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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 "fpdfsdk/pwl/cpwl_edit.h"
#include <algorithm>
#include <memory>
#include <sstream>
#include <utility>
#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfdoc/cpvt_word.h"
#include "core/fpdfdoc/ipvt_fontmap.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxge/cfx_fillrenderoptions.h"
#include "core/fxge/cfx_graphstatedata.h"
#include "core/fxge/cfx_pathdata.h"
#include "core/fxge/cfx_renderdevice.h"
#include "core/fxge/fx_font.h"
#include "fpdfsdk/pwl/cpwl_caret.h"
#include "fpdfsdk/pwl/cpwl_edit_ctrl.h"
#include "fpdfsdk/pwl/cpwl_edit_impl.h"
#include "fpdfsdk/pwl/cpwl_scroll_bar.h"
#include "fpdfsdk/pwl/cpwl_wnd.h"
#include "fpdfsdk/pwl/ipwl_fillernotify.h"
#include "public/fpdf_fwlevent.h"
#include "third_party/base/check.h"
CPWL_Edit::CPWL_Edit(
const CreateParams& cp,
std::unique_ptr<IPWL_SystemHandler::PerWindowData> pAttachedData)
: CPWL_EditCtrl(cp, std::move(pAttachedData)) {}
CPWL_Edit::~CPWL_Edit() {
DCHECK(!m_bFocus);
}
void CPWL_Edit::SetText(const WideString& csText) {
m_pEdit->SetText(csText);
}
bool CPWL_Edit::RePosChildWnd() {
if (CPWL_ScrollBar* pVSB = GetVScrollBar()) {
CFX_FloatRect rcWindow = m_rcOldWindow;
CFX_FloatRect rcVScroll =
CFX_FloatRect(rcWindow.right, rcWindow.bottom,
rcWindow.right + PWL_SCROLLBAR_WIDTH, rcWindow.top);
ObservedPtr<CPWL_Edit> thisObserved(this);
pVSB->Move(rcVScroll, true, false);
if (!thisObserved)
return false;
}
if (m_pEditCaret && !HasFlag(PES_TEXTOVERFLOW)) {
CFX_FloatRect rect = GetClientRect();
if (!rect.IsEmpty()) {
// +1 for caret beside border
rect.Inflate(1.0f, 1.0f);
rect.Normalize();
}
m_pEditCaret->SetClipRect(rect);
}
return CPWL_EditCtrl::RePosChildWnd();
}
CFX_FloatRect CPWL_Edit::GetClientRect() const {
float width = static_cast<float>(GetBorderWidth() + GetInnerBorderWidth());
CFX_FloatRect rcClient = GetWindowRect().GetDeflated(width, width);
if (CPWL_ScrollBar* pVSB = GetVScrollBar()) {
if (pVSB->IsVisible()) {
rcClient.right -= PWL_SCROLLBAR_WIDTH;
}
}
return rcClient;
}
void CPWL_Edit::SetAlignFormatVerticalCenter() {
m_pEdit->SetAlignmentV(static_cast<int32_t>(PEAV_CENTER), true);
}
bool CPWL_Edit::CanSelectAll() const {
return GetSelectWordRange() != m_pEdit->GetWholeWordRange();
}
bool CPWL_Edit::CanCopy() const {
return !HasFlag(PES_PASSWORD) && !HasFlag(PES_NOREAD) &&
m_pEdit->IsSelected();
}
bool CPWL_Edit::CanCut() const {
return CanCopy() && !IsReadOnly();
}
void CPWL_Edit::CutText() {
if (!CanCut())
return;
m_pEdit->ClearSelection();
}
void CPWL_Edit::OnCreated() {
CPWL_EditCtrl::OnCreated();
if (CPWL_ScrollBar* pScroll = GetVScrollBar()) {
pScroll->RemoveFlag(PWS_AUTOTRANSPARENT);
pScroll->SetTransparency(255);
}
SetParamByFlag();
m_rcOldWindow = GetWindowRect();
m_pEdit->SetOperationNotify(this);
}
void CPWL_Edit::SetParamByFlag() {
if (HasFlag(PES_RIGHT)) {
