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godot/scene/gui/rich_text_label.h

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/*************************************************************************/
/* rich_text_label.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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 RICH_TEXT_LABEL_H
#define RICH_TEXT_LABEL_H
#include "rich_text_effect.h"
#include "scene/gui/scroll_bar.h"
#include "scene/resources/text_paragraph.h"
class RichTextLabel : public Control {
GDCLASS(RichTextLabel, Control);
public:
enum Align {
ALIGN_LEFT,
ALIGN_CENTER,
ALIGN_RIGHT,
ALIGN_FILL
};
enum ListType {
LIST_NUMBERS,
LIST_LETTERS,
LIST_ROMAN,
LIST_DOTS
};
enum ItemType {
ITEM_FRAME,
ITEM_TEXT,
ITEM_IMAGE,
ITEM_NEWLINE,
ITEM_FONT,
ITEM_FONT_SIZE,
ITEM_FONT_FEATURES,
ITEM_COLOR,
ITEM_OUTLINE_SIZE,
ITEM_OUTLINE_COLOR,
ITEM_UNDERLINE,
ITEM_STRIKETHROUGH,
ITEM_PARAGRAPH,
ITEM_INDENT,
ITEM_LIST,
ITEM_TABLE,
ITEM_FADE,
ITEM_SHAKE,
ITEM_WAVE,
ITEM_TORNADO,
ITEM_RAINBOW,
ITEM_BGCOLOR,
ITEM_FGCOLOR,
ITEM_META,
ITEM_DROPCAP,
ITEM_CUSTOMFX
};
protected:
void _notification(int p_what);
static void _bind_methods();
private:
struct Item;
struct Line {
Item *from = nullptr;
Ref<TextParagraph> text_buf;
Color dc_color;
int dc_ol_size = 0;
Color dc_ol_color;
Vector2 offset;
int char_offset = 0;
int char_count = 0;
Line() { text_buf.instantiate(); }
};
struct Item {
int index = 0;
int char_ofs = 0;
Item *parent = nullptr;
ItemType type = ITEM_FRAME;
List<Item *> subitems;
List<Item *>::Element *E = nullptr;
int line = 0;
void _clear_children() {
while (subitems.size()) {
memdelete(subitems.front()->get());
subitems.pop_front();
}
}
virtual ~Item() { _clear_children(); }
};
struct ItemFrame : public Item {
bool cell = false;
Vector<Line> lines;
int first_invalid_line = 0;
int first_resized_line = 0;
ItemFrame *parent_frame = nullptr;
Color odd_row_bg = Color(0, 0, 0, 0);
Color even_row_bg = Color(0, 0, 0, 0);
Color border = Color(0, 0, 0, 0);
Size2 min_size_over = Size2(-1, -1);
Size2 max_size_over = Size2(-1, -1);
Rect2 padding;
ItemFrame() { type = ITEM_FRAME; }
};
struct ItemText : public Item {
String text;
ItemText() { type = ITEM_TEXT; }
};
struct ItemDropcap : public Item {
String text;
Ref<Font> font;
int font_size = 0;
Color color;
int ol_size = 0;
Color ol_color;
Rect2 dropcap_margins;
ItemDropcap() { type = ITEM_DROPCAP; }
};
struct ItemImage : public Item {
Ref<Texture2D> image;
InlineAlign inline_align = INLINE_ALIGN_CENTER;
Size2 size;
Color color;
ItemImage() { type = ITEM_IMAGE; }
};
struct ItemFont : public Item {
Ref<Font> font;
ItemFont() { type = ITEM_FONT; }
};
struct ItemFontSize : public Item {
int font_size = 16;
ItemFontSize() { type = ITEM_FONT_SIZE; }
};
struct ItemFontFeatures : public Item {
Dictionary opentype_features;
ItemFontFeatures() { type = ITEM_FONT_FEATURES; }
};
struct ItemColor : public Item {
Color color;
ItemColor() { type = ITEM_COLOR; }
};
struct ItemOutlineSize : public Item {
int outline_size = 0;
ItemOutlineSize() { type = ITEM_OUTLINE_SIZE; }
};
struct ItemOutlineColor : public Item {
Color color;
ItemOutlineColor() { type = ITEM_OUTLINE_COLOR; }
};
struct ItemUnderline : public Item {
ItemUnderline() { type = ITEM_UNDERLINE; }
};
struct ItemStrikethrough : public Item {
ItemStrikethrough() { type = ITEM_STRIKETHROUGH; }
};
struct ItemMeta : public Item {
Variant meta;
ItemMeta() { type = ITEM_META; }
};
struct ItemParagraph : public Item {
Align align = ALIGN_LEFT;
String language;
Control::TextDirection direction = Control::TEXT_DIRECTION_AUTO;
Control::StructuredTextParser st_parser = STRUCTURED_TEXT_DEFAULT;
