add:i18n

Ink Canvas/Helpers/AutoFontSizeHelper.cs

@@ -0,0 +1,252 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+using System.Windows.Threading;
+using System.Windows.Markup;
+using System.Windows.Media.TextFormatting;
+using System.Windows.Media.Imaging;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Shapes;
+using System.Windows.Data;
+using System.Windows.Ink;
+using System.Windows.Interop;
+using System.Windows.Media.Animation;
+using System.Windows.Navigation;
+
+namespace Ink_Canvas.Helpers
+{
+    /// <summary>
+    /// 让 TextBlock 在可用宽度不足时自动缩小字号（只缩小不放大），用于避免英文等长文本被截断。
+    /// </summary>
+    public static class AutoFontSizeHelper
+    {
+        public static readonly DependencyProperty IsEnabledProperty =
+            DependencyProperty.RegisterAttached(
+                "IsEnabled",
+                typeof(bool),
+                typeof(AutoFontSizeHelper),
+                new PropertyMetadata(false, OnIsEnabledChanged));
+
+        public static void SetIsEnabled(DependencyObject element, bool value) => element.SetValue(IsEnabledProperty, value);
+        public static bool GetIsEnabled(DependencyObject element) => (bool)element.GetValue(IsEnabledProperty);
+
+        public static readonly DependencyProperty MinFontSizeProperty =
+            DependencyProperty.RegisterAttached(
+                "MinFontSize",
+                typeof(double),
+                typeof(AutoFontSizeHelper),
+                new PropertyMetadata(6d, OnSizingPropertyChanged));
+
+        public static void SetMinFontSize(DependencyObject element, double value) => element.SetValue(MinFontSizeProperty, value);
+        public static double GetMinFontSize(DependencyObject element) => (double)element.GetValue(MinFontSizeProperty);
+
+        public static readonly DependencyProperty MaxFontSizeProperty =
+            DependencyProperty.RegisterAttached(
+                "MaxFontSize",
+                typeof(double),
+                typeof(AutoFontSizeHelper),
+                new PropertyMetadata(double.NaN, OnSizingPropertyChanged));
+
+        public static void SetMaxFontSize(DependencyObject element, double value) => element.SetValue(MaxFontSizeProperty, value);
+        public static double GetMaxFontSize(DependencyObject element) => (double)element.GetValue(MaxFontSizeProperty);
+
+        public static readonly DependencyProperty StepProperty =
+            DependencyProperty.RegisterAttached(
+                "Step",
+                typeof(double),
+                typeof(AutoFontSizeHelper),
+                new PropertyMetadata(0.5d, OnSizingPropertyChanged));
+
+        public static void SetStep(DependencyObject element, double value) => element.SetValue(StepProperty, value);
+        public static double GetStep(DependencyObject element) => (double)element.GetValue(StepProperty);
+
+        private static readonly DependencyProperty IsAdjustingProperty =
+            DependencyProperty.RegisterAttached(
+                "IsAdjusting",
+                typeof(bool),
+                typeof(AutoFontSizeHelper),
+                new PropertyMetadata(false));
+
+        private static void SetIsAdjusting(DependencyObject element, bool value) => element.SetValue(IsAdjustingProperty, value);
+        private static bool GetIsAdjusting(DependencyObject element) => (bool)element.GetValue(IsAdjustingProperty);
+
+        private static void OnIsEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var tb = d as TextBlock;
+            if (tb == null) return;
+
+            if ((bool)e.NewValue)
+            {
+                tb.SizeChanged += TextBlock_OnSizeChanged;
+                tb.Loaded += TextBlock_OnLoaded;
+                tb.Unloaded += TextBlock_OnUnloaded;
+
+                try
+                {
+                    var dpd = DependencyPropertyDescriptor.FromProperty(TextBlock.TextProperty, typeof(TextBlock));
+                    dpd?.AddValueChanged(tb, TextBlock_OnTextChanged);
+                }
+                catch
+                {
+                    // 忽略：极端情况下 descriptor 可能不可用
+                }
+
+                // 让第一次布局完成后再做一次调整（避免 ActualWidth=0）
+                tb.Dispatcher.BeginInvoke(new Action(() => TryAdjust(tb)), DispatcherPriority.Loaded);
+            }
+            else
+            {
+                tb.SizeChanged -= TextBlock_OnSizeChanged;
+                tb.Loaded -= TextBlock_OnLoaded;
+                tb.Unloaded -= TextBlock_OnUnloaded;
+
+                try
+                {
+                    var dpd = DependencyPropertyDescriptor.FromProperty(TextBlock.TextProperty, typeof(TextBlock));
+                    dpd?.RemoveValueChanged(tb, TextBlock_OnTextChanged);
+                }
+                catch
+                {
+                }
+            }
+        }
+
+        private static void OnSizingPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            if (d is TextBlock tb && GetIsEnabled(tb))
+            {
+                tb.Dispatcher.BeginInvoke(new Action(() => TryAdjust(tb)), DispatcherPriority.Loaded);
