// 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_edit.h"
#include <algorithm>
#include <memory>
#include <utility>
#include <vector>
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
#include "xfa/fde/cfde_texteditengine.h"
#include "xfa/fde/cfde_textout.h"
#include "xfa/fgas/font/cfgas_gefont.h"
#include "xfa/fwl/cfwl_app.h"
#include "xfa/fwl/cfwl_caret.h"
#include "xfa/fwl/cfwl_event.h"
#include "xfa/fwl/cfwl_eventcheckword.h"
#include "xfa/fwl/cfwl_eventtextchanged.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/ifwl_themeprovider.h"
#include "xfa/fwl/theme/cfwl_utils.h"
#include "xfa/fxfa/cxfa_ffdoc.h"
#include "xfa/fxfa/cxfa_ffwidget.h"
#include "xfa/fxgraphics/cxfa_gepath.h"
namespace {
const int kEditMargin = 3;
#if (_FX_OS_ == _FX_OS_MACOSX_)
constexpr int kEditingModifier = FWL_KEYFLAG_Command;
#else
constexpr int kEditingModifier = FWL_KEYFLAG_Ctrl;
#endif
bool FxEditIsLatinWord(wchar_t c) {
return c == 0x2D || (c <= 0x005A && c >= 0x0041) ||
(c <= 0x007A && c >= 0x0061) || (c <= 0x02AF && c >= 0x00C0) ||
c == 0x0027;
}
void AddSquigglyPath(CXFA_GEPath* pPathData,
float fStartX,
float fEndX,
float fY,
float fStep) {
pPathData->MoveTo(CFX_PointF(fStartX, fY));
int i = 1;
for (float fx = fStartX + fStep; fx < fEndX; fx += fStep, ++i)
pPathData->LineTo(CFX_PointF(fx, fY + (i & 1) * fStep));
}
} // namespace
CFWL_Edit::CFWL_Edit(const CFWL_App* app,
std::unique_ptr<CFWL_WidgetProperties> properties,
CFWL_Widget* pOuter)
: CFWL_Widget(app, std::move(properties), pOuter),
m_fVAlignOffset(0.0f),
m_fScrollOffsetX(0.0f),
m_fScrollOffsetY(0.0f),
m_bLButtonDown(false),
m_CursorPosition(0),
m_nLimit(-1),
m_fFontSize(0),
m_bSetRange(false),
m_iMax(0xFFFFFFF) {
m_rtClient.Reset();
m_rtEngine.Reset();
m_rtStatic.Reset();
InitCaret();
m_EdtEngine.SetDelegate(this);
}
CFWL_Edit::~CFWL_Edit() {
if (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)
HideCaret(nullptr);
}
FWL_Type CFWL_Edit::GetClassID() const {
return FWL_Type::Edit;
}
CFX_RectF CFWL_Edit::GetWidgetRect() {
CFX_RectF rect = m_pProperties->m_rtWidget;
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_OuterScrollbar) {
IFWL_ThemeProvider* theme = GetAvailableTheme();
float scrollbarWidth = theme ? theme->GetScrollBarWidth() : 0.0f;
if (IsShowScrollBar(true)) {
rect.width += scrollbarWidth;
rect.width += kEditMargin;
}
if (IsShowScrollBar(false)) {
rect.height += scrollbarWidth;
rect.height += kEditMargin;
}
}
return rect;
}
CFX_RectF CFWL_Edit::GetAutosizedWidgetRect() {
CFX_RectF rect;
if (m_EdtEngine.GetLength() > 0) {
CFX_SizeF size = CalcTextSize(
m_EdtEngine.GetText(), m_pProperties->m_pThemeProvider,
!!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_MultiLine));
rect = CFX_RectF(0, 0, size);
}
InflateWidgetRect(rect);
return rect;
}
void CFWL_Edit::SetStates(uint32_t dwStates) {
if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Invisible) ||
(m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)) {
HideCaret(nullptr);
}
CFWL_Widget::SetStates(dwStates);
}
void CFWL_Edit::Update() {
if (IsLocked())
return;
if (!m_pProperties->m_pThemeProvider)
m_pProperties->m_pThemeProvider = GetAvailableTheme();
Layout();
if (m_rtClient.IsEmpty())
return;
UpdateEditEngine();
UpdateVAlignment();
UpdateScroll();
InitCaret();
}
FWL_WidgetHit CFWL_Edit::HitTest(const CFX_PointF& point) {
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_OuterScrollbar) {
if (IsShowScrollBar(true)) {
if (m_pVertScrollBar->GetWidgetRect().Contains(point))
return FWL_WidgetHit::VScrollBar;
}
if (IsShowScrollBar(false)) {
if (m_pHorzScrollBar->GetWidgetRect().Contains(point))
return FWL_WidgetHit::HScrollBar;
}
}
if (m_rtClient.Contains(point))
return FWL_WidgetHit::Edit;
return FWL_WidgetHit::Unknown;
}
void CFWL_Edit::AddSpellCheckObj(CXFA_GEPath& PathData,
int32_t nStart,
int32_t nCount,
float fOffSetX,
float fOffSetY) {
float fStep = m_EdtEngine.GetFontSize() / 16.0f;
float font_ascent = m_EdtEngine.GetFontAscent();
std::vector<CFX_RectF> rects =
m_EdtEngine.GetCharacterRectsInRange(nStart, nCount);
for (const auto& rect : rects) {
float fY = rect.top + font_ascent + fOffSetY;
float fStartX = rect.left + fOffSetX;
float fEndX = fStartX + rect.Width();
AddSquigglyPath(&PathData, fStartX, fEndX, fY, fStep);
}
}
