refactor: split large files into partial classes by concern
Split LinuxApplication into Input and Lifecycle partials. Extract SkiaView into Accessibility, Drawing, and Input partials. Split SkiaEntry and SkiaEditor into Drawing and Input partials. Extract TextRenderingHelper from SkiaRenderingEngine. Create dedicated files for SkiaAbsoluteLayout, SkiaGrid, and SkiaStackLayout. This reduces file sizes from 40K+ lines to manageable units organized by responsibility.
This commit is contained in:
303
Views/SkiaEntry.Drawing.cs
Normal file
303
Views/SkiaEntry.Drawing.cs
Normal file
@@ -0,0 +1,303 @@
|
||||
// Licensed to the .NET Foundation under one or more agreements.
|
||||
// The .NET Foundation licenses this file to you under the MIT license.
|
||||
|
||||
using System;
|
||||
using Microsoft.Maui.Graphics;
|
||||
using Microsoft.Maui.Platform.Linux.Rendering;
|
||||
using SkiaSharp;
|
||||
|
||||
namespace Microsoft.Maui.Platform;
|
||||
|
||||
public partial class SkiaEntry
|
||||
{
|
||||
protected override void DrawBackground(SKCanvas canvas, SKRect bounds)
|
||||
{
|
||||
// Skip base background drawing if Entry is transparent
|
||||
// (transparent Entry is likely inside a Border that handles appearance)
|
||||
var bgColor = ToSKColor(EntryBackgroundColor);
|
||||
var baseBgColor = GetEffectiveBackgroundColor();
|
||||
if (bgColor.Alpha < 10 && baseBgColor.Alpha < 10)
|
||||
return;
|
||||
|
||||
// Otherwise let base class draw
|
||||
base.DrawBackground(canvas, bounds);
|
||||
}
|
||||
|
||||
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
|
||||
{
|
||||
var bgColor = ToSKColor(EntryBackgroundColor);
|
||||
var isTransparent = bgColor.Alpha < 10; // Consider nearly transparent as transparent
|
||||
|
||||
if (!isTransparent)
|
||||
{
|
||||
// Draw background
|
||||
using var bgPaint = new SKPaint
|
||||
{
|
||||
Color = bgColor,
|
||||
IsAntialias = true,
|
||||
Style = SKPaintStyle.Fill
|
||||
};
|
||||
|
||||
var rect = new SKRoundRect(bounds, (float)CornerRadius);
|
||||
canvas.DrawRoundRect(rect, bgPaint);
|
||||
|
||||
// Draw border
|
||||
var borderColor = IsFocused ? ToSKColor(FocusedBorderColor) : ToSKColor(BorderColor);
|
||||
var borderWidth = IsFocused ? (float)BorderWidth + 1 : (float)BorderWidth;
|
||||
|
||||
using var borderPaint = new SKPaint
|
||||
{
|
||||
Color = borderColor,
|
||||
IsAntialias = true,
|
||||
Style = SKPaintStyle.Stroke,
|
||||
StrokeWidth = borderWidth
|
||||
};
|
||||
canvas.DrawRoundRect(rect, borderPaint);
|
||||
}
|
||||
|
||||
// Calculate content bounds
|
||||
var contentBounds = new SKRect(
|
||||
bounds.Left + (float)Padding.Left,
|
||||
bounds.Top + (float)Padding.Top,
|
||||
bounds.Right - (float)Padding.Right,
|
||||
bounds.Bottom - (float)Padding.Bottom);
|
||||
|
||||
// Reserve space for clear button if shown
|
||||
var clearButtonSize = 20f;
|
||||
var clearButtonMargin = 8f;
|
||||
var showClear = ShouldShowClearButton();
|
||||
if (showClear)
|
||||
{
|
||||
contentBounds.Right -= clearButtonSize + clearButtonMargin;
|
||||
}
|
||||
|
||||
// Set up clipping for text area
|
||||
canvas.Save();
|
||||
canvas.ClipRect(contentBounds);
|
||||
|
||||
var fontStyle = GetFontStyle();
|
||||
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(GetEffectiveFontFamily(), fontStyle)
|
||||
?? SKTypeface.Default;
|
||||
|
||||
using var font = new SKFont(typeface, (float)FontSize);
|
||||
using var paint = new SKPaint(font) { IsAntialias = true };
|
||||
|
||||
var displayText = GetDisplayText();
|
||||
// Append pre-edit text at cursor position for IME composition display
|
||||
var preEditInsertPos = Math.Min(_cursorPosition, displayText.Length);
|
||||
var displayTextWithPreEdit = string.IsNullOrEmpty(_preEditText)
|
||||
? displayText
|
||||
: displayText.Insert(preEditInsertPos, _preEditText);