m_pEdit->SetAlignmentH(2, false);
} else if (HasFlag(PES_MIDDLE)) {
m_pEdit->SetAlignmentH(1, false);
} else {
m_pEdit->SetAlignmentH(0, false);
}
if (HasFlag(PES_BOTTOM)) {
m_pEdit->SetAlignmentV(2, false);
} else if (HasFlag(PES_CENTER)) {
m_pEdit->SetAlignmentV(1, false);
} else {
m_pEdit->SetAlignmentV(0, false);
}
if (HasFlag(PES_PASSWORD)) {
m_pEdit->SetPasswordChar('*', false);
}
m_pEdit->SetMultiLine(HasFlag(PES_MULTILINE), false);
m_pEdit->SetAutoReturn(HasFlag(PES_AUTORETURN), false);
m_pEdit->SetAutoFontSize(HasFlag(PWS_AUTOFONTSIZE), false);
m_pEdit->SetAutoScroll(HasFlag(PES_AUTOSCROLL), false);
m_pEdit->EnableUndo(HasFlag(PES_UNDO));
if (HasFlag(PES_TEXTOVERFLOW)) {
SetClipRect(CFX_FloatRect());
m_pEdit->SetTextOverflow(true, false);
} else {
if (m_pEditCaret) {
CFX_FloatRect rect = GetClientRect();
if (!rect.IsEmpty()) {
// +1 for caret beside border
rect.Inflate(1.0f, 1.0f);
rect.Normalize();
}
m_pEditCaret->SetClipRect(rect);
}
}
}
void CPWL_Edit::DrawThisAppearance(CFX_RenderDevice* pDevice,
const CFX_Matrix& mtUser2Device) {
CPWL_Wnd::DrawThisAppearance(pDevice, mtUser2Device);
const CFX_FloatRect rcClient = GetClientRect();
const BorderStyle border_style = GetBorderStyle();
const int32_t nCharArray = m_pEdit->GetCharArray();
bool draw_border = nCharArray > 0 && (border_style == BorderStyle::kSolid ||
border_style == BorderStyle::kDash);
if (draw_border) {
FX_SAFE_INT32 nCharArraySafe = nCharArray;
nCharArraySafe -= 1;
nCharArraySafe *= 2;
draw_border = nCharArraySafe.IsValid();
}
if (draw_border) {
CFX_GraphStateData gsd;
gsd.m_LineWidth = GetBorderWidth();
if (border_style == BorderStyle::kDash) {
gsd.m_DashArray = {static_cast<float>(GetBorderDash().nDash),
static_cast<float>(GetBorderDash().nGap)};
gsd.m_DashPhase = GetBorderDash().nPhase;
}
const float width = (rcClient.right - rcClient.left) / nCharArray;
CFX_PathData path;
CFX_PointF bottom(0, rcClient.bottom);
CFX_PointF top(0, rcClient.top);
for (int32_t i = 0; i < nCharArray - 1; ++i) {
bottom.x = rcClient.left + width * (i + 1);
top.x = bottom.x;
path.AppendPoint(bottom, FXPT_TYPE::MoveTo);
path.AppendPoint(top, FXPT_TYPE::LineTo);
}
if (!path.GetPoints().empty()) {
pDevice->DrawPath(&path, &mtUser2Device, &gsd, 0,
GetBorderColor().ToFXColor(255),
CFX_FillRenderOptions::EvenOddOptions());
}
}
CFX_FloatRect rcClip;
CPVT_WordRange wrRange = m_pEdit->GetVisibleWordRange();
CPVT_WordRange* pRange = nullptr;
if (!HasFlag(PES_TEXTOVERFLOW)) {
rcClip = GetClientRect();
pRange = &wrRange;
}
CPWL_EditImpl::DrawEdit(pDevice, mtUser2Device, m_pEdit.get(),
GetTextColor().ToFXColor(GetTransparency()), rcClip,
CFX_PointF(), pRange, GetSystemHandler(),
m_pFormFiller.Get());
}
bool CPWL_Edit::OnLButtonDown(uint32_t nFlag, const CFX_PointF& point) {
CPWL_Wnd::OnLButtonDown(nFlag, point);
if (HasFlag(PES_TEXTOVERFLOW) || ClientHitTest(point)) {
if (m_bMouseDown && !InvalidateRect(nullptr))
return true;
m_bMouseDown = true;