ItemParagraph() { type = ITEM_PARAGRAPH; }
};
struct ItemIndent : public Item {
int level = 0;
ItemIndent() { type = ITEM_INDENT; }
};
struct ItemList : public Item {
ListType list_type = LIST_DOTS;
bool capitalize = false;
int level = 0;
ItemList() { type = ITEM_LIST; }
};
struct ItemNewline : public Item {
ItemNewline() { type = ITEM_NEWLINE; }
};
struct ItemTable : public Item {
struct Column {
bool expand = false;
int expand_ratio = 0;
int min_width = 0;
int max_width = 0;
int width = 0;
};
Vector<Column> columns;
Vector<float> rows;
int total_width = 0;
int total_height = 0;
InlineAlign inline_align = INLINE_ALIGN_TOP;
ItemTable() { type = ITEM_TABLE; }
};
struct ItemFade : public Item {
int starting_index = 0;
int length = 0;
ItemFade() { type = ITEM_FADE; }
};
struct ItemFX : public Item {
double elapsed_time = 0.f;
};
struct ItemShake : public ItemFX {
int strength = 0;
float rate = 0.0f;
uint64_t _current_rng = 0;
uint64_t _previous_rng = 0;
Vector2 prev_off;
ItemShake() { type = ITEM_SHAKE; }
void reroll_random() {
_previous_rng = _current_rng;
_current_rng = Math::rand();
}
uint64_t offset_random(int index) {
return (_current_rng >> (index % 64)) |
(_current_rng << (64 - (index % 64)));
}
uint64_t offset_previous_random(int index) {
return (_previous_rng >> (index % 64)) |
(_previous_rng << (64 - (index % 64)));
}
};
struct ItemWave : public ItemFX {
float frequency = 1.0f;
float amplitude = 1.0f;
Vector2 prev_off;
ItemWave() { type = ITEM_WAVE; }
};
struct ItemTornado : public ItemFX {
float radius = 1.0f;
float frequency = 1.0f;
Vector2 prev_off;
ItemTornado() { type = ITEM_TORNADO; }
};
struct ItemRainbow : public ItemFX {
float saturation = 0.8f;
float value = 0.8f;
float frequency = 1.0f;
ItemRainbow() { type = ITEM_RAINBOW; }
};
struct ItemBGColor : public Item {
Color color;
ItemBGColor() { type = ITEM_BGCOLOR; }
};
struct ItemFGColor : public Item {
Color color;
ItemFGColor() { type = ITEM_FGCOLOR; }
};
struct ItemCustomFX : public ItemFX {
Ref<CharFXTransform> char_fx_transform;
Ref<RichTextEffect> custom_effect;
ItemCustomFX() {
type = ITEM_CUSTOMFX;
char_fx_transform.instantiate();
}
virtual ~ItemCustomFX() {
_clear_children();
char_fx_transform.unref();
custom_effect.unref();
}
};
ItemFrame *main = nullptr;
Item *current = nullptr;
ItemFrame *current_frame = nullptr;
VScrollBar *vscroll = nullptr;
bool scroll_visible = false;
bool scroll_follow = false;
bool scroll_following = false;
bool scroll_active = true;
int scroll_w = 0;
bool scroll_updated = false;
bool updating_scroll = false;
int current_idx = 1;
int current_char_ofs = 0;
int visible_paragraph_count = 0;
int visible_line_count = 0;
int tab_size = 4;
bool underline_meta = true;
bool override_selected_font_color = false;
Align default_align = ALIGN_LEFT;
ItemMeta *meta_hovering = nullptr;
Variant current_meta;
Array custom_effects;
void _invalidate_current_line(ItemFrame *p_frame);
void _validate_line_caches(ItemFrame *p_frame);
void _add_item(Item *p_item, bool p_enter = false, bool p_ensure_newline = false);
void _remove_item(Item *p_item, const int p_line, const int p_subitem_line);
String language;
TextDirection text_direction = TEXT_DIRECTION_AUTO;
Control::StructuredTextParser st_parser = STRUCTURED_TEXT_DEFAULT;
Array st_args;
struct Selection {
ItemFrame *click_frame = nullptr;
int click_line = 0;
Item *click_item = nullptr;
int click_char = 0;
ItemFrame *from_frame = nullptr;
int from_line = 0;
Item *from_item = nullptr;
int from_char = 0;
ItemFrame *to_frame = nullptr;
int to_line = 0;
Item *to_item = nullptr;
int to_char = 0;
bool active = false; // anything selected? i.e. from, to, etc. valid?
bool enabled = false; // allow selections?
