// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "app/l10n_util.h"
#include "app/l10n_util_win.h"
#include "app/win_util.h"
#include "base/clipboard.h"
#include "base/gfx/native_theme.h"
#include "base/scoped_clipboard_writer.h"
#include "base/string_util.h"
#include "base/win_util.h"
#include "grit/app_strings.h"
#include "skia/ext/skia_utils_win.h"
#include "views/controls/menu/menu_win.h"
#include "views/controls/native/native_view_host.h"
#include "views/controls/textfield/native_textfield_win.h"
#include "views/controls/textfield/textfield.h"
#include "views/focus/focus_manager.h"
#include "views/focus/focus_util_win.h"
#include "views/views_delegate.h"
#include "views/widget/widget.h"
namespace views {
///////////////////////////////////////////////////////////////////////////////
// Helper classes
NativeTextfieldWin::ScopedFreeze::ScopedFreeze(NativeTextfieldWin* edit,
ITextDocument* text_object_model)
: edit_(edit),
text_object_model_(text_object_model) {
// Freeze the screen.
if (text_object_model_) {
long count;
text_object_model_->Freeze(&count);
}
}
NativeTextfieldWin::ScopedFreeze::~ScopedFreeze() {
// Unfreeze the screen.
if (text_object_model_) {
long count;
text_object_model_->Unfreeze(&count);
if (count == 0) {
// We need to UpdateWindow() here instead of InvalidateRect() because, as
// far as I can tell, the edit likes to synchronously erase its background
// when unfreezing, thus requiring us to synchronously redraw if we don't
// want flicker.
edit_->UpdateWindow();
}
}
}
///////////////////////////////////////////////////////////////////////////////
// NativeTextfieldWin
bool NativeTextfieldWin::did_load_library_ = false;
NativeTextfieldWin::NativeTextfieldWin(Textfield* textfield)
: textfield_(textfield),
tracking_double_click_(false),
double_click_time_(0),
can_discard_mousemove_(false),
contains_mouse_(false),
ime_discard_composition_(false),
ime_composition_start_(0),
ime_composition_length_(0),
bg_color_(0) {
if (!did_load_library_)
did_load_library_ = !!LoadLibrary(L"riched20.dll");
DWORD style = kDefaultEditStyle;
if (textfield_->style() & Textfield::STYLE_PASSWORD)
style |= ES_PASSWORD;
if (textfield_->read_only())
style |= ES_READONLY;
if (textfield_->style() & Textfield::STYLE_MULTILINE)
style |= ES_MULTILINE | ES_WANTRETURN | ES_AUTOVSCROLL;
else
style |= ES_AUTOHSCROLL;
// Make sure we apply RTL related extended window styles if necessary.
DWORD ex_style = l10n_util::GetExtendedStyles();
RECT r = {0, 0, textfield_->width(), textfield_->height()};
Create(textfield_->GetWidget()->GetNativeView(), r, NULL, style, ex_style);
if (textfield_->style() & Textfield::STYLE_LOWERCASE) {
DCHECK((textfield_->style() & Textfield::STYLE_PASSWORD) == 0);
SetEditStyle(SES_LOWERCASE, SES_LOWERCASE);
}
// Set up the text_object_model_.
CComPtr<IRichEditOle> ole_interface;
ole_interface.Attach(GetOleInterface());
text_object_model_ = ole_interface;
container_view_ = new NativeViewHost;
textfield_->AddChildView(container_view_);
container_view_->set_focus_view(textfield_);
container_view_->Attach(m_hWnd);
}
NativeTextfieldWin::~NativeTextfieldWin() {
if (IsWindow())
DestroyWindow();
}
////////////////////////////////////////////////////////////////////////////////
// NativeTextfieldWin, NativeTextfieldWrapper implementation:
std::wstring NativeTextfieldWin::GetText() const {
int len = GetTextLength() + 1;
std::wstring str;
GetWindowText(WriteInto(&str, len), len);
return str;
}
void NativeTextfieldWin::UpdateText() {
std::wstring text = textfield_->text();
// Adjusting the string direction before setting the text in order to make
// sure both RTL and LTR strings are displayed properly.
