werunplugged/unplugged-system
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
06ee9615ad
unplugged-system/external/pdfium/xfa/fwl/cfwl_edit.cpp

1119 lines
33 KiB
C++
Raw Blame History

// 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 "xfa/fwl/cfwl_edit.h"
#include <algorithm>
#include <memory>
#include <utility>
#include <vector>
#include "build/build_config.h"
#include "core/fxge/cfx_renderdevice.h"
#include "core/fxge/text_char_pos.h"
#include "third_party/base/check.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/font/cfgas_gefont.h"
#include "xfa/fgas/graphics/cfgas_gegraphics.h"
#include "xfa/fgas/graphics/cfgas_gepath.h"
#include "xfa/fwl/cfwl_app.h"
#include "xfa/fwl/cfwl_caret.h"
#include "xfa/fwl/cfwl_event.h"
#include "xfa/fwl/cfwl_eventtextwillchange.h"
#include "xfa/fwl/cfwl_eventvalidate.h"
#include "xfa/fwl/cfwl_messagekey.h"
#include "xfa/fwl/cfwl_messagemouse.h"
#include "xfa/fwl/cfwl_themebackground.h"
#include "xfa/fwl/cfwl_themepart.h"
#include "xfa/fwl/cfwl_widgetmgr.h"
#include "xfa/fwl/fwl_widgetdef.h"
#include "xfa/fwl/ifwl_themeprovider.h"
#include "xfa/fwl/theme/cfwl_utils.h"
namespace {
constexpr int kEditMargin = 3;
#if BUILDFLAG(IS_APPLE)
constexpr XFA_FWL_KeyFlag kEditingModifier = XFA_FWL_KeyFlag::kCommand;
#else
constexpr XFA_FWL_KeyFlag kEditingModifier = XFA_FWL_KeyFlag::kCtrl;
#endif
} // namespace
CFWL_Edit::CFWL_Edit(CFWL_App* app,
const Properties& properties,
CFWL_Widget* pOuter)
: CFWL_Widget(app, properties, pOuter),
m_pEditEngine(std::make_unique<CFDE_TextEditEngine>()) {
m_pEditEngine->SetDelegate(this);
}
CFWL_Edit::~CFWL_Edit() = default;
void CFWL_Edit::PreFinalize() {
m_pEditEngine->SetDelegate(nullptr);
if (m_Properties.m_dwStates & FWL_STATE_WGT_Focused)
HideCaret(nullptr);
CFWL_Widget::PreFinalize();
}
void CFWL_Edit::Trace(cppgc::Visitor* visitor) const {
CFWL_Widget::Trace(visitor);
visitor->Trace(m_pVertScrollBar);
visitor->Trace(m_pCaret);
}
FWL_Type CFWL_Edit::GetClassID() const {
return FWL_Type::Edit;
}
CFX_RectF CFWL_Edit::GetWidgetRect() {
CFX_RectF rect = m_WidgetRect;
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_OuterScrollbar) {
float scrollbarWidth = GetThemeProvider()->GetScrollBarWidth();
if (IsShowVertScrollBar()) {
rect.width += scrollbarWidth;
rect.width += kEditMargin;
}
}
return rect;
}
CFX_RectF CFWL_Edit::GetAutosizedWidgetRect() {
CFX_RectF rect;
if (m_pEditEngine->GetLength() > 0) {
CFX_SizeF size = CalcTextSize(
m_pEditEngine->GetText(),
!!(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_MultiLine));
rect = CFX_RectF(0, 0, size);
}
InflateWidgetRect(rect);
return rect;
}
void CFWL_Edit::SetStates(uint32_t dwStates) {
if ((m_Properties.m_dwStates & FWL_STATE_WGT_Invisible) ||
(m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)) {
HideCaret(nullptr);
}
CFWL_Widget::SetStates(dwStates);
}
void CFWL_Edit::Update() {
if (IsLocked())
return;
Layout();
if (m_ClientRect.IsEmpty())
return;
UpdateEditEngine();
UpdateVAlignment();
UpdateScroll();
InitCaret();
}
FWL_WidgetHit CFWL_Edit::HitTest(const CFX_PointF& point) {
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_OuterScrollbar) {
if (IsShowVertScrollBar()) {
if (m_pVertScrollBar->GetWidgetRect().Contains(point))
return FWL_WidgetHit::VScrollBar;
}
}
if (m_ClientRect.Contains(point))
