Libraries: Move to Userland/Libraries/

1 files changed, 233 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/MarkupGenerator.cpp b/Userland/Libraries/LibJS/MarkupGenerator.cpp
new file mode 100644
index 0000000000..afdd347098
--- /dev/null
+++ b/Userland/Libraries/LibJS/MarkupGenerator.cpp
@@ -0,0 +1,233 @@
+/*
+ * Copyright (c) 2020, Hunter Salyer <thefalsehonesty@gmail.com>
+ * 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/HashTable.h>
+#include <AK/StringBuilder.h>
+#include <LibJS/Lexer.h>
+#include <LibJS/MarkupGenerator.h>
+#include <LibJS/Runtime/Array.h>
+#include <LibJS/Runtime/Date.h>
+#include <LibJS/Runtime/Error.h>
+#include <LibJS/Runtime/Object.h>
+
+namespace JS {
+
+String MarkupGenerator::html_from_source(const StringView& source)
+{
+    StringBuilder builder;
+    auto lexer = Lexer(source);
+    for (auto token = lexer.next(); token.type() != TokenType::Eof; token = lexer.next()) {
+        builder.append(token.trivia());
+        builder.append(wrap_string_in_style(token.value(), style_type_for_token(token)));
+    }
+    return builder.to_string();
+}
+
+String MarkupGenerator::html_from_value(Value value)
+{
+    StringBuilder output_html;
+    value_to_html(value, output_html);
+    return output_html.to_string();
+}
+
+void MarkupGenerator::value_to_html(Value value, StringBuilder& output_html, HashTable<Object*> seen_objects)
+{
+    if (value.is_empty()) {
+        output_html.append("&lt;empty&gt;");
+        return;
+    }
+
+    if (value.is_object()) {
+        if (seen_objects.contains(&value.as_object())) {
+            // FIXME: Maybe we should only do this for circular references,
+            //        not for all reoccurring objects.
+            output_html.appendff("&lt;already printed Object {:p}&gt;", &value.as_object());
+            return;
+        }
+        seen_objects.set(&value.as_object());
+    }
+
+    if (value.is_array())
+        return array_to_html(static_cast<const Array&>(value.as_object()), output_html, seen_objects);
+
+    if (value.is_object()) {
+        auto& object = value.as_object();
+        if (object.is_function())
+            return function_to_html(object, output_html, seen_objects);
+        if (is<Date>(object))
+            return date_to_html(object, output_html, seen_objects);
+        if (is<Error>(object))
+            return error_to_html(object, output_html, seen_objects);
+        return object_to_html(object, output_html, seen_objects);
+    }
+
+    if (value.is_string())
+        output_html.append(open_style_type(StyleType::String));
+    else if (value.is_number())
+        output_html.append(open_style_type(StyleType::Number));
+    else if (value.is_boolean() || value.is_nullish())
+        output_html.append(open_style_type(StyleType::KeywordBold));
+
+    if (value.is_string())
+        output_html.append('"');
+    output_html.append(escape_html_entities(value.to_string_without_side_effects()));
+    if (value.is_string())
+        output_html.append('"');
+
+    output_html.append("</span>");
+}
+
+void MarkupGenerator::array_to_html(const Array& array, StringBuilder& html_output, HashTable<Object*>& seen_objects)
+{
+    html_output.append(wrap_string_in_style("[ ", StyleType::Punctuation));
+    bool first = true;
+    for (auto it = array.indexed_properties().begin(false); it != array.indexed_properties().end(); ++it) {
+        if (!first)
+            html_output.append(wrap_string_in_style(", ", StyleType::Punctuation));
+        first = false;
+        // FIXME: Exception check
+        value_to_html(it.value_and_attributes(const_cast<Array*>(&array)).value, html_output, seen_objects);
+    }
+    html_output.append(wrap_string_in_style(" ]", StyleType::Punctuation));
+}
+
+void MarkupGenerator::object_to_html(const Object& object, StringBuilder& html_output, HashTable<Object*>& seen_objects)
+{
+    html_output.append(wrap_string_in_style("{ ", StyleType::Punctuation));
+    bool first = true;
+    for (auto& entry : object.indexed_properties()) {
+        if (!first)
+            html_output.append(wrap_string_in_style(", ", StyleType::Punctuation));
+        first = false;
