126 lines
2.8 KiB
C++
126 lines
2.8 KiB
C++
/*
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* \brief Text selection
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* \author Norman Feske
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* \date 2020-01-15
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*/
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/*
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* Copyright (C) 2020 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _TEXT_SELECTION_H_
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#define _TEXT_SELECTION_H_
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/* Genode includes */
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#include <util/xml_generator.h>
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#include <util/list_model.h>
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/* local includes */
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#include <types.h>
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#include <widget_factory.h>
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#include <cursor.h>
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namespace Menu_view { struct Text_selection; }
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class Menu_view::Text_selection : List_model<Text_selection>::Element
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{
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public:
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using Glyph_position = Cursor::Glyph_position;
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private:
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friend class List_model<Text_selection>;
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friend class List<Text_selection>;
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Glyph_position &_glyph_position;
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enum { NAME_MAX_LEN = 32 };
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typedef String<NAME_MAX_LEN> Name;
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Name const _name;
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struct Range
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{
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unsigned xpos_px;
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unsigned width_px;
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};
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Range _range { 0, 0 };
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static Name _node_name(Xml_node node)
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{
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return node.attribute_value("name", Name(node.type()));
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}
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Range _range_from_xml_node(Xml_node node)
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{
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unsigned const at = node.attribute_value("at", 0u),
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length = node.attribute_value("length", 0u);
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unsigned const x1 = _glyph_position.xpos_of_glyph(at),
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x2 = _glyph_position.xpos_of_glyph(at + length);
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unsigned const width = (x2 >= x1 ? x2 - x1 : 0);
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return { .xpos_px = x1, .width_px = width };
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}
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public:
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Text_selection(Xml_node node, Glyph_position &glyph_position)
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:
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_glyph_position(glyph_position), _name(_node_name(node))
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{ }
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void draw(Surface<Pixel_rgb888> &pixel_surface,
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Surface<Pixel_alpha8> &,
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Point at, unsigned height) const
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{
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Color const color(0xcf, 0x69, 0x69, 180);
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Box_painter::paint(pixel_surface,
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Rect(at + Point(_range.xpos_px, 0),
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Area(_range.width_px, height)),
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color);
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}
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struct Model_update_policy : List_model<Text_selection>::Update_policy
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{
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Allocator &_alloc;
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Glyph_position &_glyph_position;
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Model_update_policy(Allocator &alloc, Glyph_position &glyph_position)
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:
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_alloc(alloc), _glyph_position(glyph_position)
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{ }
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void destroy_element(Text_selection &t) { destroy(_alloc, &t); }
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Text_selection &create_element(Xml_node node)
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{
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return *new (_alloc)
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Text_selection(node, _glyph_position);
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}
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void update_element(Text_selection &t, Xml_node node)
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{
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t._range = t._range_from_xml_node(node);
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}
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static bool element_matches_xml_node(Text_selection const &t, Xml_node node)
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{
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return node.has_type("selection") && _node_name(node) == t._name;
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}
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static bool node_is_element(Xml_node node)
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{
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return node.has_type("selection");
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}
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};
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};
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#endif /* _TEXT_SELECTION_ */
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