return FWL_WidgetHit::Edit;
return FWL_WidgetHit::Unknown;
}
void CFWL_Edit::DrawWidget(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& matrix) {
if (!pGraphics)
return;
if (m_ClientRect.IsEmpty())
return;
DrawContent(pGraphics, matrix);
if (HasBorder())
DrawBorder(pGraphics, CFWL_ThemePart::Part::kBorder, matrix);
}
void CFWL_Edit::SetText(const WideString& wsText) {
m_pEditEngine->Clear();
m_pEditEngine->Insert(0, wsText,
CFDE_TextEditEngine::RecordOperation::kInsertRecord);
}
void CFWL_Edit::SetTextSkipNotify(const WideString& wsText) {
m_pEditEngine->Clear();
m_pEditEngine->Insert(0, wsText,
CFDE_TextEditEngine::RecordOperation::kSkipNotify);
}
size_t CFWL_Edit::GetTextLength() const {
return m_pEditEngine->GetLength();
}
WideString CFWL_Edit::GetText() const {
return m_pEditEngine->GetText();
}
void CFWL_Edit::ClearText() {
m_pEditEngine->Clear();
}
void CFWL_Edit::SelectAll() {
m_pEditEngine->SelectAll();
}
bool CFWL_Edit::HasSelection() const {
return m_pEditEngine->HasSelection();
}
std::pair<size_t, size_t> CFWL_Edit::GetSelection() const {
return m_pEditEngine->GetSelection();
}
void CFWL_Edit::ClearSelection() {
return m_pEditEngine->ClearSelection();
}
int32_t CFWL_Edit::GetLimit() const {
return m_nLimit;
}
void CFWL_Edit::SetLimit(int32_t nLimit) {
m_nLimit = nLimit;
if (m_nLimit > 0) {
m_pEditEngine->SetHasCharacterLimit(true);
m_pEditEngine->SetCharacterLimit(nLimit);
} else {
m_pEditEngine->SetHasCharacterLimit(false);
}
}
void CFWL_Edit::SetAliasChar(wchar_t wAlias) {
m_pEditEngine->SetAliasChar(wAlias);
}
absl::optional<WideString> CFWL_Edit::Copy() {
if (!m_pEditEngine->HasSelection())
return absl::nullopt;
return m_pEditEngine->GetSelectedText();
}
absl::optional<WideString> CFWL_Edit::Cut() {
if (!m_pEditEngine->HasSelection())
return absl::nullopt;
WideString cut_text = m_pEditEngine->DeleteSelectedText();
UpdateCaret();
return cut_text;
}
bool CFWL_Edit::Paste(const WideString& wsPaste) {
if (m_pEditEngine->HasSelection())
m_pEditEngine->ReplaceSelectedText(wsPaste);
else
m_pEditEngine->Insert(m_CursorPosition, wsPaste);
return true;
}
bool CFWL_Edit::Undo() {
return CanUndo() && m_pEditEngine->Undo();
}
bool CFWL_Edit::Redo() {
return CanRedo() && m_pEditEngine->Redo();
}
bool CFWL_Edit::CanUndo() {
return m_pEditEngine->CanUndo();
}
bool CFWL_Edit::CanRedo() {
return m_pEditEngine->CanRedo();
}
void CFWL_Edit::NotifyTextFull() {
CFWL_Event evt(CFWL_Event::Type::TextFull, this);
DispatchEvent(&evt);
}
void CFWL_Edit::OnCaretChanged() {
if (m_EngineRect.IsEmpty())
return;
if ((m_Properties.m_dwStates & FWL_STATE_WGT_Focused) == 0)
return;
bool bRepaintContent = UpdateOffset();
UpdateCaret();
CFX_RectF rtInvalid;
bool bRepaintScroll = false;
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_MultiLine) {
CFWL_ScrollBar* pScroll = UpdateScroll();
if (pScroll) {
rtInvalid = pScroll->GetWidgetRect();
bRepaintScroll = true;
}
}
if (bRepaintContent || bRepaintScroll) {
if (bRepaintContent)
rtInvalid.Union(m_EngineRect);
RepaintRect(rtInvalid);
}
}
void CFWL_Edit::OnTextWillChange(CFDE_TextEditEngine::TextChange* change) {
CFWL_EventTextWillChange event(this, change->text, change->previous_text,
change->selection_start,
change->selection_end);
DispatchEvent(&event);
change->text = event.GetChangeText();