std::wstring text_to_set;
if (!l10n_util::AdjustStringForLocaleDirection(text, &text_to_set))
text_to_set = text;
if (textfield_->style() & Textfield::STYLE_LOWERCASE)
text_to_set = l10n_util::ToLower(text_to_set);
SetWindowText(text_to_set.c_str());
}
void NativeTextfieldWin::AppendText(const std::wstring& text) {
int text_length = GetWindowTextLength();
::SendMessage(m_hWnd, TBM_SETSEL, true, MAKELPARAM(text_length, text_length));
::SendMessage(m_hWnd, EM_REPLACESEL, false,
reinterpret_cast<LPARAM>(text.c_str()));
}
std::wstring NativeTextfieldWin::GetSelectedText() const {
// Figure out the length of the selection.
long start;
long end;
GetSel(start, end);
// Grab the selected text.
std::wstring str;
GetSelText(WriteInto(&str, end - start + 1));
return str;
}
void NativeTextfieldWin::SelectAll() {
// Select from the end to the front so that the first part of the text is
// always visible.
SetSel(GetTextLength(), 0);
}
void NativeTextfieldWin::ClearSelection() {
SetSel(GetTextLength(), GetTextLength());
}
void NativeTextfieldWin::UpdateBorder() {
SetWindowPos(NULL, 0, 0, 0, 0,
SWP_NOMOVE | SWP_FRAMECHANGED | SWP_NOACTIVATE |
SWP_NOOWNERZORDER | SWP_NOSIZE);
}
void NativeTextfieldWin::UpdateBackgroundColor() {
if (!textfield_->use_default_background_color()) {
bg_color_ = skia::SkColorToCOLORREF(textfield_->background_color());
} else {
bg_color_ = GetSysColor(textfield_->read_only() ? COLOR_3DFACE
: COLOR_WINDOW);
}
CRichEditCtrl::SetBackgroundColor(bg_color_);
}
void NativeTextfieldWin::UpdateReadOnly() {
SendMessage(m_hWnd, EM_SETREADONLY, textfield_->read_only(), 0);
}
void NativeTextfieldWin::UpdateFont() {
SendMessage(m_hWnd, WM_SETFONT,
reinterpret_cast<WPARAM>(textfield_->font().hfont()), TRUE);
}
void NativeTextfieldWin::UpdateEnabled() {
SendMessage(m_hWnd, WM_ENABLE, textfield_->IsEnabled(), 0);
}
void NativeTextfieldWin::SetHorizontalMargins(int left, int right) {
// SendMessage expects the two values to be packed into one using MAKELONG
// so we truncate to 16 bits if necessary.
SendMessage(m_hWnd, EM_SETMARGINS,
EC_LEFTMARGIN | EC_RIGHTMARGIN,
MAKELONG(left & 0xFFFF, right & 0xFFFF));
}
void NativeTextfieldWin::SetFocus() {
// Focus the associated HWND.
//container_view_->Focus();
::SetFocus(m_hWnd);
}
View* NativeTextfieldWin::GetView() {
return container_view_;
}
gfx::NativeView NativeTextfieldWin::GetTestingHandle() const {
return m_hWnd;
}
////////////////////////////////////////////////////////////////////////////////
// NativeTextfieldWin, SimpleMenuModel::Delegate implementation:
bool NativeTextfieldWin::IsCommandIdChecked(int command_id) const {
return false;
}
bool NativeTextfieldWin::IsCommandIdEnabled(int command_id) const {
switch (command_id) {
case IDS_APP_UNDO: return !textfield_->read_only() && !!CanUndo();
case IDS_APP_CUT: return !textfield_->read_only() &&
!textfield_->IsPassword() && !!CanCut();
case IDS_APP_COPY: return !!CanCopy() && !textfield_->IsPassword();
case IDS_APP_PASTE: return !textfield_->read_only() && !!CanPaste();
case IDS_APP_SELECT_ALL: return !!CanSelectAll();
default: NOTREACHED();
return false;
}
}
bool NativeTextfieldWin::GetAcceleratorForCommandId(int command_id,
Accelerator* accelerator) {
// The standard Ctrl-X, Ctrl-V and Ctrl-C are not defined as accelerators
// anywhere so we need to check for them explicitly here.
