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// Copyright 2014 PDFium Authors. All rights reserved.
// 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 "xfa/fwl/cfwl_combobox.h"
#include "v8/include/cppgc/visitor.h"
#include "xfa/fde/cfde_texteditengine.h"
#include "xfa/fde/cfde_textout.h"
#include "xfa/fwl/cfwl_app.h"
#include "xfa/fwl/cfwl_event.h"
#include "xfa/fwl/cfwl_eventselectchanged.h"
#include "xfa/fwl/cfwl_listbox.h"
#include "xfa/fwl/cfwl_messagekey.h"
#include "xfa/fwl/cfwl_messagekillfocus.h"
#include "xfa/fwl/cfwl_messagemouse.h"
#include "xfa/fwl/cfwl_messagesetfocus.h"
#include "xfa/fwl/cfwl_notedriver.h"
#include "xfa/fwl/cfwl_themebackground.h"
#include "xfa/fwl/cfwl_themepart.h"
#include "xfa/fwl/cfwl_themetext.h"
#include "xfa/fwl/cfwl_widgetmgr.h"
#include "xfa/fwl/fwl_widgetdef.h"
#include "xfa/fwl/ifwl_themeprovider.h"
CFWL_ComboBox::CFWL_ComboBox(CFWL_App* app)
: CFWL_Widget(app, Properties(), nullptr),
m_pEdit(cppgc::MakeGarbageCollected<CFWL_ComboEdit>(
app->GetHeap()->GetAllocationHandle(),
app,
Properties(),
this)),
m_pListBox(cppgc::MakeGarbageCollected<CFWL_ComboList>(
app->GetHeap()->GetAllocationHandle(),
app,
Properties{FWL_WGTSTYLE_Border | FWL_WGTSTYLE_VScroll, 0,
FWL_WGTSTATE_Invisible},
this)) {}
CFWL_ComboBox::~CFWL_ComboBox() = default;
void CFWL_ComboBox::Trace(cppgc::Visitor* visitor) const {
CFWL_Widget::Trace(visitor);
visitor->Trace(m_pEdit);
visitor->Trace(m_pListBox);
}
FWL_Type CFWL_ComboBox::GetClassID() const {
return FWL_Type::ComboBox;
}
void CFWL_ComboBox::AddString(const WideString& wsText) {
m_pListBox->AddString(wsText);
}
void CFWL_ComboBox::RemoveAt(int32_t iIndex) {
m_pListBox->RemoveAt(iIndex);
}
void CFWL_ComboBox::RemoveAll() {
m_pListBox->DeleteAll();
}
void CFWL_ComboBox::ModifyStylesEx(uint32_t dwStylesExAdded,
uint32_t dwStylesExRemoved) {
bool bAddDropDown = !!(dwStylesExAdded & FWL_STYLEEXT_CMB_DropDown);
bool bDelDropDown = !!(dwStylesExRemoved & FWL_STYLEEXT_CMB_DropDown);
dwStylesExRemoved &= ~FWL_STYLEEXT_CMB_DropDown;
m_Properties.m_dwStyleExes |= FWL_STYLEEXT_CMB_DropDown;
if (bAddDropDown)
m_pEdit->ModifyStylesEx(0, FWL_STYLEEXT_EDT_ReadOnly);
else if (bDelDropDown)
m_pEdit->ModifyStylesEx(FWL_STYLEEXT_EDT_ReadOnly, 0);
CFWL_Widget::ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
}
void CFWL_ComboBox::Update() {
if (IsLocked())
return;
if (m_pEdit)
ResetEditAlignment();
Layout();
}
FWL_WidgetHit CFWL_ComboBox::HitTest(const CFX_PointF& point) {
CFX_RectF rect(0, 0, m_WidgetRect.width - m_BtnRect.width,
m_WidgetRect.height);
if (rect.Contains(point))
return FWL_WidgetHit::Edit;
if (m_BtnRect.Contains(point))
return FWL_WidgetHit::Client;
if (IsDropListVisible()) {
rect = m_pListBox->GetWidgetRect();
if (rect.Contains(point))
