#include <selector.h>

Inheritance diagram for Selector:

Collaboration diagram for Selector:

Public Member Functions
	Selector (Configuration , ContextTracker )

	~Selector ()

std::vector< std::string >	select (Prediction)

void	update ()

void	set_logger (const std::string &value)

void	set_suggestions (const std::string &value)

void	set_repeat_suggestions (const std::string &value)

void	set_greedy_suggestion_threshold (const std::string &value)

size_t	get_suggestions () const

bool	get_repeat_suggestions () const

size_t	get_greedy_suggestion_threshold () const

virtual void	update (const Observable *variable)

Public Member Functions inherited from Observer
virtual	~Observer ()

Static Public Attributes
static const char *	LOGGER = "Presage.Selector.LOGGER"

static const char *	SUGGESTIONS = "Presage.Selector.SUGGESTIONS"

static const char *	REPEAT_SUGGESTIONS = "Presage.Selector.REPEAT_SUGGESTIONS"

static const char *	GREEDY_SUGGESTION_THRESHOLD = "Presage.Selector.GREEDY_SUGGESTION_THRESHOLD"

Private Types
typedef void(Selector::*	mbr_func_ptr_t) (const std::string &)

Private Member Functions
void	updateSuggestedWords (const std::vector< std::string > &)

void	clearSuggestedWords ()

void	repetitionFilter (std::vector< std::string > &)

void	thresholdFilter (std::vector< std::string > &)

Private Attributes
std::map< std::string, mbr_func_ptr_t >	dispatch_map

size_t	suggestions

bool	repeat_suggestions

size_t	greedy_suggestion_threshold

StringSet	suggestedWords

std::string	previous_prefix

ContextTracker *	contextTracker

Configuration *	config

Logger< char >	logger

Dispatcher< Selector >	dispatcher

Additional Inherited Members
Protected Member Functions inherited from Observer
	Observer ()

Detailed Description

Selector selects which suggestions supplied by Predictor should be given to the user.

Suggestions selection is performed based on users preferences. Preferences are read from configuration and provided by Configuration.

Selected suggestions are returned to the outside world.

Customisable settings:

SUGGESTIONS: integer, number of suggestions to be selected

REPEAT_SUGGESTIONS: boolean, controls whether a predicted token should be suggested to the user once or multiple times, if its prediction occurs within the same predictive context. A predictive context corresponds to the set of suggestions computed when predicting the same word (token). Some users may fail to see the desired suggestion and might benefit from the fact that the same token will be suggested again if it ranks high in the prediction. If this option is enabled, Selector remembers which tokens have been suggested in the current token and filters out suggestions that have already been selected.

GREEDY_SUGGESTION_THRESHOLD: integer, only tokens whose completion is longer than the specified number of characters are selected. The rationale behind this option is that a user might prefer to be offered a longer word before a shorter word, because typing a longer word is more time-consuming.

For example, given a threshold=2 and prefix="automa", token "automatically" would be suggested, while "automatic" would not.

Definition at line 80 of file selector.h.

Member Typedef Documentation

◆ mbr_func_ptr_t

typedef void(Selector::* Selector::mbr_func_ptr_t) (const std::string &)

private

Definition at line 107 of file selector.h.

Constructor & Destructor Documentation

◆ Selector()

Selector::Selector	(	Configuration *	configuration,
		ContextTracker *	ct
	)

Definition at line 34 of file selector.cpp.

References config, contextTracker, dispatcher, Configuration::find(), ContextTracker::getPrefix(), GREEDY_SUGGESTION_THRESHOLD, LOGGER, Dispatcher< class_t >::map(), previous_prefix, REPEAT_SUGGESTIONS, set_greedy_suggestion_threshold(), set_logger(), set_repeat_suggestions(), set_suggestions(), and SUGGESTIONS.

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◆ ~Selector()

Selector::~Selector ( )

Definition at line 50 of file selector.cpp.

Member Function Documentation

◆ clearSuggestedWords()

void Selector::clearSuggestedWords ( )

private

Clear the set of previously selected suggestions.

Definition at line 131 of file selector.cpp.

References endl(), logger, and suggestedWords.

Referenced by select(), and update().

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◆ get_greedy_suggestion_threshold()

size_t Selector::get_greedy_suggestion_threshold ( ) const

Definition at line 256 of file selector.cpp.

References greedy_suggestion_threshold.

◆ get_repeat_suggestions()

bool Selector::get_repeat_suggestions ( ) const

Definition at line 251 of file selector.cpp.

References repeat_suggestions.

◆ get_suggestions()

size_t Selector::get_suggestions ( ) const

Definition at line 246 of file selector.cpp.

References suggestions.

Referenced by Presage::predict().

