const String &p_filename) = 0;
virtual String get_support_data_filename() const = 0;
virtual String get_support_data_info() const = 0;
virtual bool save_support_data(const String &p_filename) const = 0;
virtual bool is_locale_right_to_left(const String &p_locale) const = 0;
virtual int32_t name_to_tag(const String &p_name) const { return 0; };
virtual String tag_to_name(int32_t p_tag) const { return ""; };
/* Font interface */
virtual RID create_font() = 0;
virtual void font_set_data(RID p_font_rid, const PackedByteArray &p_data) = 0;
virtual void font_set_data_ptr(RID p_font_rid, const uint8_t *p_data_ptr, size_t p_data_size) = 0;
virtual void font_set_style(RID p_font_rid, uint32_t /*FontStyle*/ p_style) = 0;
virtual uint32_t /*FontStyle*/ font_get_style(RID p_font_rid) const = 0;
virtual void font_set_name(RID p_font_rid, const String &p_name) = 0;
virtual String font_get_name(RID p_font_rid) const = 0;
virtual void font_set_style_name(RID p_font_rid, const String &p_name) = 0;
virtual String font_get_style_name(RID p_font_rid) const = 0;
virtual void font_set_antialiased(RID p_font_rid, bool p_antialiased) = 0;
virtual bool font_is_antialiased(RID p_font_rid) const = 0;
virtual void font_set_multichannel_signed_distance_field(RID p_font_rid, bool p_msdf) = 0;
virtual bool font_is_multichannel_signed_distance_field(RID p_font_rid) const = 0;
virtual void font_set_msdf_pixel_range(RID p_font_rid, int p_msdf_pixel_range) = 0;
virtual int font_get_msdf_pixel_range(RID p_font_rid) const = 0;
virtual void font_set_msdf_size(RID p_font_rid, int p_msdf_size) = 0;
virtual int font_get_msdf_size(RID p_font_rid) const = 0;
virtual void font_set_fixed_size(RID p_font_rid, int p_fixed_size) = 0;
virtual int font_get_fixed_size(RID p_font_rid) const = 0;
virtual void font_set_force_autohinter(RID p_font_rid, bool p_force_autohinter) = 0;
virtual bool font_is_force_autohinter(RID p_font_rid) const = 0;
virtual void font_set_hinting(RID p_font_rid, Hinting p_hinting) = 0;
virtual Hinting font_get_hinting(RID p_font_rid) const = 0;
virtual void font_set_variation_coordinates(RID p_font_rid, const Dictionary &p_variation_coordinates) = 0;
virtual Dictionary font_get_variation_coordinates(RID p_font_rid) const = 0;
virtual void font_set_oversampling(RID p_font_rid, float p_oversampling) = 0;
virtual float font_get_oversampling(RID p_font_rid) const = 0;
virtual Array font_get_size_cache_list(RID p_font_rid) const = 0;
virtual void font_clear_size_cache(RID p_font_rid) = 0;
virtual void font_remove_size_cache(RID p_font_rid, const Vector2i &p_size) = 0;
virtual void font_set_ascent(RID p_font_rid, int p_size, float p_ascent) = 0;
virtual float font_get_ascent(RID p_font_rid, int p_size) const = 0;
virtual void font_set_descent(RID p_font_rid, int p_size, float p_descent) = 0;
virtual float font_get_descent(RID p_font_rid, int p_size) const = 0;
virtual void font_set_underline_position(RID p_font_rid, int p_size, float p_underline_position) = 0;
virtual float font_get_underline_position(RID p_font_rid, int p_size) const = 0;
virtual void font_set_underline_thickness(RID p_font_rid, int p_size, float p_underline_thickness) = 0;
virtual float font_get_underline_thickness(RID p_font_rid, int p_size) const = 0;
virtual void font_set_scale(RID p_font_rid, int p_size, float p_scale) = 0;
virtual float font_get_scale(RID p_font_rid, int p_size) const = 0;
virtual void font_set_spacing(RID p_font_rid, int p_size, SpacingType p_spacing, int p_value) = 0;
