mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-26 21:51:08 +00:00
imcontext: Convert docs
This commit is contained in:
Matthias Clasen
Emmanuele Bassi
parent
3eeaef0834
commit
e2cab4d406
@ -24,77 +24,45 @@
|
||||
#include "gtkintl.h"
|
||||
|
||||
/**
|
||||
* SECTION:gtkimcontext
|
||||
* @title: GtkIMContext
|
||||
* @short_description: Base class for input method contexts
|
||||
* @include: gtk/gtk.h,gtk/gtkimmodule.h
|
||||
* GtkIMContext:
|
||||
*
|
||||
* #GtkIMContext defines the interface for GTK input methods. An input method
|
||||
* is used by GTK text input widgets like #GtkEntry to map from key events to
|
||||
* Unicode character strings.
|
||||
* `GtkIMContext` defines the interface for GTK input methods.
|
||||
*
|
||||
* The default input method can be set programmatically via the
|
||||
* #GtkSettings:gtk-im-module GtkSettings property. Alternatively, you may set
|
||||
* the GTK_IM_MODULE environment variable as documented in
|
||||
* [Running GTK Applications][gtk-running].
|
||||
* `GtkIMContext` is used by GTK text input widgets like `GtkText`
|
||||
* to map from key events to Unicode character strings.
|
||||
*
|
||||
* The #GtkEntry #GtkEntry:im-module and #GtkTextView #GtkTextView:im-module
|
||||
* properties may also be used to set input methods for specific widget
|
||||
* instances. For instance, a certain entry widget might be expected to contain
|
||||
* certain characters which would be easier to input with a certain input
|
||||
* method.
|
||||
* By default, GTK uses a platform-dependent default input method.
|
||||
* On Windows, the default implementation is IME-based and on Wayland,
|
||||
* it is using the Wayland text protocol. The choice can be overridden
|
||||
* programmatically via the [property@Gtk.Settings:gtk-im-module] setting.
|
||||
* Users may set the `GTK_IM_MODULE` environment variable to override the
|
||||
* default.
|
||||
*
|
||||
* An input method may consume multiple key events in sequence and finally
|
||||
* output the composed result. This is called preediting, and an input method
|
||||
* may provide feedback about this process by displaying the intermediate
|
||||
* composition states as preedit text. For instance, the default GTK input
|
||||
* method implements the input of arbitrary Unicode code points by holding down
|
||||
* the Control and Shift keys and then typing “U” followed by the hexadecimal
|
||||
* digits of the code point. When releasing the Control and Shift keys,
|
||||
* preediting ends and the character is inserted as text. Ctrl+Shift+u20AC for
|
||||
* example results in the € sign.
|
||||
* Text widgets have a :im-module property (e.g. [property@Gtk.TextView:im-module])
|
||||
* that may also be used to set input methods for specific widget instances.
|
||||
* For instance, a certain entry widget might be expected to contain
|
||||
* certain characters which would be easier to input with a specific
|
||||
* input method.
|
||||
*
|
||||
* An input method may consume multiple key events in sequence before finally
|
||||
* outputting the composed result. This is called *preediting*, and an input
|
||||
* method may provide feedback about this process by displaying the intermediate
|
||||
* composition states as preedit text.
|
||||
*
|
||||
* For instance, the built-in GTK input method `GtkIMContextSimple` implements
|
||||
* the input of arbitrary Unicode code points by holding down the
|
||||
* <kbd>Control</kbd> and <kbd>Shift</kbd> keys and then typing <kbd>U</kbd>
|
||||
* followed by the hexadecimal digits of the code point. When releasing the
|
||||
* <kbd>Control</kbd> and <kbd>Shift</kbd> keys, preediting ends and the
|
||||
* character is inserted as text. For example,
|
||||
*
|
||||
* Ctrl+Shift+u 2 0 A C
|
||||
*
|
||||
* results in the € sign.