+            }
+        }
+
+        private static void TextBlock_OnLoaded(object sender, RoutedEventArgs e)
+        {
+            if (sender is TextBlock tb) tb.Dispatcher.BeginInvoke(new Action(() => TryAdjust(tb)), DispatcherPriority.Loaded);
+        }
+
+        private static void TextBlock_OnUnloaded(object sender, RoutedEventArgs e)
+        {
+            // 这里不做额外处理；事件解绑由 IsEnabled 关闭或对象销毁处理
+        }
+
+        private static void TextBlock_OnSizeChanged(object sender, SizeChangedEventArgs e)
+        {
+            if (sender is TextBlock tb) TryAdjust(tb);
+        }
+
+        private static void TextBlock_OnTextChanged(object sender, EventArgs e)
+        {
+            if (sender is TextBlock tb) tb.Dispatcher.BeginInvoke(new Action(() => TryAdjust(tb)), DispatcherPriority.Loaded);
+        }
+
+        private static void TryAdjust(TextBlock tb)
+        {
+            if (tb == null) return;
+            if (!GetIsEnabled(tb)) return;
+            if (GetIsAdjusting(tb)) return;
+
+            // 没有可用宽度时跳过
+            var availableWidth = tb.ActualWidth;
+            if (double.IsNaN(availableWidth) || availableWidth <= 1) return;
+
+            // 文本为空时不需要调整
+            var text = tb.Text;
+            if (string.IsNullOrEmpty(text)) return;
+
+            var min = GetMinFontSize(tb);
+            if (double.IsNaN(min) || min <= 0) min = 6d;
+
+            var step = GetStep(tb);
+            if (double.IsNaN(step) || step <= 0.01) step = 0.5d;
+
+            var max = GetMaxFontSize(tb);
+            if (double.IsNaN(max) || max <= 0)
+            {
+                max = tb.FontSize;
+            }
+
+            if (double.IsNaN(max) || max <= 0) return;
+
+            // 只做“缩小不放大”
+            var startFont = Math.Min(tb.FontSize, max);
+            if (startFont < min) startFont = min;
+
+            SetIsAdjusting(tb, true);
+            try
+            {
+                // 如果当前已合适，直接回到 max（但不超过原本 fontSize），避免之前缩小后再变短不恢复
+                // 注意：恢复也只在不超过 max 的范围内
+                var desiredAtMax = MeasureTextWidth(tb, text, max);
+                if (desiredAtMax > 0 && desiredAtMax <= availableWidth + 0.5)
+                {
+                    if (tb.FontSize != max) tb.FontSize = max;
+                    return;
+                }
+
+                double font = startFont;
+                double desired = MeasureTextWidth(tb, text, font);
+                if (desired <= 0) return;
+
+                // 逐步减小直到适配或触底
+                while (font > min && desired > availableWidth + 0.5)
+                {
+                    font = Math.Max(min, font - step);
+                    desired = MeasureTextWidth(tb, text, font);
+                    if (desired <= 0) break;
+                }
+
+                if (!double.IsNaN(font) && font > 0 && Math.Abs(tb.FontSize - font) > 0.01)
+                {
+                    tb.FontSize = font;
+                }
+            }
+            finally
+            {
+                SetIsAdjusting(tb, false);
+            }
+        }
+
+        private static double MeasureTextWidth(TextBlock tb, string text, double fontSize)
+        {
+            try
+            {
+                var dpi = VisualTreeHelper.GetDpi(tb);
+                var culture = CultureInfo.CurrentUICulture;
+
+                // 使用 TextBlock 自身的语言/流向
+                if (tb.Language != null)
+                {
+                    try
+                    {
+                        culture = tb.Language.GetEquivalentCulture();
+                    }
+                    catch
+                    {
+                    }
+                }
+
+                var typeface = new Typeface(tb.FontFamily, tb.FontStyle, tb.FontWeight, tb.FontStretch);
+                var formatted = new FormattedText(
+                    text,
+                    culture,
+                    tb.FlowDirection,
+                    typeface,
+                    fontSize,
+                    tb.Foreground,
+                    dpi.PixelsPerDip);
+
+                // 这里用包含尾随空白的宽度更接近实际布局
+                return formatted.WidthIncludingTrailingWhitespace;
+            }
+            catch
+            {
+                return -1;
+            }
+        }
+    }
+}
+

Ink Canvas/MainWindow.xaml

@@ -10,6 +10,7 @@
         xmlns:Windows="clr-namespace:Ink_Canvas.Windows"
         xmlns:props="clr-namespace:Ink_Canvas.Properties"
         xmlns:i18n="clr-namespace:Ink_Canvas.MarkupExtensions"
+        xmlns:helpers="clr-namespace:Ink_Canvas.Helpers"
         mc:Ignorable="d"
         AllowsTransparency="True"
         WindowStyle="None"
@@ -47,6 +48,34 @@
             <c:IntNumberToString x:Key="IntNumberToString" />
             <c:IntNumberToString2 x:Key="IntNumberToString2" />
 
+            <!-- 浮动栏/白板栏：英文等长文本自动缩小避免截断 -->
+            <Style x:Key="AutoFitFloatBarLabel12" TargetType="TextBlock">
+                <Setter Property="TextWrapping" Value="NoWrap" />
