/// <summary>
/// Move the camera so that its focusing on the found location
/// </summary>
/// <param Name="foundLocation">The location to focus on</param>
protected void NavigateToFoundPage(Location foundLocation)
{
Page foundPage = foundLocation.Page;
//The camera should first zoom out so that it is looking at both the start location and the found page
//And then zoom in so that it is only looking at the found page
RectangleF planeBounds = RectangleF.Union(Window.Canvas.Camera.ViewBounds, foundPage.GlobalBounds);
RectangleF pageBounds = foundPage.GlobalBounds;
PTransformActivity zoomOut = Window.Canvas.Camera.AnimateViewToCenterBounds(planeBounds, true, 400);
PTransformActivity zoomIn = Window.Canvas.Camera.AnimateViewToCenterBounds(pageBounds, true, 400);
//The camera action can happen faster without causing the user to lose track of where they are
//or getting motion sick if the zoom accelerates toward the middle of each animation
//and decelerates toward the end of the animation than if the animation moves at constant speed
zoomOut.SlowInSlowOut = true;
zoomIn.SlowInSlowOut = true;
//Order the animations
zoomIn.StartAfter(zoomOut);
}
/// <summary>
/// Recursively search every page in an array for a phrase, returning when it has been found
/// </summary>
/// <param Name="pages">The list of pages to search</param>
/// <param Name="location">Where to start the search</param>
/// <param Name="phrase">The phrase to search for</param>
/// <param Name="reverse">Whether the search should be backwards</param>
/// <returns>The location the phrase was found in, or null if it wasn't found</returns>
protected static Location SearchPages(Page[] pages, Location location, string phrase, bool reverse)
{
//Search for the phrase, and return it if found
Location output = SearchPage(location, phrase, reverse);
if (output != null) { return output; }
//Remove the first item of the array and return null if no pages remain
Page[] newPages = pages.Skip(1).ToArray();
if (newPages.Length == 0) { return null; }
//Start the next recursion
Location newLocation = new Location(location.Window, location.Document, newPages[0], null);
return SearchPages(newPages, newLocation, phrase, reverse);
}
/// <summary>
/// Set the keyboard focus to be the found location
/// </summary>
/// <param Name="foundLocation">The location to focus on</param>
protected void ActivateFoundPage(Location foundLocation)
{
Window.FindHandler.KeyFocus = foundLocation.Page.ToPickPath();
foundLocation.Page.Model.Select((int)foundLocation.CharIndex, 0);
}
/// <summary>
/// Search a page for a specific phrase
/// </summary>
/// <param Name="location">The location to begin the search at.</param>
/// <param Name="phrase">The phrase to search for</param>
/// <param Name="reverse">Whether the search should be forwards or backwards</param>
/// <returns>The location of the start of the phrase, or null if not found</returns>
protected static Location SearchPage(Location location, string phrase, bool reverse)
{
int startLoc = GetCharIndexFromLocation(location, reverse);
int phraseLocation, minFind;
if (reverse == false) //If the search is forwards
{
minFind = startLoc;
//Take the part of the text following the start location
string textPart = location.Page.Text.Substring(startLoc).ToLower();
//Find the first instance of the phrase within that text part
phraseLocation = startLoc + textPart.IndexOf(phrase);
}
else //If the search is backwards
{
minFind = 0;
//Take the part of the text preceding the start location
string textPart = location.Page.Text.Substring(0, startLoc).ToLower();
//Find the last instance of the phrase within that text part
phraseLocation = textPart.LastIndexOf(phrase);
}
//If the phrase was found, return the location of the
if (phraseLocation >= minFind) { return new Location(location.Window, location.Document, location.Page, phraseLocation); }
//IF the phrase wasn't found, return null
else { return null; }
}
/// <summary>
/// Recursively search all documents for a phrase
/// </summary>
/// <param Name="documents">The list of documents to search</param>
/// <param Name="location">The location to start searching in</param>
/// <param Name="phrase">The phrase to search for</param>
/// <param Name="reverse">Whether the search should be backwards</param>
/// <returns>The location of the phrase, or null if not found</returns>
protected static Location SearchDocuments(Document[] documents, Location location, string phrase, bool reverse)
{
//Search for the phrase, and return if found
Location output = SearchDocument(location, phrase, reverse);
if (output != null) { return output; }
//Remove the first document fro the array, and exit if no documents remain
Document[] newDocuments = documents.Skip(1).ToArray();
if (newDocuments.Length == 0) { return null; }
//Begin the next recursion
Location newLocation = new Location(location.Window, newDocuments[0], null, null);
return SearchDocuments(newDocuments, newLocation, phrase, reverse);
}
/// <summary>
/// Search every page of a document for a specific phrase
/// </summary>
/// <param Name="location">The location to start searching in</param>
/// <param Name="phrase">The phrase to search for</param>
/// <param Name="reverse">Whether the search should be backwards</param>
/// <returns>The found location, or null if nothing is found</returns>
protected static Location SearchDocument(Location location, string phrase, bool reverse)
{
//Get the list of pages of the document
Page[] pages = location.Document.Pages;
//If the document had no pages, exit
if (pages.Length == 0) { return null; }
//Put the pages in the correct order for searching
Page[] newPages = OrderPages(pages, location.PageIndex, reverse);
//Search the list of pages for the phrase
Location newLocation = new Location(location.Window, location.Document, newPages[0], location.CharIndex);
return SearchPages(newPages, newLocation, phrase, reverse);
}
/// <summary>
/// Find what character index the location object says to begin at
/// </summary>
/// <remarks>Because null is used as a wildcard, that can mean multiple things, it isn't as simple as just reading location.charindex</remarks>
/// <param Name="location">The location to check</param>
/// <param Name="reverse">Whether the search is backwards</param>
/// <returns>The location to begin searching at</returns>
protected static int GetCharIndexFromLocation(Location location, bool reverse)
{
//Ensure the user is searching a real page
if (location.Page == null) { throw new ArgumentException("Cannot find a character index from a null page"); }
//If an actual value has been provided, return that
if (location.CharIndex != null) { return (int)location.CharIndex; }
else //If the wildcard value was used
{
//If it's a forwards search, return the start of the document
if (reverse == false) { return 0; }
//If it's a backwards search, return the end of the document
else { return location.Page.Text.Length; }
}
}
/// <summary>
/// Find the next space before or after a specific location
/// </summary>
/// <param Name="location">Where to start searching</param>
/// <param Name="reverse">True if it should search backwards, false if it should search forwards</param>
/// <returns>The location of the next space in the relevant direction</returns>
protected static Location FindNearestWordEnd(Location location, bool reverse)
{
//Try to find a space in the current page in the relevant direction
Location output = SearchPage(location, " ", reverse);
//If it fails take either the start, or end, of the document as appropriate
if (output == null)
{
int newCharIndex;
if (reverse) { newCharIndex = 0; }
else { newCharIndex = location.Page.Text.Length; }
output = new Location(location.Window, location.Document, location.Page, newCharIndex);
}
return output;
}
