Add word reselection feature

This change adds support for word reselection.

By definition, word reselection means the ability to reselect any of the
existing words in the text by touching/clicking the word.

This change implements previously unused functionality provided by
QPlatformInputContext::invokeMethod(). This functionality is essential
for handling touch events inside a pre-edit text. The virtual keyboard
example app was previously blocking this function by overriding the
default touch handling for TextInput and TextEdit components.

Word reselection is currently implemented for the following input methods:
- HunspellInputMethod
- LipiInputMethod (by inheriting HunspellInputMethod)
- T9WriteInputMethod.

Change-Id: I66731e2d2831d4b3d43dac0503cd564ffb4d490f
Reviewed-by: Mitch Curtis <mitch.curtis@theqtcompany.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/virtualkeyboard/hunspellinputmethod_p.h b/src/virtualkeyboard/hunspellinputmethod_p.h
index 18ab2a0d..79fdcda0 100644
--- a/src/virtualkeyboard/hunspellinputmethod_p.h
+++ b/src/virtualkeyboard/hunspellinputmethod_p.h
@@ -36,6 +36,8 @@ public:
     bool clearSuggestions();
     bool hasSuggestions() const;
     bool isAutoSpaceAllowed() const;
+    bool isValidInputChar(const QChar &c) const;
+    bool isJoiner(const QChar &c) const;
 
     HunspellInputMethod *q_ptr;
     QScopedPointer<HunspellWorker> hunspellWorker;