+                <Setter Property="TextAlignment" Value="Center" />
+                <Setter Property="helpers:AutoFontSizeHelper.IsEnabled" Value="True" />
+                <Setter Property="helpers:AutoFontSizeHelper.MinFontSize" Value="7" />
+                <Setter Property="helpers:AutoFontSizeHelper.MaxFontSize" Value="12" />
+                <Setter Property="helpers:AutoFontSizeHelper.Step" Value="0.5" />
+            </Style>
+
+            <Style x:Key="AutoFitFloatBarLabel9" TargetType="TextBlock">
+                <Setter Property="TextWrapping" Value="NoWrap" />
+                <Setter Property="TextAlignment" Value="Center" />
+                <Setter Property="helpers:AutoFontSizeHelper.IsEnabled" Value="True" />
+                <Setter Property="helpers:AutoFontSizeHelper.MinFontSize" Value="6" />
+                <Setter Property="helpers:AutoFontSizeHelper.MaxFontSize" Value="9" />
+                <Setter Property="helpers:AutoFontSizeHelper.Step" Value="0.5" />
+            </Style>
+
+            <Style x:Key="AutoFitFloatBarLabel8" TargetType="TextBlock">
+                <Setter Property="TextWrapping" Value="NoWrap" />
+                <Setter Property="TextAlignment" Value="Center" />
+                <Setter Property="helpers:AutoFontSizeHelper.IsEnabled" Value="True" />
+                <Setter Property="helpers:AutoFontSizeHelper.MinFontSize" Value="5" />
+                <Setter Property="helpers:AutoFontSizeHelper.MaxFontSize" Value="8" />
+                <Setter Property="helpers:AutoFontSizeHelper.Step" Value="0.5" />
+            </Style>
+
             <!-- Navigation Button Style -->
             <Style x:Key="NavButton" TargetType="Button">
                 <Setter Property="Background" Value="Transparent"/>
@@ -6726,7 +6755,8 @@
                                                     </DrawingImage>
                                                 </Image.Source>
                                             </Image>
-                                            <TextBlock Text="{i18n:I18n Key=Board_Undo}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom" HorizontalAlignment="Center" FontSize="12" />
+                                            <TextBlock Text="{i18n:I18n Key=Board_Undo}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom" HorizontalAlignment="Center" FontSize="12"
+                                                       Style="{StaticResource AutoFitFloatBarLabel12}" />
                                         </Grid>
                                     </Border>
                                     <Border x:Name="BoardRedo" Width="60" Height="50" CornerRadius="0,5,5,0" MouseDown="Border_MouseDown" MouseUp="SymbolIconRedo_MouseUp" BorderThickness="0,1,1,1" BorderBrush="{DynamicResource BoardFloatBarBorderBrush}" IsEnabled="{Binding ElementName=BtnRedo, Path=IsEnabled}" Background="{DynamicResource BoardFloatBarBackground}" Opacity="1">
@@ -6744,7 +6774,7 @@
                                                 </Image.Source>
                                             </Image>
                                             <TextBlock Text="{i18n:I18n Key=Board_Redo}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom"
-                                                       HorizontalAlignment="Center" FontSize="12" />
+                                                       HorizontalAlignment="Center" FontSize="12" Style="{StaticResource AutoFitFloatBarLabel12}" />
                                         </Grid>
                                     </Border>
                                 </ui:SimpleStackPanel>
@@ -6771,7 +6801,7 @@
                                                 </Image.Source>
                                             </Image>
                                             <TextBlock Text="{i18n:I18n Key=Board_Tools}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom"
-                                                       HorizontalAlignment="Center" FontSize="12" />
+                                                       HorizontalAlignment="Center" FontSize="12" Style="{StaticResource AutoFitFloatBarLabel12}" />
                                         </Grid>
                                     </Border>
                                     <Border>
@@ -7024,7 +7054,7 @@
                                                 </Image.Source>
                                             </Image>
                                             <TextBlock Text="{i18n:I18n Key=Board_Exit}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom"
-                                                       HorizontalAlignment="Center" FontSize="12" />
+                                                       HorizontalAlignment="Center" FontSize="12" Style="{StaticResource AutoFitFloatBarLabel12}" />
                                         </Grid>
                                     </Border>
                                 </ui:SimpleStackPanel>
@@ -7058,7 +7088,7 @@