SetCapture();
m_pEdit->OnMouseDown(point, IsSHIFTpressed(nFlag), IsCTRLpressed(nFlag));
}
return true;
}
bool CPWL_Edit::OnLButtonDblClk(uint32_t nFlag, const CFX_PointF& point) {
CPWL_Wnd::OnLButtonDblClk(nFlag, point);
if (HasFlag(PES_TEXTOVERFLOW) || ClientHitTest(point)) {
m_pEdit->SelectAll();
}
return true;
}
bool CPWL_Edit::OnRButtonUp(uint32_t nFlag, const CFX_PointF& point) {
if (m_bMouseDown)
return false;
CPWL_Wnd::OnRButtonUp(nFlag, point);
if (!HasFlag(PES_TEXTOVERFLOW) && !ClientHitTest(point))
return true;
SetFocus();
return false;
}
void CPWL_Edit::OnSetFocus() {
ObservedPtr<CPWL_Edit> observed_ptr(this);
SetEditCaret(true);
if (!observed_ptr)
return;
if (!IsReadOnly()) {
if (CPWL_Wnd::FocusHandlerIface* pFocusHandler = GetFocusHandler()) {
pFocusHandler->OnSetFocus(this);
if (!observed_ptr)
return;
}
}
m_bFocus = true;
}
void CPWL_Edit::OnKillFocus() {
ObservedPtr<CPWL_Edit> observed_ptr(this);
CPWL_ScrollBar* pScroll = GetVScrollBar();
if (pScroll && pScroll->IsVisible()) {
pScroll->SetVisible(false);
if (!observed_ptr)
return;
if (!Move(m_rcOldWindow, true, true))
return;
}
m_pEdit->SelectNone();
if (!observed_ptr)
return;
if (!SetCaret(false, CFX_PointF(), CFX_PointF()))
return;
SetCharSet(FX_CHARSET_ANSI);
m_bFocus = false;
}
void CPWL_Edit::SetCharSpace(float fCharSpace) {
m_pEdit->SetCharSpace(fCharSpace);
}
CPVT_WordRange CPWL_Edit::GetSelectWordRange() const {
if (!m_pEdit->IsSelected())
return CPVT_WordRange();
int32_t nStart;
int32_t nEnd;
std::tie(nStart, nEnd) = m_pEdit->GetSelection();
CPVT_WordPlace wpStart = m_pEdit->WordIndexToWordPlace(nStart);
CPVT_WordPlace wpEnd = m_pEdit->WordIndexToWordPlace(nEnd);
return CPVT_WordRange(wpStart, wpEnd);
}
CFX_PointF CPWL_Edit::GetWordRightBottomPoint(const CPVT_WordPlace& wpWord) {
CPWL_EditImpl_Iterator* pIterator = m_pEdit->GetIterator();
CPVT_WordPlace wpOld = pIterator->GetAt();
pIterator->SetAt(wpWord);
CFX_PointF pt;
CPVT_Word word;
if (pIterator->GetWord(word))
pt = CFX_PointF(word.ptWord.x + word.fWidth, word.ptWord.y + word.fDescent);
pIterator->SetAt(wpOld);
return pt;
}
bool CPWL_Edit::IsTextFull() const {
return m_pEdit->IsTextFull();
}
float CPWL_Edit::GetCharArrayAutoFontSize(const CPDF_Font* pFont,
const CFX_FloatRect& rcPlate,
int32_t nCharArray) {
if (!pFont || pFont->IsStandardFont())
return 0.0f;
const FX_RECT& rcBBox = pFont->GetFontBBox();
CFX_FloatRect rcCell = rcPlate;
float xdiv = rcCell.Width() / nCharArray * 1000.0f / rcBBox.Width();
float ydiv = -rcCell.Height() * 1000.0f / rcBBox.Height();
return xdiv < ydiv ? xdiv : ydiv;
}
void CPWL_Edit::SetCharArray(int32_t nCharArray) {
if (!HasFlag(PES_CHARARRAY) || nCharArray <= 0)
return;
m_pEdit->SetCharArray(nCharArray);
m_pEdit->SetTextOverflow(true, true);
if (!HasFlag(PWS_AUTOFONTSIZE))
return;
IPVT_FontMap* pFontMap = GetFontMap();
if (!pFontMap)
return;
float fFontSize = GetCharArrayAutoFontSize(pFontMap->GetPDFFont(0).Get(),
