String settings. More...

#include <settings_internal.h>

Inheritance diagram for StringSettingDesc:

Public Types
typedef bool	PreChangeCheck(std::string &value)
	A check to be performed before the setting gets changed. More...

typedef void	PostChangeCallback(const std::string &value)
	A callback to denote that a setting has been changed. More...

Public Member Functions
	StringSettingDesc (const SaveLoad &save, SettingFlag flags, bool startup, const char *def, uint32_t max_length, PreChangeCheck pre_check, PostChangeCallback post_callback)

bool	IsStringSetting () const override
	Check whether this setting is an string type setting. More...

void	ChangeValue (const void *object, std::string &newval) const
	Handle changing a string value. More...

std::string	FormatValue (const void *object) const override
	Format the value of the setting associated with this object. More...

void	ParseValue (const IniItem item, void object) const override
	Parse/read the value from the Ini item into the setting associated with this object. More...

bool	IsSameValue (const IniItem item, void object) const override
	Check whether the value in the Ini item is the same as is saved in this setting in the object. More...

bool	IsDefaultValue (void *object) const override
	Check whether the value is the same as the default value. More...

void	ResetToDefault (void *object) const override
	Reset the setting to its default value.

const std::string &	Read (const void *object) const
	Read the string from the the actual setting. More...

Public Member Functions inherited from SettingDesc
	SettingDesc (const SaveLoad &save, SettingFlag flags, bool startup)

bool	IsEditable (bool do_command=false) const
	Check whether the setting is editable in the current gamemode. More...

SettingType	GetType () const
	Return the type of the setting. More...

constexpr const std::string &	GetName () const
	Get the name of this setting. More...

virtual bool	IsIntSetting () const
	Check whether this setting is an integer type setting. More...

const struct IntSettingDesc *	AsIntSetting () const
	Get the setting description of this setting as an integer setting. More...

const struct StringSettingDesc *	AsStringSetting () const
	Get the setting description of this setting as a string setting. More...

Data Fields
std::string	def
	Default value given when none is present.

uint32_t	max_length
	Maximum length of the string, 0 means no maximum length.

PreChangeCheck *	pre_check
	Callback to check for the validity of the setting.

PostChangeCallback *	post_callback
	Callback when the setting has been changed.

Data Fields inherited from SettingDesc
SettingFlag	flags
	Handles how a setting would show up in the GUI (text/currency, etc.).

bool	startup
	Setting has to be loaded directly at startup?.

SaveLoad	save
	Internal structure (going to savegame, parts to config).

Private Member Functions
void	MakeValueValid (std::string &str) const
	Make the value valid given the limitations of this setting. More...

void	Write (const void *object, const std::string &str) const
	Write a string to the actual setting. More...

Detailed Description

String settings.

Definition at line 318 of file settings_internal.h.

Member Typedef Documentation

◆ PostChangeCallback

typedef void StringSettingDesc::PostChangeCallback(const std::string &value)

A callback to denote that a setting has been changed.

Parameters

The	new value for the setting.

Definition at line 332 of file settings_internal.h.

◆ PreChangeCheck

typedef bool StringSettingDesc::PreChangeCheck(std::string &value)

A check to be performed before the setting gets changed.

The passed string may be changed by the check if that is important, for example to remove unwanted white space. The return value denotes whether the value, potentially after the changes, is allowed to be used/set in the configuration.

Parameters

value The prospective new value for the setting.

Returns: True when the setting is accepted.

Definition at line 327 of file settings_internal.h.

Member Function Documentation

◆ ChangeValue()

void StringSettingDesc::ChangeValue	(	const void *	object,
		std::string &	newval
	)		const

Handle changing a string value.

This performs validation of the input value and calls the appropriate callbacks, and saves it when the value is changed.

Parameters

object	The object the setting is in.
newval	The new value for the setting.

Definition at line 1838 of file settings.cpp.

References MakeValueValid(), post_callback, pre_check, and Write().

◆ FormatValue()

std::string StringSettingDesc::FormatValue ( const void * object ) const

overridevirtual

Format the value of the setting associated with this object.

Parameters

buf	The before of the buffer to format into.
last	The end of the buffer to format into.
object	The object the setting is in.

Implements SettingDesc.

Definition at line 760 of file settings.cpp.

References SaveLoad::conv, GetVarMemType(), Read(), SettingDesc::save, SLE_VAR_STR, and SLE_VAR_STRQ.

◆ IsDefaultValue()

bool StringSettingDesc::IsDefaultValue ( void * object ) const

overridevirtual

Check whether the value is the same as the default value.

Parameters

object The object the setting is in.

Returns: true iff the value is the default value.

Implements SettingDesc.

Definition at line 786 of file settings.cpp.

References def, and Read().

◆ IsSameValue()

bool StringSettingDesc::IsSameValue	(	const IniItem *	item,
		void *	object
	)		const

overridevirtual

Check whether the value in the Ini item is the same as is saved in this setting in the object.

It might be that determining whether the value is the same is way more expensive than just writing the value. In those cases this function may unconditionally return false even though the value might be the same as in the Ini item.

Parameters

item	The Ini item with the content of this setting.
object	The object the setting is in.

Returns: True if the value is definitely the same (might be false when the same).

Implements SettingDesc.

Definition at line 776 of file settings.cpp.

References SaveLoad::conv, GetVarMemType(), Read(), SettingDesc::save, SLE_VAR_STRQ, and IniItem::value.

◆ IsStringSetting()

bool StringSettingDesc::IsStringSetting ( ) const

inlineoverridevirtual

Check whether this setting is an string type setting.

Returns: True when the underlying type is a string.

Reimplemented from SettingDesc.

Definition at line 344 of file settings_internal.h.

◆ MakeValueValid()

void StringSettingDesc::MakeValueValid ( std::string & str ) const

private

Make the value valid given the limitations of this setting.

In the case of string settings this is ensuring the string contains only accepted Utf8 characters and is at most the maximum length defined in this setting.

Parameters