|
||||
*
|
||||
* Additional input methods can be made available for use by GTK widgets as
|
||||
* loadable modules. An input method module is a small shared library which
|
||||
* implements a subclass of #GtkIMContext or #GtkIMContextSimple and exports
|
||||
* these four functions:
|
||||
*
|
||||
* |[<!-- language="C" -->
|
||||
* void im_module_init(GTypeModule *module);
|
||||
* ]|
|
||||
* This function should register the #GType of the #GtkIMContext subclass which
|
||||
* implements the input method by means of g_type_module_register_type(). Note
|
||||
* that g_type_register_static() cannot be used as the type needs to be
|
||||
* registered dynamically.
|
||||
*
|
||||
* |[<!-- language="C" -->
|
||||
* void im_module_exit(void);
|
||||
* ]|
|
||||
* Here goes any cleanup code your input method might require on module unload.
|
||||
*
|
||||
* |[<!-- language="C" -->
|
||||
* void im_module_list(const GtkIMContextInfo ***contexts, int *n_contexts)
|
||||
* {
|
||||
* *contexts = info_list;
|
||||
* *n_contexts = G_N_ELEMENTS (info_list);
|
||||
* }
|
||||
* ]|
|
||||
* This function returns the list of input methods provided by the module. The
|
||||
* example implementation above shows a common solution and simply returns a
|
||||
* pointer to statically defined array of #GtkIMContextInfo items for each
|
||||
* provided input method.
|
||||
*
|
||||
* |[<!-- language="C" -->
|
||||
* GtkIMContext * im_module_create(const char *context_id);
|
||||
* ]|
|
||||
* This function should return a pointer to a newly created instance of the
|
||||
* #GtkIMContext subclass identified by @context_id. The context ID is the same
|
||||
* as specified in the #GtkIMContextInfo array returned by im_module_list().
|
||||
*
|
||||
* After a new loadable input method module has been installed on the system,
|
||||
* the configuration file `gtk.immodules` needs to be
|
||||
* regenerated by [gtk-query-immodules-3.0][gtk-query-immodules-3.0],
|
||||
* in order for the new input method to become available to GTK applications.
|
||||
* provides a `GIOExtension` for the extension point named "gtk-im-module".
|
||||
*/
|
||||
|
||||
enum {
|
||||
@ -467,15 +435,16 @@ gtk_im_context_real_get_surrounding_with_selection (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_set_client_widget:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @widget: (allow-none): the client widget. This may be %NULL to indicate
|
||||
* that the previous client widget no longer exists.
|
||||
*
|
||||
* Set the client window for the input context; this is the
|
||||
* #GtkWidget holding the input focus. This widget is
|
||||
* Set the client widget for the input context.
|
||||
*
|
||||
* This is the `GtkWidget` holding the input focus. This widget is
|
||||
* used in order to correctly position status windows, and may
|
||||
* also be used for purposes internal to the input method.
|
||||
**/
|
||||
*/
|
||||
void
|
||||
gtk_im_context_set_client_widget (GtkIMContext *context,
|
||||
GtkWidget *widget)
|
||||
@ -491,20 +460,20 @@ gtk_im_context_set_client_widget (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_get_preedit_string:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @str: (out) (transfer full): location to store the retrieved
|
||||
* string. The string retrieved must be freed with g_free().
|
||||
* @attrs: (out) (transfer full): location to store the retrieved
|
||||
* attribute list. When you are done with this list, you
|
||||
* must unreference it with pango_attr_list_unref().
|
||||
* @cursor_pos: (out): location to store position of cursor (in characters)
|
||||
* within the preedit string.
|
||||
*
|
||||
* within the preedit string.
|
||||
*
|
||||
* Retrieve the current preedit string for the input context,
|
||||
* and a list of attributes to apply to the string.
|
||||
* This string should be displayed inserted at the insertion
|
||||
* point.
|
||||
**/
|
||||
*
|
||||
* This string should be displayed inserted at the insertion point.
|
||||
*/
|
||||
void
|
||||
gtk_im_context_get_preedit_string (GtkIMContext *context,
|
||||
char **str,
|
||||
@ -522,16 +491,17 @@ gtk_im_context_get_preedit_string (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_filter_keypress:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @event: the key event
|
||||
*
|
||||
* Allow an input method to internally handle key press and release
|
||||
* events. If this function returns %TRUE, then no further processing
|
||||
* should be done for this key event.
|
||||
*
|
||||
* Returns: %TRUE if the input method handled the key event.