void CFWL_Edit::DrawSpellCheck(CXFA_Graphics* pGraphics,
const CFX_Matrix* pMatrix) {
pGraphics->SaveGraphState();
if (pMatrix)
pGraphics->ConcatMatrix(pMatrix);
CFWL_EventCheckWord checkWordEvent(this);
ByteString sLatinWord;
CXFA_GEPath pathSpell;
int32_t nStart = 0;
float fOffSetX = m_rtEngine.left - m_fScrollOffsetX;
float fOffSetY = m_rtEngine.top - m_fScrollOffsetY + m_fVAlignOffset;
WideString wsSpell = GetText();
int32_t nContentLen = wsSpell.GetLength();
for (int i = 0; i < nContentLen; i++) {
if (FxEditIsLatinWord(wsSpell[i])) {
if (sLatinWord.IsEmpty())
nStart = i;
sLatinWord += (char)wsSpell[i];
continue;
}
checkWordEvent.bsWord = sLatinWord;
checkWordEvent.bCheckWord = true;
DispatchEvent(&checkWordEvent);
if (!sLatinWord.IsEmpty() && !checkWordEvent.bCheckWord) {
AddSpellCheckObj(pathSpell, nStart, sLatinWord.GetLength(), fOffSetX,
fOffSetY);
}
sLatinWord.clear();
}
checkWordEvent.bsWord = sLatinWord;
checkWordEvent.bCheckWord = true;
DispatchEvent(&checkWordEvent);
if (!sLatinWord.IsEmpty() && !checkWordEvent.bCheckWord) {
AddSpellCheckObj(pathSpell, nStart, sLatinWord.GetLength(), fOffSetX,
fOffSetY);
}
if (!pathSpell.IsEmpty()) {
CFX_RectF rtClip = m_rtEngine;
CFX_Matrix mt(1, 0, 0, 1, fOffSetX, fOffSetY);
if (pMatrix) {
rtClip = pMatrix->TransformRect(rtClip);
mt.Concat(*pMatrix);
}
pGraphics->SetClipRect(rtClip);
pGraphics->SetStrokeColor(CXFA_GEColor(0xFFFF0000));
pGraphics->SetLineWidth(0);
pGraphics->StrokePath(&pathSpell, nullptr);
}
pGraphics->RestoreGraphState();
}
void CFWL_Edit::DrawWidget(CXFA_Graphics* pGraphics, const CFX_Matrix& matrix) {
if (!pGraphics)
return;
if (!m_pProperties->m_pThemeProvider)
return;
if (m_rtClient.IsEmpty())
return;
IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
if (!m_pWidgetMgr->IsFormDisabled())
DrawTextBk(pGraphics, pTheme, &matrix);
DrawContent(pGraphics, pTheme, &matrix);
if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) &&
!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_ReadOnly)) {
DrawSpellCheck(pGraphics, &matrix);
}
if (HasBorder())
DrawBorder(pGraphics, CFWL_Part::Border, pTheme, matrix);
}
void CFWL_Edit::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
if (!pThemeProvider)
return;
if (m_pHorzScrollBar)
m_pHorzScrollBar->SetThemeProvider(pThemeProvider);
if (m_pVertScrollBar)
m_pVertScrollBar->SetThemeProvider(pThemeProvider);
if (m_pCaret)
m_pCaret->SetThemeProvider(pThemeProvider);
m_pProperties->m_pThemeProvider = pThemeProvider;
}
void CFWL_Edit::SetText(const WideString& wsText) {
m_EdtEngine.Clear();
m_EdtEngine.Insert(0, wsText);
}
int32_t CFWL_Edit::GetTextLength() const {
return m_EdtEngine.GetLength();
}
WideString CFWL_Edit::GetText() const {
return m_EdtEngine.GetText();
}
void CFWL_Edit::ClearText() {
m_EdtEngine.Clear();
}
void CFWL_Edit::SelectAll() {
m_EdtEngine.SelectAll();
}
bool CFWL_Edit::HasSelection() const {
return m_EdtEngine.HasSelection();
}
std::pair<size_t, size_t> CFWL_Edit::GetSelection() const {
return m_EdtEngine.GetSelection();
}
void CFWL_Edit::ClearSelection() {
return m_EdtEngine.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_EdtEngine.SetHasCharacterLimit(true);
m_EdtEngine.SetCharacterLimit(nLimit);
} else {
m_EdtEngine.SetHasCharacterLimit(false);
}
}
void CFWL_Edit::SetAliasChar(wchar_t wAlias) {
m_EdtEngine.SetAliasChar(wAlias);
}
Optional<WideString> CFWL_Edit::Copy() {
if (!m_EdtEngine.HasSelection())
return {};
return {m_EdtEngine.GetSelectedText()};
}
Optional<WideString> CFWL_Edit::Cut() {
if (!m_EdtEngine.HasSelection())
return {};
return {m_EdtEngine.DeleteSelectedText()};
}
bool CFWL_Edit::Paste(const WideString& wsPaste) {
if (m_EdtEngine.HasSelection())
m_EdtEngine.ReplaceSelectedText(wsPaste);
else
m_EdtEngine.Insert(m_CursorPosition, wsPaste);
return true;
}
bool CFWL_Edit::Undo() {
return CanUndo() ? m_EdtEngine.Undo() : false;
}
bool CFWL_Edit::Redo() {
return CanRedo() ? m_EdtEngine.Redo() : false;
}
bool CFWL_Edit::CanUndo() {
return m_EdtEngine.CanUndo();
}
bool CFWL_Edit::CanRedo() {
return m_EdtEngine.CanRedo();
}
void CFWL_Edit::SetOuter(CFWL_Widget* pOuter) {
m_pOuter = pOuter;
}
void CFWL_Edit::NotifyTextFull() {
CFWL_Event evt(CFWL_Event::Type::TextFull, this);
DispatchEvent(&evt);
}
void CFWL_Edit::OnCaretChanged() {
if (m_rtEngine.IsEmpty())
return;