switch (command_id) {
case IDS_APP_CUT:
*accelerator = views::Accelerator(L'X', false, true, false);
return true;
case IDS_APP_COPY:
*accelerator = views::Accelerator(L'C', false, true, false);
return true;
case IDS_APP_PASTE:
*accelerator = views::Accelerator(L'V', false, true, false);
return true;
}
return container_view_->GetWidget()->GetAccelerator(command_id, accelerator);
}
void NativeTextfieldWin::ExecuteCommand(int command_id) {
ScopedFreeze freeze(this, GetTextObjectModel());
OnBeforePossibleChange();
switch (command_id) {
case IDS_APP_UNDO: Undo(); break;
case IDS_APP_CUT: Cut(); break;
case IDS_APP_COPY: Copy(); break;
case IDS_APP_PASTE: Paste(); break;
case IDS_APP_SELECT_ALL: SelectAll(); break;
default: NOTREACHED(); break;
}
OnAfterPossibleChange();
}
////////////////////////////////////////////////////////////////////////////////
// NativeTextfieldWin, private:
void NativeTextfieldWin::OnChar(TCHAR ch, UINT repeat_count, UINT flags) {
HandleKeystroke(GetCurrentMessage()->message, ch, repeat_count, flags);
}
void NativeTextfieldWin::OnContextMenu(HWND window, const CPoint& point) {
CPoint p(point);
if (point.x == -1 || point.y == -1) {
GetCaretPos(&p);
MapWindowPoints(HWND_DESKTOP, &p, 1);
}
BuildContextMenu();
context_menu_->RunContextMenuAt(gfx::Point(p));
}
void NativeTextfieldWin::OnCopy() {
if (textfield_->IsPassword())
return;
const std::wstring text(GetSelectedText());
if (!text.empty() && ViewsDelegate::views_delegate) {
ScopedClipboardWriter scw(ViewsDelegate::views_delegate->GetClipboard());
scw.WriteText(text);
}
}
void NativeTextfieldWin::OnCut() {
if (textfield_->read_only() || textfield_->IsPassword())
return;
OnCopy();
// This replace selection will have no effect (even on the undo stack) if the
// current selection is empty.
ReplaceSel(L"", true);
}
LRESULT NativeTextfieldWin::OnImeChar(UINT message, WPARAM wparam, LPARAM lparam) {
// http://crbug.com/7707: a rich-edit control may crash when it receives a
// WM_IME_CHAR message while it is processing a WM_IME_COMPOSITION message.
// Since view controls don't need WM_IME_CHAR messages, we prevent WM_IME_CHAR
// messages from being dispatched to view controls via the CallWindowProc()
// call.
return 0;
}
LRESULT NativeTextfieldWin::OnImeStartComposition(UINT message,
WPARAM wparam,
LPARAM lparam) {
// Users may press alt+shift or control+shift keys to change their keyboard
// layouts. So, we retrieve the input locale identifier everytime we start
// an IME composition.
int language_id = PRIMARYLANGID(GetKeyboardLayout(0));
ime_discard_composition_ =
language_id == LANG_JAPANESE || language_id == LANG_CHINESE;
ime_composition_start_ = 0;
ime_composition_length_ = 0;
return DefWindowProc(message, wparam, lparam);
}
LRESULT NativeTextfieldWin::OnImeComposition(UINT message,
WPARAM wparam,
LPARAM lparam) {
text_before_change_.clear();
LRESULT result = DefWindowProc(message, wparam, lparam);
ime_composition_start_ = 0;
ime_composition_length_ = 0;
if (ime_discard_composition_) {
// Call IMM32 functions to retrieve the position and the length of the
// ongoing composition string and notify the OnAfterPossibleChange()
// function that it should discard the composition string from a search
// string. We should not call IMM32 functions in the function because it
// is called when an IME is not composing a string.