};
Selection selection;
bool deselect_on_focus_loss_enabled = true;
int visible_characters = -1;
float percent_visible = 1.0;
void _find_click(ItemFrame *p_frame, const Point2i &p_click, ItemFrame **r_click_frame = nullptr, int *r_click_line = nullptr, Item **r_click_item = nullptr, int *r_click_char = nullptr, bool *r_outside = nullptr);
String _get_line_text(ItemFrame *p_frame, int p_line, Selection p_sel) const;
bool _search_line(ItemFrame *p_frame, int p_line, const String &p_string, int p_char_idx, bool p_reverse_search);
bool _search_table(ItemTable *p_table, List<Item *>::Element *p_from, const String &p_string, bool p_reverse_search);
void _shape_line(ItemFrame *p_frame, int p_line, const Ref<Font> &p_base_font, int p_base_font_size, int p_width, int *r_char_offset);
void _resize_line(ItemFrame *p_frame, int p_line, const Ref<Font> &p_base_font, int p_base_font_size, int p_width);
int _draw_line(ItemFrame *p_frame, int p_line, const Vector2 &p_ofs, int p_width, const Color &p_base_color, int p_outline_size, const Color &p_outline_color, const Color &p_font_shadow_color, int p_shadow_outline_size, const Point2 &p_shadow_ofs);
float _find_click_in_line(ItemFrame *p_frame, int p_line, const Vector2 &p_ofs, int p_width, const Point2i &p_click, ItemFrame **r_click_frame = nullptr, int *r_click_line = nullptr, Item **r_click_item = nullptr, int *r_click_char = nullptr);
String _roman(int p_num, bool p_capitalize) const;
String _letters(int p_num, bool p_capitalize) const;
Item *_get_item_at_pos(Item *p_item_from, Item *p_item_to, int p_position);
void _find_frame(Item *p_item, ItemFrame **r_frame, int *r_line);
Ref<Font> _find_font(Item *p_item);
int _find_font_size(Item *p_item);
Dictionary _find_font_features(Item *p_item);
int _find_outline_size(Item *p_item, int p_default);
ItemList *_find_list_item(Item *p_item);
ItemDropcap *_find_dc_item(Item *p_item);
int _find_list(Item *p_item, Vector<int> &r_index, Vector<ItemList *> &r_list);
int _find_margin(Item *p_item, const Ref<Font> &p_base_font, int p_base_font_size);
Align _find_align(Item *p_item);
TextServer::Direction _find_direction(Item *p_item);
Control::StructuredTextParser _find_stt(Item *p_item);
String _find_language(Item *p_item);
Color _find_color(Item *p_item, const Color &p_default_color);
Color _find_outline_color(Item *p_item, const Color &p_default_color);
bool _find_underline(Item *p_item);
bool _find_strikethrough(Item *p_item);
bool _find_meta(Item *p_item, Variant *r_meta, ItemMeta **r_item = nullptr);
Color _find_bgcolor(Item *p_item);
Color _find_fgcolor(Item *p_item);
bool _find_layout_subitem(Item *from, Item *to);
void _fetch_item_fx_stack(Item *p_item, Vector<ItemFX *> &r_stack);
void _update_scroll();
void _update_fx(ItemFrame *p_frame, double p_delta_time);
void _scroll_changed(double);
virtual void gui_input(const Ref<InputEvent> &p_event) override;
Item *_get_next_item(Item *p_item, bool p_free = false) const;
Item *_get_prev_item(Item *p_item, bool p_free = false) const;
Rect2 _get_text_rect();
Ref<RichTextEffect> _get_custom_effect_by_code(String p_bbcode_identifier);
virtual Dictionary parse_expressions_for_values(Vector<String> p_expressions);
void _draw_fbg_boxes(RID p_ci, RID p_rid, Vector2 line_off, Item *it_from, Item *it_to, int start, int end, int fbg_flag);
#ifndef DISABLE_DEPRECATED
// Kept for compatibility from 3.x to 4.0.