GetClientRect(), nCharArray);
if (fFontSize <= 0.0f)
return;
m_pEdit->SetAutoFontSize(false, true);
m_pEdit->SetFontSize(fFontSize);
}
void CPWL_Edit::SetLimitChar(int32_t nLimitChar) {
m_pEdit->SetLimitChar(nLimitChar);
}
CFX_FloatRect CPWL_Edit::GetFocusRect() const {
return CFX_FloatRect();
}
bool CPWL_Edit::IsVScrollBarVisible() const {
CPWL_ScrollBar* pScroll = GetVScrollBar();
return pScroll && pScroll->IsVisible();
}
bool CPWL_Edit::OnKeyDown(uint16_t nChar, uint32_t nFlag) {
if (m_bMouseDown)
return true;
if (nChar == FWL_VKEY_Delete) {
if (m_pFillerNotify) {
WideString strChange;
WideString strChangeEx;
int nSelStart;
int nSelEnd;
std::tie(nSelStart, nSelEnd) = GetSelection();
if (nSelStart == nSelEnd)
nSelEnd = nSelStart + 1;
ObservedPtr<CPWL_Wnd> thisObserved(this);
bool bRC;
bool bExit;
std::tie(bRC, bExit) = m_pFillerNotify->OnBeforeKeyStroke(
GetAttachedData(), strChange, strChangeEx, nSelStart, nSelEnd, true,
nFlag);
if (!thisObserved)
return false;
if (!bRC)
return false;
if (bExit)
return false;
}
}
bool bRet = CPWL_EditCtrl::OnKeyDown(nChar, nFlag);
// In case of implementation swallow the OnKeyDown event.
if (IsProceedtoOnChar(nChar, nFlag))
return true;
return bRet;
}
// static
bool CPWL_Edit::IsProceedtoOnChar(uint16_t nKeyCode, uint32_t nFlag) {
bool bCtrl = IsCTRLpressed(nFlag);
bool bAlt = IsALTpressed(nFlag);
if (bCtrl && !bAlt) {
// hot keys for edit control.
switch (nKeyCode) {
case 'C':
case 'V':
case 'X':
case 'A':
case 'Z':
return true;
default:
break;
}
}
// control characters.
switch (nKeyCode) {
case FWL_VKEY_Escape:
case FWL_VKEY_Back:
case FWL_VKEY_Return:
case FWL_VKEY_Space:
return true;
default:
return false;
}
}
bool CPWL_Edit::OnChar(uint16_t nChar, uint32_t nFlag) {
if (m_bMouseDown)
return true;
bool bRC = true;
bool bExit = false;
if (!IsCTRLpressed(nFlag)) {
if (m_pFillerNotify) {
WideString swChange;
int nSelStart;
int nSelEnd;
std::tie(nSelStart, nSelEnd) = GetSelection();
switch (nChar) {
case FWL_VKEY_Back:
if (nSelStart == nSelEnd)
nSelStart = nSelEnd - 1;
break;
case FWL_VKEY_Return:
break;
default:
swChange += nChar;
break;
}
ObservedPtr<CPWL_Wnd> thisObserved(this);
WideString strChangeEx;
std::tie(bRC, bExit) = m_pFillerNotify->OnBeforeKeyStroke(
GetAttachedData(), swChange, strChangeEx, nSelStart, nSelEnd, true,
nFlag);
if (!thisObserved)
return false;
}
}
if (!bRC)
return true;
if (bExit)
return false;
if (IPVT_FontMap* pFontMap = GetFontMap()) {
int32_t nOldCharSet = GetCharSet();
int32_t nNewCharSet =
pFontMap->CharSetFromUnicode(nChar, FX_CHARSET_Default);
if (nOldCharSet != nNewCharSet) {
SetCharSet(nNewCharSet);
}
}
return CPWL_EditCtrl::OnChar(nChar, nFlag);
}
bool CPWL_Edit::OnMouseWheel(uint32_t nFlag,
const CFX_PointF& point,
const CFX_Vector& delta) {
if (!HasFlag(PES_MULTILINE))
return false;
CFX_PointF ptScroll = GetScrollPos();
if (delta.y > 0)
ptScroll.y += GetFontSize();
else
