// Copyright 2008, Google Inc.
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//
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// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * 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.
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include <vsstyle.h>
#include <vssym32.h>

#include "chrome/browser/views/options/options_group_view.h"

#include "base/gfx/native_theme.h"
#include "base/gfx/skia_utils.h"
#include "chrome/app/locales/locale_settings.h"
#include "chrome/browser/standard_layout.h"
#include "chrome/common/gfx/chrome_font.h"
#include "chrome/common/gfx/chrome_canvas.h"
#include "chrome/common/l10n_util.h"
#include "chrome/common/resource_bundle.h"
#include "chrome/views/grid_layout.h"
#include "chrome/views/label.h"
#include "chrome/views/separator.h"
#include "generated_resources.h"

static const int kLeftColumnWidthChars = 20;
static const int kOptionsGroupViewColumnSpacing = 30;

///////////////////////////////////////////////////////////////////////////////
// OptionsGroupView, public:

OptionsGroupView::OptionsGroupView(ChromeViews::View* contents,
                                   const std::wstring& title,
                                   const std::wstring& description,
                                   bool show_separator)
    : contents_(contents),
      title_label_(new ChromeViews::Label(title)),
      description_label_(new ChromeViews::Label(description)),
      separator_(NULL),
      show_separator_(show_separator),
      highlighted_(false) {
  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
  ChromeFont title_font =
      rb.GetFont(ResourceBundle::BaseFont).DeriveFont(0, ChromeFont::BOLD);
  title_label_->SetFont(title_font);
  SkColor title_color = gfx::NativeTheme::instance()->GetThemeColorWithDefault(
      gfx::NativeTheme::BUTTON, BP_GROUPBOX, GBS_NORMAL, TMT_TEXTCOLOR, COLOR_WINDOWTEXT);
  title_label_->SetColor(title_color);
  title_label_->SetMultiLine(true);
  title_label_->SetHorizontalAlignment(ChromeViews::Label::ALIGN_LEFT);

  description_label_->SetMultiLine(true);
  description_label_->SetHorizontalAlignment(ChromeViews::Label::ALIGN_LEFT);
}

void OptionsGroupView::SetHighlighted(bool highlighted) {
  highlighted_ = highlighted;
  SchedulePaint();
}

int OptionsGroupView::GetContentsWidth() const {
  return contents_->GetWidth();
}

///////////////////////////////////////////////////////////////////////////////
// OptionsGroupView, ChromeViews::View overrides:

void OptionsGroupView::Paint(ChromeCanvas* canvas) {
  if (highlighted_) {
    COLORREF infocolor = GetSysColor(COLOR_INFOBK);
    SkColor background_color = SkColorSetRGB(GetRValue(infocolor),
                                             GetGValue(infocolor),
                                             GetBValue(infocolor));
    int y_offset = kUnrelatedControlVerticalSpacing / 2;
    canvas->FillRectInt(background_color, 0, 0, GetWidth(),
                        GetHeight() - y_offset);
  }
}

void OptionsGroupView::ViewHierarchyChanged(bool is_add,
                                            ChromeViews::View* parent,
                                            ChromeViews::View* child) {
  if (is_add && child == this)
    Init();
}

///////////////////////////////////////////////////////////////////////////////
// OptionsGroupView, private:

void OptionsGroupView::Init() {
  using ChromeViews::GridLayout;
  using ChromeViews::ColumnSet;

  GridLayout* layout = new GridLayout(this);
  SetLayoutManager(layout);

  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
  ChromeFont font = rb.GetFont(ResourceBundle::BaseFont);
  std::wstring left_column_chars =
      l10n_util::GetString(IDS_OPTIONS_DIALOG_LEFT_COLUMN_WIDTH_CHARS);
  int left_column_width =
      font.ave_char_width() * _wtoi(left_column_chars.c_str());

  const int two_column_layout_id = 0;
  ColumnSet* column_set = layout->AddColumnSet(two_column_layout_id);
  column_set->AddPaddingColumn(0, kRelatedControlHorizontalSpacing);
  column_set->AddColumn(GridLayout::LEADING, GridLayout::LEADING, 0,
                        GridLayout::FIXED, left_column_width, 0);
  column_set->AddPaddingColumn(0, kOptionsGroupViewColumnSpacing);
  column_set->AddColumn(GridLayout::LEADING, GridLayout::LEADING, 1,
                        GridLayout::USE_PREF, 0, 0);
  column_set->AddPaddingColumn(0, kRelatedControlHorizontalSpacing);

  layout->AddPaddingRow(0, kRelatedControlVerticalSpacing);
  layout->StartRow(0, two_column_layout_id);
  // We need to do this so that the label can calculate an appropriate
  // preferred size (width * height) based on this width constraint. Otherwise
  // Label::GetPreferredSize will return 0,0 as the preferred size.
  title_label_->SetBounds(0, 0, left_column_width, 0);
  layout->AddView(title_label_);
  layout->AddView(contents_, 1, 3, GridLayout::FILL, GridLayout::FILL);
  layout->AddPaddingRow(0, kRelatedControlVerticalSpacing);
  layout->StartRow(1, two_column_layout_id);
  // See comment above for title_label_.
  description_label_->SetBounds(0, 0, left_column_width, 0);
  layout->AddView(description_label_);
  layout->AddPaddingRow(0, kUnrelatedControlVerticalSpacing);

  if (show_separator_) {
    const int single_column_layout_id = 1;
    column_set = layout->AddColumnSet(single_column_layout_id);
    column_set->AddColumn(GridLayout::FILL, GridLayout::CENTER, 1,
                          GridLayout::USE_PREF, 0, 0);

    separator_ = new ChromeViews::Separator;
    layout->StartRow(0, single_column_layout_id);
    layout->AddView(separator_);
  }
}