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// Copyright 2014 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "fpdfsdk/pwl/cpwl_combo_box.h"
#include <algorithm>
#include <utility>
#include "constants/ascii.h"
#include "fpdfsdk/pwl/cpwl_cbbutton.h"
#include "fpdfsdk/pwl/cpwl_cblistbox.h"
#include "fpdfsdk/pwl/cpwl_edit.h"
#include "fpdfsdk/pwl/ipwl_fillernotify.h"
#include "public/fpdf_fwlevent.h"
namespace {
constexpr float kComboBoxDefaultFontSize = 12.0f;
constexpr int kDefaultButtonWidth = 13;
} // namespace
CPWL_ComboBox::CPWL_ComboBox(
const CreateParams& cp,
std::unique_ptr<IPWL_FillerNotify::PerWindowData> pAttachedData)
: CPWL_Wnd(cp, std::move(pAttachedData)) {
GetCreationParams()->dwFlags &= ~PWS_VSCROLL;
}
CPWL_ComboBox::~CPWL_ComboBox() = default;
void CPWL_ComboBox::OnDestroy() {
// Until cleanup takes place in the virtual destructor for CPWL_Wnd
// subclasses, implement the virtual OnDestroy method that does the
// cleanup first, then invokes the superclass OnDestroy ... gee,
// like a dtor would.
m_pList.ExtractAsDangling();
m_pButton.ExtractAsDangling();
m_pEdit.ExtractAsDangling();
CPWL_Wnd::OnDestroy();
}
void CPWL_ComboBox::SetFocus() {
if (m_pEdit)
m_pEdit->SetFocus();
}
void CPWL_ComboBox::KillFocus() {
if (!SetPopup(false))
return;
CPWL_Wnd::KillFocus();
}
WideString CPWL_ComboBox::GetSelectedText() {
if (m_pEdit)
return m_pEdit->GetSelectedText();
return WideString();
}
void CPWL_ComboBox::ReplaceAndKeepSelection(const WideString& text) {
if (m_pEdit)
m_pEdit->ReplaceAndKeepSelection(text);
}
void CPWL_ComboBox::ReplaceSelection(const WideString& text) {
if (m_pEdit)
m_pEdit->ReplaceSelection(text);
}
bool CPWL_ComboBox::SelectAllText() {
return m_pEdit && m_pEdit->SelectAllText();
}
bool CPWL_ComboBox::CanUndo() {
return m_pEdit && m_pEdit->CanUndo();
}
bool CPWL_ComboBox::CanRedo() {
return m_pEdit && m_pEdit->CanRedo();
}
bool CPWL_ComboBox::Undo() {
return m_pEdit && m_pEdit->Undo();
}
bool CPWL_ComboBox::Redo() {
return m_pEdit && m_pEdit->Redo();
}
WideString CPWL_ComboBox::GetText() {
return m_pEdit ? m_pEdit->GetText() : WideString();
}
void CPWL_ComboBox::SetText(const WideString& text) {
if (m_pEdit)
m_pEdit->SetText(text);
}
void CPWL_ComboBox::AddString(const WideString& str) {
if (m_pList)
m_pList->AddString(str);
}
int32_t CPWL_ComboBox::GetSelect() const {
return m_nSelectItem;
}
void CPWL_ComboBox::SetSelect(int32_t nItemIndex) {
if (m_pList)
m_pList->Select(nItemIndex);
m_pEdit->SetText(m_pList->GetText());
m_nSelectItem = nItemIndex;
}
void CPWL_ComboBox::SetEditSelection(int32_t nStartChar, int32_t nEndChar) {
if (m_pEdit)
m_pEdit->SetSelection(nStartChar, nEndChar);
}
void CPWL_ComboBox::ClearSelection() {
if (m_pEdit)
m_pEdit->ClearSelection();
}
void CPWL_ComboBox::CreateChildWnd(const CreateParams& cp) {
CreateEdit(cp);
CreateButton(cp);
CreateListBox(cp);
}
void CPWL_ComboBox::CreateEdit(const CreateParams& cp) {
if (m_pEdit)
return;
CreateParams ecp = cp;
ecp.dwFlags =
PWS_VISIBLE | PWS_BORDER | PES_CENTER | PES_AUTOSCROLL | PES_UNDO;
if (HasFlag(PWS_AUTOFONTSIZE))
ecp.dwFlags |= PWS_AUTOFONTSIZE;
if (!HasFlag(PCBS_ALLOWCUSTOMTEXT))
ecp.dwFlags |= PWS_READONLY;
ecp.rcRectWnd = CFX_FloatRect();
ecp.dwBorderWidth = 0;
ecp.nBorderStyle = BorderStyle::kSolid;
auto pEdit = std::make_unique<CPWL_Edit>(ecp, CloneAttachedData());
m_pEdit = pEdit.get();
AddChild(std::move(pEdit));
m_pEdit->Realize();
}