HIMC imm_context = ImmGetContext(m_hWnd);
if (imm_context) {
CHARRANGE selection;
GetSel(selection);
const int cursor_position =
ImmGetCompositionString(imm_context, GCS_CURSORPOS, NULL, 0);
if (cursor_position >= 0)
ime_composition_start_ = selection.cpMin - cursor_position;
const int composition_size =
ImmGetCompositionString(imm_context, GCS_COMPSTR, NULL, 0);
if (composition_size >= 0)
ime_composition_length_ = composition_size / sizeof(wchar_t);
ImmReleaseContext(m_hWnd, imm_context);
}
}
OnAfterPossibleChange();
return result;
}
LRESULT NativeTextfieldWin::OnImeEndComposition(UINT message,
WPARAM wparam,
LPARAM lparam) {
// Bug 11863: Korean IMEs send a WM_IME_ENDCOMPOSITION message without
// sending any WM_IME_COMPOSITION messages when a user deletes all
// composition characters, i.e. a composition string becomes empty. To handle
// this case, we need to update the find results when a composition is
// finished or canceled.
textfield_->SyncText();
if (textfield_->GetController())
textfield_->GetController()->ContentsChanged(textfield_, GetText());
return DefWindowProc(message, wparam, lparam);
}
void NativeTextfieldWin::OnKeyDown(TCHAR key, UINT repeat_count, UINT flags) {
// NOTE: Annoyingly, ctrl-alt-<key> generates WM_KEYDOWN rather than
// WM_SYSKEYDOWN, so we need to check (flags & KF_ALTDOWN) in various places
// in this function even with a WM_SYSKEYDOWN handler.
switch (key) {
case VK_RETURN:
// If we are multi-line, we want to let returns through so they start a
// new line.
if (textfield_->IsMultiLine())
break;
else
return;
// Hijacking Editing Commands
//
// We hijack the keyboard short-cuts for Cut, Copy, and Paste here so that
// they go through our clipboard routines. This allows us to be smarter
// about how we interact with the clipboard and avoid bugs in the
// CRichEditCtrl. If we didn't hijack here, the edit control would handle
// these internally with sending the WM_CUT, WM_COPY, or WM_PASTE messages.
//
// Cut: Shift-Delete and Ctrl-x are treated as cut. Ctrl-Shift-Delete and
// Ctrl-Shift-x are not treated as cut even though the underlying
// CRichTextEdit would treat them as such.
// Copy: Ctrl-c is treated as copy. Shift-Ctrl-c is not.
// Paste: Shift-Insert and Ctrl-v are tread as paste. Ctrl-Shift-Insert and
// Ctrl-Shift-v are not.
//
// This behavior matches most, but not all Windows programs, and largely
// conforms to what users expect.
case VK_DELETE:
case 'X':
if ((flags & KF_ALTDOWN) ||
(GetKeyState((key == 'X') ? VK_CONTROL : VK_SHIFT) >= 0))
break;
if (GetKeyState((key == 'X') ? VK_SHIFT : VK_CONTROL) >= 0) {
ScopedFreeze freeze(this, GetTextObjectModel());
OnBeforePossibleChange();
Cut();
OnAfterPossibleChange();
}
return;
case 'C':
if ((flags & KF_ALTDOWN) || (GetKeyState(VK_CONTROL) >= 0))
break;
if (GetKeyState(VK_SHIFT) >= 0)
Copy();
return;
case VK_INSERT:
// Ignore insert by itself, so we don't turn overtype mode on/off.
if (!(flags & KF_ALTDOWN) && (GetKeyState(VK_SHIFT) >= 0) &&
(GetKeyState(VK_CONTROL) >= 0))
return;
case 'V':
if ((flags & KF_ALTDOWN) ||
(GetKeyState((key == 'V') ? VK_CONTROL : VK_SHIFT) >= 0))
break;
if (GetKeyState((key == 'V') ? VK_SHIFT : VK_CONTROL) >= 0) {
ScopedFreeze freeze(this, GetTextObjectModel());
OnBeforePossibleChange();
Paste();
OnAfterPossibleChange();
}
return;
case 0xbb: // Ctrl-'='. Triggers subscripting, even in plain text mode.
// We don't use VK_OEM_PLUS in case the macro isn't defined.