if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)
return;
bool bRepaintContent = UpdateOffset();
UpdateCaret();
CFX_RectF rtInvalid;
bool bRepaintScroll = false;
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_MultiLine) {
CFWL_ScrollBar* pScroll = UpdateScroll();
if (pScroll) {
rtInvalid = pScroll->GetWidgetRect();
bRepaintScroll = true;
}
}
if (bRepaintContent || bRepaintScroll) {
if (bRepaintContent)
rtInvalid.Union(m_rtEngine);
RepaintRect(rtInvalid);
}
}
void CFWL_Edit::OnTextChanged(const WideString& prevText) {
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_VAlignMask)
UpdateVAlignment();
CFWL_EventTextChanged event(this);
event.wsPrevText = prevText;
DispatchEvent(&event);
LayoutScrollBar();
RepaintRect(GetClientRect());
}
void CFWL_Edit::OnSelChanged() {
RepaintRect(GetClientRect());
}
bool CFWL_Edit::OnValidate(const WideString& wsText) {
CFWL_Widget* pDst = GetOuter();
if (!pDst)
pDst = this;
CFWL_EventValidate event(this);
event.wsInsert = wsText;
event.bValidate = true;
DispatchEvent(&event);
return event.bValidate;
}
void CFWL_Edit::SetScrollOffset(float fScrollOffset) {
m_fScrollOffsetY = fScrollOffset;
}
void CFWL_Edit::DrawTextBk(CXFA_Graphics* pGraphics,
IFWL_ThemeProvider* pTheme,
const CFX_Matrix* pMatrix) {
CFWL_ThemeBackground param;
param.m_pWidget = this;
param.m_iPart = CFWL_Part::Background;
param.m_bStaticBackground = false;
param.m_dwStates = m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_ReadOnly
? CFWL_PartState_ReadOnly
: CFWL_PartState_Normal;
uint32_t dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled);
if (dwStates)
param.m_dwStates = CFWL_PartState_Disabled;
param.m_pGraphics = pGraphics;
param.m_matrix = *pMatrix;
param.m_rtPart = m_rtClient;
pTheme->DrawBackground(¶m);
if (!IsShowScrollBar(true) || !IsShowScrollBar(false))
return;
CFX_RectF rtScroll = m_pHorzScrollBar->GetWidgetRect();
CFX_RectF rtStatic(m_rtClient.right() - rtScroll.height,
m_rtClient.bottom() - rtScroll.height, rtScroll.height,
rtScroll.height);
param.m_bStaticBackground = true;
param.m_bMaximize = true;
param.m_rtPart = rtStatic;
pTheme->DrawBackground(¶m);
}
void CFWL_Edit::DrawContent(CXFA_Graphics* pGraphics,
IFWL_ThemeProvider* pTheme,
const CFX_Matrix* pMatrix) {
pGraphics->SaveGraphState();
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_CombText)
pGraphics->SaveGraphState();
CFX_RectF rtClip = m_rtEngine;
float fOffSetX = m_rtEngine.left - m_fScrollOffsetX;
float fOffSetY = m_rtEngine.top - m_fScrollOffsetY + m_fVAlignOffset;
CFX_Matrix mt(1, 0, 0, 1, fOffSetX, fOffSetY);
if (pMatrix) {
rtClip = pMatrix->TransformRect(rtClip);
mt.Concat(*pMatrix);
}
bool bShowSel = !!(m_pProperties->m_dwStates & FWL_WGTSTATE_Focused);
if (bShowSel && m_EdtEngine.HasSelection()) {
size_t sel_start;
size_t count;
std::tie(sel_start, count) = m_EdtEngine.GetSelection();
std::vector<CFX_RectF> rects =
m_EdtEngine.GetCharacterRectsInRange(sel_start, count);
CXFA_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;
param.m_pGraphics = pGraphics;
param.m_matrix = *pMatrix;
param.m_pWidget = this;
param.m_iPart = CFWL_Part::Background;
param.m_pPath = &path;
pTheme->DrawBackground(¶m);
}
CFX_RenderDevice* pRenderDev = pGraphics->GetRenderDevice();
if (!pRenderDev)
return;
RenderText(pRenderDev, rtClip, mt);
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_CombText) {
pGraphics->RestoreGraphState();
CXFA_GEPath path;
int32_t iLimit = m_nLimit > 0 ? m_nLimit : 1;
float fStep = m_rtEngine.width / iLimit;
float fLeft = m_rtEngine.left + 1;
for (int32_t i = 1; i < iLimit; i++) {
fLeft += fStep;
path.AddLine(CFX_PointF(fLeft, m_rtClient.top),
CFX_PointF(fLeft, m_rtClient.bottom()));
}
CFWL_ThemeBackground param;
param.m_pGraphics = pGraphics;
param.m_matrix = *pMatrix;
param.m_pWidget = this;
param.m_iPart = CFWL_Part::CombTextLine;
param.m_pPath = &path;
pTheme->DrawBackground(¶m);
}
pGraphics->RestoreGraphState();
}
void CFWL_Edit::RenderText(CFX_RenderDevice* pRenderDev,
const CFX_RectF& clipRect,
const CFX_Matrix& mt) {
ASSERT(pRenderDev);
RetainPtr<CFGAS_GEFont> font = m_EdtEngine.GetFont();
if (!font)
return;
pRenderDev->SetClip_Rect(clipRect);
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_EdtEngine.GetTextPieces()) {
// If this character is outside the clip, skip it.