void CPWL_ComboBox::CreateButton(const CreateParams& cp) {
if (m_pButton)
return;
CreateParams bcp = cp;
bcp.dwFlags = PWS_VISIBLE | PWS_BORDER | PWS_BACKGROUND;
bcp.sBackgroundColor = CFX_Color(CFX_Color::Type::kRGB, 220.0f / 255.0f,
220.0f / 255.0f, 220.0f / 255.0f);
bcp.sBorderColor = kDefaultBlackColor;
bcp.dwBorderWidth = 2;
bcp.nBorderStyle = BorderStyle::kBeveled;
bcp.eCursorType = IPWL_FillerNotify::CursorStyle::kArrow;
auto pButton = std::make_unique<CPWL_CBButton>(bcp, CloneAttachedData());
m_pButton = pButton.get();
AddChild(std::move(pButton));
m_pButton->Realize();
}
void CPWL_ComboBox::CreateListBox(const CreateParams& cp) {
if (m_pList)
return;
CreateParams lcp = cp;
lcp.dwFlags = PWS_BORDER | PWS_BACKGROUND | PLBS_HOVERSEL | PWS_VSCROLL;
lcp.nBorderStyle = BorderStyle::kSolid;
lcp.dwBorderWidth = 1;
lcp.eCursorType = IPWL_FillerNotify::CursorStyle::kArrow;
lcp.rcRectWnd = CFX_FloatRect();
lcp.fFontSize =
(cp.dwFlags & PWS_AUTOFONTSIZE) ? kComboBoxDefaultFontSize : cp.fFontSize;
if (cp.sBorderColor.nColorType == CFX_Color::Type::kTransparent)
lcp.sBorderColor = kDefaultBlackColor;
if (cp.sBackgroundColor.nColorType == CFX_Color::Type::kTransparent)
lcp.sBackgroundColor = kDefaultWhiteColor;
auto pList = std::make_unique<CPWL_CBListBox>(lcp, CloneAttachedData());
m_pList = pList.get();
AddChild(std::move(pList));
m_pList->Realize();
}
bool CPWL_ComboBox::RepositionChildWnd() {
ObservedPtr<CPWL_ComboBox> this_observed(this);
const CFX_FloatRect rcClient = this_observed->GetClientRect();
if (this_observed->m_bPopup) {
const float fOldWindowHeight = this_observed->m_rcOldWindow.Height();
const float fOldClientHeight = fOldWindowHeight - GetBorderWidth() * 2;
CFX_FloatRect rcList = CPWL_Wnd::GetWindowRect();
CFX_FloatRect rcButton = rcClient;
rcButton.left =
std::max(rcButton.right - kDefaultButtonWidth, rcClient.left);
CFX_FloatRect rcEdit = rcClient;
rcEdit.right = std::max(rcButton.left - 1.0f, rcEdit.left);
if (this_observed->m_bBottom) {
rcButton.bottom = rcButton.top - fOldClientHeight;
rcEdit.bottom = rcEdit.top - fOldClientHeight;
rcList.top -= fOldWindowHeight;
} else {
rcButton.top = rcButton.bottom + fOldClientHeight;
rcEdit.top = rcEdit.bottom + fOldClientHeight;
rcList.bottom += fOldWindowHeight;
}
if (this_observed->m_pButton) {
this_observed->m_pButton->Move(rcButton, true, false);
if (!this_observed) {
return false;
}
}
if (this_observed->m_pEdit) {
this_observed->m_pEdit->Move(rcEdit, true, false);
if (!this_observed) {
return false;
}
}
if (this_observed->m_pList) {
if (!this_observed->m_pList->SetVisible(true) || !this_observed) {
return false;
}
if (!this_observed->m_pList->Move(rcList, true, false) ||
!this_observed) {
return false;
}
this_observed->m_pList->ScrollToListItem(this_observed->m_nSelectItem);
if (!this_observed) {
return false;
}
}
return true;
}
CFX_FloatRect rcButton = rcClient;
rcButton.left = std::max(rcButton.right - kDefaultButtonWidth, rcClient.left);
if (this_observed->m_pButton) {
this_observed->m_pButton->Move(rcButton, true, false);
if (!this_observed) {
return false;
}
}
CFX_FloatRect rcEdit = rcClient;
rcEdit.right = std::max(rcButton.left - 1.0f, rcEdit.left);
if (this_observed->m_pEdit) {
this_observed->m_pEdit->Move(rcEdit, true, false);
if (!this_observed) {
return false;
}
}
if (this_observed->m_pList) {
if (!this_observed->m_pList->SetVisible(false)) {
this_observed->m_pList = nullptr; // Gone, dangling even.