// (e.g., we don't have this symbol in embeded environment).
return;
case VK_PROCESSKEY:
// This key event is consumed by an IME.
// We ignore this event because an IME sends WM_IME_COMPOSITION messages
// when it updates the CRichEditCtrl text.
return;
}
// CRichEditCtrl changes its text on WM_KEYDOWN instead of WM_CHAR for many
// different keys (backspace, ctrl-v, ...), so we call this in both cases.
HandleKeystroke(GetCurrentMessage()->message, key, repeat_count, flags);
}
void NativeTextfieldWin::OnLButtonDblClk(UINT keys, const CPoint& point) {
// Save the double click info for later triple-click detection.
tracking_double_click_ = true;
double_click_point_ = point;
double_click_time_ = GetCurrentMessage()->time;
ScopedFreeze freeze(this, GetTextObjectModel());
OnBeforePossibleChange();
DefWindowProc(WM_LBUTTONDBLCLK, keys,
MAKELPARAM(ClipXCoordToVisibleText(point.x, false), point.y));
OnAfterPossibleChange();
}
void NativeTextfieldWin::OnLButtonDown(UINT keys, const CPoint& point) {
// Check for triple click, then reset tracker. Should be safe to subtract
// double_click_time_ from the current message's time even if the timer has
// wrapped in between.
const bool is_triple_click = tracking_double_click_ &&
win_util::IsDoubleClick(double_click_point_, point,
GetCurrentMessage()->time - double_click_time_);
tracking_double_click_ = false;
ScopedFreeze freeze(this, GetTextObjectModel());
OnBeforePossibleChange();
DefWindowProc(WM_LBUTTONDOWN, keys,
MAKELPARAM(ClipXCoordToVisibleText(point.x, is_triple_click),
point.y));
OnAfterPossibleChange();
}
void NativeTextfieldWin::OnLButtonUp(UINT keys, const CPoint& point) {
ScopedFreeze freeze(this, GetTextObjectModel());
OnBeforePossibleChange();
DefWindowProc(WM_LBUTTONUP, keys,
MAKELPARAM(ClipXCoordToVisibleText(point.x, false), point.y));
OnAfterPossibleChange();
}
void NativeTextfieldWin::OnMouseLeave() {
SetContainsMouse(false);
}
LRESULT NativeTextfieldWin::OnMouseWheel(UINT message, WPARAM w_param,
LPARAM l_param) {
// Reroute the mouse-wheel to the window under the mouse pointer if
// applicable.
if (views::RerouteMouseWheel(m_hWnd, w_param, l_param))
return 0;
return DefWindowProc(message, w_param, l_param);;
}
void NativeTextfieldWin::OnMouseMove(UINT keys, const CPoint& point) {
SetContainsMouse(true);
// Clamp the selection to the visible text so the user can't drag to select
// the "phantom newline". In theory we could achieve this by clipping the X
// coordinate, but in practice the edit seems to behave nondeterministically
// with similar sequences of clipped input coordinates fed to it. Maybe it's
// reading the mouse cursor position directly?
//
// This solution has a minor visual flaw, however: if there's a visible
// cursor at the edge of the text (only true when there's no selection),
// dragging the mouse around outside that edge repaints the cursor on every
// WM_MOUSEMOVE instead of allowing it to blink normally. To fix this, we
// special-case this exact case and discard the WM_MOUSEMOVE messages instead
// of passing them along.
//
// But even this solution has a flaw! (Argh.) In the case where the user
// has a selection that starts at the edge of the edit, and proceeds to the
// middle of the edit, and the user is dragging back past the start edge to
// remove the selection, there's a redraw problem where the change between
// having the last few bits of text still selected and having nothing
// selected can be slow to repaint (which feels noticeably strange). This
// occurs if you only let the edit receive a single WM_MOUSEMOVE past the
// edge of the text. I think on each WM_MOUSEMOVE the edit is repainting its
// previous state, then updating its internal variables to the new state but
// not repainting. To fix this, we allow one more WM_MOUSEMOVE through after
// the selection has supposedly been shrunk to nothing; this makes the edit
// redraw the selection quickly so it feels smooth.
