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Diffstat (limited to 'src/object/sp-text.h')
| -rw-r--r-- | src/object/sp-text.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/object/sp-text.h b/src/object/sp-text.h new file mode 100644 index 0000000..77c2b8f --- /dev/null +++ b/src/object/sp-text.h @@ -0,0 +1,152 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#ifndef SEEN_SP_TEXT_H +#define SEEN_SP_TEXT_H + +/* + * SVG <text> and <tspan> implementation + * + * Author: + * Lauris Kaplinski <lauris@kaplinski.com> + * + * Copyright (C) 1999-2002 Lauris Kaplinski + * Copyright (C) 2000-2001 Ximian, Inc. + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <cstddef> +#include <sigc++/sigc++.h> + +#include "desktop.h" +#include "sp-item.h" +#include "sp-string.h" // Provides many other headers with SP_IS_STRING +#include "text-tag-attributes.h" + +#include "libnrtype/Layout-TNG.h" + +#include "xml/node-event-vector.h" + +#include <memory> + +/* Text specific flags */ +#define SP_TEXT_CONTENT_MODIFIED_FLAG SP_OBJECT_USER_MODIFIED_FLAG_A +#define SP_TEXT_LAYOUT_MODIFIED_FLAG SP_OBJECT_USER_MODIFIED_FLAG_A + +class SPShape; + +/* SPText */ +class SPText : public SPItem { +public: + SPText(); + ~SPText() override; + + /** Converts the text object to its component curves */ + std::unique_ptr<SPCurve> getNormalizedBpath() const; + + /** Completely recalculates the layout. */ + void rebuildLayout(); + + //semiprivate: (need to be accessed by the C-style functions still) + TextTagAttributes attributes; + Inkscape::Text::Layout layout; + + /** when the object is transformed it's nicer to change the font size + and coordinates when we can, rather than just applying a matrix + transform. is_root is used to indicate to the function that it should + extend zero-length position vectors to length 1 in order to record the + new position. This is necessary to convert from objects whose position is + completely specified by transformations. */ + static void _adjustCoordsRecursive(SPItem *item, Geom::Affine const &m, double ex, bool is_root = true); + static void _adjustFontsizeRecursive(SPItem *item, double ex, bool is_root = true); + /** + This two functions are useful because layout calculations need text visible for example + Calculating a invisible char position object or pasting text with paragraphs that overflow + shape defined. I have doubts about transform into a toggle function*/ + void show_shape_inside(); + void hide_shape_inside(); + + /** discards the drawing objects representing this text. */ + void _clearFlow(Inkscape::DrawingGroup *in_arena); + + bool _optimizeTextpathText = false; + + /** Union all exclusion shapes. */ + Shape* getExclusionShape() const; + /** Add a single inclusion shape with padding */ + Shape* getInclusionShape(SPShape *shape, bool padding = false) const; + + std::optional<Geom::Point> getBaselinePoint() const; + +private: + + /** Initializes layout from <text> (i.e. this node). */ + void _buildLayoutInit(); + + /** Recursively walks the xml tree adding tags and their contents. The + non-trivial code does two things: firstly, it manages the positioning + attributes and their inheritance rules, and secondly it keeps track of line + breaks and makes sure both that they are assigned the correct SPObject and + that we don't get a spurious extra one at the end of the flow. */ + unsigned _buildLayoutInput(SPObject *object, Inkscape::Text::Layout::OptionalTextTagAttrs const &parent_optional_attrs, unsigned parent_attrs_offset, bool in_textpath); + + /** Find first x/y values which may be in a descendent element. */ + SVGLength* _getFirstXLength(); + SVGLength* _getFirstYLength(); + SPCSSAttr *css; + + public: + /** Optimize textpath text on next set_transform. */ + void optimizeTextpathText() {_optimizeTextpathText = true;} + + void build(SPDocument* doc, Inkscape::XML::Node* repr) override; + void release() override; + void child_added(Inkscape::XML::Node* child, Inkscape::XML::Node* ref) override; + void remove_child(Inkscape::XML::Node* child) override; + void set(SPAttr key, const char* value) override; + void update(SPCtx* ctx, unsigned int flags) override; + void modified(unsigned int flags) override; + Inkscape::XML::Node* write(Inkscape::XML::Document* doc, Inkscape::XML::Node* repr, unsigned int flags) override; + + Geom::OptRect bbox(Geom::Affine const &transform, SPItem::BBoxType type) const override; + void print(SPPrintContext *ctx) override; + const char* typeName() const override; + const char* displayName() const override; + char* description() const override; + Inkscape::DrawingItem* show(Inkscape::Drawing &drawing, unsigned int key, unsigned int flags) override; + void hide(unsigned int key) override; + void snappoints(std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs) const override; + Geom::Affine set_transform(Geom::Affine const &transform) override; + + // For 'inline-size', need to also remove any 'x' and 'y' added by SVG 1.1 fallback. + void remove_svg11_fallback(); + + void newline_to_sodipodi(); // 'inline-size' to Inkscape multi-line text. + void sodipodi_to_newline(); // Inkscape mult-line text to SVG 2 text. + + bool is_horizontal() const; + bool has_inline_size() const; + bool has_shape_inside() const; + Geom::OptRect get_frame(); // Gets inline-size or shape-inside frame. + Inkscape::XML::Node* get_first_rectangle(); // Gets first shape-inside rectangle (if it exists). + SPItem *get_first_shape_dependency(); + void remove_newlines(); // Removes newlines in text. +}; + +SPItem *create_text_with_inline_size (SPDesktop *desktop, Geom::Point p0, Geom::Point p1); +SPItem *create_text_with_rectangle (SPDesktop *desktop, Geom::Point p0, Geom::Point p1); + +MAKE_SP_OBJECT_DOWNCAST_FUNCTIONS(SP_TEXT, SPText) +MAKE_SP_OBJECT_TYPECHECK_FUNCTIONS(SP_IS_TEXT, SPText) + +#endif + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |