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ladybird/Userland/Libraries/LibWeb/Dump.cpp
Andreas Kling 140463e833 LibWeb: Parse "display: flex" and create BlockBox layout nodes for them 
I'm not 100% sure that BlockBox is the right layout node for flex
containers, but it's the most obviously fitting one we already have.
2021-01-18 20:20:00 +01:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/QuickSort.h>
#include <AK/StringBuilder.h>
#include <AK/Utf8View.h>
#include <LibWeb/CSS/PropertyID.h>
#include <LibWeb/CSS/StyleSheet.h>
#include <LibWeb/DOM/Comment.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/DocumentFragment.h>
#include <LibWeb/DOM/DocumentType.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOM/Text.h>
#include <LibWeb/Dump.h>
#include <LibWeb/HTML/HTMLTemplateElement.h>
#include <LibWeb/Layout/BlockBox.h>
#include <LibWeb/Layout/Node.h>
#include <LibWeb/Layout/TextNode.h>
#include <stdio.h>
namespace Web {
void dump_tree(const DOM::Node& node)
{
static int indent = 0;
for (int i = 0; i < indent; ++i)
dbgprintf(" ");
if (is<DOM::Document>(node)) {
dbgprintf("*Document*\n");
} else if (is<DOM::Element>(node)) {
dbgprintf("<%s", downcast<DOM::Element>(node).local_name().characters());
downcast<DOM::Element>(node).for_each_attribute([](auto& name, auto& value) {
dbgprintf(" %s=%s", name.characters(), value.characters());
});
dbgprintf(">\n");
} else if (is<DOM::Text>(node)) {
dbgprintf("\"%s\"\n", downcast<DOM::Text>(node).data().characters());
} else if (is<DOM::DocumentType>(node)) {
dbgprintf("<!DOCTYPE html>\n");
} else if (is<DOM::Comment>(node)) {
dbgprintf("<!--%s-->\n", downcast<DOM::Comment>(node).data().characters());
} else if (is<DOM::DocumentFragment>(node)) {
dbgprintf("#document-fragment\n");
}
++indent;
if (is<DOM::ParentNode>(node)) {
if (!is<HTML::HTMLTemplateElement>(node)) {
static_cast<const DOM::ParentNode&>(node).for_each_child([](auto& child) {
dump_tree(child);
});
} else {
auto& template_element = downcast<HTML::HTMLTemplateElement>(node);
dump_tree(template_element.content());
}
}
--indent;
}
void dump_tree(const Layout::Node& layout_node, bool show_box_model, bool show_specified_style)
{
StringBuilder builder;
dump_tree(builder, layout_node, show_box_model, show_specified_style, true);
dbgprintf("%s", builder.to_string().characters());
}
void dump_tree(StringBuilder& builder, const Layout::Node& layout_node, bool show_box_model, bool show_specified_style, bool interactive)
{
static size_t indent = 0;
for (size_t i = 0; i < indent; ++i)
builder.append(" ");
FlyString tag_name;
if (layout_node.is_anonymous())
tag_name = "(anonymous)";
else if (is<DOM::Text>(layout_node.dom_node()))
tag_name = "#text";
else if (is<DOM::Document>(layout_node.dom_node()))
tag_name = "#document";
else if (is<DOM::Element>(layout_node.dom_node()))
tag_name = downcast<DOM::Element>(*layout_node.dom_node()).local_name();
else
tag_name = "???";
String identifier = "";
if (layout_node.dom_node() && is<DOM::Element>(*layout_node.dom_node())) {
auto& element = downcast<DOM::Element>(*layout_node.dom_node());
StringBuilder builder;
auto id = element.attribute(HTML::AttributeNames::id);
if (!id.is_empty()) {
builder.append('#');
builder.append(id);
}
for (auto& class_name : element.class_names()) {
builder.append('.');
builder.append(class_name);
}
identifier = builder.to_string();
}
const char* nonbox_color_on = "";
const char* box_color_on = "";
const char* positioned_color_on = "";
const char* floating_color_on = "";
const char* inline_block_color_on = "";
const char* line_box_color_on = "";
const char* fragment_color_on = "";
const char* flex_color_on = "";
const char* color_off = "";
if (interactive) {
nonbox_color_on = "\033[33m";
box_color_on = "\033[34m";
positioned_color_on = "\033[31;1m";
floating_color_on = "\033[32;1m";
inline_block_color_on = "\033[36;1m";
line_box_color_on = "\033[34;1m";
fragment_color_on = "\033[35;1m";
flex_color_on = "\033[34;1m";
color_off = "\033[0m";
}
if (!is<Layout::Box>(layout_node)) {
builder.appendff("{}{}{} <{}{}{}>",
nonbox_color_on,
