blob: c7aaa4471bfd5ae8a419cb75a5e6083f0cdbc7cf [file] [log] [blame]
// 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_listbox.h"
#include <algorithm>
#include <memory>
#include <utility>
#include "core/fxcrt/stl_util.h"
#include "third_party/base/cxx17_backports.h"
#include "third_party/base/numerics/safe_conversions.h"
#include "v8/include/cppgc/visitor.h"
#include "xfa/fde/cfde_textout.h"
#include "xfa/fgas/graphics/cfgas_gegraphics.h"
#include "xfa/fwl/cfwl_app.h"
#include "xfa/fwl/cfwl_messagekey.h"
#include "xfa/fwl/cfwl_messagemouse.h"
#include "xfa/fwl/cfwl_messagemousewheel.h"
#include "xfa/fwl/cfwl_themebackground.h"
#include "xfa/fwl/cfwl_themepart.h"
#include "xfa/fwl/cfwl_themetext.h"
#include "xfa/fwl/fwl_widgetdef.h"
#include "xfa/fwl/ifwl_themeprovider.h"
namespace {
const int kItemTextMargin = 2;
} // namespace
CFWL_ListBox::CFWL_ListBox(CFWL_App* app,
const Properties& properties,
CFWL_Widget* pOuter)
: CFWL_Widget(app, properties, pOuter) {}
CFWL_ListBox::~CFWL_ListBox() = default;
void CFWL_ListBox::Trace(cppgc::Visitor* visitor) const {
CFWL_Widget::Trace(visitor);
visitor->Trace(m_pHorzScrollBar);
visitor->Trace(m_pVertScrollBar);
}
FWL_Type CFWL_ListBox::GetClassID() const {
return FWL_Type::ListBox;
}
void CFWL_ListBox::Update() {
if (IsLocked())
return;
switch (m_Properties.m_dwStyleExts & FWL_STYLEEXT_LTB_AlignMask) {
case FWL_STYLEEXT_LTB_LeftAlign:
m_iTTOAligns = FDE_TextAlignment::kCenterLeft;
break;
case FWL_STYLEEXT_LTB_RightAlign:
m_iTTOAligns = FDE_TextAlignment::kCenterRight;
break;
case FWL_STYLEEXT_LTB_CenterAlign:
default:
m_iTTOAligns = FDE_TextAlignment::kCenter;
break;
}
m_TTOStyles.single_line_ = true;
m_fScorllBarWidth = GetScrollWidth();
CalcSize();
}
FWL_WidgetHit CFWL_ListBox::HitTest(const CFX_PointF& point) {
if (IsShowHorzScrollBar()) {
CFX_RectF rect = m_pHorzScrollBar->GetWidgetRect();
if (rect.Contains(point))
return FWL_WidgetHit::HScrollBar;
}
if (IsShowVertScrollBar()) {
CFX_RectF rect = m_pVertScrollBar->GetWidgetRect();
if (rect.Contains(point))
return FWL_WidgetHit::VScrollBar;
}
if (m_ClientRect.Contains(point))
return FWL_WidgetHit::Client;
return FWL_WidgetHit::Unknown;
}
void CFWL_ListBox::DrawWidget(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& matrix) {
if (!pGraphics)
return;
pGraphics->SaveGraphState();
if (HasBorder())
DrawBorder(pGraphics, CFWL_ThemePart::Part::kBorder, matrix);
CFX_RectF rtClip(m_ContentRect);
if (IsShowHorzScrollBar())
rtClip.height -= m_fScorllBarWidth;
if (IsShowVertScrollBar())
rtClip.width -= m_fScorllBarWidth;
pGraphics->SetClipRect(matrix.TransformRect(rtClip));
if ((m_Properties.m_dwStyles & FWL_STYLE_WGT_NoBackground) == 0)
DrawBkground(pGraphics, matrix);
DrawItems(pGraphics, matrix);
pGraphics->RestoreGraphState();
}
int32_t CFWL_ListBox::CountSelItems() {
int32_t iRet = 0;
int32_t iCount = CountItems(this);
for (int32_t i = 0; i < iCount; i++) {
Item* pItem = GetItem(this, i);
if (pItem && pItem->IsSelected())
iRet++;
}
return iRet;
