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Diffstat (limited to 'chrome/browser/autocomplete/autocomplete_edit_view_win.h')
| -rw-r--r-- | chrome/browser/autocomplete/autocomplete_edit_view_win.h | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/chrome/browser/autocomplete/autocomplete_edit_view_win.h b/chrome/browser/autocomplete/autocomplete_edit_view_win.h new file mode 100644 index 0000000..9905f1c --- /dev/null +++ b/chrome/browser/autocomplete/autocomplete_edit_view_win.h @@ -0,0 +1,458 @@ +// Copyright (c) 2006-2008 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. + +#ifndef CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_WIN_H_ +#define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_WIN_H_ + +#include <atlbase.h> +#include <atlapp.h> +#include <atlcrack.h> +#include <atlctrls.h> +#include <atlmisc.h> +#include <tom.h> // For ITextDocument, a COM interface to CRichEditCtrl. + +#include "base/scoped_ptr.h" +#include "chrome/browser/autocomplete/autocomplete.h" +#include "chrome/browser/autocomplete/autocomplete_edit_view.h" +#include "chrome/browser/toolbar_model.h" +#include "chrome/common/gfx/chrome_font.h" +#include "chrome/common/page_transition_types.h" +#include "chrome/views/menu.h" +#include "webkit/glue/window_open_disposition.h" + +class AutocompletePopupModel; +class CommandUpdater; +class Profile; +class TabContents; +namespace views { +class View; +} + +class AutocompleteEditController; +class AutocompleteEditModel; +class AutocompleteEditView; +class AutocompletePopupViewWin; + +// Provides the implementation of an edit control with a drop-down +// autocomplete box. The box itself is implemented in autocomplete_popup.cc +// This file implements the edit box and management for the popup. +class AutocompleteEditViewWin + : public CWindowImpl<AutocompleteEditViewWin, + CRichEditCtrl, + CWinTraits<WS_CHILD | WS_VISIBLE | ES_AUTOHSCROLL | + ES_NOHIDESEL> >, + public CRichEditCommands<AutocompleteEditViewWin>, + public Menu::Delegate, + public AutocompleteEditView { + public: + struct State { + State(const CHARRANGE& selection, + const CHARRANGE& saved_selection_for_focus_change) + : selection(selection), + saved_selection_for_focus_change(saved_selection_for_focus_change) { + } + + const CHARRANGE selection; + const CHARRANGE saved_selection_for_focus_change; + }; + + DECLARE_WND_CLASS(L"Chrome_AutocompleteEditView"); + + AutocompleteEditViewWin(const ChromeFont& font, + AutocompleteEditController* controller, + ToolbarModel* toolbar_model, + views::View* parent_view, + HWND hwnd, + Profile* profile, + CommandUpdater* command_updater, + bool popup_window_mode); + ~AutocompleteEditViewWin(); + + views::View* parent_view() const { return parent_view_; } + + // Implement the AutocompleteEditView interface. + virtual AutocompleteEditModel* model() { return model_.get(); } + virtual const AutocompleteEditModel* model() const { return model_.get(); } + + virtual void SaveStateToTab(TabContents* tab); + + virtual void Update(const TabContents* tab_for_state_restoring); + + virtual void OpenURL(const GURL& url, + WindowOpenDisposition disposition, + PageTransition::Type transition, + const GURL& alternate_nav_url, + size_t selected_line, + const std::wstring& keyword); + + virtual std::wstring GetText() const; + + virtual void SetUserText(const std::wstring& text) { + SetUserText(text, text, true); + } + virtual void SetUserText(const std::wstring& text, + const std::wstring& display_text, + bool update_popup); + + virtual void SetWindowTextAndCaretPos(const std::wstring& text, + size_t caret_pos); + + virtual bool IsSelectAll(); + virtual void SelectAll(bool reversed); + virtual void RevertAll(); + + virtual void UpdatePopup(); + virtual void ClosePopup(); + + virtual void OnTemporaryTextMaybeChanged(const std::wstring& display_text, + bool save_original_selection); + virtual bool OnInlineAutocompleteTextMaybeChanged( + const std::wstring& display_text, size_t user_text_length); + virtual void OnRevertTemporaryText(); + virtual void OnBeforePossibleChange(); + virtual bool OnAfterPossibleChange(); + + // Exposes custom IAccessible implementation to the overall MSAA hierarchy. + IAccessible* GetIAccessible(); + + void SetDropHighlightPosition(int position); + int drop_highlight_position() const { return drop_highlight_position_; } + + // Returns true if a drag a drop session was initiated by this edit. + bool in_drag() const { return