layout_node.class_name().substring_view(13),
color_off,
tag_name,
nonbox_color_on,
identifier,
color_off);
if (interactive)
builder.appendff(" @{:p}", &layout_node);
builder.append("\n");
} else {
auto& box = downcast<Layout::Box>(layout_node);
builder.appendff("{}{}{} <{}{}{}{}> ",
box_color_on,
box.class_name().substring_view(13),
color_off,
box_color_on,
tag_name,
color_off,
identifier.characters());
if (interactive)
builder.appendff("@{:p} ", &layout_node);
builder.appendff("at ({},{}) size {}x{}",
(int)box.absolute_x(),
(int)box.absolute_y(),
(int)box.width(),
(int)box.height());
if (box.is_positioned())
builder.appendff(" {}positioned{}", positioned_color_on, color_off);
if (box.is_floating())
builder.appendff(" {}floating{}", floating_color_on, color_off);
if (box.is_inline_block())
builder.appendff(" {}inline-block{}", inline_block_color_on, color_off);
if (box.computed_values().display() == CSS::Display::Flex)
builder.appendff(" {}flex{}", flex_color_on, color_off);
if (show_box_model) {
// Dump the horizontal box properties
builder.appendf(" [%g+%g+%g %g %g+%g+%g]",
box.box_model().margin.left,
box.box_model().border.left,
box.box_model().padding.left,
box.width(),
box.box_model().padding.right,
box.box_model().border.right,
box.box_model().margin.right);
// And the vertical box properties
builder.appendf(" [%g+%g+%g %g %g+%g+%g]",
box.box_model().margin.top,
box.box_model().border.top,
box.box_model().padding.top,
box.height(),
box.box_model().padding.bottom,
box.box_model().border.bottom,
box.box_model().margin.bottom);
}
builder.append("\n");
}
if (is<Layout::BlockBox>(layout_node) && static_cast<const Layout::BlockBox&>(layout_node).children_are_inline()) {
auto& block = static_cast<const Layout::BlockBox&>(layout_node);
for (size_t line_box_index = 0; line_box_index < block.line_boxes().size(); ++line_box_index) {
auto& line_box = block.line_boxes()[line_box_index];
for (size_t i = 0; i < indent; ++i)
builder.append(" ");
builder.appendff(" {}line {}{} width: {}\n",
line_box_color_on,
line_box_index,
color_off,
(int)line_box.width());
for (size_t fragment_index = 0; fragment_index < line_box.fragments().size(); ++fragment_index) {
auto& fragment = line_box.fragments()[fragment_index];
for (size_t i = 0; i < indent; ++i)
builder.append(" ");
builder.appendff(" {}frag {}{} from {} ",
fragment_color_on,
fragment_index,
color_off,
fragment.layout_node().class_name());
if (interactive)
builder.appendff("@{:p}, ", &fragment.layout_node());
builder.appendff("start: {}, length: {}, rect: {}\n",
fragment.start(),
fragment.length(),
enclosing_int_rect(fragment.absolute_rect()).to_string());
if (is<Layout::TextNode>(fragment.layout_node())) {
for (size_t i = 0; i < indent; ++i)
builder.append(" ");
auto& layout_text = static_cast<const Layout::TextNode&>(fragment.layout_node());
auto fragment_text = layout_text.text_for_rendering().substring(fragment.start(), fragment.length());
builder.appendff(" \"{}\"\n", fragment_text);
}
}
}
}
if (show_specified_style && layout_node.dom_node() && layout_node.dom_node()->is_element() && downcast<DOM::Element>(layout_node.dom_node())->specified_css_values()) {
struct NameAndValue {
String name;
String value;
};
Vector<NameAndValue> properties;
downcast<DOM::Element>(*layout_node.dom_node()).specified_css_values()->for_each_property([&](auto property_id, auto& value) {
properties.append({ CSS::string_from_property_id(property_id), value.to_string() });
});
quick_sort(properties, [](auto& a, auto& b) { return a.name < b.name; });
for (auto& property : properties) {
for (size_t i = 0; i < indent; ++i)
builder.append(" ");
builder.appendf(" (%s: %s)\n", property.name.characters(), property.value.characters());
}
}
++indent;
layout_node.for_each_child([&](auto& child) {
dump_tree(builder, child, show_box_model, show_specified_style, interactive);
});
--indent;
}
void dump_selector(const CSS::Selector& selector)
{
dbgprintf(" CSS::Selector:\n");
for (auto& complex_selector : selector.complex_selectors()) {
dbgprintf(" ");
const char* relation_description = "";