CHARRANGE selection;
GetSel(selection);
const bool possibly_can_discard_mousemove =
(selection.cpMin == selection.cpMax) &&
(((selection.cpMin == 0) &&
(ClipXCoordToVisibleText(point.x, false) > point.x)) ||
((selection.cpMin == GetTextLength()) &&
(ClipXCoordToVisibleText(point.x, false) < point.x)));
if (!can_discard_mousemove_ || !possibly_can_discard_mousemove) {
can_discard_mousemove_ = possibly_can_discard_mousemove;
ScopedFreeze freeze(this, GetTextObjectModel());
OnBeforePossibleChange();
// Force the Y coordinate to the center of the clip rect. The edit
// behaves strangely when the cursor is dragged vertically: if the cursor
// is in the middle of the text, drags inside the clip rect do nothing,
// and drags outside the clip rect act as if the cursor jumped to the
// left edge of the text. When the cursor is at the right edge, drags of
// just a few pixels vertically end up selecting the "phantom newline"...
// sometimes.
RECT r;
GetRect(&r);
DefWindowProc(WM_MOUSEMOVE, keys,
MAKELPARAM(point.x, (r.bottom - r.top) / 2));
OnAfterPossibleChange();
}
}
int NativeTextfieldWin::OnNCCalcSize(BOOL w_param, LPARAM l_param) {
content_insets_.Set(0, 0, 0, 0);
textfield_->CalculateInsets(&content_insets_);
if (w_param) {
NCCALCSIZE_PARAMS* nc_params =
reinterpret_cast<NCCALCSIZE_PARAMS*>(l_param);
nc_params->rgrc[0].left += content_insets_.left();
nc_params->rgrc[0].right -= content_insets_.right();
nc_params->rgrc[0].top += content_insets_.top();
nc_params->rgrc[0].bottom -= content_insets_.bottom();
} else {
RECT* rect = reinterpret_cast<RECT*>(l_param);
rect->left += content_insets_.left();
rect->right -= content_insets_.right();
rect->top += content_insets_.top();
rect->bottom -= content_insets_.bottom();
}
return 0;
}
void NativeTextfieldWin::OnNCPaint(HRGN region) {
if (!textfield_->draw_border())
return;
HDC hdc = GetWindowDC();
CRect window_rect;
GetWindowRect(&window_rect);
// Convert to be relative to 0x0.
window_rect.MoveToXY(0, 0);
ExcludeClipRect(hdc,
window_rect.left + content_insets_.left(),
window_rect.top + content_insets_.top(),
window_rect.right - content_insets_.right(),
window_rect.bottom - content_insets_.bottom());
HBRUSH brush = CreateSolidBrush(bg_color_);
FillRect(hdc, &window_rect, brush);
DeleteObject(brush);
int part;
int state;
if (win_util::GetWinVersion() < win_util::WINVERSION_VISTA) {
part = EP_EDITTEXT;
if (!textfield_->IsEnabled())
state = ETS_DISABLED;
else if (textfield_->read_only())
state = ETS_READONLY;
else if (!contains_mouse_)
state = ETS_NORMAL;
else
state = ETS_HOT;
} else {
part = EP_EDITBORDER_HVSCROLL;
if (!textfield_->IsEnabled())
state = EPSHV_DISABLED;
else if (GetFocus() == m_hWnd)
state = EPSHV_FOCUSED;
else if (contains_mouse_)
state = EPSHV_HOT;
else
state = EPSHV_NORMAL;
// Vista doesn't appear to have a unique state for readonly.
}
int classic_state =
(!textfield_->IsEnabled() || textfield_->read_only()) ? DFCS_INACTIVE : 0;
gfx::NativeTheme::instance()->PaintTextField(hdc, part, state, classic_state,
&window_rect, bg_color_, false,
true);
// NOTE: I tried checking the transparent property of the theme and invoking
// drawParentBackground, but it didn't seem to make a difference.