return FWL_WidgetHit::Client;
}
return FWL_WidgetHit::Unknown;
}
void CFWL_ComboBox::DrawWidget(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& matrix) {
pGraphics->SaveGraphState();
pGraphics->ConcatMatrix(&matrix);
if (!m_BtnRect.IsEmpty(0.1f)) {
CFWL_ThemeBackground param;
param.m_pWidget = this;
param.m_iPart = CFWL_Part::DropDownButton;
param.m_dwStates = m_iBtnState;
param.m_pGraphics = pGraphics;
param.m_PartRect = m_BtnRect;
GetThemeProvider()->DrawBackground(param);
}
pGraphics->RestoreGraphState();
if (m_pEdit) {
CFX_RectF rtEdit = m_pEdit->GetWidgetRect();
CFX_Matrix mt(1, 0, 0, 1, rtEdit.left, rtEdit.top);
mt.Concat(matrix);
m_pEdit->DrawWidget(pGraphics, mt);
}
if (m_pListBox && IsDropListVisible()) {
CFX_RectF rtList = m_pListBox->GetWidgetRect();
CFX_Matrix mt(1, 0, 0, 1, rtList.left, rtList.top);
mt.Concat(matrix);
m_pListBox->DrawWidget(pGraphics, mt);
}
}
WideString CFWL_ComboBox::GetTextByIndex(int32_t iIndex) const {
CFWL_ListBox::Item* pItem = m_pListBox->GetItem(m_pListBox, iIndex);
return pItem ? pItem->GetText() : WideString();
}
void CFWL_ComboBox::SetCurSel(int32_t iSel) {
int32_t iCount = m_pListBox->CountItems(nullptr);
bool bClearSel = iSel < 0 || iSel >= iCount;
if (IsDropDownStyle() && m_pEdit) {
if (bClearSel) {
m_pEdit->SetText(WideString());
} else {
CFWL_ListBox::Item* hItem = m_pListBox->GetItem(this, iSel);
m_pEdit->SetText(hItem ? hItem->GetText() : WideString());
}
m_pEdit->Update();
}
m_iCurSel = bClearSel ? -1 : iSel;
}
void CFWL_ComboBox::SetStates(uint32_t dwStates) {
if (IsDropDownStyle() && m_pEdit)
m_pEdit->SetStates(dwStates);
if (m_pListBox)
m_pListBox->SetStates(dwStates);
CFWL_Widget::SetStates(dwStates);
}
void CFWL_ComboBox::RemoveStates(uint32_t dwStates) {
if (IsDropDownStyle() && m_pEdit)
m_pEdit->RemoveStates(dwStates);
if (m_pListBox)
m_pListBox->RemoveStates(dwStates);
CFWL_Widget::RemoveStates(dwStates);
}
void CFWL_ComboBox::SetEditText(const WideString& wsText) {
if (!m_pEdit)
return;
m_pEdit->SetText(wsText);
m_pEdit->Update();
}
WideString CFWL_ComboBox::GetEditText() const {
if (m_pEdit)
return m_pEdit->GetText();
if (!m_pListBox)
return WideString();
CFWL_ListBox::Item* hItem = m_pListBox->GetItem(this, m_iCurSel);
return hItem ? hItem->GetText() : WideString();
}
void CFWL_ComboBox::OpenDropDownList(bool bActivate) {
ShowDropList(bActivate);
}
CFX_RectF CFWL_ComboBox::GetBBox() const {
CFX_RectF rect = m_WidgetRect;
if (!m_pListBox || !IsDropListVisible())
return rect;
CFX_RectF rtList = m_pListBox->GetWidgetRect();
rtList.Offset(rect.left, rect.top);
rect.Union(rtList);
return rect;
}
void CFWL_ComboBox::EditModifyStylesEx(uint32_t dwStylesExAdded,
uint32_t dwStylesExRemoved) {
if (m_pEdit)
m_pEdit->ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
}
