public void ProcessFunctionKey(FunctionKeys functionKey)
{
Log.DebugFormat("Processing captured function key '{0}'", functionKey);
lastTextChangeWasSuggestion = false;
switch (functionKey)
{
case FunctionKeys.BackMany:
if (!string.IsNullOrEmpty(Text))
{
var backManyCount = Text.CountBackToLastCharCategoryBoundary();
dictionaryService.DecrementEntryUsageCount(Text.Substring(Text.Length - backManyCount, backManyCount).Trim());
var textAfterBackMany = Text.Substring(0, Text.Length - backManyCount);
var textChangedByBackMany = Text != textAfterBackMany;
Text = textAfterBackMany;
if (backManyCount == 0)
{
backManyCount = 1; //Always publish at least one backspace
}
for (int i = 0; i < backManyCount; i++)
{
PublishKeyPress(FunctionKeys.BackOne);
ReleaseUnlockedKeys();
}
if (textChangedByBackMany ||
string.IsNullOrEmpty(Text))
{
AutoPressShiftIfAppropriate();
}
StoreLastTextChange(null);
GenerateAutoCompleteSuggestions();
Log.Debug("Suppressing next auto space.");
suppressNextAutoSpace = true;
}
else
{
//Scratchpad is empty, but publish 1 backspace anyway, as per the behaviour for 'BackOne'
PublishKeyPress(FunctionKeys.BackOne);
}
break;
case FunctionKeys.BackOne:
var backOneCount = string.IsNullOrEmpty(lastTextChange)
? 1 //Default to removing one character if no lastTextChange
: lastTextChange.Length;
var textChangedByBackOne = false;
if (!string.IsNullOrEmpty(Text))
{
if (Text.Length < backOneCount)
{
backOneCount = Text.Length; //Coallesce backCount if somehow the Text length is less
}
var textAfterBackOne = Text.Substring(0, Text.Length - backOneCount);
textChangedByBackOne = Text != textAfterBackOne;
if (backOneCount > 1)
{
//Removing more than one character - only decrement removed string
dictionaryService.DecrementEntryUsageCount(Text.Substring(Text.Length - backOneCount, backOneCount).Trim());
}
else if (!string.IsNullOrEmpty(lastTextChange) &&
lastTextChange.Length == 1 &&
!char.IsWhiteSpace(lastTextChange[0]))
{
dictionaryService.DecrementEntryUsageCount(Text.InProgressWord(Text.Length)); //We are removing a non-whitespace character - decrement the in progress word
dictionaryService.IncrementEntryUsageCount(textAfterBackOne.InProgressWord(Text.Length)); //And increment the in progress word that is left after the removal
}
Text = textAfterBackOne;
}
for (int i = 0; i < backOneCount; i++)
{
PublishKeyPress(FunctionKeys.BackOne);
ReleaseUnlockedKeys();
}
if (textChangedByBackOne ||
string.IsNullOrEmpty(Text))
{
AutoPressShiftIfAppropriate();
}
StoreLastTextChange(null);
GenerateAutoCompleteSuggestions();
Log.Debug("Suppressing next auto space.");
suppressNextAutoSpace = true;
break;
case FunctionKeys.ClearScratchpad:
Text = null;
StoreLastTextChange(null);
ClearSuggestions();
AutoPressShiftIfAppropriate();
Log.Debug("Suppressing next auto space.");
suppressNextAutoSpace = true;
break;
case FunctionKeys.Suggestion1:
SwapLastTextChangeForSuggestion(0);
lastTextChangeWasSuggestion = true;
break;
case FunctionKeys.Suggestion2:
SwapLastTextChangeForSuggestion(1);
lastTextChangeWasSuggestion = true;
break;
case FunctionKeys.Suggestion3:
SwapLastTextChangeForSuggestion(2);
lastTextChangeWasSuggestion = true;
break;
case FunctionKeys.Suggestion4:
SwapLastTextChangeForSuggestion(3);
lastTextChangeWasSuggestion = true;
break;
case FunctionKeys.Suggestion5:
SwapLastTextChangeForSuggestion(4);
lastTextChangeWasSuggestion = true;
break;
case FunctionKeys.Suggestion6:
SwapLastTextChangeForSuggestion(5);
lastTextChangeWasSuggestion = true;
break;
default:
if (functionKey.ToVirtualKeyCode() != null)
{
//Key corresponds to physical keyboard key
GenerateAutoCompleteSuggestions();
//If the key cannot be pressed or locked down (these are handled in
//ReactToPublishableKeyDownStateChanges) then publish it and release unlocked keys
var keyValue = new KeyValue(functionKey);
if (!KeyValues.KeysWhichCanBePressedOrLockedDown.Contains(keyValue))
{
PublishKeyPress(functionKey);
ReleaseUnlockedKeys();
}
}
if (functionKey == FunctionKeys.LeftShift)
{
shiftStateSetAutomatically = false;
}
break;
}
}