in_drag_; } + + // Moves the selected text to the specified position. + void MoveSelectedText(int new_position); + + // Inserts the text at the specified position. + void InsertText(int position, const std::wstring& text); + + // Invokes CanPasteAndGo with the specified text, and if successful navigates + // to the appropriate URL. The behavior of this is the same as if the user + // typed in the specified text and pressed enter. + void PasteAndGo(const std::wstring& text); + + // Called before an accelerator is processed to give us a chance to override + // it. + bool OverrideAccelerator(const views::Accelerator& accelerator); + + // Handler for external events passed in to us. The View that owns us may + // send us events that we should treat as if they were events on us. + void HandleExternalMsg(UINT msg, UINT flags, const CPoint& screen_point); + + // CWindowImpl + BEGIN_MSG_MAP(AutocompleteEdit) + MSG_WM_CHAR(OnChar) + MSG_WM_CONTEXTMENU(OnContextMenu) + MSG_WM_COPY(OnCopy) + MSG_WM_CUT(OnCut) + MESSAGE_HANDLER_EX(WM_GETOBJECT, OnGetObject) + MESSAGE_HANDLER_EX(WM_IME_COMPOSITION, OnImeComposition) + MSG_WM_KEYDOWN(OnKeyDown) + MSG_WM_KEYUP(OnKeyUp) + MSG_WM_KILLFOCUS(OnKillFocus) + MSG_WM_LBUTTONDBLCLK(OnLButtonDblClk) + MSG_WM_LBUTTONDOWN(OnLButtonDown) + MSG_WM_LBUTTONUP(OnLButtonUp) + MSG_WM_MBUTTONDOWN(OnNonLButtonDown) + MSG_WM_MBUTTONUP(OnNonLButtonUp) + MSG_WM_MOUSEACTIVATE(OnMouseActivate) + MSG_WM_MOUSEMOVE(OnMouseMove) + MSG_WM_PAINT(OnPaint) + MSG_WM_PASTE(OnPaste) + MSG_WM_RBUTTONDOWN(OnNonLButtonDown) + MSG_WM_RBUTTONUP(OnNonLButtonUp) + MSG_WM_SETFOCUS(OnSetFocus) + MSG_WM_SYSCHAR(OnSysChar) // WM_SYSxxx == WM_xxx with ALT down + MSG_WM_SYSKEYDOWN(OnKeyDown) + MSG_WM_SYSKEYUP(OnKeyUp) + DEFAULT_REFLECTION_HANDLER() // avoids black margin area + END_MSG_MAP() + + // Menu::Delegate + virtual bool IsCommandEnabled(int id) const; + virtual bool GetContextualLabel(int id, std::wstring* out) const; + virtual void ExecuteCommand(int id); + + private: + // This object freezes repainting of the edit until the object is destroyed. + // Some methods of the CRichEditCtrl draw synchronously to the screen. If we + // don't freeze, the user will see a rapid series of calls to these as + // flickers. + // + // Freezing the control while it is already frozen is permitted; the control + // will unfreeze once both freezes are released (the freezes stack). + class ScopedFreeze { + public: + ScopedFreeze(AutocompleteEditViewWin* edit, + ITextDocument* text_object_model); + ~ScopedFreeze(); + + private: + AutocompleteEditViewWin* const edit_; + ITextDocument* const text_object_model_; + + DISALLOW_COPY_AND_ASSIGN(ScopedFreeze); + }; + + // This object suspends placing any operations on the edit's undo stack until + // the object is destroyed. If we don't do this, some of the operations we + // perform behind the user's back will be undoable by the user, which feels + // bizarre and confusing. + class ScopedSuspendUndo { + public: + explicit ScopedSuspendUndo(ITextDocument* text_object_model); + ~ScopedSuspendUndo(); + + private: + ITextDocument* const text_object_model_; + + DISALLOW_COPY_AND_ASSIGN(ScopedSuspendUndo); + }; + + // Replacement word-breaking proc for the rich edit control. + static int CALLBACK WordBreakProc(LPTSTR edit_text, + int current_pos, + int num_bytes, + int action); + + // Returns true if |edit_text| starting at |current_pos| is "://". + static bool SchemeEnd(LPTSTR edit_text, int current_pos, int length); + + // Message handlers + void OnChar(TCHAR ch, UINT repeat_count, UINT flags); + void OnContextMenu(HWND window, const CPoint& point); + void OnCopy(); + void OnCut(); + LRESULT OnGetObject(UINT uMsg, WPARAM wparam, LPARAM lparam); + LRESULT OnImeComposition(UINT message, WPARAM wparam, LPARAM lparam); + void OnKeyDown(TCHAR key, UINT repeat_count, UINT flags); + void OnKeyUp(TCHAR key, UINT repeat_count, UINT flags); + void OnKillFocus(HWND focus_wnd); + void OnLButtonDblClk(UINT keys, const CPoint& point); + void OnLButtonDown(UINT keys, const CPoint& point); + void OnLButtonUp(UINT keys, const CPoint& point); + LRESULT OnMouseActivate(HWND window, UINT hit_test, UINT mouse_message); + void OnMouseMove(UINT keys, const CPoint& point); + void OnNonLButtonDown(UINT keys, const CPoint& point); + void OnNonLButtonUp(UINT keys, const CPoint& point); + void OnPaint(HDC bogus_hdc); + void OnPaste(); + void OnSetFocus(HWND focus_wnd); + void OnSysChar(TCHAR ch, UINT repeat_count, UINT