if (!rtDocClip.IntersectWith(info.rtPiece))
continue;
std::vector<FXTEXT_CHARPOS> char_pos = m_EdtEngine.GetDisplayPos(info);
if (char_pos.empty())
continue;
CFDE_TextOut::DrawString(pRenderDev, m_EdtEngine.GetFontColor(), font,
char_pos.data(), char_pos.size(),
m_EdtEngine.GetFontSize(), &mt);
}
}
void CFWL_Edit::UpdateEditEngine() {
UpdateEditParams();
UpdateEditLayout();
}
void CFWL_Edit::UpdateEditParams() {
m_EdtEngine.SetAvailableWidth(m_rtEngine.width);
m_EdtEngine.SetCombText(
!!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_CombText));
m_EdtEngine.EnableValidation(
!!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_Validate));
m_EdtEngine.EnablePasswordMode(
!!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_Password));
uint32_t alignment = 0;
switch (m_pProperties->m_dwStyleExes & 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_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_HAlignModeMask) {
case FWL_STYLEEXT_EDT_Justified: {
alignment |= CFX_TxtLineAlignment_Justified;
break;
}
default:
break;
}
m_EdtEngine.SetAlignment(alignment);
bool auto_hscroll =
!!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_AutoHScroll);
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_MultiLine) {
m_EdtEngine.EnableMultiLine(true);
m_EdtEngine.EnableLineWrap(!auto_hscroll);
m_EdtEngine.LimitVerticalScroll(
(m_pProperties->m_dwStyles & FWL_WGTSTYLE_VScroll) == 0 &&
(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_AutoVScroll) == 0);
} else {
m_EdtEngine.EnableMultiLine(false);
m_EdtEngine.EnableLineWrap(false);
m_EdtEngine.LimitVerticalScroll(false);
}
m_EdtEngine.LimitHorizontalScroll(!auto_hscroll);
IFWL_ThemeProvider* theme = GetAvailableTheme();
CFWL_ThemePart part;
part.m_pWidget = this;
if (!theme) {
m_fFontSize = FWLTHEME_CAPACITY_FontSize;
return;
}
m_fFontSize = theme->GetFontSize(&part);
RetainPtr<CFGAS_GEFont> pFont = theme->GetFont(&part);
if (!pFont)
return;
m_EdtEngine.SetFont(pFont);
m_EdtEngine.SetFontColor(theme->GetTextColor(&part));
m_EdtEngine.SetFontSize(m_fFontSize);
m_EdtEngine.SetLineSpace(theme->GetLineHeight(&part));
m_EdtEngine.SetTabWidth(m_fFontSize);
m_EdtEngine.SetVisibleLineCount(m_rtEngine.height /
theme->GetLineHeight(&part));
}
void CFWL_Edit::UpdateEditLayout() {
m_EdtEngine.Layout();
}
bool CFWL_Edit::UpdateOffset() {
CFX_RectF rtCaret = m_rtCaret;
float fOffSetX = m_rtEngine.left - m_fScrollOffsetX;
float fOffSetY = m_rtEngine.top - m_fScrollOffsetY + m_fVAlignOffset;
rtCaret.Offset(fOffSetX, fOffSetY);
const CFX_RectF& edit_bounds = m_rtEngine;
if (edit_bounds.Contains(rtCaret)) {
CFX_RectF contents_bounds = m_EdtEngine.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_rtEngine.height)
m_fScrollOffsetY = 0;
return true;
}
bool CFWL_Edit::UpdateOffset(CFWL_ScrollBar* pScrollBar, float fPosChanged) {
if (pScrollBar == m_pHorzScrollBar.get())
m_fScrollOffsetX += fPosChanged;
else
m_fScrollOffsetY += fPosChanged;
return true;
}
void CFWL_Edit::UpdateVAlignment() {
float fSpaceAbove = 0.0f;
float fSpaceBelow = 0.0f;
IFWL_ThemeProvider* theme = GetAvailableTheme();
if (theme) {
CFWL_ThemePart part;
part.m_pWidget = this;
CFX_SizeF pSpace = theme->GetSpaceAboveBelow(&part);
fSpaceAbove = pSpace.width >= 0.1f ? pSpace.width : 0.0f;
fSpaceBelow = pSpace.height >= 0.1f ? pSpace.height : 0.0f;
}
float fOffsetY = 0.0f;
CFX_RectF contents_bounds = m_EdtEngine.GetContentsBoundingBox();
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_VCenter) {
fOffsetY = (m_rtEngine.height - contents_bounds.height) / 2.0f;
if (fOffsetY < (fSpaceAbove + fSpaceBelow) / 2.0f &&
fSpaceAbove < fSpaceBelow) {
return;
}
fOffsetY += (fSpaceAbove - fSpaceBelow) / 2.0f;
} else if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_VFar) {
fOffsetY = (m_rtEngine.height - contents_bounds.height);
fOffsetY -= fSpaceBelow;
} else {
fOffsetY += fSpaceAbove;
}
m_fVAlignOffset = std::max(fOffsetY, 0.0f);
}
void CFWL_Edit::UpdateCaret() {
CFX_RectF rtCaret = m_rtCaret;
rtCaret.Offset(m_rtEngine.left - m_fScrollOffsetX,
m_rtEngine.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_pProperties->m_dwStates & FWL_WGTSTATE_Focused && !rtCaret.IsEmpty())
ShowCaret(&rtCaret);
else
HideCaret(&rtCaret);
}
CFWL_ScrollBar* CFWL_Edit::UpdateScroll() {
bool bShowHorz =
m_pHorzScrollBar &&
((m_pHorzScrollBar->GetStates() & FWL_WGTSTATE_Invisible) == 0);
bool bShowVert =
m_pVertScrollBar &&
((m_pVertScrollBar->GetStates() & FWL_WGTSTATE_Invisible) == 0);
if (!bShowHorz && !bShowVert)
return nullptr;
