public bool Replace(string searchString, string replaceString, bool matchCase, bool wholeWord, bool searchUp)
{
// Synchronize first so the selection length is correct
this.Selection.SynchronizeSelection();
// Only perform a replace if something is already selected
if ((this.Selection.Type == HtmlSelectionType.TextSelection) && (this.Selection.Length > 0))
{
NativeMethods.IHTMLTxtRange selection = this.Selection.Selection as NativeMethods.IHTMLTxtRange;
// Set up the flags for matching case and whole word search
int flags = (matchCase ? 0x4 : 0) | (wholeWord ? 0x2 : 0);
int direction = searchUp ? -10000000 : 10000000;
// Ensure that the selected text conatins the search string
if (selection.FindText(searchString, direction, flags))
{
// If it does, replace the text
selection.SetText(replaceString);
}
}
// Find the next instance of the string
return(this.Find(searchString, matchCase, wholeWord, searchUp));
}
/// <summary>Finds the specified string in the content of the control and selects it if it exists.</summary>
/// <param name="searchString">The string to find</param>
/// <param name="matchCase">Set to true to match casing of the string.</param>
/// <param name="wholeWord">Set to true to only find whole words.</param>
/// <returns></returns>
public bool Find(string searchString, bool matchCase, bool wholeWord, bool searchUp)
{
NativeMethods.IHTMLSelectionObject selectionObj = this.site.Document.GetSelection();
// Check if a selection actually exists.
bool selectionExists = false;
if (selectionObj != null)
{
selectionExists = selectionObj.GetSelectionType().Equals("Text");
}
NativeMethods.IHTMLTxtRange textRange = null;
if (selectionExists)
{
object o = selectionObj.CreateRange();
textRange = o as NativeMethods.IHTMLTxtRange;
}
if (textRange == null)
{
// If no selection exists, select the entire body.
NativeMethods.IHtmlBodyElement bodyElement = this.site.Document.GetBody() as NativeMethods.IHtmlBodyElement;
Debug.Assert(bodyElement != null, "Couldn't get body element in HtmlControl.Find");
selectionExists = false;
textRange = bodyElement.createTextRange();
}
// Set up the bounds of the search.
if (searchUp)
{
// If we're search up in the document.
if (selectionExists)
{
// If a selection exists, move the range's end to one character before the selection.
textRange.MoveEnd("character", -1);
}
// Move the range's beginning to the start of the document.
int temp = 1;
while (temp == 1)
{
temp = textRange.MoveStart("textedit", -1);
}
}
else
{
// If we're searching down in the document.
if (selectionExists)
{
// If a selection exists, start one char after the selection.
textRange.MoveStart("character", 1);
}
// Move the range's end to the end of the document.
int temp = 1;
while (temp == 1)
{
temp = textRange.MoveEnd("textedit", 1);
}
}
// Set up the flags for matching case and whole word search
int flags = (matchCase ? 0x4 : 0) | (wholeWord ? 0x2 : 0);
int direction = searchUp ? -10000000 : 10000000;
// Do the search.
bool success = textRange.FindText(searchString, direction, flags);
if (success)
{
// If we succeeded, select the text, scroll it into view, and we're done!
textRange.Select();
textRange.ScrollIntoView(true);
return(true);
}
else if (selectionExists)
{
// If we only searched a portion of the document we need to wrap around the document...
textRange = selectionObj.CreateRange() as NativeMethods.IHTMLTxtRange;
// Set up the bounds of the search.
if (searchUp)
{
// If we're searching up in the document. Start one char after the selection.
textRange.MoveStart("character", 1);
// Move the range's end to the end of the document.
int temp = 1;
while (temp == 1)
{
temp = textRange.MoveEnd("textedit", 1);
}
}
else
{
// If we're searching down in the document. Move the range's end to one character before the selection.
textRange.MoveEnd("character", -1);
// Move the range's beginning to the start of the document.
int temp = 1;
while (temp == 1)
{
temp = textRange.MoveStart("textedit", -1);
}
}
success = textRange.FindText(searchString, direction, flags);
if (success)
{
// If we succeeded, select the text, scroll it into view, and we're done!
textRange.Select();
textRange.ScrollIntoView(true);
return(true);
}
}
return(false);
}