change->selection_start = event.GetSelectionStart();
change->selection_end = event.GetSelectionEnd();
change->cancelled = event.GetCancelled();
}
void CFWL_Edit::OnTextChanged() {
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_VAlignMask)
UpdateVAlignment();
LayoutScrollBar();
RepaintRect(GetClientRect());
}
void CFWL_Edit::OnSelChanged() {
RepaintRect(GetClientRect());
}
bool CFWL_Edit::OnValidate(const WideString& wsText) {
CFWL_EventValidate event(this, wsText);
DispatchEvent(&event);
return event.GetValidate();
}
void CFWL_Edit::SetScrollOffset(float fScrollOffset) {
m_fScrollOffsetY = fScrollOffset;
}
void CFWL_Edit::DrawContent(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& mtMatrix) {
DrawContentNonComb(pGraphics, mtMatrix);
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_CombText) {
CFGAS_GEGraphics::StateRestorer restorer(pGraphics);
CFGAS_GEPath path;
const int32_t iLimit = m_nLimit > 0 ? m_nLimit : 1;
const float fStep = m_EngineRect.width / iLimit;
float fLeft = m_EngineRect.left + 1;
for (int32_t i = 1; i < iLimit; i++) {
fLeft += fStep;
path.AddLine(CFX_PointF(fLeft, m_ClientRect.top),
CFX_PointF(fLeft, m_ClientRect.bottom()));
}
CFWL_ThemeBackground param(CFWL_ThemePart::Part::kCombTextLine, this,
pGraphics);
param.m_matrix = mtMatrix;
param.SetPath(&path);
GetThemeProvider()->DrawBackground(param);
}
}
void CFWL_Edit::DrawContentNonComb(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& mtMatrix) {
CFGAS_GEGraphics::StateRestorer restorer(pGraphics);
CFX_RectF rtClip = m_EngineRect;
float fOffSetX = m_EngineRect.left - m_fScrollOffsetX;
float fOffSetY = m_EngineRect.top - m_fScrollOffsetY + m_fVAlignOffset;
CFX_Matrix mt(1, 0, 0, 1, fOffSetX, fOffSetY);
rtClip = mtMatrix.TransformRect(rtClip);
mt.Concat(mtMatrix);
bool bShowSel = !!(m_Properties.m_dwStates & FWL_STATE_WGT_Focused);
if (bShowSel && m_pEditEngine->HasSelection()) {
size_t sel_start;
size_t count;
std::tie(sel_start, count) = m_pEditEngine->GetSelection();
std::vector<CFX_RectF> rects = m_pEditEngine->GetCharacterRectsInRange(
pdfium::base::checked_cast<int32_t>(sel_start),
pdfium::base::checked_cast<int32_t>(count));
CFGAS_GEPath path;
for (auto& rect : rects) {
rect.left += fOffSetX;
rect.top += fOffSetY;
path.AddRectangle(rect.left, rect.top, rect.width, rect.height);
}
pGraphics->SetClipRect(rtClip);
CFWL_ThemeBackground param(CFWL_ThemePart::Part::kBackground, this,
pGraphics);
param.m_matrix = mtMatrix;
param.SetPath(&path);
GetThemeProvider()->DrawBackground(param);
}
CFX_RenderDevice* pRenderDev = pGraphics->GetRenderDevice();
RenderText(pRenderDev, rtClip, mt);
}
void CFWL_Edit::RenderText(CFX_RenderDevice* pRenderDev,
const CFX_RectF& clipRect,
const CFX_Matrix& mt) {
DCHECK(pRenderDev);
RetainPtr<CFGAS_GEFont> font = m_pEditEngine->GetFont();
if (!font)
return;
pRenderDev->SetClip_Rect(clipRect.GetOuterRect());
CFX_RectF rtDocClip = clipRect;
if (rtDocClip.IsEmpty()) {
rtDocClip.left = 0;
rtDocClip.top = 0;
rtDocClip.width = static_cast<float>(pRenderDev->GetWidth());
rtDocClip.height = static_cast<float>(pRenderDev->GetHeight());
}
rtDocClip = mt.GetInverse().TransformRect(rtDocClip);
for (const FDE_TEXTEDITPIECE& info : m_pEditEngine->GetTextPieces()) {
// If this character is outside the clip, skip it.