void CFWL_ComboBox::ShowDropList(bool bActivate) {
if (IsDropListVisible() == bActivate)
return;
if (bActivate) {
CFWL_Event preEvent(CFWL_Event::Type::PreDropDown, this);
DispatchEvent(&preEvent);
if (!preEvent.GetSrcTarget())
return;
CFWL_ComboList* pComboList = m_pListBox;
int32_t iItems = pComboList->CountItems(nullptr);
if (iItems < 1)
return;
ResetListItemAlignment();
pComboList->ChangeSelected(m_iCurSel);
float fItemHeight = pComboList->CalcItemHeight();
float fBorder = GetCXBorderSize();
float fPopupMin = 0.0f;
if (iItems > 3)
fPopupMin = fItemHeight * 3 + fBorder * 2;
float fPopupMax = fItemHeight * iItems + fBorder * 2;
CFX_RectF rtList(m_ClientRect.left, 0, m_WidgetRect.width, 0);
GetPopupPos(fPopupMin, fPopupMax, m_WidgetRect, &rtList);
m_pListBox->SetWidgetRect(rtList);
m_pListBox->Update();
}
if (bActivate) {
m_pListBox->RemoveStates(FWL_WGTSTATE_Invisible);
CFWL_Event postEvent(CFWL_Event::Type::PostDropDown, this);
DispatchEvent(&postEvent);
} else {
m_pListBox->SetStates(FWL_WGTSTATE_Invisible);
}
CFX_RectF rect = m_pListBox->GetWidgetRect();
rect.Inflate(2, 2);
RepaintRect(rect);
}
void CFWL_ComboBox::MatchEditText() {
WideString wsText = m_pEdit->GetText();
int32_t iMatch = m_pListBox->MatchItem(wsText.AsStringView());
if (iMatch != m_iCurSel) {
m_pListBox->ChangeSelected(iMatch);
if (iMatch >= 0)
SyncEditText(iMatch);
} else if (iMatch >= 0) {
m_pEdit->SetSelected();
}
m_iCurSel = iMatch;
}
void CFWL_ComboBox::SyncEditText(int32_t iListItem) {
CFWL_ListBox::Item* hItem = m_pListBox->GetItem(this, iListItem);
m_pEdit->SetText(hItem ? hItem->GetText() : WideString());
m_pEdit->Update();
m_pEdit->SetSelected();
}
void CFWL_ComboBox::Layout() {
m_ClientRect = GetClientRect();
m_ContentRect = m_ClientRect;
IFWL_ThemeProvider* theme = GetThemeProvider();
float borderWidth = 1;
float fBtn = theme->GetScrollBarWidth();
if (!(GetStylesEx() & FWL_STYLEEXT_CMB_ReadOnly)) {
m_BtnRect =
CFX_RectF(m_ClientRect.right() - fBtn, m_ClientRect.top + borderWidth,
fBtn - borderWidth, m_ClientRect.height - 2 * borderWidth);
}
CFWL_ThemePart part;
part.m_pWidget = this;
CFX_RectF pUIMargin = theme->GetUIMargin(part);
m_ContentRect.Deflate(pUIMargin.left, pUIMargin.top, pUIMargin.width,
pUIMargin.height);
if (!IsDropDownStyle() || !m_pEdit)
return;
CFX_RectF rtEdit(m_ContentRect.left, m_ContentRect.top,
m_ContentRect.width - fBtn, m_ContentRect.height);
m_pEdit->SetWidgetRect(rtEdit);
if (m_iCurSel >= 0) {
CFWL_ListBox::Item* hItem = m_pListBox->GetItem(this, m_iCurSel);
ScopedUpdateLock update_lock(m_pEdit);
m_pEdit->SetText(hItem ? hItem->GetText() : WideString());
}
m_pEdit->Update();
}
void CFWL_ComboBox::ResetEditAlignment() {
if (!m_pEdit)
return;
uint32_t dwAdd = 0;
switch (m_Properties.m_dwStyleExes & FWL_STYLEEXT_CMB_EditHAlignMask) {