}
CFWL_ListBox::Item* CFWL_ListBox::GetSelItem(int32_t nIndexSel) {
int32_t idx = GetSelIndex(nIndexSel);
if (idx < 0)
return nullptr;
return GetItem(this, idx);
}
int32_t CFWL_ListBox::GetSelIndex(int32_t nIndex) {
int32_t index = 0;
int32_t iCount = CountItems(this);
for (int32_t i = 0; i < iCount; i++) {
Item* pItem = GetItem(this, i);
if (!pItem)
return -1;
if (pItem->IsSelected()) {
if (index == nIndex)
return i;
index++;
}
}
return -1;
}
void CFWL_ListBox::SetSelItem(Item* pItem, bool bSelect) {
if (!pItem) {
if (bSelect) {
SelectAll();
} else {
ClearSelection();
SetFocusItem(nullptr);
}
return;
}
if (IsMultiSelection())
pItem->SetSelected(bSelect);
else
SetSelection(pItem, pItem, bSelect);
}
CFWL_ListBox::Item* CFWL_ListBox::GetListItem(Item* pItem,
XFA_FWL_VKEYCODE dwKeyCode) {
Item* hRet = nullptr;
switch (dwKeyCode) {
case XFA_FWL_VKEY_Up:
case XFA_FWL_VKEY_Down:
case XFA_FWL_VKEY_Home:
case XFA_FWL_VKEY_End: {
const bool bUp = dwKeyCode == XFA_FWL_VKEY_Up;
const bool bDown = dwKeyCode == XFA_FWL_VKEY_Down;
const bool bHome = dwKeyCode == XFA_FWL_VKEY_Home;
int32_t iDstItem = -1;
if (bUp || bDown) {
int32_t index = GetItemIndex(this, pItem);
iDstItem = dwKeyCode == XFA_FWL_VKEY_Up ? index - 1 : index + 1;
} else if (bHome) {
iDstItem = 0;
} else {
int32_t iCount = CountItems(this);
iDstItem = iCount - 1;
}
hRet = GetItem(this, iDstItem);
break;
}
default:
break;
}
return hRet;
}
void CFWL_ListBox::SetSelection(Item* hStart, Item* hEnd, bool bSelected) {
int32_t iStart = GetItemIndex(this, hStart);
int32_t iEnd = GetItemIndex(this, hEnd);
if (iStart > iEnd)
std::swap(iStart, iEnd);
if (bSelected) {
int32_t iCount = CountItems(this);
for (int32_t i = 0; i < iCount; i++) {
Item* pItem = GetItem(this, i);
if (pItem)
pItem->SetSelected(false);
}
}
while (iStart <= iEnd) {
Item* pItem = GetItem(this, iStart);
if (pItem)
pItem->SetSelected(bSelected);
++iStart;
}
}
bool CFWL_ListBox::IsMultiSelection() const {
return m_Properties.m_dwStyleExts & FWL_STYLEEXT_LTB_MultiSelection;
}
void CFWL_ListBox::ClearSelection() {
bool bMulti = IsMultiSelection();
int32_t iCount = CountItems(this);
for (int32_t i = 0; i < iCount; i++) {
Item* pItem = GetItem(this, i);
if (!pItem)
continue;
if (!pItem->IsSelected())
continue;
pItem->SetSelected(false);
if (!bMulti)
return;
}
}
void CFWL_ListBox::SelectAll() {
if (!IsMultiSelection())
return;
int32_t iCount = CountItems(this);
if (iCount <= 0)
return;
Item* pItemStart = GetItem(this, 0);
Item* pItemEnd = GetItem(this, iCount - 1);
SetSelection(pItemStart, pItemEnd, false);
}
CFWL_ListBox::Item* CFWL_ListBox::GetFocusedItem() {
int32_t iCount = CountItems(this);
for (int32_t i = 0; i < iCount; i++) {
Item* pItem = GetItem(this, i);
if (!pItem)
break;
if (pItem->IsFocused())
return pItem;
}
return nullptr;
}
void CFWL_ListBox::SetFocusItem(Item* pItem) {
Item* hFocus = GetFocusedItem();
if (pItem == hFocus)
return;
if (hFocus)
hFocus->SetFocused(false);
if (pItem)
pItem->SetFocused(true);
}