if (!rtDocClip.IntersectWith(info.rtPiece))
continue;
std::vector<TextCharPos> char_pos = m_pEditEngine->GetDisplayPos(info);
if (char_pos.empty())
continue;
CFDE_TextOut::DrawString(pRenderDev, m_pEditEngine->GetFontColor(), font,
char_pos, m_pEditEngine->GetFontSize(), mt);
}
}
void CFWL_Edit::UpdateEditEngine() {
UpdateEditParams();
UpdateEditLayout();
}
void CFWL_Edit::UpdateEditParams() {
m_pEditEngine->SetAvailableWidth(m_EngineRect.width);
m_pEditEngine->SetCombText(
!!(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_CombText));
m_pEditEngine->EnableValidation(
!!(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_Validate));
m_pEditEngine->EnablePasswordMode(
!!(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_Password));
uint32_t alignment = 0;
switch (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_HAlignMask) {
case FWL_STYLEEXT_EDT_HNear: {
alignment |= CFX_TxtLineAlignment_Left;
break;
}
case FWL_STYLEEXT_EDT_HCenter: {
alignment |= CFX_TxtLineAlignment_Center;
break;
}
case FWL_STYLEEXT_EDT_HFar: {
alignment |= CFX_TxtLineAlignment_Right;
break;
}
default:
break;
}
switch (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_HAlignModeMask) {
case FWL_STYLEEXT_EDT_Justified: {
alignment |= CFX_TxtLineAlignment_Justified;
break;
}
default:
break;
}
m_pEditEngine->SetAlignment(alignment);
bool auto_hscroll =
!!(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_AutoHScroll);
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_MultiLine) {
m_pEditEngine->EnableMultiLine(true);
m_pEditEngine->EnableLineWrap(!auto_hscroll);
m_pEditEngine->LimitVerticalScroll(
(m_Properties.m_dwStyles & FWL_STYLE_WGT_VScroll) == 0 &&
(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_AutoVScroll) == 0);
} else {
m_pEditEngine->EnableMultiLine(false);
m_pEditEngine->EnableLineWrap(false);
m_pEditEngine->LimitVerticalScroll(false);
}
m_pEditEngine->LimitHorizontalScroll(!auto_hscroll);
IFWL_ThemeProvider* theme = GetThemeProvider();
CFWL_ThemePart part(CFWL_ThemePart::Part::kNone, this);
m_fFontSize = theme->GetFontSize(part);
RetainPtr<CFGAS_GEFont> pFont = theme->GetFont(part);
if (!pFont)
return;
m_pEditEngine->SetFont(pFont);
m_pEditEngine->SetFontColor(theme->GetTextColor(part));
m_pEditEngine->SetFontSize(m_fFontSize);
m_pEditEngine->SetLineSpace(theme->GetLineHeight(part));
m_pEditEngine->SetTabWidth(m_fFontSize);
m_pEditEngine->SetVisibleLineCount(m_EngineRect.height /
theme->GetLineHeight(part));
}
void CFWL_Edit::UpdateEditLayout() {
m_pEditEngine->Layout();
}
bool CFWL_Edit::UpdateOffset() {
CFX_RectF rtCaret = m_CaretRect;
float fOffSetX = m_EngineRect.left - m_fScrollOffsetX;
float fOffSetY = m_EngineRect.top - m_fScrollOffsetY + m_fVAlignOffset;
rtCaret.Offset(fOffSetX, fOffSetY);
const CFX_RectF& edit_bounds = m_EngineRect;
if (edit_bounds.Contains(rtCaret)) {
CFX_RectF contents_bounds = m_pEditEngine->GetContentsBoundingBox();
contents_bounds.Offset(fOffSetX, fOffSetY);
if (contents_bounds.right() < edit_bounds.right() && m_fScrollOffsetX > 0) {
m_fScrollOffsetX += contents_bounds.right() - edit_bounds.right();
m_fScrollOffsetX = std::max(m_fScrollOffsetX, 0.0f);
}
if (contents_bounds.bottom() < edit_bounds.bottom() &&
m_fScrollOffsetY > 0) {
m_fScrollOffsetY += contents_bounds.bottom() - edit_bounds.bottom();
m_fScrollOffsetY = std::max(m_fScrollOffsetY, 0.0f);
}
return false;
}
float offsetX = 0.0;
float offsetY = 0.0;
if (rtCaret.left < edit_bounds.left)
offsetX = rtCaret.left - edit_bounds.left;
if (rtCaret.right() > edit_bounds.right())
offsetX = rtCaret.right() - edit_bounds.right();
if (rtCaret.top < edit_bounds.top)
offsetY = rtCaret.top - edit_bounds.top;
if (rtCaret.bottom() > edit_bounds.bottom())
offsetY = rtCaret.bottom() - edit_bounds.bottom();
m_fScrollOffsetX += offsetX;