|
||||
var hasText = !string.IsNullOrEmpty(displayTextWithPreEdit);
|
||||
|
||||
if (hasText)
|
||||
{
|
||||
paint.Color = GetEffectiveTextColor();
|
||||
|
||||
// Measure text to cursor position for scrolling
|
||||
var textToCursor = displayText.Substring(0, Math.Min(_cursorPosition, displayText.Length));
|
||||
var cursorX = paint.MeasureText(textToCursor);
|
||||
|
||||
// Auto-scroll to keep cursor visible
|
||||
if (cursorX - _scrollOffset > contentBounds.Width - 10)
|
||||
{
|
||||
_scrollOffset = cursorX - contentBounds.Width + 10;
|
||||
}
|
||||
else if (cursorX - _scrollOffset < 0)
|
||||
{
|
||||
_scrollOffset = cursorX;
|
||||
}
|
||||
|
||||
// Draw selection (check != 0 to handle both forward and backward selection)
|
||||
if (IsFocused && _selectionLength != 0)
|
||||
{
|
||||
DrawSelection(canvas, paint, displayText, contentBounds);
|
||||
}
|
||||
|
||||
// Calculate text position based on vertical alignment
|
||||
var textBounds = new SKRect();
|
||||
paint.MeasureText(displayText, ref textBounds);
|
||||
|
||||
float x = contentBounds.Left - _scrollOffset;
|
||||
float y = VerticalTextAlignment switch
|
||||
{
|
||||
TextAlignment.Start => contentBounds.Top - textBounds.Top,
|
||||
TextAlignment.End => contentBounds.Bottom - textBounds.Bottom,
|
||||
_ => contentBounds.MidY - textBounds.MidY // Center
|
||||
};
|
||||
|
||||
// Draw the text with font fallback for emoji/CJK support
|
||||
DrawTextWithFallback(canvas, displayTextWithPreEdit, x, y, paint, typeface);
|
||||
|
||||
// Draw underline for pre-edit (composition) text
|
||||
if (!string.IsNullOrEmpty(_preEditText))
|
||||
{
|
||||
DrawPreEditUnderline(canvas, paint, displayText, x, y, contentBounds);
|
||||
}
|
||||
|
||||
// Draw cursor
|
||||
if (IsFocused && !IsReadOnly && _cursorVisible)
|
||||
{
|
||||
DrawCursor(canvas, paint, displayText, contentBounds);
|
||||
}
|
||||
}
|
||||
else if (!string.IsNullOrEmpty(Placeholder))
|
||||
{
|
||||
// Draw placeholder
|
||||
paint.Color = GetEffectivePlaceholderColor();
|
||||
|
||||
var textBounds = new SKRect();
|
||||
paint.MeasureText(Placeholder, ref textBounds);
|
||||
|
||||
float x = contentBounds.Left;
|
||||
float y = contentBounds.MidY - textBounds.MidY;
|
||||
|
||||
canvas.DrawText(Placeholder, x, y, paint);
|
||||
}
|
||||
else if (IsFocused && !IsReadOnly && _cursorVisible)
|
||||
{
|
||||
// Draw cursor even with no text
|
||||
DrawCursor(canvas, paint, "", contentBounds);
|
||||
}
|
||||
|
||||
canvas.Restore();
|
||||
|
||||
// Draw clear button if applicable
|
||||
if (showClear)
|
||||
{
|
||||
DrawClearButton(canvas, bounds, clearButtonSize, clearButtonMargin);
|
||||
}
|
||||
}
|
||||
|
||||
private bool ShouldShowClearButton()
|
||||
{
|
||||
if (string.IsNullOrEmpty(Text)) return false;
|
||||
|
||||
// Check both legacy ShowClearButton and MAUI ClearButtonVisibility
|
||||
if (ShowClearButton && IsFocused) return true;
|
||||
|
||||
return ClearButtonVisibility switch
|
||||
{
|
||||
ClearButtonVisibility.WhileEditing => IsFocused,
|
||||
ClearButtonVisibility.Never => false,
|
||||
_ => false
|
||||
};
|
||||
}
|
||||
|
||||
private void DrawClearButton(SKCanvas canvas, SKRect bounds, float size, float margin)
|
||||
{
|
||||
var centerX = bounds.Right - margin - size / 2;
|
||||
var centerY = bounds.MidY;
|
||||
|
||||
// Draw circle background
|
||||
using var circlePaint = new SKPaint
|
||||
{
|
||||
Color = SkiaTheme.Gray400SK,
|
||||
IsAntialias = true,
|
||||
Style = SKPaintStyle.Fill
|
||||
};
|
||||
canvas.DrawCircle(centerX, centerY, size / 2 - 2, circlePaint);
|
||||
|
||||
// Draw X
|
||||
using var xPaint = new SKPaint
|
||||
{
|
||||
Color = SkiaTheme.BackgroundWhiteSK,
|
||||
IsAntialias = true,
|
||||
Style = SKPaintStyle.Stroke,
|
||||
StrokeWidth = 2,
|
