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C# StaticTextPointer.GetNextContextPosition方法代码示例

本文整理汇总了C#中System.Windows.Documents.StaticTextPointer.GetNextContextPosition方法的典型用法代码示例。如果您正苦于以下问题:C# StaticTextPointer.GetNextContextPosition方法的具体用法?C# StaticTextPointer.GetNextContextPosition怎么用?C# StaticTextPointer.GetNextContextPosition使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在System.Windows.Documents.StaticTextPointer的用法示例。


在下文中一共展示了StaticTextPointer.GetNextContextPosition方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: GetNextPropertyChangePosition

        /// <summary>
        /// Returns the closest neighboring TextPointer in an indicated
        /// direction where a property value calculated from an embedded
        /// object, scoping text element, or scoping highlight could
        /// change.
        /// </summary>
        /// <param name="textPosition">
        /// Position to query.
        /// </param>
        /// <param name="direction">
        /// Direction of content to query.
        /// </param>
        /// <returns>
        /// If the following symbol is TextPointerContext.EmbeddedElement,
        /// TextPointerContext.ElementBegin, or TextPointerContext.ElementEnd, returns
        /// a TextPointer exactly one symbol distant.
        ///
        /// If the following symbol is TextPointerContext.Text, the distance
        /// of the returned TextPointer is the minimum of the value returned
        /// by textPosition.GetTextLength and the distance to any highlight
        /// start or end edge.
        ///
        /// If the following symbol is TextPointerContext.None, returns null.
        /// </returns>
        internal virtual StaticTextPointer GetNextPropertyChangePosition(StaticTextPointer textPosition, LogicalDirection direction)
        {
            StaticTextPointer changePosition;
            StaticTextPointer characterRunEndPosition;

            switch (textPosition.GetPointerContext(direction))
            {
                case TextPointerContext.None:
                    changePosition = StaticTextPointer.Null;
                    break;

                case TextPointerContext.Text:
                    changePosition = GetNextHighlightChangePosition(textPosition, direction);
                    characterRunEndPosition = textPosition.GetNextContextPosition(LogicalDirection.Forward);

                    if (changePosition.IsNull ||
                        characterRunEndPosition.CompareTo(changePosition) < 0)
                    {
                        changePosition = characterRunEndPosition;
                    }

                    break;

                case TextPointerContext.EmbeddedElement:
                case TextPointerContext.ElementStart:
                case TextPointerContext.ElementEnd:
                default:
                    changePosition = textPosition.CreatePointer(+1);
                    break;
            }

            return changePosition;
        }
开发者ID:nlh774,项目名称:DotNetReferenceSource,代码行数:57,代码来源:Highlights.cs


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