m_fScrollOffsetY += offsetY;
if (m_fFontSize > m_EngineRect.height)
m_fScrollOffsetY = 0;
return true;
}
bool CFWL_Edit::UpdateOffset(CFWL_ScrollBar* pScrollBar, float fPosChanged) {
m_fScrollOffsetY += fPosChanged;
return true;
}
void CFWL_Edit::UpdateVAlignment() {
IFWL_ThemeProvider* theme = GetThemeProvider();
CFWL_ThemePart part(CFWL_ThemePart::Part::kNone, this);
const CFX_SizeF pSpace = theme->GetSpaceAboveBelow(part);
const float fSpaceAbove = pSpace.width >= 0.1f ? pSpace.width : 0.0f;
const float fSpaceBelow = pSpace.height >= 0.1f ? pSpace.height : 0.0f;
float fOffsetY = 0.0f;
CFX_RectF contents_bounds = m_pEditEngine->GetContentsBoundingBox();
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_VCenter) {
fOffsetY = (m_EngineRect.height - contents_bounds.height) / 2.0f;
if (fOffsetY < (fSpaceAbove + fSpaceBelow) / 2.0f &&
fSpaceAbove < fSpaceBelow) {
return;
}
fOffsetY += (fSpaceAbove - fSpaceBelow) / 2.0f;
} else if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_VFar) {
fOffsetY = (m_EngineRect.height - contents_bounds.height);
fOffsetY -= fSpaceBelow;
} else {
fOffsetY += fSpaceAbove;
}
m_fVAlignOffset = std::max(fOffsetY, 0.0f);
}
void CFWL_Edit::UpdateCaret() {
CFX_RectF rtCaret = m_CaretRect;
rtCaret.Offset(m_EngineRect.left - m_fScrollOffsetX,
m_EngineRect.top - m_fScrollOffsetY + m_fVAlignOffset);
CFX_RectF rtClient = GetClientRect();
rtCaret.Intersect(rtClient);
if (rtCaret.left > rtClient.right()) {
float right = rtCaret.right();
rtCaret.left = rtClient.right() - 1;
rtCaret.width = right - rtCaret.left;
}
if (m_Properties.m_dwStates & FWL_STATE_WGT_Focused && !rtCaret.IsEmpty())
ShowCaret(&rtCaret);
else
HideCaret(&rtCaret);
}
CFWL_ScrollBar* CFWL_Edit::UpdateScroll() {
bool bShowVert = m_pVertScrollBar && m_pVertScrollBar->IsVisible();
if (!bShowVert)
return nullptr;
CFX_RectF contents_bounds = m_pEditEngine->GetContentsBoundingBox();
CFX_RectF rtScroll = m_pVertScrollBar->GetWidgetRect();
if (rtScroll.height < contents_bounds.height) {
float fStep = m_pEditEngine->GetLineSpace();
float fRange =
std::max(contents_bounds.height - m_EngineRect.height, fStep);
m_pVertScrollBar->SetRange(0.0f, fRange);
float fPos = pdfium::clamp(m_fScrollOffsetY, 0.0f, fRange);
m_pVertScrollBar->SetPos(fPos);
m_pVertScrollBar->SetTrackPos(fPos);
m_pVertScrollBar->SetPageSize(rtScroll.height);
m_pVertScrollBar->SetStepSize(fStep);
m_pVertScrollBar->RemoveStates(FWL_STATE_WGT_Disabled);
m_pVertScrollBar->Update();
return m_pVertScrollBar;
}
if ((m_pVertScrollBar->GetStates() & FWL_STATE_WGT_Disabled) == 0) {
m_pVertScrollBar->SetRange(0, -1);
m_pVertScrollBar->SetStates(FWL_STATE_WGT_Disabled);
m_pVertScrollBar->Update();
return m_pVertScrollBar;
}
return nullptr;
}
bool CFWL_Edit::IsShowVertScrollBar() const {
const bool bShow =
!(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_ShowScrollbarFocus) ||
(m_Properties.m_dwStates & FWL_STATE_WGT_Focused);
return bShow && (m_Properties.m_dwStyles & FWL_STYLE_WGT_VScroll) &&
(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_MultiLine) &&
IsContentHeightOverflow();
}
bool CFWL_Edit::IsContentHeightOverflow() const {
return m_pEditEngine->GetContentsBoundingBox().height >
m_EngineRect.height + 1.0f;
}
void CFWL_Edit::Layout() {
m_ClientRect = GetClientRect();
m_EngineRect = m_ClientRect;
IFWL_ThemeProvider* theme = GetThemeProvider();
float fWidth = theme->GetScrollBarWidth();
if (!GetOuter()) {
CFWL_ThemePart part(CFWL_ThemePart::Part::kNone, this);
CFX_RectF pUIMargin = theme->GetUIMargin(part);
m_EngineRect.Deflate(pUIMargin.left, pUIMargin.top, pUIMargin.width,
pUIMargin.height);
} else if (GetOuter()->GetClassID() == FWL_Type::DateTimePicker) {
CFWL_ThemePart part(CFWL_ThemePart::Part::kNone, GetOuter());
CFX_RectF pUIMargin = theme->GetUIMargin(part);