|
||||
*
|
||||
**/
|
||||
* Allow an input method to internally handle key press and release
|
||||
* events.
|
||||
*
|
||||
* If this function returns %TRUE, then no further processing
|
||||
* should be done for this key event.
|
||||
*
|
||||
* Returns: %TRUE if the input method handled the key event.
|
||||
*/
|
||||
gboolean
|
||||
gtk_im_context_filter_keypress (GtkIMContext *context,
|
||||
GdkEvent *key)
|
||||
@ -547,7 +517,7 @@ gtk_im_context_filter_keypress (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_filter_key:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @press: whether to forward a key press or release event
|
||||
* @surface: the surface the event is for
|
||||
* @device: the device that the event is for
|
||||
@ -557,7 +527,7 @@ gtk_im_context_filter_keypress (GtkIMContext *context,
|
||||
* @group: the active keyboard group for the event
|
||||
*
|
||||
* Allow an input method to forward key press and release events
|
||||
* to another input method, without necessarily having a GdkEvent
|
||||
* to another input methodm without necessarily having a `GdkEvent`
|
||||
* available.
|
||||
*
|
||||
* Returns: %TRUE if the input method handled the key event.
|
||||
@ -631,13 +601,14 @@ gtk_im_context_filter_key (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_focus_in:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
*
|
||||
* Notify the input method that the widget to which this
|
||||
* input context corresponds has gained focus. The input method
|
||||
* may, for example, change the displayed feedback to reflect
|
||||
* this change.
|
||||
**/
|
||||
* input context corresponds has gained focus.
|
||||
*
|
||||
* The input method may, for example, change the displayed
|
||||
* feedback to reflect this change.
|
||||
*/
|
||||
void
|
||||
gtk_im_context_focus_in (GtkIMContext *context)
|
||||
{
|
||||
@ -652,13 +623,14 @@ gtk_im_context_focus_in (GtkIMContext *context)
|
||||
|
||||
/**
|
||||
* gtk_im_context_focus_out:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
*
|
||||
* Notify the input method that the widget to which this
|
||||
* input context corresponds has lost focus. The input method
|
||||
* may, for example, change the displayed feedback or reset the contexts
|
||||
* state to reflect this change.
|
||||
**/
|
||||
* input context corresponds has lost focus.
|
||||
*
|
||||
* The input method may, for example, change the displayed
|
||||
* feedback or reset the contexts state to reflect this change.
|
||||
*/
|
||||
void
|
||||
gtk_im_context_focus_out (GtkIMContext *context)
|
||||
{
|
||||
@ -673,12 +645,13 @@ gtk_im_context_focus_out (GtkIMContext *context)
|
||||
|
||||
/**
|
||||
* gtk_im_context_reset:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
*
|
||||
* Notify the input method that a change such as a change in cursor
|
||||
* position has been made. This will typically cause the input
|
||||
* method to clear the preedit state.
|
||||
**/
|
||||
* position has been made.
|
||||
*
|
||||
* This will typically cause the input method to clear the preedit state.
|
||||
*/
|
||||
void
|
||||
gtk_im_context_reset (GtkIMContext *context)
|
||||
{
|
||||
@ -694,13 +667,14 @@ gtk_im_context_reset (GtkIMContext *context)
|
||||
|
||||
/**
|
||||
* gtk_im_context_set_cursor_location:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @area: new location
|
||||
*
|
||||
* Notify the input method that a change in cursor
|
||||
* position has been made. The location is relative to the client
|
||||
* window.
|
||||
**/
|
||||
* Notify the input method that a change in cursor
|
||||
* position has been made.
|
||||
*
|
||||
* The location is relative to the client window.
|
||||
*/
|
||||
void
|
||||
gtk_im_context_set_cursor_location (GtkIMContext *context,
|
||||
const GdkRectangle *area)
|
||||
@ -716,14 +690,16 @@ gtk_im_context_set_cursor_location (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_set_use_preedit:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @use_preedit: whether the IM context should use the preedit string.
|
||||
*
|
||||
*
|
||||
* Sets whether the IM context should use the preedit string
|
||||
* to display feedback. If @use_preedit is FALSE (default
|
||||
* is TRUE), then the IM context may use some other method to display
|
||||
* feedback, such as displaying it in a child of the root window.