case FWL_STYLEEXT_CMB_EditHCenter: {
dwAdd |= FWL_STYLEEXT_EDT_HCenter;
break;
}
default: {
dwAdd |= FWL_STYLEEXT_EDT_HNear;
break;
}
}
switch (m_Properties.m_dwStyleExes & FWL_STYLEEXT_CMB_EditVAlignMask) {
case FWL_STYLEEXT_CMB_EditVCenter: {
dwAdd |= FWL_STYLEEXT_EDT_VCenter;
break;
}
case FWL_STYLEEXT_CMB_EditVFar: {
dwAdd |= FWL_STYLEEXT_EDT_VFar;
break;
}
default: {
dwAdd |= FWL_STYLEEXT_EDT_VNear;
break;
}
}
if (m_Properties.m_dwStyleExes & FWL_STYLEEXT_CMB_EditJustified)
dwAdd |= FWL_STYLEEXT_EDT_Justified;
m_pEdit->ModifyStylesEx(dwAdd, FWL_STYLEEXT_EDT_HAlignMask |
FWL_STYLEEXT_EDT_HAlignModeMask |
FWL_STYLEEXT_EDT_VAlignMask);
}
void CFWL_ComboBox::ResetListItemAlignment() {
if (!m_pListBox)
return;
uint32_t dwAdd = 0;
switch (m_Properties.m_dwStyleExes & FWL_STYLEEXT_CMB_ListItemAlignMask) {
case FWL_STYLEEXT_CMB_ListItemCenterAlign: {
dwAdd |= FWL_STYLEEXT_LTB_CenterAlign;
break;
}
default: {
dwAdd |= FWL_STYLEEXT_LTB_LeftAlign;
break;
}
}
m_pListBox->ModifyStylesEx(dwAdd, FWL_STYLEEXT_CMB_ListItemAlignMask);
}
void CFWL_ComboBox::ProcessSelChanged(bool bLButtonUp) {
m_iCurSel = m_pListBox->GetItemIndex(this, m_pListBox->GetSelItem(0));
if (!IsDropDownStyle()) {
RepaintRect(m_ClientRect);
return;
}
CFWL_ListBox::Item* hItem = m_pListBox->GetItem(this, m_iCurSel);
if (!hItem)
return;
if (m_pEdit) {
m_pEdit->SetText(hItem->GetText());
m_pEdit->Update();
m_pEdit->SetSelected();
}
CFWL_EventSelectChanged ev(this);
ev.bLButtonUp = bLButtonUp;
DispatchEvent(&ev);
}
void CFWL_ComboBox::OnProcessMessage(CFWL_Message* pMessage) {
bool backDefault = true;
switch (pMessage->GetType()) {
case CFWL_Message::Type::kSetFocus: {
backDefault = false;
OnFocusChanged(pMessage, true);
break;
}
case CFWL_Message::Type::kKillFocus: {
backDefault = false;
OnFocusChanged(pMessage, false);
break;
}
case CFWL_Message::Type::kMouse: {
backDefault = false;
CFWL_MessageMouse* pMsg = static_cast<CFWL_MessageMouse*>(pMessage);
switch (pMsg->m_dwCmd) {
case FWL_MouseCommand::LeftButtonDown:
OnLButtonDown(pMsg);
break;
case FWL_MouseCommand::LeftButtonUp:
OnLButtonUp(pMsg);
break;
default:
break;
}
break;
}
case CFWL_Message::Type::kKey: {
backDefault = false;
CFWL_MessageKey* pKey = static_cast<CFWL_MessageKey*>(pMessage);
if (pKey->m_dwCmd == CFWL_MessageKey::Type::kKeyUp)
break;
if (IsDropListVisible() &&
pKey->m_dwCmd == CFWL_MessageKey::Type::kKeyDown) {
bool bListKey = pKey->m_dwKeyCode == XFA_FWL_VKEY_Up ||
pKey->m_dwKeyCode == XFA_FWL_VKEY_Down ||
pKey->m_dwKeyCode == XFA_FWL_VKEY_Return ||
pKey->m_dwKeyCode == XFA_FWL_VKEY_Escape;
if (bListKey) {
m_pListBox->GetDelegate()->OnProcessMessage(pMessage);
break;
}
}
OnKey(pKey);
break;
}
default:
break;
}
// Dst target could be |this|, continue only if not destroyed by above.