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◆ repetitionFilter()

void Selector::repetitionFilter ( std::vector< std::string > & v )

private

Filters out suggestions that have previously been selected in the current context.

This filter removes the suggestions that have previously been selected. The set of suggestions that were previously selected is stored in suggestedWords. This filters removes the words that are contained in both

Parameters

v	and suggestedWords.

Definition at line 145 of file selector.cpp.

References endl(), logger, and suggestedWords.

Referenced by select().

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◆ select()

std::vector< std::string > Selector::select ( Prediction p )

Definition at line 55 of file selector.cpp.

References clearSuggestedWords(), ContextTracker::contextChange(), contextTracker, endl(), Prediction::getSuggestion(), Suggestion::getWord(), greedy_suggestion_threshold, logger, repeat_suggestions, repetitionFilter(), Prediction::size(), suggestions, thresholdFilter(), and updateSuggestedWords().

Referenced by Presage::predict().

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◆ set_greedy_suggestion_threshold()

void Selector::set_greedy_suggestion_threshold ( const std::string & value )

Set SUGGESTION_THRESHOLD option.

Definition at line 233 of file selector.cpp.

References endl(), greedy_suggestion_threshold, logger, and Utility::toInt().

Referenced by Selector().

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◆ set_logger()

void Selector::set_logger ( const std::string & value )

Set LOGGER option.

Definition at line 194 of file selector.cpp.

References endl(), logger, and setlevel().

Referenced by Selector().

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◆ set_repeat_suggestions()

void Selector::set_repeat_suggestions ( const std::string & value )

Set REPEAT_SUGGESTION option.

Definition at line 221 of file selector.cpp.

References endl(), Utility::isYes(), logger, and repeat_suggestions.

Referenced by Selector().

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◆ set_suggestions()

void Selector::set_suggestions ( const std::string & value )

Set SUGGESTIONS option.

Definition at line 204 of file selector.cpp.

References endl(), logger, suggestions, and Utility::toInt().

Referenced by Selector().

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◆ thresholdFilter()

void Selector::thresholdFilter ( std::vector< std::string > & v )

private

Filters out suggestions that could save fewer than THRESHOLD keystrokes.

Assuming prefix.size() == n, suggestion.size() == m, and THRESHOLD == t, then this filter removes those suggestions for which the following condition is true: (m - n) < t

Definition at line 170 of file selector.cpp.

References contextTracker, endl(), ContextTracker::getPrefix(), greedy_suggestion_threshold, and logger.

Referenced by select().

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◆ update() [1/2]

void Selector::update ( )

Trigger update of the suggested tokens cache

Definition at line 97 of file selector.cpp.

References clearSuggestedWords(), ContextTracker::contextChange(), and contextTracker.

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◆ update() [2/2]

void Selector::update ( const Observable * variable )

virtual

Implements Observer.

Definition at line 261 of file selector.cpp.

References Dispatcher< class_t >::dispatch(), dispatcher, endl(), Observable::get_name(), and logger.

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◆ updateSuggestedWords()

void Selector::updateSuggestedWords ( const std::vector< std::string > & v )

private

Adds suggestions to the set of previously selected suggestions.

Definition at line 109 of file selector.cpp.

References endl(), logger, and suggestedWords.

Referenced by select().

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const char * Selector::SUGGESTIONS = "Presage.Selector.SUGGESTIONS"

static

Definition at line 99 of file selector.h.

Referenced by Selector().

◆ suggestions

size_t Selector::suggestions

private

Definition at line 110 of file selector.h.

Referenced by get_suggestions(), select(), and set_suggestions().

The documentation for this class was generated from the following files:

F:/msys64/home/MatteoV/git/presage/src/lib/core/selector.h
F:/msys64/home/MatteoV/git/presage/src/lib/core/selector.cpp

Public Member Functions

Static Public Attributes

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ mbr_func_ptr_t

Constructor & Destructor Documentation

◆ Selector()

◆ ~Selector()

Member Function Documentation

◆ clearSuggestedWords()

◆ get_greedy_suggestion_threshold()

◆ get_repeat_suggestions()

◆ get_suggestions()

◆ repetitionFilter()

◆ select()

◆ set_greedy_suggestion_threshold()

◆ set_logger()

◆ set_repeat_suggestions()

◆ set_suggestions()

◆ thresholdFilter()

◆ update() [1/2]

◆ update() [2/2]

◆ updateSuggestedWords()

Member Data Documentation

◆ config

◆ contextTracker

◆ dispatch_map

◆ dispatcher

◆ GREEDY_SUGGESTION_THRESHOLD

◆ greedy_suggestion_threshold

◆ LOGGER

◆ logger

◆ previous_prefix

◆ REPEAT_SUGGESTIONS

◆ repeat_suggestions

◆ suggestedWords

◆ SUGGESTIONS

◆ suggestions