||||
StrokeCap = SKStrokeCap.Round
|
||||
};
|
||||
|
||||
var offset = size / 4 - 1;
|
||||
canvas.DrawLine(centerX - offset, centerY - offset, centerX + offset, centerY + offset, xPaint);
|
||||
canvas.DrawLine(centerX - offset, centerY + offset, centerX + offset, centerY - offset, xPaint);
|
||||
}
|
||||
|
||||
private void DrawSelection(SKCanvas canvas, SKPaint paint, string displayText, SKRect bounds)
|
||||
{
|
||||
var selStart = Math.Min(_selectionStart, _selectionStart + _selectionLength);
|
||||
var selEnd = Math.Max(_selectionStart, _selectionStart + _selectionLength);
|
||||
|
||||
var textToStart = displayText.Substring(0, selStart);
|
||||
var textToEnd = displayText.Substring(0, selEnd);
|
||||
|
||||
var startX = bounds.Left - _scrollOffset + paint.MeasureText(textToStart);
|
||||
var endX = bounds.Left - _scrollOffset + paint.MeasureText(textToEnd);
|
||||
|
||||
using var selPaint = new SKPaint
|
||||
{
|
||||
Color = ToSKColor(SelectionColor),
|
||||
Style = SKPaintStyle.Fill
|
||||
};
|
||||
|
||||
canvas.DrawRect(startX, bounds.Top, endX - startX, bounds.Height, selPaint);
|
||||
}
|
||||
|
||||
private void DrawCursor(SKCanvas canvas, SKPaint paint, string displayText, SKRect bounds)
|
||||
{
|
||||
var textToCursor = displayText.Substring(0, Math.Min(_cursorPosition, displayText.Length));
|
||||
var cursorX = bounds.Left - _scrollOffset + paint.MeasureText(textToCursor);
|
||||
|
||||
using var cursorPaint = new SKPaint
|
||||
{
|
||||
Color = ToSKColor(CursorColor),
|
||||
StrokeWidth = 2,
|
||||
IsAntialias = true
|
||||
};
|
||||
|
||||
canvas.DrawLine(cursorX, bounds.Top + 2, cursorX, bounds.Bottom - 2, cursorPaint);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Draws text with font fallback for emoji, CJK, and other scripts.
|
||||
/// </summary>
|
||||
private void DrawTextWithFallback(SKCanvas canvas, string text, float x, float y, SKPaint paint, SKTypeface preferredTypeface)
|
||||
=> TextRenderingHelper.DrawTextWithFallback(canvas, text, x, y, paint, preferredTypeface, (float)FontSize);
|
||||
|
||||
/// <summary>
|
||||
/// Draws underline for IME pre-edit (composition) text.
|
||||
/// </summary>
|
||||
private void DrawPreEditUnderline(SKCanvas canvas, SKPaint paint, string displayText, float x, float y, SKRect bounds)
|
||||
=> TextRenderingHelper.DrawPreEditUnderline(canvas, paint, displayText, _cursorPosition, _preEditText, x, y);
|
||||
|
||||
private void ResetCursorBlink()
|
||||
{
|
||||
_cursorBlinkTime = DateTime.UtcNow;
|
||||
_cursorVisible = true;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Updates cursor blink animation.
|
||||
/// </summary>
|
||||
public void UpdateCursorBlink()
|
||||
{
|
||||
if (!IsFocused) return;
|
||||
|
||||
var elapsed = (DateTime.UtcNow - _cursorBlinkTime).TotalMilliseconds;
|
||||
var newVisible = ((int)(elapsed / 500) % 2) == 0;
|
||||
|
||||
if (newVisible != _cursorVisible)
|
||||
{
|
||||
_cursorVisible = newVisible;
|
||||
Invalidate();
|
||||
}
|
||||
}
|
||||
|
||||
protected override Size MeasureOverride(Size availableSize)
|
||||
{
|
||||
var fontStyle = GetFontStyle();
|
||||
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(GetEffectiveFontFamily(), fontStyle)
|
||||
?? SKTypeface.Default;
|
||||
|
||||
using var font = new SKFont(typeface, (float)FontSize);
|
||||
|
||||
// Use font metrics for consistent height regardless of text content
|
||||
// This prevents size changes when placeholder disappears or text changes
|
||||
var metrics = font.Metrics;
|
||||
var textHeight = metrics.Descent - metrics.Ascent + metrics.Leading;
|
||||
|
||||
return new Size(
|
||||
200, // Default width, will be overridden by layout
|
||||
textHeight + Padding.Top + Padding.Bottom + BorderWidth * 2);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user