m_EngineRect.Deflate(pUIMargin.left, pUIMargin.top, pUIMargin.width,
pUIMargin.height);
}
bool bShowVertScrollbar = IsShowVertScrollBar();
if (bShowVertScrollbar) {
InitVerticalScrollBar();
CFX_RectF rtVertScr;
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_OuterScrollbar) {
rtVertScr = CFX_RectF(m_ClientRect.right() + kEditMargin,
m_ClientRect.top, fWidth, m_ClientRect.height);
} else {
rtVertScr = CFX_RectF(m_ClientRect.right() - fWidth, m_ClientRect.top,
fWidth, m_ClientRect.height);
m_EngineRect.width -= fWidth;
}
m_pVertScrollBar->SetWidgetRect(rtVertScr);
m_pVertScrollBar->RemoveStates(FWL_STATE_WGT_Invisible);
m_pVertScrollBar->Update();
} else if (m_pVertScrollBar) {
m_pVertScrollBar->SetStates(FWL_STATE_WGT_Invisible);
}
}
void CFWL_Edit::LayoutScrollBar() {
if (!(m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_ShowScrollbarFocus))
return;
bool bShowVertScrollbar = IsShowVertScrollBar();
IFWL_ThemeProvider* theme = GetThemeProvider();
float fWidth = theme->GetScrollBarWidth();
if (bShowVertScrollbar) {
if (!m_pVertScrollBar) {
InitVerticalScrollBar();
CFX_RectF rtVertScr;
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_OuterScrollbar) {
rtVertScr = CFX_RectF(m_ClientRect.right() + kEditMargin,
m_ClientRect.top, fWidth, m_ClientRect.height);
} else {
rtVertScr = CFX_RectF(m_ClientRect.right() - fWidth, m_ClientRect.top,
fWidth, m_ClientRect.height);
}
m_pVertScrollBar->SetWidgetRect(rtVertScr);
m_pVertScrollBar->Update();
}
m_pVertScrollBar->RemoveStates(FWL_STATE_WGT_Invisible);
} else if (m_pVertScrollBar) {
m_pVertScrollBar->SetStates(FWL_STATE_WGT_Invisible);
}
if (bShowVertScrollbar)
UpdateScroll();
}
CFX_PointF CFWL_Edit::DeviceToEngine(const CFX_PointF& pt) {
return pt + CFX_PointF(m_fScrollOffsetX - m_EngineRect.left,
m_fScrollOffsetY - m_EngineRect.top - m_fVAlignOffset);
}
void CFWL_Edit::InitVerticalScrollBar() {
if (m_pVertScrollBar)
return;
m_pVertScrollBar = cppgc::MakeGarbageCollected<CFWL_ScrollBar>(
GetFWLApp()->GetHeap()->GetAllocationHandle(), GetFWLApp(),
Properties{0, FWL_STYLEEXT_SCB_Vert,
FWL_STATE_WGT_Disabled | FWL_STATE_WGT_Invisible},
this);
}
void CFWL_Edit::ShowCaret(CFX_RectF* pRect) {
if (m_pCaret) {
m_pCaret->ShowCaret();
if (!pRect->IsEmpty())
m_pCaret->SetWidgetRect(*pRect);
RepaintRect(m_EngineRect);
return;
}
CFWL_Widget* pOuter = this;
pRect->Offset(m_WidgetRect.left, m_WidgetRect.top);
while (pOuter->GetOuter()) {
pOuter = pOuter->GetOuter();
CFX_RectF rtOuter = pOuter->GetWidgetRect();
pRect->Offset(rtOuter.left, rtOuter.top);
}
CFWL_Widget::AdapterIface* pXFAWidget = pOuter->GetAdapterIface();
if (!pXFAWidget)
return;
CFX_RectF rt = pXFAWidget->GetRotateMatrix().TransformRect(*pRect);
pXFAWidget->DisplayCaret(true, &rt);
}
void CFWL_Edit::HideCaret(CFX_RectF* pRect) {
if (m_pCaret) {
m_pCaret->HideCaret();
RepaintRect(m_EngineRect);
return;
}
CFWL_Widget* pOuter = this;
while (pOuter->GetOuter())
pOuter = pOuter->GetOuter();
CFWL_Widget::AdapterIface* pXFAWidget = pOuter->GetAdapterIface();
if (!pXFAWidget)
return;
pXFAWidget->DisplayCaret(false, pRect);
}
void CFWL_Edit::InitCaret() {
if (m_pCaret)
return;
m_pCaret = cppgc::MakeGarbageCollected<CFWL_Caret>(
GetFWLApp()->GetHeap()->GetAllocationHandle(), GetFWLApp(), Properties(),
this);
m_pCaret->SetStates(m_Properties.m_dwStates);
UpdateCursorRect();
}
void CFWL_Edit::UpdateCursorRect() {
int32_t bidi_level;
if (m_pEditEngine->CanGenerateCharacterInfo()) {
std::tie(bidi_level, m_CaretRect) = m_pEditEngine->GetCharacterInfo(
pdfium::base::checked_cast<int32_t>(m_CursorPosition));
} else {
bidi_level = 0;
m_CaretRect = CFX_RectF();
}
// TODO(dsinclair): This should handle bidi level ...
m_CaretRect.width = 1.0f;
// TODO(hnakashima): Handle correctly edits with empty text instead of using
// these defaults.