CFWL_ListBox::Item* CFWL_ListBox::GetItemAtPoint(const CFX_PointF& point) {
CFX_PointF pos = point - m_ContentRect.TopLeft();
float fPosX = 0.0f;
if (m_pHorzScrollBar)
fPosX = m_pHorzScrollBar->GetPos();
float fPosY = 0.0;
if (m_pVertScrollBar)
fPosY = m_pVertScrollBar->GetPos();
int32_t nCount = CountItems(this);
for (int32_t i = 0; i < nCount; i++) {
Item* pItem = GetItem(this, i);
if (!pItem)
continue;
CFX_RectF rtItem = pItem->GetRect();
rtItem.Offset(-fPosX, -fPosY);
if (rtItem.Contains(pos))
return pItem;
}
return nullptr;
}
bool CFWL_ListBox::ScrollToVisible(Item* pItem) {
if (!m_pVertScrollBar)
return false;
CFX_RectF rtItem = pItem ? pItem->GetRect() : CFX_RectF();
bool bScroll = false;
float fPosY = m_pVertScrollBar->GetPos();
rtItem.Offset(0, -fPosY + m_ContentRect.top);
if (rtItem.top < m_ContentRect.top) {
fPosY += rtItem.top - m_ContentRect.top;
bScroll = true;
} else if (rtItem.bottom() > m_ContentRect.bottom()) {
fPosY += rtItem.bottom() - m_ContentRect.bottom();
bScroll = true;
}
if (!bScroll)
return false;
m_pVertScrollBar->SetPos(fPosY);
m_pVertScrollBar->SetTrackPos(fPosY);
RepaintRect(m_ClientRect);
return true;
}
void CFWL_ListBox::DrawBkground(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& mtMatrix) {
if (!pGraphics)
return;
CFWL_ThemeBackground param(this, pGraphics);
param.m_iPart = CFWL_ThemePart::Part::kBackground;
param.m_matrix = mtMatrix;
param.m_PartRect = m_ClientRect;
if (IsShowHorzScrollBar() && IsShowVertScrollBar())
param.m_pRtData = &m_StaticRect;
if (!IsEnabled())
param.m_dwStates = CFWL_PartState::kDisabled;
GetThemeProvider()->DrawBackground(param);
}
void CFWL_ListBox::DrawItems(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& mtMatrix) {
float fPosX = 0.0f;
if (m_pHorzScrollBar)
fPosX = m_pHorzScrollBar->GetPos();
float fPosY = 0.0f;
if (m_pVertScrollBar)
fPosY = m_pVertScrollBar->GetPos();
CFX_RectF rtView(m_ContentRect);
if (m_pHorzScrollBar)
rtView.height -= m_fScorllBarWidth;
if (m_pVertScrollBar)
rtView.width -= m_fScorllBarWidth;
int32_t iCount = CountItems(this);
for (int32_t i = 0; i < iCount; i++) {
CFWL_ListBox::Item* pItem = GetItem(this, i);
if (!pItem)
continue;
CFX_RectF rtItem = pItem->GetRect();
rtItem.Offset(m_ContentRect.left - fPosX, m_ContentRect.top - fPosY);
if (rtItem.bottom() < m_ContentRect.top)
continue;
if (rtItem.top >= m_ContentRect.bottom())
break;
DrawItem(pGraphics, pItem, i, rtItem, mtMatrix);
}
}
void CFWL_ListBox::DrawItem(CFGAS_GEGraphics* pGraphics,
Item* pItem,
int32_t Index,
const CFX_RectF& rtItem,
const CFX_Matrix& mtMatrix) {
Mask<CFWL_PartState> dwPartStates = CFWL_PartState::kNormal;
if (m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)
dwPartStates = CFWL_PartState::kDisabled;
else if (pItem && pItem->IsSelected())
dwPartStates = CFWL_PartState::kSelected;
if ((m_Properties.m_dwStates & FWL_STATE_WGT_Focused) && pItem &&
pItem->IsFocused()) {
dwPartStates |= CFWL_PartState::kFocused;
}
CFX_RectF rtFocus(rtItem); // Must outlive |bg_param|.