ptScroll.y -= GetFontSize();
SetScrollPos(ptScroll);
return true;
}
void CPWL_Edit::OnInsertReturn(const CPVT_WordPlace& place,
const CPVT_WordPlace& oldplace) {
if (HasFlag(PES_SPELLCHECK)) {
m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
GetLatinWordsRange(place)));
}
}
void CPWL_Edit::OnBackSpace(const CPVT_WordPlace& place,
const CPVT_WordPlace& oldplace) {
if (HasFlag(PES_SPELLCHECK)) {
m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
GetLatinWordsRange(place)));
}
}
void CPWL_Edit::OnDelete(const CPVT_WordPlace& place,
const CPVT_WordPlace& oldplace) {
if (HasFlag(PES_SPELLCHECK)) {
m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
GetLatinWordsRange(place)));
}
}
void CPWL_Edit::OnClear(const CPVT_WordPlace& place,
const CPVT_WordPlace& oldplace) {
if (HasFlag(PES_SPELLCHECK)) {
m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
GetLatinWordsRange(place)));
}
}
void CPWL_Edit::OnInsertWord(const CPVT_WordPlace& place,
const CPVT_WordPlace& oldplace) {
if (HasFlag(PES_SPELLCHECK)) {
m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
GetLatinWordsRange(place)));
}
}
void CPWL_Edit::OnInsertText(const CPVT_WordPlace& place,
const CPVT_WordPlace& oldplace) {
if (HasFlag(PES_SPELLCHECK)) {
m_pEdit->RefreshWordRange(CombineWordRange(GetLatinWordsRange(oldplace),
GetLatinWordsRange(place)));
}
}
CPVT_WordRange CPWL_Edit::CombineWordRange(const CPVT_WordRange& wr1,
const CPVT_WordRange& wr2) {
return CPVT_WordRange(std::min(wr1.BeginPos, wr2.BeginPos),
std::max(wr1.EndPos, wr2.EndPos));
}
CPVT_WordRange CPWL_Edit::GetLatinWordsRange(const CFX_PointF& point) const {
return GetSameWordsRange(m_pEdit->SearchWordPlace(point), true, false);
}
CPVT_WordRange CPWL_Edit::GetLatinWordsRange(
const CPVT_WordPlace& place) const {
return GetSameWordsRange(place, true, false);
}
#define PWL_ISARABICWORD(word) \
((word >= 0x0600 && word <= 0x06FF) || (word >= 0xFB50 && word <= 0xFEFC))
CPVT_WordRange CPWL_Edit::GetSameWordsRange(const CPVT_WordPlace& place,
bool bLatin,
bool bArabic) const {
CPWL_EditImpl_Iterator* pIterator = m_pEdit->GetIterator();
CPVT_Word wordinfo;
CPVT_WordPlace wpStart(place), wpEnd(place);
pIterator->SetAt(place);
if (bLatin) {
while (pIterator->NextWord()) {
if (!pIterator->GetWord(wordinfo) ||
!FX_EDIT_ISLATINWORD(wordinfo.Word)) {
break;
}
wpEnd = pIterator->GetAt();
}
} else if (bArabic) {
while (pIterator->NextWord()) {
if (!pIterator->GetWord(wordinfo) || !PWL_ISARABICWORD(wordinfo.Word))
break;
wpEnd = pIterator->GetAt();
}
}
pIterator->SetAt(place);
if (bLatin) {
do {
if (!pIterator->GetWord(wordinfo) ||
!FX_EDIT_ISLATINWORD(wordinfo.Word)) {
break;
}
wpStart = pIterator->GetAt();
} while (pIterator->PrevWord());
} else if (bArabic) {
do {
if (!pIterator->GetWord(wordinfo) || !PWL_ISARABICWORD(wordinfo.Word))
break;
wpStart = pIterator->GetAt();
} while (pIterator->PrevWord());
}
return CPVT_WordRange(wpStart, wpEnd);
}