return false;
}
if (!this_observed) {
return false;
}
}
return true;
}
void CPWL_ComboBox::SelectAll() {
if (m_pEdit && HasFlag(PCBS_ALLOWCUSTOMTEXT))
m_pEdit->SelectAllText();
}
CFX_FloatRect CPWL_ComboBox::GetFocusRect() const {
return CFX_FloatRect();
}
bool CPWL_ComboBox::SetPopup(bool bPopup) {
ObservedPtr<CPWL_ComboBox> this_observed(this);
if (!this_observed->m_pList) {
return true;
}
if (bPopup == this_observed->m_bPopup) {
return true;
}
float fListHeight = this_observed->m_pList->GetContentRect().Height();
if (!FXSYS_IsFloatBigger(fListHeight, 0.0f)) {
return true;
}
if (!bPopup) {
this_observed->m_bPopup = false;
return Move(this_observed->m_rcOldWindow, true, true);
}
if (GetFillerNotify()->OnPopupPreOpen(GetAttachedData(), {})) {
return !!this_observed;
}
if (!this_observed) {
return false;
}
float fBorderWidth = this_observed->m_pList->GetBorderWidth() * 2;
float fPopupMin = 0.0f;
if (this_observed->m_pList->GetCount() > 3) {
fPopupMin = this_observed->m_pList->GetFirstHeight() * 3 + fBorderWidth;
}
float fPopupMax = fListHeight + fBorderWidth;
bool bBottom;
float fPopupRet;
this_observed->GetFillerNotify()->QueryWherePopup(
this_observed->GetAttachedData(), fPopupMin, fPopupMax, &bBottom,
&fPopupRet);
if (!FXSYS_IsFloatBigger(fPopupRet, 0.0f)) {
return true;
}
this_observed->m_rcOldWindow = this_observed->CPWL_Wnd::GetWindowRect();
this_observed->m_bPopup = bPopup;
this_observed->m_bBottom = bBottom;
CFX_FloatRect rcWindow = this_observed->m_rcOldWindow;
if (bBottom) {
rcWindow.bottom -= fPopupRet;
} else {
rcWindow.top += fPopupRet;
}
if (!this_observed->Move(rcWindow, true, true)) {
return false;
}
this_observed->GetFillerNotify()->OnPopupPostOpen(
this_observed->GetAttachedData(), {});
return !!this_observed;
}
bool CPWL_ComboBox::OnKeyDown(FWL_VKEYCODE nKeyCode,
Mask<FWL_EVENTFLAG> nFlag) {
ObservedPtr<CPWL_ComboBox> this_observed(this);
if (!this_observed->m_pList) {
return false;
}
if (!this_observed->m_pEdit) {
return false;
}
this_observed->m_nSelectItem = -1;
switch (nKeyCode) {
case FWL_VKEY_Up:
if (this_observed->m_pList->GetCurSel() > 0) {
if (this_observed->GetFillerNotify()->OnPopupPreOpen(GetAttachedData(),
nFlag) ||
!this_observed) {
return false;
}
if (this_observed->GetFillerNotify()->OnPopupPostOpen(GetAttachedData(),
nFlag) ||
!this_observed) {
return false;
}
if (this_observed->m_pList->IsMovementKey(nKeyCode)) {
if (this_observed->m_pList->OnMovementKeyDown(nKeyCode, nFlag) ||
!this_observed) {
return false;
}
this_observed->SetSelectText();
}
}
return true;
case FWL_VKEY_Down:
if (this_observed->m_pList->GetCurSel() <
this_observed->m_pList->GetCount() - 1) {
if (this_observed->GetFillerNotify()->OnPopupPreOpen(GetAttachedData(),