ReleaseDC(hdc);
}
void NativeTextfieldWin::OnNonLButtonDown(UINT keys, const CPoint& point) {
// Interestingly, the edit doesn't seem to cancel triple clicking when the
// x-buttons (which usually means "thumb buttons") are pressed, so we only
// call this for M and R down.
tracking_double_click_ = false;
SetMsgHandled(false);
}
void NativeTextfieldWin::OnPaste() {
if (textfield_->read_only() || !ViewsDelegate::views_delegate)
return;
Clipboard* clipboard = ViewsDelegate::views_delegate->GetClipboard();
if (!clipboard->IsFormatAvailable(Clipboard::GetPlainTextWFormatType()))
return;
std::wstring clipboard_str;
clipboard->ReadText(&clipboard_str);
if (!clipboard_str.empty()) {
std::wstring collapsed(CollapseWhitespace(clipboard_str, false));
if (textfield_->style() & Textfield::STYLE_LOWERCASE)
collapsed = l10n_util::ToLower(collapsed);
// Force a Paste operation to trigger OnContentsChanged, even if identical
// contents are pasted into the text box.
text_before_change_.clear();
ReplaceSel(collapsed.c_str(), true);
}
}
void NativeTextfieldWin::OnSetFocus(HWND hwnd) {
SetMsgHandled(FALSE); // We still want the default processing of the message.
views::FocusManager* focus_manager = textfield_->GetFocusManager();
if (!focus_manager) {
NOTREACHED();
return;
}
focus_manager->SetFocusedView(textfield_);
}
void NativeTextfieldWin::OnSysChar(TCHAR ch, UINT repeat_count, UINT flags) {
// Nearly all alt-<xxx> combos result in beeping rather than doing something
// useful, so we discard most. Exceptions:
// * ctrl-alt-<xxx>, which is sometimes important, generates WM_CHAR instead
// of WM_SYSCHAR, so it doesn't need to be handled here.
// * alt-space gets translated by the default WM_SYSCHAR handler to a
// WM_SYSCOMMAND to open the application context menu, so we need to allow
// it through.
if (ch == VK_SPACE)
SetMsgHandled(false);
}
void NativeTextfieldWin::HandleKeystroke(UINT message,
TCHAR key,
UINT repeat_count,
UINT flags) {
ScopedFreeze freeze(this, GetTextObjectModel());
Textfield::Controller* controller = textfield_->GetController();
bool handled = false;
if (controller) {
handled = controller->HandleKeystroke(textfield_,
Textfield::Keystroke(message, key, repeat_count, flags));
}
if (!handled) {
OnBeforePossibleChange();
DefWindowProc(message, key, MAKELPARAM(repeat_count, flags));
OnAfterPossibleChange();
}
}
void NativeTextfieldWin::OnBeforePossibleChange() {
// Record our state.
text_before_change_ = GetText();
}
void NativeTextfieldWin::OnAfterPossibleChange() {
// Prevent the user from selecting the "phantom newline" at the end of the
// edit. If they try, we just silently move the end of the selection back to
// the end of the real text.
CHARRANGE new_sel;
GetSel(new_sel);
const int length = GetTextLength();
if (new_sel.cpMax > length) {
new_sel.cpMax = length;
if (new_sel.cpMin > length)
new_sel.cpMin = length;
SetSel(new_sel);
}
std::wstring new_text(GetText());
if (new_text != text_before_change_) {
if (ime_discard_composition_ && ime_composition_start_ >= 0 &&
ime_composition_length_ > 0) {
// A string retrieved with a GetText() call contains a string being
// composed by an IME. We remove the composition string from this search
// string.
new_text.erase(ime_composition_start_, ime_composition_length_);
ime_composition_start_ = 0;
ime_composition_length_ = 0;
if (new_text.empty())
return;
}
textfield_->SyncText();
if (textfield_->GetController())
textfield_->GetController()->ContentsChanged(textfield_, new_text);
}
}
LONG NativeTextfieldWin::ClipXCoordToVisibleText(LONG x,
bool is_triple_click) const {
// Clip the X coordinate to the left edge of the text. Careful:
// PosFromChar(0) may return a negative X coordinate if the beginning of the
// text has scrolled off the edit, so don't go past the clip rect's edge.