virtual int font_get_spacing(RID p_font_rid, int p_size, SpacingType p_spacing) const = 0;
virtual int font_get_texture_count(RID p_font_rid, const Vector2i &p_size) const = 0;
virtual void font_clear_textures(RID p_font_rid, const Vector2i &p_size) = 0;
virtual void font_remove_texture(RID p_font_rid, const Vector2i &p_size, int p_texture_index) = 0;
virtual void font_set_texture_image(RID p_font_rid, const Vector2i &p_size, int p_texture_index, const Ref<Image> &p_image) = 0;
virtual Ref<Image> font_get_texture_image(RID p_font_rid, const Vector2i &p_size, int p_texture_index) const = 0;
virtual void font_set_texture_offsets(RID p_font_rid, const Vector2i &p_size, int p_texture_index, const PackedInt32Array &p_offset) = 0;
virtual PackedInt32Array font_get_texture_offsets(RID p_font_rid, const Vector2i &p_size, int p_texture_index) const = 0;
virtual Array font_get_glyph_list(RID p_font_rid, const Vector2i &p_size) const = 0;
virtual void font_clear_glyphs(RID p_font_rid, const Vector2i &p_size) = 0;
virtual void font_remove_glyph(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) = 0;
virtual Vector2 font_get_glyph_advance(RID p_font_rid, int p_size, int32_t p_glyph) const = 0;
virtual void font_set_glyph_advance(RID p_font_rid, int p_size, int32_t p_glyph, const Vector2 &p_advance) = 0;
virtual Vector2 font_get_glyph_offset(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) const = 0;
virtual void font_set_glyph_offset(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph, const Vector2 &p_offset) = 0;
virtual Vector2 font_get_glyph_size(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) const = 0;
virtual void font_set_glyph_size(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph, const Vector2 &p_gl_size) = 0;
virtual Rect2 font_get_glyph_uv_rect(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) const = 0;
virtual void font_set_glyph_uv_rect(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph, const Rect2 &p_uv_rect) = 0;
virtual int font_get_glyph_texture_idx(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) const = 0;
virtual void font_set_glyph_texture_idx(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph, int p_texture_idx) = 0;
virtual Dictionary font_get_glyph_contours(RID p_font, int p_size, int32_t p_index) const = 0;
virtual Array font_get_kerning_list(RID p_font_rid, int p_size) const = 0;
virtual void font_clear_kerning_map(RID p_font_rid, int p_size) = 0;
virtual void font_remove_kerning(RID p_font_rid, int p_size, const Vector2i &p_glyph_pair) = 0;
virtual void font_set_kerning(RID p_font_rid, int p_size, const Vector2i &p_glyph_pair, const Vector2 &p_kerning) = 0;
virtual Vector2 font_get_kerning(RID p_font_rid, int p_size, const Vector2i &p_glyph_pair) const = 0;
virtual int32_t font_get_glyph_index(RID p_font_rid, int p_size, char32_t p_char, char32_t p_variation_selector) const = 0;
virtual bool font_has_char(RID p_font_rid, char32_t p_char) const = 0;
virtual String font_get_supported_chars(RID p_font_rid) const = 0;
virtual void font_render_range(RID p_font, const Vector2i &p_size, char32_t p_start, char32_t p_end) = 0;
virtual void font_render_glyph(RID p_font_rid, const Vector2i &p_size, int32_t p_index) = 0;
virtual void font_draw_glyph(RID p_font, RID p_canvas, int p_size, const Vector2 &p_pos, int32_t p_index, const Color &p_color = Color(1, 1, 1)) const = 0;
virtual void font_draw_glyph_outline(RID p_font, RID p_canvas, int p_size, int p_outline_size, const Vector2 &p_pos, int32_t p_index, const Color &p_color = Color(1, 1, 1)) const = 0;