                                         </Image.Source>
                                     </Image>
                                     <TextBlock Text="{i18n:I18n Key=Board_NewPage}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom"
-                                               HorizontalAlignment="Center" FontSize="12" />
+                                               HorizontalAlignment="Center" FontSize="12" Style="{StaticResource AutoFitFloatBarLabel12}" />
                                 </Grid>
                             </Border>
                             <Border CornerRadius="5,5,5,5" Background="{DynamicResource BoardFloatBarBackground}" Margin="0,0,0,0">
@@ -7086,7 +7116,8 @@
                                             </Image>
                                             <TextBlock Text="{i18n:I18n Key=Board_PreviousPage}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom"
                                                        HorizontalAlignment="Center" FontSize="12"
-                                                       Name="BtnRightWhiteBoardSwitchPreviousLabel" />
+                                                       Name="BtnRightWhiteBoardSwitchPreviousLabel"
+                                                       Style="{StaticResource AutoFitFloatBarLabel12}" />
                                         </Grid>
                                     </Border>
                                     <Border Width="75" Height="50" MouseUp="BtnWhiteBoardPageIndex_Click"
@@ -7099,7 +7130,7 @@
                                                        Margin="0,-1,0,0" FontSize="17" FontWeight="Bold"
                                                        TextAlignment="Center" />
                                             <TextBlock Text="{i18n:I18n Key=Board_Page}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom"
-                                                       HorizontalAlignment="Center" FontSize="12" />
+                                                       HorizontalAlignment="Center" FontSize="12" Style="{StaticResource AutoFitFloatBarLabel12}" />
                                         </Grid>
                                     </Border>
                                     <Grid Width="0" Margin="0,0,0,5">
@@ -7183,7 +7214,8 @@
                                             </Image>
                                             <TextBlock Text="{i18n:I18n Key=Board_NextPage}" Foreground="{DynamicResource FloatBarForeground}" VerticalAlignment="Bottom"
                                                        HorizontalAlignment="Center" FontSize="12"
-                                                       Name="BtnRightWhiteBoardSwitchNextLabel" />
+                                                       Name="BtnRightWhiteBoardSwitchNextLabel"
+                                                       Style="{StaticResource AutoFitFloatBarLabel12}" />
                                         </Grid>
                                     </Border>
                                 </ui:SimpleStackPanel>
@@ -9540,7 +9572,8 @@
                                         <TextBlock x:Name="UndoToolbarTextBlock" Text="{i18n:I18n Key=Board_Undo}"
                                                    Opacity="{Binding ElementName=BtnUndo, Path=IsEnabled, Converter={StaticResource IsEnabledToOpacityConverter}}"
                                                    Foreground="{DynamicResource FloatBarForeground}" FontSize="8" Margin="0,1,0,0"
-                                                   TextAlignment="Center" />
+                                                   TextAlignment="Center"
+                                                   Style="{StaticResource AutoFitFloatBarLabel8}" />
                                     </ui:SimpleStackPanel>
                                     <ui:SimpleStackPanel
                                         Name="SymbolIconRedo"
@@ -9568,7 +9601,8 @@
                                         <TextBlock x:Name="RedoToolbarTextBlock" Text="{i18n:I18n Key=Board_Redo}"
                                                    Opacity="{Binding ElementName=BtnRedo, Path=IsEnabled, Converter={StaticResource IsEnabledToOpacityConverter}}"
                                                    Foreground="{DynamicResource FloatBarForeground}" FontSize="8" Margin="0,1,0,0"
-                                                   TextAlignment="Center" />
+                                                   TextAlignment="Center"
+                                                   Style="{StaticResource AutoFitFloatBarLabel8}" />
                                     </ui:SimpleStackPanel>
                                     <ui:SimpleStackPanel
                                         Name="CursorWithDelFloatingBarBtn"
@@ -9591,7 +9625,8 @@
                                             </Image.Source>
                                         </Image>