if (m_CaretRect.height == 0)
m_CaretRect.height = 8.0f;
}
void CFWL_Edit::SetCursorPosition(size_t position) {
if (m_CursorPosition == position)
return;
m_CursorPosition = std::min(position, m_pEditEngine->GetLength());
UpdateCursorRect();
OnCaretChanged();
}
void CFWL_Edit::OnProcessMessage(CFWL_Message* pMessage) {
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;
case CFWL_MessageMouse::MouseCommand::kLeftButtonDblClk:
OnButtonDoubleClick(pMsg);
break;
case CFWL_MessageMouse::MouseCommand::kMove:
OnMouseMove(pMsg);
break;
case CFWL_MessageMouse::MouseCommand::kRightButtonDown:
DoRButtonDown(pMsg);
break;
default:
break;
}
break;
}
case CFWL_Message::Type::kKey: {
CFWL_MessageKey* pKey = static_cast<CFWL_MessageKey*>(pMessage);
if (pKey->m_dwCmd == CFWL_MessageKey::KeyCommand::kKeyDown)
OnKeyDown(pKey);
else if (pKey->m_dwCmd == CFWL_MessageKey::KeyCommand::kChar)
OnChar(pKey);
break;
}
default:
break;
}
// Dst target could be |this|, continue only if not destroyed by above.
if (pMessage->GetDstTarget())
CFWL_Widget::OnProcessMessage(pMessage);
}
void CFWL_Edit::OnProcessEvent(CFWL_Event* pEvent) {
if (!pEvent || pEvent->GetType() != CFWL_Event::Type::Scroll)
return;
CFWL_Widget* pSrcTarget = pEvent->GetSrcTarget();
if ((pSrcTarget == m_pVertScrollBar && m_pVertScrollBar)) {
CFWL_EventScroll* pScrollEvent = static_cast<CFWL_EventScroll*>(pEvent);
OnScroll(static_cast<CFWL_ScrollBar*>(pSrcTarget),
pScrollEvent->GetScrollCode(), pScrollEvent->GetPos());
}
}
void CFWL_Edit::OnDrawWidget(CFGAS_GEGraphics* pGraphics,
const CFX_Matrix& matrix) {
DrawWidget(pGraphics, matrix);
}
void CFWL_Edit::DoRButtonDown(CFWL_MessageMouse* pMsg) {
SetCursorPosition(
m_pEditEngine->GetIndexForPoint(DeviceToEngine(pMsg->m_pos)));
}
void CFWL_Edit::OnFocusGained() {
m_Properties.m_dwStates |= FWL_STATE_WGT_Focused;
UpdateVAlignment();
UpdateOffset();
UpdateCaret();
LayoutScrollBar();
}
void CFWL_Edit::OnFocusLost() {
bool bRepaint = false;
if (m_Properties.m_dwStates & FWL_STATE_WGT_Focused) {
m_Properties.m_dwStates &= ~FWL_STATE_WGT_Focused;
HideCaret(nullptr);
if (HasSelection()) {
ClearSelection();
bRepaint = true;
}
UpdateOffset();
}
LayoutScrollBar();
if (!bRepaint)
return;
RepaintRect(CFX_RectF(0, 0, m_WidgetRect.width, m_WidgetRect.height));
}
void CFWL_Edit::OnLButtonDown(CFWL_MessageMouse* pMsg) {
if (m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)
return;
m_bLButtonDown = true;
SetGrab(true);
bool bRepaint = false;
if (m_pEditEngine->HasSelection()) {
m_pEditEngine->ClearSelection();
bRepaint = true;
}
size_t index_at_click =
m_pEditEngine->GetIndexForPoint(DeviceToEngine(pMsg->m_pos));
if (index_at_click != m_CursorPosition &&
!!(pMsg->m_dwFlags & XFA_FWL_KeyFlag::kShift)) {
size_t start = std::min(m_CursorPosition, index_at_click);
size_t end = std::max(m_CursorPosition, index_at_click);
m_pEditEngine->SetSelection(start, end - start);
bRepaint = true;
} else {
SetCursorPosition(index_at_click);
}
if (bRepaint)
RepaintRect(m_EngineRect);
}
void CFWL_Edit::OnLButtonUp(CFWL_MessageMouse* pMsg) {
m_bLButtonDown = false;
SetGrab(false);
}
void CFWL_Edit::OnButtonDoubleClick(CFWL_MessageMouse* pMsg) {
size_t click_idx =
m_pEditEngine->GetIndexForPoint(DeviceToEngine(pMsg->m_pos));
size_t start_idx;
size_t count;
std::tie(start_idx, count) = m_pEditEngine->BoundsForWordAt(click_idx);
m_pEditEngine->SetSelection(start_idx, count);
m_CursorPosition = start_idx + count;
RepaintRect(m_EngineRect);
}
void CFWL_Edit::OnMouseMove(CFWL_MessageMouse* pMsg) {