nFlag) ||
!this_observed) {
return false;
}
if (this_observed->GetFillerNotify()->OnPopupPostOpen(GetAttachedData(),
nFlag) ||
!this_observed) {
return false;
}
if (this_observed->m_pList->IsMovementKey(nKeyCode)) {
if (this_observed->m_pList->OnMovementKeyDown(nKeyCode, nFlag) ||
!this_observed) {
return false;
}
this_observed->SetSelectText();
}
}
return true;
default:
break;
}
if (this_observed->HasFlag(PCBS_ALLOWCUSTOMTEXT)) {
return this_observed->m_pEdit->OnKeyDown(nKeyCode, nFlag);
}
return false;
}
bool CPWL_ComboBox::OnChar(uint16_t nChar, Mask<FWL_EVENTFLAG> nFlag) {
ObservedPtr<CPWL_ComboBox> this_observed(this);
if (!this_observed->m_pList) {
return false;
}
if (!this_observed->m_pEdit) {
return false;
}
// In a combo box if the ENTER/SPACE key is pressed, show the combo box
// options.
switch (nChar) {
case pdfium::ascii::kReturn:
if (!this_observed->SetPopup(!this_observed->IsPopup())) {
return false;
}
this_observed->SetSelectText();
return true;
case pdfium::ascii::kSpace:
// Show the combo box options with space only if the combo box is not
// editable
if (!this_observed->HasFlag(PCBS_ALLOWCUSTOMTEXT)) {
if (!this_observed->IsPopup()) {
if (!this_observed->SetPopup(/*bPopUp=*/true)) {
return false;
}
this_observed->SetSelectText();
}
return true;
}
break;
default:
break;
}
this_observed->m_nSelectItem = -1;
if (this_observed->HasFlag(PCBS_ALLOWCUSTOMTEXT)) {
return this_observed->m_pEdit->OnChar(nChar, nFlag);
}
if (this_observed->GetFillerNotify()->OnPopupPreOpen(GetAttachedData(),
nFlag) ||
!this_observed) {
return false;
}
if (this_observed->GetFillerNotify()->OnPopupPostOpen(GetAttachedData(),
nFlag) ||
!this_observed) {
return false;
}
if (!this_observed->m_pList->IsChar(nChar, nFlag)) {
return false;
}
return this_observed->m_pList->OnCharNotify(nChar, nFlag);
}
void CPWL_ComboBox::NotifyLButtonDown(CPWL_Wnd* child, const CFX_PointF& pos) {
if (child == m_pButton) {
(void)SetPopup(!m_bPopup);
// Note, |this| may no longer be viable at this point. If more work needs to
// be done, check the return value of SetPopup().
}
}
void CPWL_ComboBox::NotifyLButtonUp(CPWL_Wnd* child, const CFX_PointF& pos) {
if (!m_pEdit || !m_pList || child != m_pList)
return;
SetSelectText();
SelectAllText();
m_pEdit->SetFocus();
(void)SetPopup(false);
// Note, |this| may no longer be viable at this point. If more work needs to
// be done, check the return value of SetPopup().
}
bool CPWL_ComboBox::IsPopup() const {
return m_bPopup;
}
void CPWL_ComboBox::SetSelectText() {
m_pEdit->SelectAllText();
m_pEdit->ReplaceSelection(m_pList->GetText());
m_pEdit->SelectAllText();
m_nSelectItem = m_pList->GetCurSel();
}