CFWL_ThemeBackground bg_param(this, pGraphics);
bg_param.m_iPart = CFWL_ThemePart::Part::kListItem;
bg_param.m_dwStates = dwPartStates;
bg_param.m_matrix = mtMatrix;
bg_param.m_PartRect = rtItem;
bg_param.m_bMaximize = true;
bg_param.m_pRtData = &rtFocus;
if (m_pVertScrollBar && !m_pHorzScrollBar &&
(dwPartStates & CFWL_PartState::kFocused)) {
bg_param.m_PartRect.left += 1;
bg_param.m_PartRect.width -= (m_fScorllBarWidth + 1);
rtFocus.Deflate(0.5, 0.5, 1 + m_fScorllBarWidth, 1);
}
IFWL_ThemeProvider* pTheme = GetThemeProvider();
pTheme->DrawBackground(bg_param);
if (!pItem)
return;
WideString wsText = pItem->GetText();
if (wsText.GetLength() <= 0)
return;
CFX_RectF rtText(rtItem);
rtText.Deflate(kItemTextMargin, kItemTextMargin);
CFWL_ThemeText textParam(this, pGraphics);
textParam.m_iPart = CFWL_ThemePart::Part::kListItem;
textParam.m_dwStates = dwPartStates;
textParam.m_matrix = mtMatrix;
textParam.m_PartRect = rtText;
textParam.m_wsText = std::move(wsText);
textParam.m_dwTTOStyles = m_TTOStyles;
textParam.m_iTTOAlign = m_iTTOAligns;
textParam.m_bMaximize = true;
pTheme->DrawText(textParam);
}
CFX_SizeF CFWL_ListBox::CalcSize() {
m_ClientRect = GetClientRect();
m_ContentRect = m_ClientRect;
CFX_RectF rtUIMargin;
if (!GetOuter()) {
CFWL_ThemePart part(this);
CFX_RectF pUIMargin = GetThemeProvider()->GetUIMargin(part);
m_ContentRect.Deflate(pUIMargin.left, pUIMargin.top, pUIMargin.width,
pUIMargin.height);
}
float fWidth = GetMaxTextWidth();
fWidth += 2 * kItemTextMargin;
float fActualWidth = m_ClientRect.width - rtUIMargin.left - rtUIMargin.width;
fWidth = std::max(fWidth, fActualWidth);
m_fItemHeight = CalcItemHeight();
int32_t iCount = CountItems(this);
CFX_SizeF fs;
for (int32_t i = 0; i < iCount; i++) {
Item* htem = GetItem(this, i);
UpdateItemSize(htem, fs, fWidth, m_fItemHeight);
}
float iHeight = m_ClientRect.height;
bool bShowVertScr = false;
bool bShowHorzScr = false;
if (!bShowVertScr && (m_Properties.m_dwStyles & FWL_STYLE_WGT_VScroll))
bShowVertScr = (fs.height > iHeight);
float fMax = 0.0f;
if (bShowVertScr) {
if (!m_pVertScrollBar)
InitVerticalScrollBar();
CFX_RectF rtScrollBar(m_ClientRect.right() - m_fScorllBarWidth,
m_ClientRect.top, m_fScorllBarWidth,
m_ClientRect.height - 1);
if (bShowHorzScr)
rtScrollBar.height -= m_fScorllBarWidth;