|
||||
**/
|
||||
* to display feedback.
|
||||
*
|
||||
* If @use_preedit is %FALSE (default is %TRUE), then the IM context
|
||||
* may use some other method to display feedback, such as displaying
|
||||
* it in a child of the root window.
|
||||
*/
|
||||
void
|
||||
gtk_im_context_set_use_preedit (GtkIMContext *context,
|
||||
gboolean use_preedit)
|
||||
@ -739,7 +715,7 @@ gtk_im_context_set_use_preedit (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_set_surrounding:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @text: text surrounding the insertion point, as UTF-8.
|
||||
* the preedit string should not be included within
|
||||
* @text.
|
||||
@ -747,11 +723,13 @@ gtk_im_context_set_use_preedit (GtkIMContext *context,
|
||||
* @cursor_index: the byte index of the insertion cursor within @text.
|
||||
*
|
||||
* Sets surrounding context around the insertion point and preedit
|
||||
* string. This function is expected to be called in response to the
|
||||
* GtkIMContext::retrieve_surrounding signal, and will likely have no
|
||||
* effect if called at other times.
|
||||
* string.
|
||||
*
|
||||
* Deprecated: 4.2: Use gtk_im_context_set_surrounding_with_selection() instead
|
||||
* This function is expected to be called in response to the
|
||||
* [signal@Gtk.IMContext::retrieve-surrounding] signal, and will
|
||||
* likely have no effect if called at other times.
|
||||
*
|
||||
* Deprecated: 4.2: Use [method@Gtk.IMContext.set_surrounding_with_selection] instead
|
||||
*/
|
||||
void
|
||||
gtk_im_context_set_surrounding (GtkIMContext *context,
|
||||
@ -805,31 +783,34 @@ gtk_im_context_set_surrounding_with_selection (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_get_surrounding:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @text: (out) (transfer full): location to store a UTF-8 encoded
|
||||
* string of text holding context around the insertion point.
|
||||
* If the function returns %TRUE, then you must free the result
|
||||
* stored in this location with g_free().
|
||||
* string of text holding context around the insertion point.
|
||||
* If the function returns %TRUE, then you must free the result
|
||||
* stored in this location with g_free().
|
||||
* @cursor_index: (out): location to store byte index of the insertion
|
||||
* cursor within @text.
|
||||
* cursor within @text.
|
||||
*
|
||||
* Retrieves context around the insertion point. Input methods
|
||||
* typically want context in order to constrain input text based on
|
||||
* existing text; this is important for languages such as Thai where
|
||||
* only some sequences of characters are allowed.
|
||||
* Retrieves context around the insertion point.
|
||||
*
|
||||
* Input methods typically want context in order to constrain input text
|
||||
* based on existing text; this is important for languages such as Thai
|
||||
* where only some sequences of characters are allowed.
|
||||
*
|
||||
* This function is implemented by emitting the
|
||||
* GtkIMContext::retrieve_surrounding signal on the input method; in
|
||||
* response to this signal, a widget should provide as much context as
|
||||
* [signal@Gtk.IMContext::retrieve-surrounding] signal on the input method;
|
||||
* in response to this signal, a widget should provide as much context as
|
||||
* is available, up to an entire paragraph, by calling
|
||||
* gtk_im_context_set_surrounding(). Note that there is no obligation
|
||||
* for a widget to respond to the ::retrieve_surrounding signal, so input
|
||||
* methods must be prepared to function without context.
|
||||
* [method@Gtk.IMContext.set_surrounding].
|
||||
*
|
||||
* Returns: %TRUE if surrounding text was provided; in this case
|
||||
* you must free the result stored in *text.
|
||||
* Note that there is no obligation for a widget to respond to the
|
||||
* `::retrieve-surrounding` signal, so input methods must be prepared to
|
||||
* function without context.
|
||||
*
|
||||
* Deprecated: 4.2: Use gtk_im_context_get_surrounding_with_selection() instead.
|
||||
* Returns: `TRUE` if surrounding text was provided; in this case
|
||||
* you must free the result stored in `text`.