bool _set(const StringName &p_name, const Variant &p_value);
#endif
bool use_bbcode = false;
String text;
int fixed_width = -1;
bool fit_content_height = false;
public:
String get_parsed_text() const;
void add_text(const String &p_text);
void add_image(const Ref<Texture2D> &p_image, const int p_width = 0, const int p_height = 0, const Color &p_color = Color(1.0, 1.0, 1.0), InlineAlign p_align = INLINE_ALIGN_CENTER);
void add_newline();
bool remove_line(const int p_line);
void push_dropcap(const String &p_string, const Ref<Font> &p_font, int p_size, const Rect2 &p_dropcap_margins = Rect2(), const Color &p_color = Color(1, 1, 1), int p_ol_size = 0, const Color &p_ol_color = Color(0, 0, 0, 0));
void push_font(const Ref<Font> &p_font);
void push_font_size(int p_font_size);
void push_font_features(const Dictionary &p_features);
void push_outline_size(int p_font_size);
void push_normal();
void push_bold();
void push_bold_italics();
void push_italics();
void push_mono();
void push_color(const Color &p_color);
void push_outline_color(const Color &p_color);
void push_underline();
void push_strikethrough();
void push_paragraph(Align p_align, Control::TextDirection p_direction = Control::TEXT_DIRECTION_INHERITED, const String &p_language = "", Control::StructuredTextParser p_st_parser = STRUCTURED_TEXT_DEFAULT);
void push_indent(int p_level);
void push_list(int p_level, ListType p_list, bool p_capitalize);
void push_meta(const Variant &p_meta);
void push_table(int p_columns, InlineAlign p_align = INLINE_ALIGN_TOP);
void push_fade(int p_start_index, int p_length);
void push_shake(int p_strength, float p_rate);
void push_wave(float p_frequency, float p_amplitude);
void push_tornado(float p_frequency, float p_radius);
void push_rainbow(float p_saturation, float p_value, float p_frequency);
void push_bgcolor(const Color &p_color);
void push_fgcolor(const Color &p_color);
void push_customfx(Ref<RichTextEffect> p_custom_effect, Dictionary p_environment);
void set_table_column_expand(int p_column, bool p_expand, int p_ratio = 1);
void set_cell_row_background_color(const Color &p_odd_row_bg, const Color &p_even_row_bg);
void set_cell_border_color(const Color &p_color);
void set_cell_size_override(const Size2 &p_min_size, const Size2 &p_max_size);
void set_cell_padding(const Rect2 &p_padding);
int get_current_table_column() const;
void push_cell();
void pop();
void clear();
void set_offset(int p_pixel);
void set_meta_underline(bool p_underline);
bool is_meta_underlined() const;
void set_override_selected_font_color(bool p_override_selected_font_color);
bool is_overriding_selected_font_color() const;
void set_scroll_active(bool p_active);
bool is_scroll_active() const;
void set_scroll_follow(bool p_follow);
bool is_scroll_following() const;
void set_tab_size(int p_spaces);
int get_tab_size() const;
void set_fit_content_height(bool p_enabled);
bool is_fit_content_height_enabled() const;
bool search(const String &p_string, bool p_from_selection = false, bool p_search_previous = false);
void scroll_to_paragraph(int p_paragraph);
int get_paragraph_count() const;
int get_visible_paragraph_count() const;
void scroll_to_line(int p_line);
int get_line_count() const;
int get_visible_line_count() const;
int get_content_height() const;
VScrollBar *get_v_scroll() { return vscroll; }
virtual CursorShape get_cursor_shape(const Point2 &p_pos) const override;
void set_selection_enabled(bool p_enabled);
bool is_selection_enabled() const;
int get_selection_from() const;
int get_selection_to() const;
String get_selected_text() const;
void selection_copy();
void set_deselect_on_focus_loss_enabled(const bool p_enabled);
bool is_deselect_on_focus_loss_enabled() const;
void parse_bbcode(const String &p_bbcode);
void append_text(const String &p_bbcode);
void set_use_bbcode(bool p_enable);
bool is_using_bbcode() const;
void set_text(const String &p_bbcode);
String get_text() const;
void set_text_direction(TextDirection p_text_direction);
TextDirection get_text_direction() const;
void set_language(const String &p_language);
String get_language() const;
void set_structured_text_bidi_override(Control::StructuredTextParser p_parser);
Control::StructuredTextParser get_structured_text_bidi_override() const;
void set_structured_text_bidi_override_options(Array p_args);
Array get_structured_text_bidi_override_options() const;
void set_visible_characters(int p_visible);
int get_visible_characters() const;
int get_total_character_count() const;
void set_percent_visible(float p_percent);
float get_percent_visible() const;
void set_effects(Array p_effects);
Array get_effects();
void install_effect(const Variant effect);
void set_fixed_size_to_width(int p_width);
virtual Size2 get_minimum_size() const override;
RichTextLabel();
~RichTextLabel();
};
VARIANT_ENUM_CAST(RichTextLabel::Align);
VARIANT_ENUM_CAST(RichTextLabel::ListType);
VARIANT_ENUM_CAST(RichTextLabel::ItemType);
#endif // RICH_TEXT_LABEL_H
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