                                         <TextBlock x:Name="ClearAndMouseToolbarTextBlock" Text="{i18n:I18n Key=FloatingBar_ClearAndMouse}" Foreground="{DynamicResource FloatBarForeground}"
-                                                   FontSize="8" Margin="0,1,0,0" TextAlignment="Center" />
+                                                   FontSize="8" Margin="0,1,0,0" TextAlignment="Center"
+                                                   Style="{StaticResource AutoFitFloatBarLabel8}" />
                                     </ui:SimpleStackPanel>
                                 </ui:SimpleStackPanel>
                                 <Grid Width="0">
@@ -9660,7 +9695,8 @@
                                                                 <TextBlock x:Name="CircleEraserTabButtonText"
                                                                            Foreground="{DynamicResource FloatBarForeground}" FontWeight="Medium"
                                                                            FontSize="9" TextAlignment="Center"
-                                                                           Text="{i18n:I18n Key=Board_EraserShape_Circle}" />
+                                                                           Text="{i18n:I18n Key=Board_EraserShape_Circle}"
+                                                                           Style="{StaticResource AutoFitFloatBarLabel9}" />
                                                             </ui:SimpleStackPanel>
                                                         </ui:SimpleStackPanel>
                                                     </Canvas>
@@ -9684,7 +9720,8 @@
                                                                 <TextBlock x:Name="RectangleEraserTabButtonText"
                                                                            Foreground="{DynamicResource FloatBarForeground}" FontWeight="Medium"
                                                                            FontSize="9" TextAlignment="Center"
-                                                                           Text="{i18n:I18n Key=Board_EraserShape_Blackboard}" />
+                                                                           Text="{i18n:I18n Key=Board_EraserShape_Blackboard}"
+                                                                           Style="{StaticResource AutoFitFloatBarLabel9}" />
                                                             </ui:SimpleStackPanel>
                                                         </ui:SimpleStackPanel>
                                                     </Canvas>
@@ -9752,7 +9789,8 @@
                                             </Image.Source>
                                         </Image>
                                         <TextBlock x:Name="WhiteboardToolbarTextBlock" Text="{i18n:I18n Key=FloatingBar_Whiteboard}" Foreground="{DynamicResource FloatBarForeground}"
-                                                   FontSize="8" Margin="0,1,0,0" TextAlignment="Center" />
+                                                   FontSize="8" Margin="0,1,0,0" TextAlignment="Center"
+                                                   Style="{StaticResource AutoFitFloatBarLabel8}" />
                                     </ui:SimpleStackPanel>
                                     <ui:SimpleStackPanel
                                         Name="ToolsFloatingBarBtn"
@@ -9776,7 +9814,8 @@
                                         </Image>
                                         <TextBlock x:Name="ToolsToolbarTextBlock" Text="{i18n:I18n Key=Board_Tools}" Foreground="{DynamicResource FloatBarForeground}"
                                                    FontSize="8"
-                                                   Margin="0,1,0,0" TextAlignment="Center" />
+                                                   Margin="0,1,0,0" TextAlignment="Center"
+                                                   Style="{StaticResource AutoFitFloatBarLabel8}" />
                                     </ui:SimpleStackPanel>
                                     <ui:SimpleStackPanel
                                         x:Name="Fold_Icon"
@@ -9800,7 +9839,8 @@
                                         </Image>
                                         <TextBlock x:Name="HideToolbarTextBlock" Text="{i18n:I18n Key=FloatingBar_Hide}" Foreground="{DynamicResource FloatBarForeground}"
                                                    FontSize="8"
-                                                   Margin="0,1,0,0" TextAlignment="Center" />
+                                                   Margin="0,1,0,0" TextAlignment="Center"
+                                                   Style="{StaticResource AutoFitFloatBarLabel8}" />
                                     </ui:SimpleStackPanel>
                                     <Grid Width="0">
                                         <Border ClipToBounds="True" Name="BorderTools" Margin="-103,-156,-16,37"