|
||||
*
|
||||
* Deprecated: 4.2: Use [method@Gtk.IMContext.get_surrounding_with_selection] instead.
|
||||
*/
|
||||
gboolean
|
||||
gtk_im_context_get_surrounding (GtkIMContext *context,
|
||||
@ -846,29 +827,32 @@ gtk_im_context_get_surrounding (GtkIMContext *context,
|
||||
* gtk_im_context_get_surrounding_with_selection:
|
||||
* @context: a #GtkIMContext
|
||||
* @text: (out) (transfer full): location to store a UTF-8 encoded
|
||||
* string of text holding context around the insertion point.
|
||||
* If the function returns %TRUE, then you must free the result
|
||||
* stored in this location with g_free().
|
||||
* string of text holding context around the insertion point.
|
||||
* If the function returns %TRUE, then you must free the result
|
||||
* stored in this location with g_free().
|
||||
* @cursor_index: (out): location to store byte index of the insertion
|
||||
* cursor within @text.
|
||||
* cursor within @text.
|
||||
* @anchor_index: (out): location to store byte index of the selection
|
||||
* bound within @text
|
||||
* bound within @text
|
||||
*
|
||||
* Retrieves context around the insertion point. Input methods
|
||||
* typically want context in order to constrain input text based on
|
||||
* existing text; this is important for languages such as Thai where
|
||||
* only some sequences of characters are allowed.
|
||||
* Retrieves context around the insertion point.
|
||||
*
|
||||
* Input methods typically want context in order to constrain input
|
||||
* text based on existing text; this is important for languages such
|
||||
* as Thai where only some sequences of characters are allowed.
|
||||
*
|
||||
* This function is implemented by emitting the
|
||||
* GtkIMContext::retrieve_surrounding signal on the input method; in
|
||||
* response to this signal, a widget should provide as much context as
|
||||
* [signal@Gtk.IMContext::retrieve-surrounding] signal on the input method;
|
||||
* in response to this signal, a widget should provide as much context as
|
||||
* is available, up to an entire paragraph, by calling
|
||||
* gtk_im_context_set_surrounding(). Note that there is no obligation
|
||||
* for a widget to respond to the ::retrieve_surrounding signal, so input
|
||||
* methods must be prepared to function without context.
|
||||
* [method@Gtk.IMContext.set_surrounding_with_selection].
|
||||
*
|
||||
* Returns: %TRUE if surrounding text was provided; in this case
|
||||
* you must free the result stored in *text.
|
||||
* Note that there is no obligation for a widget to respond to the
|
||||
* `::retrieve-surrounding` signal, so input methods must be prepared to
|
||||
* function without context.
|
||||
*
|
||||
* Returns: `TRUE` if surrounding text was provided; in this case
|
||||
* you must free the result stored in `text`.
|
||||
*/
|
||||
gboolean
|
||||
gtk_im_context_get_surrounding_with_selection (GtkIMContext *context,
|
||||
@ -909,16 +893,17 @@ gtk_im_context_get_surrounding_with_selection (GtkIMContext *context,
|
||||
|
||||
/**
|
||||
* gtk_im_context_delete_surrounding:
|
||||
* @context: a #GtkIMContext
|
||||
* @context: a `GtkIMContext`
|
||||
* @offset: offset from cursor position in chars;
|
||||
* a negative value means start before the cursor.
|
||||
* @n_chars: number of characters to delete.
|
||||
*
|
||||
*
|
||||
* Asks the widget that the input context is attached to delete
|
||||
* characters around the cursor position by emitting the
|
||||
* GtkIMContext::delete_surrounding signal. Note that @offset and @n_chars
|
||||
* are in characters not in bytes which differs from the usage other
|
||||
* places in #GtkIMContext.
|
||||
* GtkIMContext::delete_surrounding signal.
|
||||
*
|
||||
* Note that @offset and @n_chars are in characters not in bytes
|
||||
* which differs from the usage other places in #GtkIMContext.
|
||||
*
|
||||
* In order to use this function, you should first call
|
||||
* gtk_im_context_get_surrounding() to get the current context, and
|
||||
|
||||
Loading…
Reference in New Issue
Block a user