virtual bool font_is_language_supported(RID p_font_rid, const String &p_language) const = 0;
virtual void font_set_language_support_override(RID p_font_rid, const String &p_language, bool p_supported) = 0;
virtual bool font_get_language_support_override(RID p_font_rid, const String &p_language) = 0;
virtual void font_remove_language_support_override(RID p_font_rid, const String &p_language) = 0;
virtual Vector<String> font_get_language_support_overrides(RID p_font_rid) = 0;
virtual bool font_is_script_supported(RID p_font_rid, const String &p_script) const = 0;
virtual void font_set_script_support_override(RID p_font_rid, const String &p_script, bool p_supported) = 0;
virtual bool font_get_script_support_override(RID p_font_rid, const String &p_script) = 0;
virtual void font_remove_script_support_override(RID p_font_rid, const String &p_script) = 0;
virtual Vector<String> font_get_script_support_overrides(RID p_font_rid) = 0;
virtual void font_set_opentype_feature_overrides(RID p_font_rid, const Dictionary &p_overrides) = 0;
virtual Dictionary font_get_opentype_feature_overrides(RID p_font_rid) const = 0;
virtual Dictionary font_supported_feature_list(RID p_font_rid) const = 0;
virtual Dictionary font_supported_variation_list(RID p_font_rid) const = 0;
virtual float font_get_global_oversampling() const = 0;
virtual void font_set_global_oversampling(float p_oversampling) = 0;
virtual Vector2 get_hex_code_box_size(int p_size, char32_t p_index) const;
virtual void draw_hex_code_box(RID p_canvas, int p_size, const Vector2 &p_pos, char32_t p_index, const Color &p_color) const;
/* Shaped text buffer interface */
virtual RID create_shaped_text(Direction p_direction = DIRECTION_AUTO, Orientation p_orientation = ORIENTATION_HORIZONTAL) = 0;
virtual void shaped_text_clear(RID p_shaped) = 0;
virtual void shaped_text_set_direction(RID p_shaped, Direction p_direction = DIRECTION_AUTO) = 0;
virtual Direction shaped_text_get_direction(RID p_shaped) const = 0;
virtual Direction shaped_text_get_inferred_direction(RID p_shaped) const = 0;
virtual void shaped_text_set_bidi_override(RID p_shaped, const Array &p_override) = 0;
virtual void shaped_text_set_custom_punctuation(RID p_shaped, const String &p_punct) = 0;
virtual String shaped_text_get_custom_punctuation(RID p_shaped) const = 0;
virtual void shaped_text_set_orientation(RID p_shaped, Orientation p_orientation = ORIENTATION_HORIZONTAL) = 0;
virtual Orientation shaped_text_get_orientation(RID p_shaped) const = 0;
virtual void shaped_text_set_preserve_invalid(RID p_shaped, bool p_enabled) = 0;
virtual bool shaped_text_get_preserve_invalid(RID p_shaped) const = 0;
virtual void shaped_text_set_preserve_control(RID p_shaped, bool p_enabled) = 0;
virtual bool shaped_text_get_preserve_control(RID p_shaped) const = 0;
virtual bool shaped_text_add_string(RID p_shaped, const String &p_text, const Vector<RID> &p_fonts, int p_size, const Dictionary &p_opentype_features = Dictionary(), const String &p_language = "") = 0;
virtual bool shaped_text_add_object(RID p_shaped, Variant p_key, const Size2 &p_size, InlineAlignment p_inline_align = INLINE_ALIGNMENT_CENTER, int p_length = 1) = 0;
virtual bool shaped_text_resize_object(RID p_shaped, Variant p_key, const Size2 &p_size, InlineAlignment p_inline_align = INLINE_ALIGNMENT_CENTER) = 0;
virtual RID shaped_text_substr(RID p_shaped, int p_start, int p_length) const = 0; // Copy shaped substring (e.g. line break) without reshaping, but correctly reordered, preservers range.