PARAFORMAT2 pf2;
GetParaFormat(pf2);
// Calculation of the clipped coordinate is more complicated if the paragraph
// layout is RTL layout, or if there is RTL characters inside the LTR layout
// paragraph.
bool ltr_text_in_ltr_layout = true;
if ((pf2.wEffects & PFE_RTLPARA) ||
l10n_util::StringContainsStrongRTLChars(GetText())) {
ltr_text_in_ltr_layout = false;
}
const int length = GetTextLength();
RECT r;
GetRect(&r);
// The values returned by PosFromChar() seem to refer always
// to the left edge of the character's bounding box.
const LONG first_position_x = PosFromChar(0).x;
LONG min_x = first_position_x;
if (!ltr_text_in_ltr_layout) {
for (int i = 1; i < length; ++i)
min_x = std::min(min_x, PosFromChar(i).x);
}
const LONG left_bound = std::max(r.left, min_x);
// PosFromChar(length) is a phantom character past the end of the text. It is
// not necessarily a right bound; in RTL controls it may be a left bound. So
// treat it as a right bound only if it is to the right of the first
// character.
LONG right_bound = r.right;
LONG end_position_x = PosFromChar(length).x;
if (end_position_x >= first_position_x) {
right_bound = std::min(right_bound, end_position_x); // LTR case.
}
// For trailing characters that are 2 pixels wide of less (like "l" in some
// fonts), we have a problem:
// * Clicks on any pixel within the character will place the cursor before
// the character.
// * Clicks on the pixel just after the character will not allow triple-
// click to work properly (true for any last character width).
// So, we move to the last pixel of the character when this is a
// triple-click, and moving to one past the last pixel in all other
// scenarios. This way, all clicks that can move the cursor will place it at
// the end of the text, but triple-click will still work.
if (x < left_bound) {
return (is_triple_click && ltr_text_in_ltr_layout) ? left_bound - 1 :
left_bound;
}
if ((length == 0) || (x < right_bound))
return x;
return is_triple_click ? (right_bound - 1) : right_bound;
}
void NativeTextfieldWin::SetContainsMouse(bool contains_mouse) {
if (contains_mouse == contains_mouse_)
return;
contains_mouse_ = contains_mouse;
if (!textfield_->draw_border())
return;
if (contains_mouse_) {
// Register for notification when the mouse leaves. Need to do this so
// that we can reset contains mouse properly.
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(tme);
tme.dwFlags = TME_LEAVE;
tme.hwndTrack = m_hWnd;
tme.dwHoverTime = 0;
TrackMouseEvent(&tme);
}
RedrawWindow(NULL, NULL, RDW_INVALIDATE | RDW_FRAME);
}
ITextDocument* NativeTextfieldWin::GetTextObjectModel() const {
if (!text_object_model_) {
CComPtr<IRichEditOle> ole_interface;
ole_interface.Attach(GetOleInterface());
text_object_model_ = ole_interface;
}
return text_object_model_;
}
void NativeTextfieldWin::BuildContextMenu() {
if (context_menu_contents_.get())
return;
context_menu_contents_.reset(new SimpleMenuModel(this));
context_menu_contents_->AddItemWithStringId(IDS_APP_UNDO, IDS_APP_UNDO);
context_menu_contents_->AddSeparator();
context_menu_contents_->AddItemWithStringId(IDS_APP_CUT, IDS_APP_CUT);
context_menu_contents_->AddItemWithStringId(IDS_APP_COPY, IDS_APP_COPY);
context_menu_contents_->AddItemWithStringId(IDS_APP_PASTE, IDS_APP_PASTE);
context_menu_contents_->AddSeparator();
context_menu_contents_->AddItemWithStringId(IDS_APP_SELECT_ALL,
IDS_APP_SELECT_ALL);
context_menu_.reset(new Menu2(context_menu_contents_.get()));
}
////////////////////////////////////////////////////////////////////////////////
// NativeTextfieldWrapper, public:
// static
NativeTextfieldWrapper* NativeTextfieldWrapper::CreateWrapper(
Textfield* field) {
return new NativeTextfieldWin(field);
}
} // namespace views