/// <summary>
/// 内部查询
/// </summary>
/// <param name="searchText">关键词（可以作为正则表达式）</param>
public async Task <List <InsideSearchItem> > GetInsideSearchResultAsync(string searchText)
{
if (Chapters == null || Chapters.Count == 0)
{
throw new InvalidCastException("Chapters not loaded");
}
else if (string.IsNullOrEmpty(searchText))
{
throw new ArgumentNullException("Search text is null or empty");
}
var result = new List <InsideSearchItem>();
var regex = new Regex(searchText, RegexOptions.IgnoreCase);
if (ReaderType == ReaderType.Txt && !string.IsNullOrEmpty(_txtContent))
{
var matches = regex.Matches(_txtContent);
if (matches.Count > 0)
{
var tasks = new List <Task>();
for (int i = 0; i < matches.Count; i++)
{
int index = matches[i].Index;
string value = matches[i].Value;
if (value.Length > 60)
{
value = value.Substring(0, 60).Trim();
}
tasks.Add(Task.Run(() =>
{
string display = GetDisplayText(_txtContent, index, value);
var chapter = Chapters.Where(p => p.StartLength <= index).OrderByDescending(p => p.Index).FirstOrDefault();
if (chapter == null)
{
return;
}
var item = new InsideSearchItem();
item.Chapter = chapter;
item.DisplayText = display;
item.SearchText = value;
item.AddonLength = index - chapter.StartLength;
item.DisplayText = item.DisplayText.Trim();
result.Add(item);
}));
}
await Task.WhenAll(tasks.ToArray());
}
}
else if (ReaderType == ReaderType.Epub && _epubContent != null)
{
var orders = _epubContent.SpecialResources.HtmlInReadingOrder;
var tasks = new List <Task>();
foreach (var order in orders)
{
tasks.Add(Task.Run(() =>
{
string text = Regex.Replace(order.TextContent, @"<[^>]*>", string.Empty);
var matches = regex.Matches(text);
if (matches.Count > 0)
{
var chapter = Chapters.Where(p => p.Link.Contains(order.AbsolutePath, StringComparison.OrdinalIgnoreCase)).FirstOrDefault();
if (chapter == null)
{
chapter = GetLastEpubChapter(order);
if (chapter == null)
{
return;
}
}
for (int i = 0; i < matches.Count; i++)
{
int index = matches[i].Index;
string value = matches[i].Value;
if (value.Length > 60)
{
value = value.Substring(0, 60).Trim();
}
string display = GetDisplayText(text, index, value);
var item = new InsideSearchItem();
item.Chapter = chapter;
item.DisplayText = display.Trim();
item.SearchText = value;
item.AddonLength = index;
result.Add(item);
}
}
}));
}
await Task.WhenAll(tasks.ToArray());
}
else
{
var chapters = Chapters.Where(p => regex.IsMatch(p.Title));
if (chapters.Count() > 0)
{
foreach (var chapter in chapters)
{
var item = new InsideSearchItem();
item.Chapter = chapter;
item.DisplayText = chapter.Title;
item.SearchText = regex.Match(chapter.Title).Value;
item.AddonLength = 0;
result.Add(item);
}
}
}
return(result.OrderBy(p => p.Chapter.Index).ThenBy(p => p.AddonLength).ToList());
}
/// <summary>
/// 加载搜索结果对应的位置（需要与当前书籍匹配）
/// </summary>
/// <param name="search">搜索结果</param>
public void LoadSearchItem(InsideSearchItem search)
{
SetProgress(search.Chapter, search.AddonLength);
}