m_pVertScrollBar->SetWidgetRect(rtScrollBar);
fMax = std::max(fs.height - m_ContentRect.height, m_fItemHeight);
m_pVertScrollBar->SetRange(0.0f, fMax);
m_pVertScrollBar->SetPageSize(rtScrollBar.height * 9 / 10);
m_pVertScrollBar->SetStepSize(m_fItemHeight);
float fPos = pdfium::clamp(m_pVertScrollBar->GetPos(), 0.0f, fMax);
m_pVertScrollBar->SetPos(fPos);
m_pVertScrollBar->SetTrackPos(fPos);
if ((m_Properties.m_dwStyleExts & FWL_STYLEEXT_LTB_ShowScrollBarFocus) ==
0 ||
(m_Properties.m_dwStates & FWL_STATE_WGT_Focused)) {
m_pVertScrollBar->RemoveStates(FWL_STATE_WGT_Invisible);
}
m_pVertScrollBar->Update();
} else if (m_pVertScrollBar) {
m_pVertScrollBar->SetPos(0);
m_pVertScrollBar->SetTrackPos(0);
m_pVertScrollBar->SetStates(FWL_STATE_WGT_Invisible);
}
if (bShowHorzScr) {
if (!m_pHorzScrollBar)
InitHorizontalScrollBar();
CFX_RectF rtScrollBar(m_ClientRect.left,
m_ClientRect.bottom() - m_fScorllBarWidth,
m_ClientRect.width, m_fScorllBarWidth);
if (bShowVertScr)
rtScrollBar.width -= m_fScorllBarWidth;
m_pHorzScrollBar->SetWidgetRect(rtScrollBar);
fMax = fs.width - rtScrollBar.width;
m_pHorzScrollBar->SetRange(0.0f, fMax);
m_pHorzScrollBar->SetPageSize(fWidth * 9 / 10);
m_pHorzScrollBar->SetStepSize(fWidth / 10);
float fPos = pdfium::clamp(m_pHorzScrollBar->GetPos(), 0.0f, fMax);
m_pHorzScrollBar->SetPos(fPos);
m_pHorzScrollBar->SetTrackPos(fPos);
if ((m_Properties.m_dwStyleExts & FWL_STYLEEXT_LTB_ShowScrollBarFocus) ==
0 ||
(m_Properties.m_dwStates & FWL_STATE_WGT_Focused)) {
m_pHorzScrollBar->RemoveStates(FWL_STATE_WGT_Invisible);
}
m_pHorzScrollBar->Update();
} else if (m_pHorzScrollBar) {
m_pHorzScrollBar->SetPos(0);
m_pHorzScrollBar->SetTrackPos(0);
m_pHorzScrollBar->SetStates(FWL_STATE_WGT_Invisible);
}
if (bShowVertScr && bShowHorzScr) {
m_StaticRect = CFX_RectF(m_ClientRect.right() - m_fScorllBarWidth,
m_ClientRect.bottom() - m_fScorllBarWidth,
m_fScorllBarWidth, m_fScorllBarWidth);
}
return fs;
}
void CFWL_ListBox::UpdateItemSize(Item* pItem,
CFX_SizeF& size,
float fWidth,
float fItemHeight) const {
if (pItem) {
CFX_RectF rtItem(0, size.height, fWidth, fItemHeight);
pItem->SetRect(rtItem);
}
size.width = fWidth;
size.height += fItemHeight;
}
float CFWL_ListBox::GetMaxTextWidth() {
float fRet = 0.0f;
int32_t iCount = CountItems(this);
for (int32_t i = 0; i < iCount; i++) {
Item* pItem = GetItem(this, i);