CFX_RectF contents_bounds = m_EdtEngine.GetContentsBoundingBox();
CFWL_ScrollBar* pRepaint = nullptr;
if (bShowHorz) {
CFX_RectF rtScroll = m_pHorzScrollBar->GetWidgetRect();
if (rtScroll.width < contents_bounds.width) {
m_pHorzScrollBar->LockUpdate();
float fRange = contents_bounds.width - rtScroll.width;
m_pHorzScrollBar->SetRange(0.0f, fRange);
float fPos = pdfium::clamp(m_fScrollOffsetX, 0.0f, fRange);
m_pHorzScrollBar->SetPos(fPos);
m_pHorzScrollBar->SetTrackPos(fPos);
m_pHorzScrollBar->SetPageSize(rtScroll.width);
m_pHorzScrollBar->SetStepSize(rtScroll.width / 10);
m_pHorzScrollBar->RemoveStates(FWL_WGTSTATE_Disabled);
m_pHorzScrollBar->UnlockUpdate();
m_pHorzScrollBar->Update();
pRepaint = m_pHorzScrollBar.get();
} else if ((m_pHorzScrollBar->GetStates() & FWL_WGTSTATE_Disabled) == 0) {
m_pHorzScrollBar->LockUpdate();
m_pHorzScrollBar->SetRange(0, -1);
m_pHorzScrollBar->SetStates(FWL_WGTSTATE_Disabled);
m_pHorzScrollBar->UnlockUpdate();
m_pHorzScrollBar->Update();
pRepaint = m_pHorzScrollBar.get();
}
}
if (bShowVert) {
CFX_RectF rtScroll = m_pVertScrollBar->GetWidgetRect();
if (rtScroll.height < contents_bounds.height) {
m_pVertScrollBar->LockUpdate();
float fStep = m_EdtEngine.GetLineSpace();
float fRange =
std::max(contents_bounds.height - m_rtEngine.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_WGTSTATE_Disabled);
m_pVertScrollBar->UnlockUpdate();
m_pVertScrollBar->Update();
pRepaint = m_pVertScrollBar.get();
} else if ((m_pVertScrollBar->GetStates() & FWL_WGTSTATE_Disabled) == 0) {
m_pVertScrollBar->LockUpdate();
m_pVertScrollBar->SetRange(0, -1);
m_pVertScrollBar->SetStates(FWL_WGTSTATE_Disabled);
m_pVertScrollBar->UnlockUpdate();
m_pVertScrollBar->Update();
pRepaint = m_pVertScrollBar.get();
}
}
return pRepaint;
}
bool CFWL_Edit::IsShowScrollBar(bool bVert) {
if (!bVert)
return false;
bool bShow =
(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_ShowScrollbarFocus)
? (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) ==
FWL_WGTSTATE_Focused
: true;
return bShow && (m_pProperties->m_dwStyles & FWL_WGTSTYLE_VScroll) &&
(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_MultiLine) &&
IsContentHeightOverflow();
}
bool CFWL_Edit::IsContentHeightOverflow() {
return m_EdtEngine.GetContentsBoundingBox().height > m_rtEngine.height + 1.0f;
}
void CFWL_Edit::Layout() {
m_rtClient = GetClientRect();
m_rtEngine = m_rtClient;
IFWL_ThemeProvider* theme = GetAvailableTheme();
if (!theme)
return;
float fWidth = theme->GetScrollBarWidth();
CFWL_ThemePart part;
if (!m_pOuter) {
part.m_pWidget = this;
CFX_RectF pUIMargin = theme->GetUIMargin(&part);
m_rtEngine.Deflate(pUIMargin.left, pUIMargin.top, pUIMargin.width,
pUIMargin.height);
} else if (m_pOuter->GetClassID() == FWL_Type::DateTimePicker) {
part.m_pWidget = m_pOuter;
CFX_RectF pUIMargin = theme->GetUIMargin(&part);
m_rtEngine.Deflate(pUIMargin.left, pUIMargin.top, pUIMargin.width,
pUIMargin.height);
}
bool bShowVertScrollbar = IsShowScrollBar(true);
bool bShowHorzScrollbar = IsShowScrollBar(false);
if (bShowVertScrollbar) {
InitVerticalScrollBar();
CFX_RectF rtVertScr;
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_OuterScrollbar) {
rtVertScr = CFX_RectF(m_rtClient.right() + kEditMargin, m_rtClient.top,
fWidth, m_rtClient.height);
} else {
rtVertScr = CFX_RectF(m_rtClient.right() - fWidth, m_rtClient.top, fWidth,
m_rtClient.height);
if (bShowHorzScrollbar)
rtVertScr.height -= fWidth;
m_rtEngine.width -= fWidth;
}
m_pVertScrollBar->SetWidgetRect(rtVertScr);
m_pVertScrollBar->RemoveStates(FWL_WGTSTATE_Invisible);
m_pVertScrollBar->Update();
} else if (m_pVertScrollBar) {
m_pVertScrollBar->SetStates(FWL_WGTSTATE_Invisible);
}
if (bShowHorzScrollbar) {
InitHorizontalScrollBar();
CFX_RectF rtHoriScr;
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_OuterScrollbar) {
rtHoriScr = CFX_RectF(m_rtClient.left, m_rtClient.bottom() + kEditMargin,
m_rtClient.width, fWidth);
} else {
rtHoriScr = CFX_RectF(m_rtClient.left, m_rtClient.bottom() - fWidth,
m_rtClient.width, fWidth);
if (bShowVertScrollbar)
rtHoriScr.width -= fWidth;
m_rtEngine.height -= fWidth;
}
m_pHorzScrollBar->SetWidgetRect(rtHoriScr);
m_pHorzScrollBar->RemoveStates(FWL_WGTSTATE_Invisible);
m_pHorzScrollBar->Update();
} else if (m_pHorzScrollBar) {
m_pHorzScrollBar->SetStates(FWL_WGTSTATE_Invisible);
}
}
void CFWL_Edit::LayoutScrollBar() {
if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_ShowScrollbarFocus) ==
0) {
return;
}
bool bShowVertScrollbar = IsShowScrollBar(true);
