private void OnDecidingStartPosition(DecideStartPositionEventArgs args)
{
if (m_DecideStartPosEvent != null)
{
m_DecideStartPosEvent(this, args);
}
}
/// <summary>
/// 找下一個符合的字串。
/// </summary>
/// <returns></returns>
public bool FindNext()
{
string target = txtTarget.Text;
DecideStartPositionEventArgs dspArgs = new DecideStartPositionEventArgs();
OnDecidingStartPosition(dspArgs);
int lineIdx = dspArgs.LineIndex; // m_StartLineIndex;
int wordIdx = dspArgs.WordIndex; // m_StartWordIndex;
int i;
BrailleLine brLine;
if (lineIdx >= m_BrDoc.LineCount)
{
return(false);
}
brLine = m_BrDoc[lineIdx];
if (!this.IsFirstTime)
{
wordIdx++; // 若是找下一筆，則從目前位置的下一個字開始找起.
if (wordIdx >= brLine.WordCount)
{
lineIdx++;
if (lineIdx >= m_BrDoc.LineCount)
{
return(false);
}
wordIdx = 0;
}
}
while (true)
{
if (m_CaseSensitive)
{
i = brLine.IndexOf(target, wordIdx, StringComparison.Ordinal);
}
else
{
i = brLine.IndexOf(target, wordIdx, StringComparison.OrdinalIgnoreCase);
}
if (i >= 0 && i >= wordIdx) // 有找到?
{
m_FoundLineIndex = lineIdx;
m_FoundWordIndex = i;
// 觸發事件。
TargetFoundEventArgs args = new TargetFoundEventArgs(m_FoundLineIndex, m_FoundWordIndex);
OnTargetFound(args);
// 調整起始搜尋的位置（移至下一個字），以便下次搜尋下一筆。
m_StartLineIndex = m_FoundLineIndex;
m_StartWordIndex = m_FoundWordIndex;
IsFirstTime = false;
return(true);
}
// 沒找到，往下一個字移動.
wordIdx++;
if (wordIdx + target.Length >= brLine.WordCount)
{
lineIdx++;
if (lineIdx >= m_BrDoc.LineCount)
{
break;
}
brLine = m_BrDoc[lineIdx];
wordIdx = 0;
}
}
return(false);
}