if (!pItem)
continue;
CFX_SizeF sz = CalcTextSize(pItem->GetText(), false);
fRet = std::max(fRet, sz.width);
}
return fRet;
}
float CFWL_ListBox::GetScrollWidth() {
return GetThemeProvider()->GetScrollBarWidth();
}
float CFWL_ListBox::CalcItemHeight() {
CFWL_ThemePart part(this);
return GetThemeProvider()->GetFontSize(part) + 2 * kItemTextMargin;
}
void CFWL_ListBox::InitVerticalScrollBar() {
if (m_pVertScrollBar)
return;
m_pVertScrollBar = cppgc::MakeGarbageCollected<CFWL_ScrollBar>(
GetFWLApp()->GetHeap()->GetAllocationHandle(), GetFWLApp(),
Properties{0, FWL_STYLEEXT_SCB_Vert, FWL_STATE_WGT_Invisible}, this);
}
void CFWL_ListBox::InitHorizontalScrollBar() {
if (m_pHorzScrollBar)
return;
m_pHorzScrollBar = cppgc::MakeGarbageCollected<CFWL_ScrollBar>(
GetFWLApp()->GetHeap()->GetAllocationHandle(), GetFWLApp(),
Properties{0, FWL_STYLEEXT_SCB_Horz, FWL_STATE_WGT_Invisible}, this);
}
bool CFWL_ListBox::IsShowVertScrollBar() const {
return m_pVertScrollBar && m_pVertScrollBar->IsVisible() &&
ScrollBarPropertiesPresent();
}
bool CFWL_ListBox::IsShowHorzScrollBar() const {
return m_pHorzScrollBar && m_pHorzScrollBar->IsVisible() &&
ScrollBarPropertiesPresent();
}
bool CFWL_ListBox::ScrollBarPropertiesPresent() const {
return !(m_Properties.m_dwStyleExts & FWL_STYLEEXT_LTB_ShowScrollBarFocus) ||
(m_Properties.m_dwStates & FWL_STATE_WGT_Focused);
}
void CFWL_ListBox::OnProcessMessage(CFWL_Message* pMessage) {
if (!IsEnabled())
return;
switch (pMessage->GetType()) {
case CFWL_Message::Type::kSetFocus:
OnFocusGained();
break;
case CFWL_Message::Type::kKillFocus:
OnFocusLost();
break;
case CFWL_Message::Type::kMouse: {
CFWL_MessageMouse* pMsg = static_cast<CFWL_MessageMouse*>(pMessage);
switch (pMsg->m_dwCmd) {
case CFWL_MessageMouse::MouseCommand::kLeftButtonDown:
OnLButtonDown(pMsg);
break;
case CFWL_MessageMouse::MouseCommand::kLeftButtonUp:
OnLButtonUp(pMsg);
break;
default:
break;
}
break;
}
case CFWL_Message::Type::kMouseWheel:
OnMouseWheel(static_cast<CFWL_MessageMouseWheel*>(pMessage));
break;
case CFWL_Message::Type::kKey: {
CFWL_MessageKey* pMsg = static_cast<CFWL_MessageKey*>(pMessage);
if (pMsg->m_dwCmd == CFWL_MessageKey::KeyCommand::kKeyDown)
OnKeyDown(pMsg);
break;
}
default:
break;
}
// Dst target could be |this|, continue only if not destroyed by above.
