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Public Member Functions | List of all members
flutter::TextInputManager Class Reference

`#include <text_input_manager.h>`

## Public Member Functions
| TextInputManager () noexcept=default
virtual | ~TextInputManager ()=default
void | SetWindowHandle (HWND window_handle)
void | CreateImeWindow ()
void | DestroyImeWindow ()
void | UpdateImeWindow ()
void | UpdateCaretRect (const Rect &rect)
virtual long | GetComposingCursorPosition () const
virtual std::optional< std::u16string > | GetComposingString () const
virtual std::optional< std::u16string > | GetResultString () const
void | AbortComposing ()

## Detailed Description

Definition at line 29 of file text_input_manager.h.

## Constructor & Destructor Documentation

## ◆ TextInputManager()

flutter::TextInputManager::TextInputManager | ( |  | ) |
| defaultnoexcept

## ◆ ~TextInputManager()

virtual flutter::TextInputManager::~TextInputManager | ( |  | ) |
| virtualdefault

## Member Function Documentation

## ◆ AbortComposing()

void flutter::TextInputManager::AbortComposing | ( |  | ) |

Aborts IME composing.

Aborts composing, closes the candidates window, and clears the contents of the composing string.

Definition at line 126 of file text_input_manager.cc.

126 {
127 if (window_handle_ == nullptr || !ime_active_) {
128 return;
129 }
130
131 ImmContext imm_context(window_handle_);
132 if (imm_context.IsValid()) {
133 // Cancel composing and close the candidates window.
134 ::ImmNotifyIME(imm_context.get(), NI_COMPOSITIONSTR, CPS_CANCEL, 0);
135 ::ImmNotifyIME(imm_context.get(), NI_CLOSECANDIDATE, 0, 0);
136
137 // Clear the composing string.
138 wchar_t composition_str[] = L"";
139 wchar_t reading_str[] = L"";
140 ::ImmSetCompositionStringW(imm_context.get(), SCS_SETSTR, composition_str,
141 sizeof(wchar_t), reading_str, sizeof(wchar_t));
142 }
143 }

References flutter::ImmContext::get(), and flutter::ImmContext::IsValid().

## ◆ CreateImeWindow()

void flutter::TextInputManager::CreateImeWindow | ( |  | ) |

Definition at line 51 of file text_input_manager.cc.

51 {
52 if (window_handle_ == nullptr) {
53 return;
54 }
55
56 // Some IMEs ignore calls to ::ImmSetCandidateWindow() and use the position of
57 // the current system caret instead via ::GetCaretPos(). In order to behave
58 // as expected with these IMEs, we create a temporary system caret.
59 if (!ime_active_) {
60 ::CreateCaret(window_handle_, nullptr, 1, 1);
61 }
62 ime_active_ = true;
63
64 // Set the position of the IME windows.
65 UpdateImeWindow();
66 }

References UpdateImeWindow().

## ◆ DestroyImeWindow()

void flutter::TextInputManager::DestroyImeWindow | ( |  | ) |

Definition at line 68 of file text_input_manager.cc.

68 {
69 if (window_handle_ == nullptr) {
70 return;
71 }
72
73 // Destroy the system caret created in CreateImeWindow().
74 if (ime_active_) {
75 ::DestroyCaret();
76 }
77 ime_active_ = false;
78 }

## ◆ GetComposingCursorPosition()

long flutter::TextInputManager::GetComposingCursorPosition | ( |  | ) | const
| virtual

Definition at line 104 of file text_input_manager.cc.

104 {
105 if (window_handle_ == nullptr) {
106 return false;
107 }
108
109 ImmContext imm_context(window_handle_);
110 if (imm_context.IsValid()) {
111 // Read the cursor position within the composing string.
112 return ImmGetCompositionString(imm_context.get(), GCS_CURSORPOS, nullptr,
113 0);
114 }
115 return -1;
116 }

References flutter::ImmContext::get(), and flutter::ImmContext::IsValid().

## ◆ GetComposingString()

std::optional< std::u16string > flutter::TextInputManager::GetComposingString | ( |  | ) | const
| virtual

Definition at line 118 of file text_input_manager.cc.

118 {
119 return GetString(GCS_COMPSTR);
120 }

## ◆ GetResultString()

std::optional< std::u16string > flutter::TextInputManager::GetResultString | ( |  | ) | const
| virtual

Definition at line 122 of file text_input_manager.cc.

122 {
123 return GetString(GCS_RESULTSTR);
124 }

## ◆ SetWindowHandle()

void flutter::TextInputManager::SetWindowHandle | ( | HWND | window_handle | ) |

Definition at line 47 of file text_input_manager.cc.

47 {
48 window_handle_ = window_handle;
49 }

## ◆ UpdateCaretRect()

void flutter::TextInputManager::UpdateCaretRect | ( | const Rect & | rect | ) |

Definition at line 91 of file text_input_manager.cc.

91 {
92 caret_rect_ = rect;
93
94 if (window_handle_ == nullptr) {
95 return;
96 }
97
98 ImmContext imm_context(window_handle_);
99 if (imm_context.IsValid()) {
100 MoveImeWindow(imm_context.get());
101 }
102 }

References flutter::ImmContext::get(), and flutter::ImmContext::IsValid().

## ◆ UpdateImeWindow()

void flutter::TextInputManager::UpdateImeWindow | ( |  | ) |

Definition at line 80 of file text_input_manager.cc.

80 {
81 if (window_handle_ == nullptr) {
82 return;
83 }
84
85 ImmContext imm_context(window_handle_);
86 if (imm_context.IsValid()) {
87 MoveImeWindow(imm_context.get());
88 }
89 }

References flutter::ImmContext::get(), and flutter::ImmContext::IsValid().

Referenced by CreateImeWindow().

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

- shell/platform/windows/text_input_manager.h
- shell/platform/windows/text_input_manager.cc

flutter::TextInputManager::UpdateImeWindow
void UpdateImeWindow()
Definition: text_input_manager.cc:80