323 lines
10 KiB
C++
323 lines
10 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file textAssembler.h
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* @author drose
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* @date 2004-04-06
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*/
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#ifndef TEXTASSEMBLER_H
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#define TEXTASSEMBLER_H
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#include "pandabase.h"
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#include "textProperties.h"
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#include "textFont.h"
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#include "unicodeLatinMap.h"
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#include "geomNode.h"
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#include "pointerTo.h"
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#include "geomTextGlyph.h"
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#include "textPropertiesManager.h"
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#include "textEncoder.h"
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#include "geomVertexRewriter.h"
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#include "pmap.h"
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typedef struct hb_buffer_t hb_buffer_t;
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class TextEncoder;
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class TextGraphic;
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class TextAssembler;
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/**
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* This class is not normally used directly by user code, but is used by the
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* TextNode to lay out a block of text and convert it into rows of Geoms
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* according to the TextProperties. However, user code may take advantage of
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* it, if desired, for very low-level text operations.
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*/
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class EXPCL_PANDA_TEXT TextAssembler {
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PUBLISHED:
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explicit TextAssembler(TextEncoder *encoder);
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TextAssembler(const TextAssembler ©);
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void operator = (const TextAssembler ©);
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~TextAssembler();
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void clear();
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INLINE void set_usage_hint(Geom::UsageHint usage_hint);
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INLINE Geom::UsageHint get_usage_hint() const;
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INLINE void set_max_rows(int max_rows);
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INLINE int get_max_rows() const;
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INLINE void set_dynamic_merge(bool dynamic_merge);
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INLINE bool get_dynamic_merge() const;
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INLINE void set_multiline_mode(bool flag);
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INLINE bool get_multiline_mode() const;
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INLINE void set_properties(const TextProperties &properties);
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INLINE const TextProperties &get_properties() const;
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bool set_wtext(const std::wstring &wtext);
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bool set_wsubstr(const std::wstring &wtext, int start, int count);
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std::wstring get_plain_wtext() const;
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std::wstring get_wordwrapped_plain_wtext() const;
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std::wstring get_wtext() const;
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std::wstring get_wordwrapped_wtext() const;
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bool calc_r_c(int &r, int &c, int n) const;
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INLINE int calc_r(int n) const;
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INLINE int calc_c(int n) const;
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int calc_index(int r, int c) const;
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INLINE int get_num_characters() const;
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INLINE wchar_t get_character(int n) const;
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INLINE const TextGraphic *get_graphic(int n) const;
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INLINE const TextProperties &get_properties(int n) const;
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INLINE PN_stdfloat get_width(int n) const;
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INLINE int get_num_rows() const;
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INLINE int get_num_cols(int r) const;
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INLINE wchar_t get_character(int r, int c) const;
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INLINE const TextGraphic *get_graphic(int r, int c) const;
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INLINE const TextProperties &get_properties(int r, int c) const;
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INLINE PN_stdfloat get_width(int r, int c) const;
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PN_stdfloat get_xpos(int r, int c) const;
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INLINE PN_stdfloat get_ypos(int r, int c) const;
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PT(PandaNode) assemble_text();
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INLINE const LVector2 &get_ul() const;
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INLINE const LVector2 &get_lr() const;
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static PN_stdfloat calc_width(wchar_t character, const TextProperties &properties);
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static PN_stdfloat calc_width(const TextGraphic *graphic, const TextProperties &properties);
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static bool has_exact_character(wchar_t character, const TextProperties &properties);
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static bool has_character(wchar_t character, const TextProperties &properties);
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static bool is_whitespace(wchar_t character, const TextProperties &properties);
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PUBLISHED:
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MAKE_PROPERTY(usage_hint, get_usage_hint, set_usage_hint);
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MAKE_PROPERTY(max_rows, get_max_rows, set_max_rows);
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MAKE_PROPERTY(dynamic_merge, get_dynamic_merge, set_dynamic_merge);
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MAKE_PROPERTY(multiline_mode, get_multiline_mode, set_multiline_mode);
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MAKE_PROPERTY(properties, get_properties, set_properties);
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private:
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class ComputedProperties : public ReferenceCount {
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public:
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INLINE ComputedProperties(const TextProperties &orig_properties);
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INLINE ComputedProperties(ComputedProperties *based_on,
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const std::wstring &wname, TextEncoder *encoder);
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void append_delta(std::wstring &wtext, ComputedProperties *other);
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PT(ComputedProperties) _based_on;
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int _depth;
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std::wstring _wname;
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TextProperties _properties;
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};
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// These structures are built up and operated on by scan_wtext() and
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// wordwrap_text(). It represents the unrolling of the embedded \1 .. \2
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// sequences embedded in the string into a TextProperties pointer associated
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// with each character.
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class TextCharacter {
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public:
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INLINE TextCharacter(wchar_t character, ComputedProperties *cprops);
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INLINE TextCharacter(const TextGraphic *graphic,
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const std::wstring &graphic_wname,
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ComputedProperties *cprops);
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INLINE TextCharacter(const TextCharacter ©);
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INLINE void operator = (const TextCharacter ©);
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wchar_t _character;
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const TextGraphic *_graphic;
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std::wstring _graphic_wname;
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PT(ComputedProperties) _cprops;
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};
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typedef pvector<TextCharacter> TextString;
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class TextRow {
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public:
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INLINE TextRow(int row_start);
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INLINE TextRow(const TextRow ©);
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INLINE void operator = (const TextRow ©);
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TextString _string;
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int _row_start;
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bool _got_soft_hyphens;
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PN_stdfloat _xpos;
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PN_stdfloat _ypos;
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PT(ComputedProperties) _eol_cprops;
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};
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typedef pvector<TextRow> TextBlock;
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PT(ComputedProperties) _initial_cprops;
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// This is the string, unwordwrapped.