if (pMessage->GetDstTarget())
CFWL_Widget::OnProcessMessage(pMessage);
}
void CFWL_ListBox::OnProcessEvent(CFWL_Event* pEvent) {
if (!pEvent)
return;
if (pEvent->GetType() != CFWL_Event::Type::Scroll)
return;
CFWL_Widget* pSrcTarget = pEvent->GetSrcTarget();
if ((pSrcTarget == m_pVertScrollBar && m_pVertScrollBar) ||
(pSrcTarget == m_pHorzScrollBar && m_pHorzScrollBar)) {
CFWL_EventScroll* pScrollEvent = static_cast<CFWL_EventScroll*>(pEvent);
OnScroll(static_cast<CFWL_ScrollBar*>(pSrcTarget),
pScrollEvent->GetScrollCode(), pScrollEvent->GetPos());
}
}
void CFWL_ListBox::OnDrawWidget(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& matrix) {
DrawWidget(pGraphics, matrix);
}
void CFWL_ListBox::OnFocusGained() {
if (GetStyleExts() & FWL_STYLEEXT_LTB_ShowScrollBarFocus) {
if (m_pVertScrollBar)
m_pVertScrollBar->RemoveStates(FWL_STATE_WGT_Invisible);
if (m_pHorzScrollBar)
m_pHorzScrollBar->RemoveStates(FWL_STATE_WGT_Invisible);
}
m_Properties.m_dwStates |= FWL_STATE_WGT_Focused;
RepaintRect(m_ClientRect);
}
void CFWL_ListBox::OnFocusLost() {
if (GetStyleExts() & FWL_STYLEEXT_LTB_ShowScrollBarFocus) {
if (m_pVertScrollBar)
m_pVertScrollBar->SetStates(FWL_STATE_WGT_Invisible);
if (m_pHorzScrollBar)
m_pHorzScrollBar->SetStates(FWL_STATE_WGT_Invisible);
}
m_Properties.m_dwStates &= ~FWL_STATE_WGT_Focused;
RepaintRect(m_ClientRect);
}
void CFWL_ListBox::OnLButtonDown(CFWL_MessageMouse* pMsg) {
m_bLButtonDown = true;
Item* pItem = GetItemAtPoint(pMsg->m_pos);
if (!pItem)
return;
if (IsMultiSelection()) {
if (pMsg->m_dwFlags & XFA_FWL_KeyFlag::kCtrl) {
pItem->SetSelected(!pItem->IsSelected());
m_hAnchor = pItem;
} else if (pMsg->m_dwFlags & XFA_FWL_KeyFlag::kShift) {
if (m_hAnchor)
SetSelection(m_hAnchor, pItem, true);
else
pItem->SetSelected(true);
} else {
SetSelection(pItem, pItem, true);
m_hAnchor = pItem;
}
} else {
SetSelection(pItem, pItem, true);
}
SetFocusItem(pItem);
ScrollToVisible(pItem);
SetGrab(true);
RepaintRect(m_ClientRect);
}
void CFWL_ListBox::OnLButtonUp(CFWL_MessageMouse* pMsg) {
if (!m_bLButtonDown)
return;
m_bLButtonDown = false;
SetGrab(false);
}
void CFWL_ListBox::OnMouseWheel(CFWL_MessageMouseWheel* pMsg) {
if (IsShowVertScrollBar())
m_pVertScrollBar->GetDelegate()->OnProcessMessage(pMsg);
}
void CFWL_ListBox::OnKeyDown(CFWL_MessageKey* pMsg) {
auto dwKeyCode = static_cast<XFA_FWL_VKEYCODE>(pMsg->m_dwKeyCodeOrChar);
switch (dwKeyCode) {
case XFA_FWL_VKEY_Tab:
case XFA_FWL_VKEY_Up:
case XFA_FWL_VKEY_Down:
case XFA_FWL_VKEY_Home:
case XFA_FWL_VKEY_End: {
Item* pItem = GetListItem(GetFocusedItem(), dwKeyCode);
bool bShift = !!(pMsg->m_dwFlags & XFA_FWL_KeyFlag::kShift);
bool bCtrl = !!(pMsg->m_dwFlags & XFA_FWL_KeyFlag::kCtrl);
OnVK(pItem, bShift, bCtrl);
break;
}
default:
break;
}
}
void CFWL_ListBox::OnVK(Item* pItem, bool bShift, bool bCtrl) {
if (!pItem)
return;
if (IsMultiSelection()) {
if (bCtrl) {
// Do nothing.