flags); + + // Helper function for OnChar() and OnKeyDown() that handles keystrokes that + // could change the text in the edit. + void HandleKeystroke(UINT message, TCHAR key, UINT repeat_count, UINT flags); + + // Helper functions for OnKeyDown() that handle accelerators applicable when + // we're not read-only and all the time, respectively. These return true if + // they handled the key. + bool OnKeyDownOnlyWritable(TCHAR key, UINT repeat_count, UINT flags); + bool OnKeyDownAllModes(TCHAR key, UINT repeat_count, UINT flags); + + // Like GetSel(), but returns a range where |cpMin| will be larger than + // |cpMax| if the cursor is at the start rather than the end of the selection + // (in other words, tracks selection direction as well as offsets). + // Note the non-Google-style "non-const-ref" argument, which matches GetSel(). + void GetSelection(CHARRANGE& sel) const; + + // Returns the currently selected text of the edit control. + std::wstring GetSelectedText() const; + + // Like SetSel(), but respects the selection direction implied by |start| and + // |end|: if |end| < |start|, the effective cursor will be placed at the + // beginning of the selection. + void SetSelection(LONG start, LONG end); + + // Like SetSelection(), but takes a CHARRANGE. + void SetSelectionRange(const CHARRANGE& sel) { + SetSelection(sel.cpMin, sel.cpMax); + } + + // Places the caret at the given position. This clears any selection. + void PlaceCaretAt(size_t pos); + + // Returns true if |sel| represents a forward or backward selection of all the + // text. + bool IsSelectAllForRange(const CHARRANGE& sel) const; + + // Given an X coordinate in client coordinates, returns that coordinate + // clipped to be within the horizontal bounds of the visible text. + // + // This is used in our mouse handlers to work around quirky behaviors of the + // underlying CRichEditCtrl like not supporting triple-click when the user + // doesn't click on the text itself. + // + // |is_triple_click| should be true iff this is the third click of a triple + // click. Sadly, we need to clip slightly differently in this case. + LONG ClipXCoordToVisibleText(LONG x, bool is_triple_click) const; + + // Parses the contents of the control for the scheme and the host name. + // Highlights the scheme in green or red depending on it security level. + // If a host name is found, it makes it visually stronger. + void EmphasizeURLComponents(); + + // Erases the portion of the selection in the font's y-adjustment area. For + // some reason the edit draws the selection rect here even though it's not + // part of the font. + void EraseTopOfSelection(CDC* dc, + const CRect& client_rect, + const CRect& paint_clip_rect); + + // Draws a slash across the scheme if desired. + void DrawSlashForInsecureScheme(HDC hdc, + const CRect& client_rect, + const CRect& paint_clip_rect); + + // Renders the drop highlight. + void DrawDropHighlight(HDC hdc, + const CRect& client_rect, + const CRect& paint_clip_rect); + + // Internally invoked whenever the text changes in some way. + void TextChanged(); + + // Returns the current clipboard contents as a string that can be pasted in. + // In addition to just getting CF_UNICODETEXT out, this can also extract URLs + // from bookmarks on the clipboard. + std::wstring GetClipboardText() const; + + // Determines whether the user can "paste and go", given the specified text. + bool CanPasteAndGo(const std::wstring& text) const; + + // Getter for the text_object_model_, used by the ScopedXXX classes. Note + // that the pointer returned here is only valid as long as the + // AutocompleteEdit is still alive. Also, if the underlying call fails, this + // may return NULL. + ITextDocument* GetTextObjectModel() const; + + // Invoked during a mouse move. As necessary starts a drag and drop session. + void StartDragIfNecessary(const CPoint& point); + + // Invoked during a mouse down. If the mouse location is over the selection + // this sets possible_drag_ to true to indicate a drag should start if the + // user moves the mouse far enough to start a drag. + void OnPossibleDrag(const CPoint& point); + + // Invoked when a mouse button is released. If none of the buttons are still + // down, this sets possible_drag_ to false. + void UpdateDragDone(UINT keys); + + // Redraws the necessary region for a drop highlight at the specified + // position. This does nothing if position is beyond the bounds of the + // text. + void