bool bShowHorzScrollbar = IsShowScrollBar(false);
IFWL_ThemeProvider* theme = GetAvailableTheme();
float fWidth = theme ? theme->GetScrollBarWidth() : 0;
if (bShowVertScrollbar) {
if (!m_pVertScrollBar) {
InitVerticalScrollBar();
CFX_RectF rtVertScr;
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_OuterScrollbar) {
rtVertScr = CFX_RectF(m_rtClient.right() + kEditMargin, m_rtClient.top,
fWidth, m_rtClient.height);
} else {
rtVertScr = CFX_RectF(m_rtClient.right() - fWidth, m_rtClient.top,
fWidth, m_rtClient.height);
if (bShowHorzScrollbar)
rtVertScr.height -= fWidth;
}
m_pVertScrollBar->SetWidgetRect(rtVertScr);
m_pVertScrollBar->Update();
}
m_pVertScrollBar->RemoveStates(FWL_WGTSTATE_Invisible);
} else if (m_pVertScrollBar) {
m_pVertScrollBar->SetStates(FWL_WGTSTATE_Invisible);
}
if (bShowHorzScrollbar) {
if (!m_pHorzScrollBar) {
InitHorizontalScrollBar();
CFX_RectF rtHoriScr;
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_OuterScrollbar) {
rtHoriScr =
CFX_RectF(m_rtClient.left, m_rtClient.bottom() + kEditMargin,
m_rtClient.width, fWidth);
} else {
rtHoriScr = CFX_RectF(m_rtClient.left, m_rtClient.bottom() - fWidth,
m_rtClient.width, fWidth);
if (bShowVertScrollbar)
rtHoriScr.width -= (fWidth);
}
m_pHorzScrollBar->SetWidgetRect(rtHoriScr);
m_pHorzScrollBar->Update();
}
m_pHorzScrollBar->RemoveStates(FWL_WGTSTATE_Invisible);
} else if (m_pHorzScrollBar) {
m_pHorzScrollBar->SetStates(FWL_WGTSTATE_Invisible);
}
if (bShowVertScrollbar || bShowHorzScrollbar)
UpdateScroll();
}
CFX_PointF CFWL_Edit::DeviceToEngine(const CFX_PointF& pt) {
return pt + CFX_PointF(m_fScrollOffsetX - m_rtEngine.left,
m_fScrollOffsetY - m_rtEngine.top - m_fVAlignOffset);
}
void CFWL_Edit::InitVerticalScrollBar() {
if (m_pVertScrollBar)
return;
auto prop = pdfium::MakeUnique<CFWL_WidgetProperties>();
prop->m_dwStyleExes = FWL_STYLEEXT_SCB_Vert;
prop->m_dwStates = FWL_WGTSTATE_Disabled | FWL_WGTSTATE_Invisible;
prop->m_pParent = this;
prop->m_pThemeProvider = m_pProperties->m_pThemeProvider;
m_pVertScrollBar = pdfium::MakeUnique<CFWL_ScrollBar>(m_pOwnerApp.Get(),
std::move(prop), this);
}
void CFWL_Edit::InitHorizontalScrollBar() {
if (m_pHorzScrollBar)
return;
auto prop = pdfium::MakeUnique<CFWL_WidgetProperties>();
prop->m_dwStyleExes = FWL_STYLEEXT_SCB_Horz;
prop->m_dwStates = FWL_WGTSTATE_Disabled | FWL_WGTSTATE_Invisible;
prop->m_pParent = this;
prop->m_pThemeProvider = m_pProperties->m_pThemeProvider;
m_pHorzScrollBar = pdfium::MakeUnique<CFWL_ScrollBar>(m_pOwnerApp.Get(),
std::move(prop), this);
}
void CFWL_Edit::ShowCaret(CFX_RectF* pRect) {
if (m_pCaret) {
m_pCaret->ShowCaret();
if (!pRect->IsEmpty())
m_pCaret->SetWidgetRect(*pRect);
RepaintRect(m_rtEngine);
return;
}
CFWL_Widget* pOuter = this;
pRect->Offset(m_pProperties->m_rtWidget.left, m_pProperties->m_rtWidget.top);
while (pOuter->GetOuter()) {
pOuter = pOuter->GetOuter();
CFX_RectF rtOuter = pOuter->GetWidgetRect();
pRect->Offset(rtOuter.left, rtOuter.top);
}
CXFA_FFWidget* pXFAWidget = pOuter->GetLayoutItem();
if (!pXFAWidget)
return;
IXFA_DocEnvironment* pDocEnvironment =
pXFAWidget->GetDoc()->GetDocEnvironment();
if (!pDocEnvironment)
return;
CFX_RectF rt = pXFAWidget->GetRotateMatrix().TransformRect(*pRect);
pDocEnvironment->DisplayCaret(pXFAWidget, true, &rt);
}
void CFWL_Edit::HideCaret(CFX_RectF* pRect) {
if (m_pCaret) {
m_pCaret->HideCaret();
RepaintRect(m_rtEngine);
return;
}
CFWL_Widget* pOuter = this;
while (pOuter->GetOuter())
pOuter = pOuter->GetOuter();
CXFA_FFWidget* pXFAWidget = pOuter->GetLayoutItem();
if (!pXFAWidget)
return;
IXFA_DocEnvironment* pDocEnvironment =
pXFAWidget->GetDoc()->GetDocEnvironment();
if (!pDocEnvironment)
return;
pDocEnvironment->DisplayCaret(pXFAWidget, false, pRect);
}
bool CFWL_Edit::ValidateNumberChar(wchar_t cNum) {
if (!m_bSetRange)
return true;
WideString wsText = m_EdtEngine.GetText();
if (wsText.IsEmpty())
return cNum != L'0';
if (HasSelection())
return wsText.GetInteger() <= m_iMax;
if (cNum == L'0' && m_CursorPosition == 0)
return false;
int32_t nLen = wsText.GetLength();
WideString l = wsText.Left(m_CursorPosition);
WideString r = wsText.Right(nLen - m_CursorPosition);
WideString wsNew = l + cNum + r;
return wsNew.GetInteger() <= m_iMax;
}
void CFWL_Edit::InitCaret() {
m_pCaret.reset();
m_rtCaret = CFX_RectF();
}
void CFWL_Edit::UpdateCursorRect() {
int32_t bidi_level = 0;
m_rtCaret = CFX_RectF();
std::tie(bidi_level, m_rtCaret) =
m_EdtEngine.GetCharacterInfo(m_CursorPosition);
// TODO(dsinclair): This should handle bidi level ...
