jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <LibGfx/Font.h>
28#include <LibGfx/StylePainter.h>
29#include <LibGUI/Painter.h>
30#include <LibWeb/Layout/LayoutImage.h>
31
32namespace Web {
33
34LayoutImage::LayoutImage(const HTMLImageElement& element, NonnullRefPtr<StyleProperties> style)
35 : LayoutReplaced(element, move(style))
36{
37}
38
39LayoutImage::~LayoutImage()
40{
41}
42
43void LayoutImage::layout()
44{
45 if (node().preferred_width() && node().preferred_height()) {
46 rect().set_width(node().preferred_width());
47 rect().set_height(node().preferred_height());
48 } else if (renders_as_alt_text()) {
49 auto& font = Gfx::Font::default_font();
50 auto alt = node().alt();
51 if (alt.is_empty())
52 alt = node().src();
53 rect().set_width(font.width(alt) + 16);
54 rect().set_height(font.glyph_height() + 16);
55 } else {
56 rect().set_width(16);
57 rect().set_height(16);
58 }
59
60 LayoutReplaced::layout();
61}
62
63void LayoutImage::render(RenderingContext& context)
64{
65 if (!is_visible())
66 return;
67
68 // FIXME: This should be done at a different level. Also rect() does not include padding etc!
69 if (!context.viewport_rect().intersects(enclosing_int_rect(rect())))
70 return;
71
72 if (renders_as_alt_text()) {
73 context.painter().set_font(Gfx::Font::default_font());
74 Gfx::StylePainter::paint_frame(context.painter(), enclosing_int_rect(rect()), context.palette(), Gfx::FrameShape::Container, Gfx::FrameShadow::Sunken, 2);
75 auto alt = node().alt();
76 if (alt.is_empty())
77 alt = node().src();
78 context.painter().draw_text(enclosing_int_rect(rect()), alt, Gfx::TextAlignment::Center, style().color_or_fallback(CSS::PropertyID::Color, document(), Color::Black), Gfx::TextElision::Right);
79 } else if (node().bitmap())
80 context.painter().draw_scaled_bitmap(enclosing_int_rect(rect()), *node().bitmap(), node().bitmap()->rect());
81 LayoutReplaced::render(context);
82}
83
84bool LayoutImage::renders_as_alt_text() const
85{
86 return !node().image_decoder();
87}
88
89}