} else if (bShift) {
if (m_hAnchor)
SetSelection(m_hAnchor, pItem, true);
else
pItem->SetSelected(true);
} else {
SetSelection(pItem, pItem, true);
m_hAnchor = pItem;
}
} else {
SetSelection(pItem, pItem, true);
}
SetFocusItem(pItem);
ScrollToVisible(pItem);
RepaintRect(CFX_RectF(0, 0, m_WidgetRect.width, m_WidgetRect.height));
}
bool CFWL_ListBox::OnScroll(CFWL_ScrollBar* pScrollBar,
CFWL_EventScroll::Code dwCode,
float fPos) {
float fMin;
float fMax;
pScrollBar->GetRange(&fMin, &fMax);
float iCurPos = pScrollBar->GetPos();
float fStep = pScrollBar->GetStepSize();
switch (dwCode) {
case CFWL_EventScroll::Code::Min: {
fPos = fMin;
break;
}
case CFWL_EventScroll::Code::Max: {
fPos = fMax;
break;
}
case CFWL_EventScroll::Code::StepBackward: {
fPos -= fStep;
if (fPos < fMin + fStep / 2)
fPos = fMin;
break;
}
case CFWL_EventScroll::Code::StepForward: {
fPos += fStep;
if (fPos > fMax - fStep / 2)
fPos = fMax;
break;
}
case CFWL_EventScroll::Code::PageBackward: {
fPos -= pScrollBar->GetPageSize();
if (fPos < fMin)
fPos = fMin;
break;
}
case CFWL_EventScroll::Code::PageForward: {
fPos += pScrollBar->GetPageSize();
if (fPos > fMax)
fPos = fMax;
break;
}
case CFWL_EventScroll::Code::Pos:
case CFWL_EventScroll::Code::TrackPos:
case CFWL_EventScroll::Code::None:
break;
case CFWL_EventScroll::Code::EndScroll:
return false;
}
if (iCurPos != fPos) {
pScrollBar->SetPos(fPos);
pScrollBar->SetTrackPos(fPos);
RepaintRect(m_ClientRect);
}
return true;
}
int32_t CFWL_ListBox::CountItems(const CFWL_Widget* pWidget) const {
return fxcrt::CollectionSize<int32_t>(m_ItemArray);
}
CFWL_ListBox::Item* CFWL_ListBox::GetItem(const CFWL_Widget* pWidget,
int32_t nIndex) const {
if (nIndex < 0 || nIndex >= CountItems(pWidget))
return nullptr;
return m_ItemArray[nIndex].get();
}
int32_t CFWL_ListBox::GetItemIndex(CFWL_Widget* pWidget, Item* pItem) {
auto it = std::find_if(m_ItemArray.begin(), m_ItemArray.end(),
[pItem](const std::unique_ptr<Item>& candidate) {
return candidate.get() == pItem;
});
return it != m_ItemArray.end()
? pdfium::base::checked_cast<int32_t>(it - m_ItemArray.begin())
: -1;
}
CFWL_ListBox::Item* CFWL_ListBox::AddString(const WideString& wsAdd) {
m_ItemArray.push_back(std::make_unique<Item>(wsAdd));
return m_ItemArray.back().get();
}
void CFWL_ListBox::RemoveAt(int32_t iIndex) {
if (iIndex < 0 || static_cast<size_t>(iIndex) >= m_ItemArray.size())
return;
m_ItemArray.erase(m_ItemArray.begin() + iIndex);
}
void CFWL_ListBox::DeleteString(Item* pItem) {
int32_t nIndex = GetItemIndex(this, pItem);
if (nIndex < 0 || static_cast<size_t>(nIndex) >= m_ItemArray.size())
return;
int32_t iSel = nIndex + 1;
if (iSel >= CountItems(this))
iSel = nIndex - 1;
if (iSel >= 0) {
Item* item = GetItem(this, iSel);
if (item)
item->SetSelected(true);
}
m_ItemArray.erase(m_ItemArray.begin() + nIndex);
}
void CFWL_ListBox::DeleteAll() {
m_ItemArray.clear();
}
CFWL_ListBox::Item::Item(const WideString& text) : m_wsText(text) {}
CFWL_ListBox::Item::~Item() = default;