if (backDefault && pMessage->GetDstTarget())
CFWL_Widget::OnProcessMessage(pMessage);
}
void CFWL_ComboBox::OnProcessEvent(CFWL_Event* pEvent) {
CFWL_Event::Type type = pEvent->GetType();
if (type == CFWL_Event::Type::Scroll) {
CFWL_EventScroll* pScrollEvent = static_cast<CFWL_EventScroll*>(pEvent);
CFWL_EventScroll pScrollEv(this);
pScrollEv.m_iScrollCode = pScrollEvent->m_iScrollCode;
pScrollEv.m_fPos = pScrollEvent->m_fPos;
DispatchEvent(&pScrollEv);
} else if (type == CFWL_Event::Type::TextWillChange) {
CFWL_Event pTemp(CFWL_Event::Type::EditChanged, this);
DispatchEvent(&pTemp);
}
}
void CFWL_ComboBox::OnDrawWidget(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& matrix) {
DrawWidget(pGraphics, matrix);
}
void CFWL_ComboBox::OnLButtonUp(CFWL_MessageMouse* pMsg) {
if (m_BtnRect.Contains(pMsg->m_pos))
m_iBtnState = CFWL_PartState_Hovered;
else
m_iBtnState = CFWL_PartState_Normal;
RepaintRect(m_BtnRect);
}
void CFWL_ComboBox::OnLButtonDown(CFWL_MessageMouse* pMsg) {
bool bDropDown = IsDropListVisible();
CFX_RectF& rtBtn = bDropDown ? m_BtnRect : m_ClientRect;
if (!rtBtn.Contains(pMsg->m_pos))
return;
if (IsDropListVisible()) {
ShowDropList(false);
return;
}
if (m_pEdit)
MatchEditText();
ShowDropList(true);
}
void CFWL_ComboBox::OnFocusChanged(CFWL_Message* pMsg, bool bSet) {
if (bSet) {
m_Properties.m_dwStates |= FWL_WGTSTATE_Focused;
if ((m_pEdit->GetStates() & FWL_WGTSTATE_Focused) == 0) {
CFWL_MessageSetFocus msg(nullptr, m_pEdit);
m_pEdit->GetDelegate()->OnProcessMessage(&msg);
}
} else {
m_Properties.m_dwStates &= ~FWL_WGTSTATE_Focused;
ShowDropList(false);
CFWL_MessageKillFocus msg(m_pEdit);
m_pEdit->GetDelegate()->OnProcessMessage(&msg);
}
}
void CFWL_ComboBox::OnKey(CFWL_MessageKey* pMsg) {
uint32_t dwKeyCode = pMsg->m_dwKeyCode;
const bool bUp = dwKeyCode == XFA_FWL_VKEY_Up;
const bool bDown = dwKeyCode == XFA_FWL_VKEY_Down;
if (bUp || bDown) {
CFWL_ComboList* pComboList = m_pListBox;
int32_t iCount = pComboList->CountItems(nullptr);
if (iCount < 1)
return;
bool bMatchEqual = false;
int32_t iCurSel = m_iCurSel;
if (m_pEdit) {
WideString wsText = m_pEdit->GetText();
iCurSel = pComboList->MatchItem(wsText.AsStringView());
if (iCurSel >= 0) {
CFWL_ListBox::Item* item = m_pListBox->GetSelItem(iCurSel);
bMatchEqual = wsText == (item ? item->GetText() : WideString());
}
}
if (iCurSel < 0) {
iCurSel = 0;
} else if (bMatchEqual) {
if ((bUp && iCurSel == 0) || (bDown && iCurSel == iCount - 1))
return;
if (bUp)
iCurSel--;
else
iCurSel++;
}
m_iCurSel = iCurSel;
SyncEditText(m_iCurSel);
return;
}
if (m_pEdit)
m_pEdit->GetDelegate()->OnProcessMessage(pMsg);
}
void CFWL_ComboBox::GetPopupPos(float fMinHeight,
float fMaxHeight,
const CFX_RectF& rtAnchor,
CFX_RectF* pPopupRect) {
GetWidgetMgr()->GetAdapterPopupPos(this, fMinHeight, fMaxHeight, rtAnchor,
pPopupRect);
}