QuickLook/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Controls/SearchPanel.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:search="clr-namespace:ICSharpCode.AvalonEdit.Search;assembly=ICSharpCode.AvalonEdit">

    <Style TargetType="search:SearchPanel">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type search:SearchPanel}">
                    <!--  For compatibility, the Card itself is not used for the time being.  -->
                    <!--  Background="{DynamicResource CardBackgroundBrush}"  -->
                    <!--  BorderBrush="{DynamicResource CardBorderBrush}"  -->
                    <Border Margin="0,-1,16,0"
                            Padding="2"
                            HorizontalAlignment="Right"
                            VerticalAlignment="Top"
                            Background="{DynamicResource WindowBackground}"
                            BorderBrush="#102E2E3E"
                            BorderThickness="1"
                            CornerRadius="4"
                            Cursor="Arrow">
                        <StackPanel Orientation="Horizontal">
                            <TextBox Name="PART_searchTextBox"
                                     Width="150"
                                     Height="29"
                                     Padding="4,5,0,0"
                                     FocusVisualStyle="{x:Null}"
                                     Focusable="True">
                                <TextBox.Text>
                                    <Binding Path="SearchPattern"
                                             RelativeSource="{RelativeSource TemplatedParent}"
                                             UpdateSourceTrigger="PropertyChanged">
                                        <Binding.ValidationRules>
                                            <ExceptionValidationRule />
                                        </Binding.ValidationRules>
                                    </Binding>
                                </TextBox.Text>
                            </TextBox>
                            <search:DropDownButton Height="24">
                                <search:DropDownButton.DropDownContent>
                                    <Popup Name="PART_dropdownPopup"
                                           AllowsTransparency="True"
                                           StaysOpen="False">
                                        <Border Background="{DynamicResource WindowBackground}"
                                                BorderBrush="{DynamicResource CardBorderBrush}"
                                                BorderThickness="1"
                                                CornerRadius="4">
                                            <StackPanel Orientation="Vertical">
                                                <CheckBox Margin="3"
                                                          Content="{Binding Localization.MatchCaseText, RelativeSource={RelativeSource TemplatedParent}}"
                                                          IsChecked="{Binding MatchCase, RelativeSource={RelativeSource TemplatedParent}}" />
                                                <CheckBox Margin="3"
                                                          Content="{Binding Localization.MatchWholeWordsText, RelativeSource={RelativeSource TemplatedParent}}"
                                                          IsChecked="{Binding WholeWords, RelativeSource={RelativeSource TemplatedParent}}" />
                                                <CheckBox Margin="3"
                                                          Content="{Binding Localization.UseRegexText, RelativeSource={RelativeSource TemplatedParent}}"
                                                          IsChecked="{Binding UseRegex, RelativeSource={RelativeSource TemplatedParent}}" />
                                            </StackPanel>
                                        </Border>
                                    </Popup>
                                </search:DropDownButton.DropDownContent>
                            </search:DropDownButton>
                            <Button Width="24"
                                    Height="24"
                                    Margin="3,3,0,3"
                                    Padding="0"
                                    Command="search:SearchCommands.FindPrevious"
                                    ToolTip="{Binding Localization.FindPreviousText, RelativeSource={RelativeSource TemplatedParent}}">
                                <!--  ChevronUp  -->
                                <TextBlock HorizontalAlignment="Center"
                                           VerticalAlignment="Center"
                                           FontFamily="{DynamicResource SymbolThemeFontFamily}"
                                           FontSize="12"
                                           Text="&#xe70e;" />
                            </Button>
                            <Button Width="24"
                                    Height="24"
                                    Margin="3"
                                    Padding="0"
                                    Command="search:SearchCommands.FindNext"
                                    ToolTip="{Binding Localization.FindNextText, RelativeSource={RelativeSource TemplatedParent}}">
                                <!--  ChevronDown  -->
                                <TextBlock HorizontalAlignment="Center"
                                           VerticalAlignment="Center"
                                           FontFamily="{DynamicResource SymbolThemeFontFamily}"
                                           FontSize="12"
                                           Text="&#xe70d;" />
                            </Button>
                            <Button Width="16"
                                    Height="16"
                                    Padding="0"
                                    HorizontalAlignment="Right"
                                    VerticalAlignment="Top"
                                    HorizontalContentAlignment="Center"
                                    VerticalContentAlignment="Center"
                                    Command="search:SearchCommands.CloseSearchPanel"
                                    Focusable="False">
                                <!--  CalculatorMultiply  -->
                                <TextBlock HorizontalAlignment="Center"
                                           VerticalAlignment="Center"
                                           FontFamily="{DynamicResource SymbolThemeFontFamily}"
                                           FontSize="10"
                                           Text="&#xe947;" />
                            </Button>
                        </StackPanel>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>