if (m_rtCaret.width == 0 && m_rtCaret.left > 1.0f)
m_rtCaret.left -= 1.0f;
m_rtCaret.width = 1.0f;
}
void CFWL_Edit::SetCursorPosition(size_t position) {
if (m_CursorPosition == position)
return;
m_CursorPosition = position;
UpdateCursorRect();
OnCaretChanged();
}
void CFWL_Edit::OnProcessMessage(CFWL_Message* pMessage) {
if (!pMessage)
return;
switch (pMessage->GetType()) {
case CFWL_Message::Type::SetFocus:
OnFocusChanged(pMessage, true);
break;
case CFWL_Message::Type::KillFocus:
OnFocusChanged(pMessage, false);
break;
case CFWL_Message::Type::Mouse: {
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;
case FWL_MouseCommand::LeftButtonDblClk:
OnButtonDoubleClick(pMsg);
break;
case FWL_MouseCommand::Move:
OnMouseMove(pMsg);
break;
case FWL_MouseCommand::RightButtonDown:
DoRButtonDown(pMsg);
break;
default:
break;
}
break;
}
case CFWL_Message::Type::Key: {
CFWL_MessageKey* pKey = static_cast<CFWL_MessageKey*>(pMessage);
if (pKey->m_dwCmd == FWL_KeyCommand::KeyDown)
OnKeyDown(pKey);
else if (pKey->m_dwCmd == FWL_KeyCommand::Char)
OnChar(pKey);
break;
}
default:
break;
}
CFWL_Widget::OnProcessMessage(pMessage);
}
void CFWL_Edit::OnProcessEvent(CFWL_Event* pEvent) {
if (!pEvent || pEvent->GetType() != CFWL_Event::Type::Scroll)
return;
CFWL_Widget* pSrcTarget = pEvent->m_pSrcTarget;
if ((pSrcTarget == m_pVertScrollBar.get() && m_pVertScrollBar) ||
(pSrcTarget == m_pHorzScrollBar.get() && m_pHorzScrollBar)) {
CFWL_EventScroll* pScrollEvent = static_cast<CFWL_EventScroll*>(pEvent);
OnScroll(static_cast<CFWL_ScrollBar*>(pSrcTarget),
pScrollEvent->m_iScrollCode, pScrollEvent->m_fPos);
}
}
void CFWL_Edit::OnDrawWidget(CXFA_Graphics* pGraphics,
const CFX_Matrix& matrix) {
DrawWidget(pGraphics, matrix);
}
void CFWL_Edit::DoRButtonDown(CFWL_MessageMouse* pMsg) {
if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)
SetFocus(true);
m_CursorPosition = m_EdtEngine.GetIndexForPoint(DeviceToEngine(pMsg->m_pos));
}
void CFWL_Edit::OnFocusChanged(CFWL_Message* pMsg, bool bSet) {
bool bRepaint = false;
if (bSet) {
m_pProperties->m_dwStates |= FWL_WGTSTATE_Focused;
UpdateVAlignment();
UpdateOffset();
UpdateCaret();
} else if (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) {
m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
HideCaret(nullptr);
if (HasSelection()) {
ClearSelection();
bRepaint = true;
}
UpdateOffset();
}
LayoutScrollBar();
if (!bRepaint)
return;
CFX_RectF rtInvalidate(0, 0, m_pProperties->m_rtWidget.width,
m_pProperties->m_rtWidget.height);
RepaintRect(rtInvalidate);
}
void CFWL_Edit::OnLButtonDown(CFWL_MessageMouse* pMsg) {
if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
return;
m_bLButtonDown = true;
SetGrab(true);
if ((m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0)
SetFocus(true);
bool bRepaint = false;
if (m_EdtEngine.HasSelection()) {
m_EdtEngine.ClearSelection();
bRepaint = true;
}
size_t index_at_click =
m_EdtEngine.GetIndexForPoint(DeviceToEngine(pMsg->m_pos));
if (index_at_click != m_CursorPosition &&
!!(pMsg->m_dwFlags & FWL_KEYFLAG_Shift)) {
size_t start = std::min(m_CursorPosition, index_at_click);
size_t end = std::max(m_CursorPosition, index_at_click);
m_EdtEngine.SetSelection(start, end - start);
bRepaint = true;
} else {
m_CursorPosition = index_at_click;
}
if (bRepaint)
RepaintRect(m_rtEngine);
}
void CFWL_Edit::OnLButtonUp(CFWL_MessageMouse* pMsg) {
m_bLButtonDown = false;
SetGrab(false);
}
void CFWL_Edit::OnButtonDoubleClick(CFWL_MessageMouse* pMsg) {
size_t click_idx = m_EdtEngine.GetIndexForPoint(DeviceToEngine(pMsg->m_pos));
size_t start_idx;
size_t count;
std::tie(start_idx, count) = m_EdtEngine.BoundsForWordAt(click_idx);
m_EdtEngine.SetSelection(start_idx, count);
m_CursorPosition = start_idx + count;
RepaintRect(m_rtEngine);
}
void CFWL_Edit::OnMouseMove(CFWL_MessageMouse* pMsg) {
bool shift = !!(pMsg->m_dwFlags & FWL_KEYFLAG_Shift);
if (!m_bLButtonDown || !shift)
return;
size_t old_cursor_pos = m_CursorPosition;
SetCursorPosition(m_EdtEngine.GetIndexForPoint(DeviceToEngine(pMsg->m_pos)));
if (old_cursor_pos == m_CursorPosition)