bool shift = !!(pMsg->m_dwFlags & XFA_FWL_KeyFlag::kShift);
if (!m_bLButtonDown || !shift)
return;
size_t old_cursor_pos = m_CursorPosition;
SetCursorPosition(
m_pEditEngine->GetIndexForPoint(DeviceToEngine(pMsg->m_pos)));
if (old_cursor_pos == m_CursorPosition)
return;
size_t length = m_pEditEngine->GetLength();
if (m_CursorPosition > length)
SetCursorPosition(length);
size_t sel_start = 0;
size_t count = 0;
if (m_pEditEngine->HasSelection())
std::tie(sel_start, count) = m_pEditEngine->GetSelection();
else
sel_start = old_cursor_pos;
size_t start_pos = std::min(sel_start, m_CursorPosition);
size_t end_pos = std::max(sel_start, m_CursorPosition);
m_pEditEngine->SetSelection(start_pos, end_pos - start_pos);
}
void CFWL_Edit::OnKeyDown(CFWL_MessageKey* pMsg) {
bool bShift = !!(pMsg->m_dwFlags & XFA_FWL_KeyFlag::kShift);
bool bCtrl = !!(pMsg->m_dwFlags & XFA_FWL_KeyFlag::kCtrl);
size_t sel_start = m_CursorPosition;
if (m_pEditEngine->HasSelection()) {
size_t start_idx;
size_t count;
std::tie(start_idx, count) = m_pEditEngine->GetSelection();
sel_start = start_idx;
}
switch (pMsg->m_dwKeyCodeOrChar) {
case XFA_FWL_VKEY_Left:
SetCursorPosition(m_pEditEngine->GetIndexLeft(m_CursorPosition));
break;
case XFA_FWL_VKEY_Right:
SetCursorPosition(m_pEditEngine->GetIndexRight(m_CursorPosition));
break;
case XFA_FWL_VKEY_Up:
SetCursorPosition(m_pEditEngine->GetIndexUp(m_CursorPosition));
break;
case XFA_FWL_VKEY_Down:
SetCursorPosition(m_pEditEngine->GetIndexDown(m_CursorPosition));
break;
case XFA_FWL_VKEY_Home:
SetCursorPosition(
bCtrl ? 0 : m_pEditEngine->GetIndexAtStartOfLine(m_CursorPosition));
break;
case XFA_FWL_VKEY_End:
SetCursorPosition(
bCtrl ? m_pEditEngine->GetLength()
: m_pEditEngine->GetIndexAtEndOfLine(m_CursorPosition));
break;
case XFA_FWL_VKEY_Delete: {
if ((m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_ReadOnly) ||
(m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)) {
break;
}
m_pEditEngine->Delete(m_CursorPosition, 1);
UpdateCaret();
break;
}
case XFA_FWL_VKEY_Insert:
case XFA_FWL_VKEY_F2:
case XFA_FWL_VKEY_Tab:
default:
break;
}
// Update the selection.
if (bShift && sel_start != m_CursorPosition) {
m_pEditEngine->SetSelection(std::min(sel_start, m_CursorPosition),
std::max(sel_start, m_CursorPosition));
RepaintRect(m_EngineRect);
}
}
void CFWL_Edit::OnChar(CFWL_MessageKey* pMsg) {
if ((m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_ReadOnly) ||
(m_Properties.m_dwStates & FWL_STATE_WGT_Disabled)) {
return;
}
wchar_t c = static_cast<wchar_t>(pMsg->m_dwKeyCodeOrChar);
switch (c) {
case L'\b':
if (m_CursorPosition > 0) {
SetCursorPosition(m_CursorPosition - 1);
m_pEditEngine->Delete(m_CursorPosition, 1);
UpdateCaret();
}
break;
case L'\n':
case 27: // Esc
case 127: // Delete
break;
case L'\t':
m_pEditEngine->Insert(m_CursorPosition, L"\t");
SetCursorPosition(m_CursorPosition + 1);
break;
case L'\r':
if (m_Properties.m_dwStyleExts & FWL_STYLEEXT_EDT_WantReturn) {
m_pEditEngine->Insert(m_CursorPosition, L"\n");
SetCursorPosition(m_CursorPosition + 1);
}
break;
default: {
if (pMsg->m_dwFlags & kEditingModifier)
break;
m_pEditEngine->Insert(m_CursorPosition, WideString(c));
SetCursorPosition(m_CursorPosition + 1);
break;
}
}
}
bool CFWL_Edit::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)
return true;
pScrollBar->SetPos(fPos);
pScrollBar->SetTrackPos(fPos);
UpdateOffset(pScrollBar, fPos - iCurPos);
UpdateCaret();
CFX_RectF rect = GetWidgetRect();
RepaintRect(CFX_RectF(0, 0, rect.width + 2, rect.height + 2));
return true;
}
Reference in New Issue View Git Blame Copy Permalink