switch (complex_selector.relation) {
case CSS::Selector::ComplexSelector::Relation::None:
relation_description = "None";
break;
case CSS::Selector::ComplexSelector::Relation::ImmediateChild:
relation_description = "ImmediateChild";
break;
case CSS::Selector::ComplexSelector::Relation::Descendant:
relation_description = "Descendant";
break;
case CSS::Selector::ComplexSelector::Relation::AdjacentSibling:
relation_description = "AdjacentSibling";
break;
case CSS::Selector::ComplexSelector::Relation::GeneralSibling:
relation_description = "GeneralSibling";
break;
}
if (*relation_description)
dbgprintf("{%s} ", relation_description);
for (size_t i = 0; i < complex_selector.compound_selector.size(); ++i) {
auto& simple_selector = complex_selector.compound_selector[i];
const char* type_description = "Unknown";
switch (simple_selector.type) {
case CSS::Selector::SimpleSelector::Type::Invalid:
type_description = "Invalid";
break;
case CSS::Selector::SimpleSelector::Type::Universal:
type_description = "Universal";
break;
case CSS::Selector::SimpleSelector::Type::Id:
type_description = "Id";
break;
case CSS::Selector::SimpleSelector::Type::Class:
type_description = "Class";
break;
case CSS::Selector::SimpleSelector::Type::TagName:
type_description = "TagName";
break;
}
const char* attribute_match_type_description = "";
switch (simple_selector.attribute_match_type) {
case CSS::Selector::SimpleSelector::AttributeMatchType::None:
break;
case CSS::Selector::SimpleSelector::AttributeMatchType::HasAttribute:
attribute_match_type_description = "HasAttribute";
break;
case CSS::Selector::SimpleSelector::AttributeMatchType::ExactValueMatch:
attribute_match_type_description = "ExactValueMatch";
break;
case CSS::Selector::SimpleSelector::AttributeMatchType::Contains:
attribute_match_type_description = "Contains";
break;
}
const char* pseudo_class_description = "";
switch (simple_selector.pseudo_class) {
case CSS::Selector::SimpleSelector::PseudoClass::Link:
pseudo_class_description = "Link";
break;
case CSS::Selector::SimpleSelector::PseudoClass::Visited:
pseudo_class_description = "Visited";
break;
case CSS::Selector::SimpleSelector::PseudoClass::None:
pseudo_class_description = "None";
break;
case CSS::Selector::SimpleSelector::PseudoClass::Root:
pseudo_class_description = "Root";
break;
case CSS::Selector::SimpleSelector::PseudoClass::Focus:
pseudo_class_description = "Focus";
break;
case CSS::Selector::SimpleSelector::PseudoClass::Empty:
pseudo_class_description = "Empty";
break;
case CSS::Selector::SimpleSelector::PseudoClass::Hover:
pseudo_class_description = "Hover";
break;
case CSS::Selector::SimpleSelector::PseudoClass::LastChild:
pseudo_class_description = "LastChild";
break;
case CSS::Selector::SimpleSelector::PseudoClass::FirstChild:
pseudo_class_description = "FirstChild";
break;
case CSS::Selector::SimpleSelector::PseudoClass::OnlyChild:
pseudo_class_description = "OnlyChild";
break;
}
dbgprintf("%s:%s", type_description, simple_selector.value.characters());
if (simple_selector.pseudo_class != CSS::Selector::SimpleSelector::PseudoClass::None)
dbgprintf(" pseudo_class=%s", pseudo_class_description);
if (simple_selector.attribute_match_type != CSS::Selector::SimpleSelector::AttributeMatchType::None) {
dbgprintf(" [%s, name='%s', value='%s']", attribute_match_type_description, simple_selector.attribute_name.characters(), simple_selector.attribute_value.characters());
}
if (i != complex_selector.compound_selector.size() - 1)
dbgprintf(", ");
}
dbgprintf("\n");
}
}
void dump_rule(const CSS::StyleRule& rule)
{
dbgprintf("Rule:\n");
for (auto& selector : rule.selectors()) {
dump_selector(selector);
}
dbgprintf(" Declarations:\n");
for (auto& property : rule.declaration().properties()) {
dbgprintf(" %s: '%s'\n", CSS::string_from_property_id(property.property_id), property.value->to_string().characters());
}
}
void dump_sheet(const CSS::StyleSheet& sheet)
{
dbgprintf("StyleSheet{%p}: %zu rule(s)\n", &sheet, sheet.rules().size());
for (auto& rule : sheet.rules()) {
dump_rule(rule);
}
}
}
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