/* Copyright 2012 The Chromium Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/**
* This file defines the <code>PPB_IMEInputEvent_Dev</code> interface.
*/
label Chrome {
M16 = 0.1,
M21 = 0.2
};
[macro="PPB_IME_INPUT_EVENT_DEV_INTERFACE"]
interface PPB_IMEInputEvent_Dev {
/**
* Create() creates an IME input event with the given parameters. Normally
* you will get an IME event passed through the <code>HandleInputEvent</code>
* and will not need to create them, but some applications may want to create
* their own for internal use.
*
* @param[in] instance The instance for which this event occurred.
*
* @param[in] type A <code>PP_InputEvent_Type</code> identifying the type of
* input event. The type must be one of the IME event types.
*
* @param[in] time_stamp A <code>PP_TimeTicks</code> indicating the time
* when the event occurred.
*
* @param[in] text The string returned by <code>GetText</code>.
*
* @param[in] segment_number The number returned by
* <code>GetSegmentNumber</code>.
*
* @param[in] segment_offsets The array of numbers returned by
* <code>GetSegmentOffset</code>. If <code>segment_number</code> is zero,
* the number of elements of the array should be zero. If
* <code>segment_number</code> is non-zero, the length of the array must be
* <code>segment_number</code> + 1.
*
* @param[in] target_segment The number returned by
* <code>GetTargetSegment</code>.
*
* @param[in] selection_start The start index returned by
* <code>GetSelection</code>.
*
* @param[in] selection_end The end index returned by
* <code>GetSelection</code>.
*
* @return A <code>PP_Resource</code> containing the new IME input event.
*/
[version=0.2]
PP_Resource Create([in] PP_Instance instance,
[in] PP_InputEvent_Type type,
[in] PP_TimeTicks time_stamp,
[in] PP_Var text,
[in] uint32_t segment_number,
[in] uint32_t[] segment_offsets,
[in] int32_t target_segment,
[in] uint32_t selection_start,
[in] uint32_t selection_end);
/**
* IsIMEInputEvent() determines if a resource is an IME event.
*
* @param[in] resource A <code>PP_Resource</code> corresponding to an event.
*
* @return <code>PP_TRUE</code> if the given resource is a valid input event.
*/
PP_Bool IsIMEInputEvent([in] PP_Resource resource);
/**
* GetText() returns the composition text as a UTF-8 string for the given IME
* event.
*
* @param[in] ime_event A <code>PP_Resource</code> corresponding to an IME
* event.
*
* @return A string var representing the composition text. For non-IME input
* events the return value will be an undefined var.
*/
PP_Var GetText([in] PP_Resource ime_event);
/**
* GetSegmentNumber() returns the number of segments in the composition text.
*
* @param[in] ime_event A <code>PP_Resource</code> corresponding to an IME
* event.
*
* @return The number of segments. For events other than COMPOSITION_UPDATE,
* returns 0.
*/
uint32_t GetSegmentNumber([in] PP_Resource ime_event);
/**
* GetSegmentOffset() returns the position of the index-th segmentation point
* in the composition text. The position is given by a byte-offset (not a
* character-offset) of the string returned by GetText(). It always satisfies
* 0=GetSegmentOffset(0) < ... < GetSegmentOffset(i) < GetSegmentOffset(i+1)
* < ... < GetSegmentOffset(GetSegmentNumber())=(byte-length of GetText()).
* Note that [GetSegmentOffset(i), GetSegmentOffset(i+1)) represents the range
* of the i-th segment, and hence GetSegmentNumber() can be a valid argument
* to this function instead of an off-by-1 error.
*
* @param[in] ime_event A <code>PP_Resource</code> corresponding to an IME
* event.
*
* @param[in] index An integer indicating a segment.
*
* @return The byte-offset of the segmentation point. If the event is not
* COMPOSITION_UPDATE or index is out of range, returns 0.
*/
uint32_t GetSegmentOffset([in] PP_Resource ime_event,
[in] uint32_t index);
/**
* GetTargetSegment() returns the index of the current target segment of
* composition.
*
* @param[in] ime_event A <code>PP_Resource</code> corresponding to an IME
* event.
*
* @return An integer indicating the index of the target segment. When there
* is no active target segment, or the event is not COMPOSITION_UPDATE,
* returns -1.
*/
int32_t GetTargetSegment([in] PP_Resource ime_event);
/**
* GetSelection() returns the range selected by caret in the composition text.
*
* @param[in] ime_event A <code>PP_Resource</code> corresponding to an IME
* event.
*
* @param[out] start The start position of the current selection.
*
* @param[out] end The end position of the current selection.
*/
void GetSelection([in] PP_Resource ime_event,
[out] uint32_t start,
[out] uint32_t end);
};
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