+        html_output.append(wrap_string_in_style(String::number(entry.index()), StyleType::Number));
+        html_output.append(wrap_string_in_style(": ", StyleType::Punctuation));
+        // FIXME: Exception check
+        value_to_html(entry.value_and_attributes(const_cast<Object*>(&object)).value, html_output, seen_objects);
+    }
+
+    if (!object.indexed_properties().is_empty() && object.shape().property_count())
+        html_output.append(wrap_string_in_style(", ", StyleType::Punctuation));
+
+    size_t index = 0;
+    for (auto& it : object.shape().property_table_ordered()) {
+        html_output.append(wrap_string_in_style(String::formatted("\"{}\"", escape_html_entities(it.key.to_display_string())), StyleType::String));
+        html_output.append(wrap_string_in_style(": ", StyleType::Punctuation));
+        value_to_html(object.get_direct(it.value.offset), html_output, seen_objects);
+        if (index != object.shape().property_count() - 1)
+            html_output.append(wrap_string_in_style(", ", StyleType::Punctuation));
+        ++index;
+    }
+
+    html_output.append(wrap_string_in_style(" }", StyleType::Punctuation));
+}
+
+void MarkupGenerator::function_to_html(const Object& function, StringBuilder& html_output, HashTable<Object*>&)
+{
+    html_output.appendff("[{}]", function.class_name());
+}
+
+void MarkupGenerator::date_to_html(const Object& date, StringBuilder& html_output, HashTable<Object*>&)
+{
+    html_output.appendff("Date {}", static_cast<const JS::Date&>(date).string());
+}
+
+void MarkupGenerator::error_to_html(const Object& object, StringBuilder& html_output, HashTable<Object*>&)
+{
+    auto& error = static_cast<const Error&>(object);
+    html_output.append(wrap_string_in_style(String::formatted("[{}]", error.name()), StyleType::Invalid));
+    if (!error.message().is_empty()) {
+        html_output.appendff(": {}", escape_html_entities(error.message()));
+    }
+}
+
+String MarkupGenerator::style_from_style_type(StyleType type)
+{
+    switch (type) {
+    case StyleType::Invalid:
+        return "color: red;";
+    case StyleType::String:
+        return "color: -libweb-palette-syntax-string;";
+    case StyleType::Number:
+        return "color: -libweb-palette-syntax-number;";
+    case StyleType::KeywordBold:
+        return "color: -libweb-palette-syntax-keyword; font-weight: bold;";
+    case StyleType::Punctuation:
+        return "color: -libweb-palette-syntax-punctuation;";
+    case StyleType::Operator:
+        return "color: -libweb-palette-syntax-operator;";
+    case StyleType::Keyword:
+        return "color: -libweb-palette-syntax-keyword;";
+    case StyleType::ControlKeyword:
+        return "color: -libweb-palette-syntax-control-keyword;";
+    case StyleType::Identifier:
+        return "color: -libweb-palette-syntax-identifier;";
+    default:
+        ASSERT_NOT_REACHED();
+    }
+}
+
+MarkupGenerator::StyleType MarkupGenerator::style_type_for_token(Token token)
+{
+    switch (token.category()) {
+    case TokenCategory::Invalid:
+        return StyleType::Invalid;
+    case TokenCategory::Number:
+        return StyleType::Number;
+    case TokenCategory::String:
+        return StyleType::String;
+    case TokenCategory::Punctuation:
+        return StyleType::Punctuation;
+    case TokenCategory::Operator:
+        return StyleType::Operator;
+    case TokenCategory::Keyword:
+        switch (token.type()) {
+        case TokenType::BoolLiteral:
+        case TokenType::NullLiteral:
+            return StyleType::KeywordBold;
+        default:
+            return StyleType::Keyword;
+        }
+    case TokenCategory::ControlKeyword:
+        return StyleType::ControlKeyword;
+    case TokenCategory::Identifier:
+        return StyleType::Identifier;
+    default:
+        dbgln("Unknown style type for token {}", token.name());
+        ASSERT_NOT_REACHED();
+    }
+}
+
+String MarkupGenerator::open_style_type(StyleType type)
+{
+    return String::formatted("<span style=\"{}\">", style_from_style_type(type));
+}
+
+String MarkupGenerator::wrap_string_in_style(String source, StyleType type)
+{
+    return String::formatted("<span style=\"{}\">{}</span>", style_from_style_type(type), escape_html_entities(source));
+}
+
+}