/*
 * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
 * Copyright (C) 2007 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "third_party/blink/renderer/core/svg/svg_rect.h"

#include "third_party/blink/renderer/core/svg/animation/smil_animation_effect_parameters.h"
#include "third_party/blink/renderer/core/svg/svg_parser_utilities.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/wtf/text/character_visitor.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"

namespace blink {

SVGRect* SVGRect::Clone() const {
  return MakeGarbageCollected<SVGRect>(x_, y_, width_, height_);
}

template <typename CharType>
SVGParsingError SVGRect::Parse(base::span<const CharType> span) {
  const size_t start_size = span.size();
  float x = 0;
  float y = 0;
  float width = 0;
  float height = 0;
  if (!ParseNumber(span, x) || !ParseNumber(span, y) ||
      !ParseNumber(span, width) ||
      !ParseNumber(span, height, kDisallowWhitespace)) {
    return SVGParsingError(SVGParseStatus::kExpectedNumber,
                           start_size - span.size());
  }

  if (SkipOptionalSVGSpaces(span)) {
    // Nothing should come after the last, fourth number.
    return SVGParsingError(SVGParseStatus::kTrailingGarbage,
                           start_size - span.size());
  }

  Set(x, y, width, height);
  is_valid_ = true;
  return SVGParseStatus::kNoError;
}

SVGParsingError SVGRect::SetValueAsString(const String& string) {
  // In case the string is invalid, the rect will be treated as invalid.
  is_valid_ = false;
  // Also clear the existing values.
  Set(0, 0, 0, 0);

  if (string.IsNull())
    return SVGParseStatus::kNoError;

  if (string.empty())
    return SVGParsingError(SVGParseStatus::kExpectedNumber, 0);

  return VisitCharacters(string, [&](auto chars) { return Parse(chars); });
}

String SVGRect::ValueAsString() const {
  StringBuilder builder;
  builder.AppendNumber(X());
  builder.Append(' ');
  builder.AppendNumber(Y());
  builder.Append(' ');
  builder.AppendNumber(Width());
  builder.Append(' ');
  builder.AppendNumber(Height());
  return builder.ToString();
}

bool SVGRect::Add(const SVGPropertyBase* other, const SVGElement*) {
  auto* other_rect = To<SVGRect>(other);
  Add(other_rect->x_, other_rect->y_, other_rect->width_, other_rect->height_);
  return true;
}

void SVGRect::Set(float x, float y, float width, float height) {
  x_ = x;
  y_ = y;
  width_ = width;
  height_ = height;
}

void SVGRect::Add(float x, float y, float width, float height) {
  x_ += x;
  y_ += y;
  width_ += width;
  height_ += height;
}

void SVGRect::CalculateAnimatedValue(
    const SMILAnimationEffectParameters& parameters,
    float percentage,
    unsigned repeat_count,
    const SVGPropertyBase* from_value,
    const SVGPropertyBase* to_value,
    const SVGPropertyBase* to_at_end_of_duration_value,
    const SVGElement*) {
  auto* from_rect = To<SVGRect>(from_value);
  auto* to_rect = To<SVGRect>(to_value);
  auto* to_at_end_of_duration_rect = To<SVGRect>(to_at_end_of_duration_value);

  float x = ComputeAnimatedNumber(parameters, percentage, repeat_count,
                                  from_rect->X(), to_rect->X(),
                                  to_at_end_of_duration_rect->X());
  float y = ComputeAnimatedNumber(parameters, percentage, repeat_count,
                                  from_rect->Y(), to_rect->Y(),
                                  to_at_end_of_duration_rect->Y());
  float width = ComputeAnimatedNumber(parameters, percentage, repeat_count,
                                      from_rect->Width(), to_rect->Width(),
                                      to_at_end_of_duration_rect->Width());
  float height = ComputeAnimatedNumber(parameters, percentage, repeat_count,
                                       from_rect->Height(), to_rect->Height(),
                                       to_at_end_of_duration_rect->Height());
  if (parameters.is_additive)
    Add(x, y, width, height);
  else
    Set(x, y, width, height);
}

float SVGRect::CalculateDistance(const SVGPropertyBase* to,
                                 const SVGElement* context_element) const {
  // FIXME: Distance calculation is not possible for SVGRect right now. We need
  // the distance for every single value.
  return -1;
}

}  // namespace blink