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TextString _text_string;
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// And here it is, wordwrapped.
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TextBlock _text_block;
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void scan_wtext(TextString &output_string,
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std::wstring::const_iterator &si,
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const std::wstring::const_iterator &send,
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ComputedProperties *current_cprops);
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bool wordwrap_text();
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INLINE static PN_stdfloat calc_width(const TextCharacter &tch);
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static PN_stdfloat calc_hyphen_width(const TextCharacter &tch);
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// These structures are built up by assemble_paragraph() and assemble_row().
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// They represent the actual Geoms as laid out in a paragraph.
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class GeomCollectorKey {
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public:
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INLINE GeomCollectorKey(const RenderState *state, const GeomVertexFormat *format);
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INLINE bool operator < (const GeomCollectorKey &other) const;
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CPT(RenderState) _state;
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CPT(GeomVertexFormat) _format;
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};
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typedef pmap<int, int> VertexIndexMap;
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class GeomCollector {
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public:
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GeomCollector(const GeomVertexFormat *format);
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GeomCollector(const GeomCollector ©);
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INLINE void count_geom(const Geom *geom);
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GeomPrimitive *get_primitive(TypeHandle prim_type);
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int append_vertex(const GeomVertexData *orig_vdata, int orig_row,
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const LMatrix4 &xform);
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void append_geom(GeomNode *geom_node, const RenderState *state);
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private:
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PT(GeomVertexData) _vdata;
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PT(GeomTextGlyph) _geom;
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PT(GeomTriangles) _triangles;
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PT(GeomLines) _lines;
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PT(GeomPoints) _points;
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};
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typedef pmap<GeomCollectorKey, GeomCollector> GeomCollectorMap;
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struct QuadDef {
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LVecBase4 _dimensions;
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LVecBase4 _uvs;
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PN_stdfloat _slantl, _slanth;
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CPT(TextGlyph) _glyph;
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};
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typedef epvector<QuadDef> QuadDefs;
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typedef pmap<CPT(RenderState), QuadDefs> QuadMap;
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void generate_quads(GeomNode *geom_node, const QuadMap &quad_map);
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class GlyphPlacement {
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public:
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void assign_to(GeomNode *geom_node, const RenderState *state,
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const LVector2 &offset = LVector2::zero()) const;
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void assign_append_to(GeomCollectorMap &geom_collector_map, const RenderState *state,
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const LVector2 &offset = LVector2::zero()) const;
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void assign_quad_to(QuadMap &quad_map, const RenderState *state,
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const LVector2 &offset = LVector2::zero()) const;
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void copy_graphic_to(PandaNode *node, const RenderState *state) const;
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CPT(TextGlyph) _glyph;
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PT(PandaNode) _graphic_model;
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PN_stdfloat _xpos, _ypos;
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PN_stdfloat _scale, _slant;
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const TextProperties *_properties;
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};
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typedef pvector<GlyphPlacement> PlacedGlyphs;
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void assemble_paragraph(PlacedGlyphs &placed_glyphs);
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void assemble_row(TextRow &row,
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PlacedGlyphs &row_placed_glyphs,
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PN_stdfloat &row_width, PN_stdfloat &line_height,
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TextProperties::Alignment &align, PN_stdfloat &wordwrap);
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void shape_buffer(hb_buffer_t *buf, PlacedGlyphs &glyphs, PN_stdfloat &xpos,
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const TextProperties &properties);
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// These interfaces are for implementing cheesy accent marks and ligatures
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// when the font doesn't support them.
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enum CheesyPosition {
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CP_above,
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CP_below,
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CP_top,
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CP_bottom,
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CP_within,
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};
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enum CheesyTransform {
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CT_none,
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CT_mirror_x,
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CT_mirror_y,
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CT_rotate_90,
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CT_rotate_180,
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CT_rotate_270,
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CT_squash,
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CT_squash_mirror_y,
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CT_squash_mirror_diag,
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CT_small_squash,
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CT_small_squash_mirror_y,
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CT_small_squash_mirror_diag,
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CT_small,
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CT_small_rotate_270,
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CT_tiny,
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CT_tiny_mirror_x,
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CT_tiny_rotate_270,
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};
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static void
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draw_underscore(TextAssembler::PlacedGlyphs &row_placed_glyphs,
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PN_stdfloat underscore_start, PN_stdfloat underscore_end,
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const TextProperties *underscore_properties);
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static void
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get_character_glyphs(int character, const TextProperties *properties,
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bool &got_glyph, CPT(TextGlyph) &glyph,
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CPT(TextGlyph) &second_glyph,
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UnicodeLatinMap::AccentType &accent_type,
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int &additional_flags,
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PN_stdfloat &glyph_scale, PN_stdfloat &advance_scale);
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void
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tack_on_accent(UnicodeLatinMap::AccentType accent_type,
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const LPoint3 &min_vert, const LPoint3 &max_vert,
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const LPoint3 ¢roid,
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const TextProperties *properties, GlyphPlacement &placement) const;
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bool
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tack_on_accent(wchar_t accent_mark, CheesyPosition position,
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CheesyTransform transform,
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const LPoint3 &min_vert, const LPoint3 &max_vert,
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const LPoint3 ¢roid,
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const TextProperties *properties, GlyphPlacement &placement) const;
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// These are filled in by assemble_paragraph().
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LVector2 _ul;
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LVector2 _lr;
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PN_stdfloat _next_row_ypos;
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TextEncoder *_encoder;
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Geom::UsageHint _usage_hint;
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int _max_rows;
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bool _dynamic_merge;
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bool _multiline_mode;
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};
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#include "textAssembler.I"
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#endif
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