virtual RID shaped_text_get_parent(RID p_shaped) const = 0;
virtual float shaped_text_fit_to_width(RID p_shaped, float p_width, uint16_t /*JustificationFlag*/ p_jst_flags = JUSTIFICATION_WORD_BOUND | JUSTIFICATION_KASHIDA) = 0;
virtual float shaped_text_tab_align(RID p_shaped, const PackedFloat32Array &p_tab_stops) = 0;
virtual bool shaped_text_shape(RID p_shaped) = 0;
virtual bool shaped_text_update_breaks(RID p_shaped) = 0;
virtual bool shaped_text_update_justification_ops(RID p_shaped) = 0;
virtual bool shaped_text_is_ready(RID p_shaped) const = 0;
virtual const Glyph *shaped_text_get_glyphs(RID p_shaped) const = 0;
Array _shaped_text_get_glyphs_wrapper(RID p_shaped) const;
virtual const Glyph *shaped_text_sort_logical(RID p_shaped) = 0;
Array _shaped_text_sort_logical_wrapper(RID p_shaped);
virtual int shaped_text_get_glyph_count(RID p_shaped) const = 0;
virtual Vector2i shaped_text_get_range(RID p_shaped) const = 0;
virtual PackedInt32Array shaped_text_get_line_breaks_adv(RID p_shaped, const PackedFloat32Array &p_width, int p_start = 0, bool p_once = true, uint16_t /*TextBreakFlag*/ p_break_flags = BREAK_MANDATORY | BREAK_WORD_BOUND) const;
virtual PackedInt32Array shaped_text_get_line_breaks(RID p_shaped, float p_width, int p_start = 0, uint16_t /*TextBreakFlag*/ p_break_flags = BREAK_MANDATORY | BREAK_WORD_BOUND) const;
virtual PackedInt32Array shaped_text_get_word_breaks(RID p_shaped, int p_grapheme_flags = GRAPHEME_IS_SPACE | GRAPHEME_IS_PUNCTUATION) const;
virtual int shaped_text_get_trim_pos(RID p_shaped) const = 0;
virtual int shaped_text_get_ellipsis_pos(RID p_shaped) const = 0;
virtual const Glyph *shaped_text_get_ellipsis_glyphs(RID p_shaped) const = 0;
Array _shaped_text_get_ellipsis_glyphs_wrapper(RID p_shaped) const;
virtual int shaped_text_get_ellipsis_glyph_count(RID p_shaped) const = 0;
virtual void shaped_text_overrun_trim_to_width(RID p_shaped, float p_width, uint16_t p_trim_flags) = 0;
virtual Array shaped_text_get_objects(RID p_shaped) const = 0;
virtual Rect2 shaped_text_get_object_rect(RID p_shaped, Variant p_key) const = 0;
virtual Size2 shaped_text_get_size(RID p_shaped) const = 0;
virtual float shaped_text_get_ascent(RID p_shaped) const = 0;
virtual float shaped_text_get_descent(RID p_shaped) const = 0;
virtual float shaped_text_get_width(RID p_shaped) const = 0;
virtual float shaped_text_get_underline_position(RID p_shaped) const = 0;
virtual float shaped_text_get_underline_thickness(RID p_shaped) const = 0;
virtual Direction shaped_text_get_dominant_direction_in_range(RID p_shaped, int p_start, int p_end) const;
virtual CaretInfo shaped_text_get_carets(RID p_shaped, int p_position) const;
Dictionary _shaped_text_get_carets_wrapper(RID p_shaped, int p_position) const;
virtual Vector<Vector2> shaped_text_get_selection(RID p_shaped, int p_start, int p_end) const;
virtual int shaped_text_hit_test_grapheme(RID p_shaped, float p_coords) const; // Return grapheme index.
virtual int shaped_text_hit_test_position(RID p_shaped, float p_coords) const; // Return caret/selection position.
virtual Vector2 shaped_text_get_grapheme_bounds(RID p_shaped, int p_pos) const;
virtual int shaped_text_next_grapheme_pos(RID p_shaped, int p_pos) const;
virtual int shaped_text_prev_grapheme_pos(RID p_shaped, int p_pos) const;
// The pen position is always placed on the baseline and moveing left to right.
virtual void shaped_text_draw(RID p_shaped, RID p_canvas, const Vector2 &p_pos, float p_clip_l = -1.f, float p_clip_r = -1.f, const Color &p_color = Color(1, 1, 1)) const;
virtual void shaped_text_draw_outline(RID p_shaped, RID p_canvas, const Vector2 &p_pos, float p_clip_l = -1.f, float p_clip_r = -1.f, int p_outline_size = 1, const Color &p_color = Color(1, 1, 1)) const;
// Number conversion.