RepaintDropHighlight(int position); + + scoped_ptr<AutocompleteEditModel> model_; + + scoped_ptr<AutocompletePopupViewWin> popup_view_; + + AutocompleteEditController* controller_; + + // The parent view for the edit, used to align the popup and for + // accessibility. + views::View* parent_view_; + + ToolbarModel* toolbar_model_; + + // The object that handles additional command functionality exposed on the + // edit, such as invoking the keyword editor. + CommandUpdater* command_updater_; + + // When true, the location bar view is read only and also is has a slightly + // different presentation (font size / color). This is used for popups. + bool popup_window_mode_; + + // Non-null when the edit is gaining focus from a left click. This is only + // needed between when WM_MOUSEACTIVATE and WM_LBUTTONDOWN get processed. It + // serves two purposes: first, by communicating to OnLButtonDown() that we're + // gaining focus from a left click, it allows us to work even with the + // inconsistent order in which various Windows messages get sent (see comments + // in OnMouseActivate()). Second, by holding the edit frozen, it ensures that + // when we process WM_SETFOCUS the edit won't first redraw itself with the + // caret at the beginning, and then have it blink to where the mouse cursor + // really is shortly afterward. + scoped_ptr<ScopedFreeze> gaining_focus_; + + // When the user clicks to give us focus, we watch to see if they're clicking + // or dragging. When they're clicking, we select nothing until mouseup, then + // select all the text in the edit. During this process, tracking_click_ is + // true and mouse_down_point_ holds the original click location. At other + // times, tracking_click_ is false, and the contents of mouse_down_point_ + // should be ignored. + bool tracking_click_; + CPoint mouse_down_point_; + + // We need to know if the user triple-clicks, so track double click points + // and times so we can see if subsequent clicks are actually triple clicks. + bool tracking_double_click_; + CPoint double_click_point_; + DWORD double_click_time_; + + // Used to discard unnecessary WM_MOUSEMOVE events after the first such + // unnecessary event. See detailed comments in OnMouseMove(). + bool can_discard_mousemove_; + + // Variables for tracking state before and after a possible change. + std::wstring text_before_change_; + CHARRANGE sel_before_change_; + + // Set at the same time the model's original_* members are set, and valid in + // the same cases. + CHARRANGE original_selection_; + + // Holds the user's selection across focus changes. cpMin holds -1 when + // there is no saved selection. + CHARRANGE saved_selection_for_focus_change_; + + // The context menu for the edit. + scoped_ptr<Menu> context_menu_; + + // Font we're using. We keep a reference to make sure the font supplied to + // the constructor doesn't go away before we do. + ChromeFont font_; + + // Metrics about the font, which we keep so we don't need to recalculate them + // every time we paint. |font_y_adjustment_| is the number of pixels we need + // to shift the font vertically in order to make its baseline be at our + // desired baseline in the edit. + int font_ascent_; + int font_descent_; + int font_x_height_; + int font_y_adjustment_; + + // If true, indicates the mouse is down and if the mouse is moved enough we + // should start a drag. + bool possible_drag_; + + // If true, we're in a call to DoDragDrop. + bool in_drag_; + + // If true indicates we've run a drag and drop session. This is used to + // avoid starting two drag and drop sessions if the drag is canceled while + // the mouse is still down. + bool initiated_drag_; + + // Position of the drop highlight. If this is -1, there is no drop highlight. + int drop_highlight_position_; + + // Security UI-related data. + COLORREF background_color_; + ToolbarModel::SecurityLevel scheme_security_level_; + + // This interface is useful for accessing the CRichEditCtrl at a low level. + mutable CComQIPtr<ITextDocument> text_object_model_; + + // This contains the scheme char start and stop indexes that should be + // striken-out when displaying an insecure scheme. + url_parse::Component insecure_scheme_component_; + + // Instance of accessibility information and handling. + mutable CComPtr<IAccessible> autocomplete_accessibility_; + + DISALLOW_COPY_AND_ASSIGN(AutocompleteEditViewWin); +}; + +#endif // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_WIN_H_ |