return;
size_t length = m_EdtEngine.GetLength();
if (m_CursorPosition > length)
SetCursorPosition(length);
size_t sel_start = 0;
size_t count = 0;
if (m_EdtEngine.HasSelection())
std::tie(sel_start, count) = m_EdtEngine.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_EdtEngine.SetSelection(start_pos, end_pos - start_pos);
}
void CFWL_Edit::OnKeyDown(CFWL_MessageKey* pMsg) {
bool bShift = !!(pMsg->m_dwFlags & FWL_KEYFLAG_Shift);
bool bCtrl = !!(pMsg->m_dwFlags & FWL_KEYFLAG_Ctrl);
size_t sel_start = m_CursorPosition;
if (m_EdtEngine.HasSelection()) {
size_t start_idx;
size_t count;
std::tie(start_idx, count) = m_EdtEngine.GetSelection();
sel_start = start_idx;
}
switch (pMsg->m_dwKeyCode) {
case FWL_VKEY_Left:
SetCursorPosition(m_EdtEngine.GetIndexLeft(m_CursorPosition));
break;
case FWL_VKEY_Right:
SetCursorPosition(m_EdtEngine.GetIndexRight(m_CursorPosition));
break;
case FWL_VKEY_Up:
SetCursorPosition(m_EdtEngine.GetIndexUp(m_CursorPosition));
break;
case FWL_VKEY_Down:
SetCursorPosition(m_EdtEngine.GetIndexDown(m_CursorPosition));
break;
case FWL_VKEY_Home:
SetCursorPosition(
bCtrl ? 0 : m_EdtEngine.GetIndexAtStartOfLine(m_CursorPosition));
break;
case FWL_VKEY_End:
SetCursorPosition(
bCtrl ? m_EdtEngine.GetLength()
: m_EdtEngine.GetIndexAtEndOfLine(m_CursorPosition));
break;
case FWL_VKEY_Delete: {
if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_ReadOnly) ||
(m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)) {
break;
}
if (m_CursorPosition > 0) {
SetCursorPosition(m_EdtEngine.GetIndexBefore(m_CursorPosition));
m_EdtEngine.Delete(m_CursorPosition, 1);
}
break;
}
case FWL_VKEY_Insert:
case FWL_VKEY_F2:
case FWL_VKEY_Tab:
default:
break;
}
// Update the selection.
if (bShift && sel_start != m_CursorPosition) {
m_EdtEngine.SetSelection(std::min(sel_start, m_CursorPosition),
std::max(sel_start, m_CursorPosition));
RepaintRect(m_rtEngine);
}
}
void CFWL_Edit::OnChar(CFWL_MessageKey* pMsg) {
if ((m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_ReadOnly) ||
(m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)) {
return;
}
wchar_t c = static_cast<wchar_t>(pMsg->m_dwKeyCode);
switch (c) {
case FWL_VKEY_Back:
if (m_CursorPosition > 0) {
SetCursorPosition(m_EdtEngine.GetIndexBefore(m_CursorPosition));
m_EdtEngine.Delete(m_CursorPosition, 1);
}
break;
case FWL_VKEY_NewLine:
case FWL_VKEY_Escape:
break;
case FWL_VKEY_Tab:
m_EdtEngine.Insert(m_CursorPosition, L"\t");
SetCursorPosition(m_CursorPosition + 1);
break;
case FWL_VKEY_Return:
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_WantReturn) {
m_EdtEngine.Insert(m_CursorPosition, L"\n");
SetCursorPosition(m_CursorPosition + 1);
}
break;
default: {
if (!m_pWidgetMgr->IsFormDisabled()) {
if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_Number) {
if (((pMsg->m_dwKeyCode < FWL_VKEY_0) &&
(pMsg->m_dwKeyCode != 0x2E && pMsg->m_dwKeyCode != 0x2D)) ||
pMsg->m_dwKeyCode > FWL_VKEY_9) {
break;
}
if (!ValidateNumberChar(c))
break;
}
}
if (pMsg->m_dwFlags & kEditingModifier)
break;
m_EdtEngine.Insert(m_CursorPosition, WideString(c));
SetCursorPosition(m_CursorPosition + 1);
break;
}
}
}
bool CFWL_Edit::OnScroll(CFWL_ScrollBar* pScrollBar,
CFWL_EventScroll::Code dwCode,
float fPos) {
CFX_SizeF fs;
pScrollBar->GetRange(&fs.width, &fs.height);
float iCurPos = pScrollBar->GetPos();
float fStep = pScrollBar->GetStepSize();
switch (dwCode) {
case CFWL_EventScroll::Code::Min: {
fPos = fs.width;
break;
}
case CFWL_EventScroll::Code::Max: {
fPos = fs.height;
break;
}
case CFWL_EventScroll::Code::StepBackward: {
fPos -= fStep;
if (fPos < fs.width + fStep / 2) {
fPos = fs.width;
}
break;
}
case CFWL_EventScroll::Code::StepForward: {
fPos += fStep;
if (fPos > fs.height - fStep / 2) {
fPos = fs.height;
}
break;
}
case CFWL_EventScroll::Code::PageBackward: {
fPos -= pScrollBar->GetPageSize();
if (fPos < fs.width) {
fPos = fs.width;
}
break;
}
case CFWL_EventScroll::Code::PageForward: {
fPos += pScrollBar->GetPageSize();
if (fPos > fs.height) {
fPos = fs.height;
}
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;
}