virtual String format_number(const String &p_string, const String &p_language = "") const { return p_string; };
virtual String parse_number(const String &p_string, const String &p_language = "") const { return p_string; };
virtual String percent_sign(const String &p_language = "") const { return "%"; };
virtual String strip_diacritics(const String &p_string) const;
TextServer();
~TextServer();
};
/*************************************************************************/
struct Glyph {
int start = -1; // Start offset in the source string.
int end = -1; // End offset in the source string.
uint8_t count = 0; // Number of glyphs in the grapheme, set in the first glyph only.
uint8_t repeat = 1; // Draw multiple times in the row.
uint16_t flags = 0; // Grapheme flags (valid, rtl, virtual), set in the first glyph only.
float x_off = 0.f; // Offset from the origin of the glyph on baseline.
float y_off = 0.f;
float advance = 0.f; // Advance to the next glyph along baseline(x for horizontal layout, y for vertical).
RID font_rid; // Font resource.
int font_size = 0; // Font size;
int32_t index = 0; // Glyph index (font specific) or UTF-32 codepoint (for the invalid glyphs).
bool operator==(const Glyph &p_a) const;
bool operator!=(const Glyph &p_a) const;
bool operator<(const Glyph &p_a) const;
bool operator>(const Glyph &p_a) const;
};
struct CaretInfo {
Rect2 l_caret;
Rect2 t_caret;
TextServer::Direction l_dir;
TextServer::Direction t_dir;
};
struct GlyphCompare { // For line breaking reordering.
_FORCE_INLINE_ bool operator()(const Glyph &l, const Glyph &r) const {
if (l.start == r.start) {
if (l.count == r.count) {
if ((l.flags & TextServer::GRAPHEME_IS_VIRTUAL) == TextServer::GRAPHEME_IS_VIRTUAL) {
return false;
} else {
return true;
}
}
return l.count > r.count; // Sort first glyph with count & flags, order of the rest are irrelevant.
} else {
return l.start < r.start;
}
}
};
/*************************************************************************/
class TextServerManager : public Object {
GDCLASS(TextServerManager, Object);
protected:
static void _bind_methods();
private:
static TextServerManager *singleton;
Ref<TextServer> primary_interface;
Vector<Ref<TextServer>> interfaces;
public:
_FORCE_INLINE_ static TextServerManager *get_singleton() {
return singleton;
}
void add_interface(const Ref<TextServer> &p_interface);
void remove_interface(const Ref<TextServer> &p_interface);
int get_interface_count() const;
Ref<TextServer> get_interface(int p_index) const;
Ref<TextServer> find_interface(const String &p_name) const;
Array get_interfaces() const;
_FORCE_INLINE_ Ref<TextServer> get_primary_interface() const {
return primary_interface;
}
void set_primary_interface(const Ref<TextServer> &p_primary_interface);
TextServerManager();
~TextServerManager();
};
/*************************************************************************/
#define TS TextServerManager::get_singleton()->get_primary_interface()
VARIANT_ENUM_CAST(TextServer::Direction);
VARIANT_ENUM_CAST(TextServer::Orientation);
VARIANT_ENUM_CAST(TextServer::JustificationFlag);
VARIANT_ENUM_CAST(TextServer::LineBreakFlag);
VARIANT_ENUM_CAST(TextServer::TextOverrunFlag);
VARIANT_ENUM_CAST(TextServer::GraphemeFlag);
VARIANT_ENUM_CAST(TextServer::Hinting);
VARIANT_ENUM_CAST(TextServer::Feature);
VARIANT_ENUM_CAST(TextServer::ContourPointTag);
VARIANT_ENUM_CAST(TextServer::SpacingType);
VARIANT_ENUM_CAST(TextServer::FontStyle);
GDVIRTUAL_NATIVE_PTR(Glyph);
GDVIRTUAL_NATIVE_PTR(Glyph *);
GDVIRTUAL_NATIVE_PTR(CaretInfo);
#endif // TEXT_SERVER_H
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