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Editor.cxx
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Editor.cxx
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// Scintilla source code edit control
/** @file Editor.cxx
** Main code for the edit control.
**/
// Copyright 1998-2004 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include "Platform.h"
#ifndef PLAT_QT
#define INCLUDE_DEPRECATED_FEATURES
#endif
#include "Scintilla.h"
#include "ContractionState.h"
#include "SVector.h"
#include "CellBuffer.h"
#include "KeyMap.h"
#include "Indicator.h"
#include "XPM.h"
#include "LineMarker.h"
#include "Style.h"
#include "ViewStyle.h"
#include "CharClassify.h"
#include "Document.h"
#include "Editor.h"
/*
return whether this modification represents an operation that
may reasonably be deferred (not done now OR [possibly] at all)
*/
static bool CanDeferToLastStep(const DocModification& mh) {
if (mh.modificationType & (SC_MOD_BEFOREINSERT|SC_MOD_BEFOREDELETE))
return true; // CAN skip
if (!(mh.modificationType & (SC_PERFORMED_UNDO|SC_PERFORMED_REDO)))
return false; // MUST do
if (mh.modificationType & SC_MULTISTEPUNDOREDO)
return true; // CAN skip
return false; // PRESUMABLY must do
}
static bool CanEliminate(const DocModification& mh) {
return
(mh.modificationType & (SC_MOD_BEFOREINSERT|SC_MOD_BEFOREDELETE)) != 0;
}
/*
return whether this modification represents the FINAL step
in a [possibly lengthy] multi-step Undo/Redo sequence
*/
static bool IsLastStep(const DocModification& mh) {
return
(mh.modificationType & (SC_PERFORMED_UNDO|SC_PERFORMED_REDO)) != 0
&& (mh.modificationType & SC_MULTISTEPUNDOREDO) != 0
&& (mh.modificationType & SC_LASTSTEPINUNDOREDO) != 0
&& (mh.modificationType & SC_MULTILINEUNDOREDO) != 0;
}
Caret::Caret() :
active(false), on(false), period(500) {}
Timer::Timer() :
ticking(false), ticksToWait(0), tickerID(0) {}
Idler::Idler() :
state(false), idlerID(0) {}
LineLayout::LineLayout(int maxLineLength_) :
lineStarts(0),
lenLineStarts(0),
lineNumber(-1),
inCache(false),
maxLineLength(-1),
numCharsInLine(0),
validity(llInvalid),
xHighlightGuide(0),
highlightColumn(0),
selStart(0),
selEnd(0),
containsCaret(false),
edgeColumn(0),
chars(0),
styles(0),
styleBitsSet(0),
indicators(0),
positions(0),
hsStart(0),
hsEnd(0),
widthLine(wrapWidthInfinite),
lines(1) {
Resize(maxLineLength_);
}
LineLayout::~LineLayout() {
Free();
}
void LineLayout::Resize(int maxLineLength_) {
if (maxLineLength_ > maxLineLength) {
Free();
chars = new char[maxLineLength_ + 1];
styles = new unsigned char[maxLineLength_ + 1];
indicators = new char[maxLineLength_ + 1];
// Extra position allocated as sometimes the Windows
// GetTextExtentExPoint API writes an extra element.
positions = new int[maxLineLength_ + 1 + 1];
maxLineLength = maxLineLength_;
}
}
void LineLayout::Free() {
delete []chars;
chars = 0;
delete []styles;
styles = 0;
delete []indicators;
indicators = 0;
delete []positions;
positions = 0;
delete []lineStarts;
lineStarts = 0;
}
void LineLayout::Invalidate(validLevel validity_) {
if (validity > validity_)
validity = validity_;
}
void LineLayout::SetLineStart(int line, int start) {
if ((line >= lenLineStarts) && (line != 0)) {
int newMaxLines = line + 20;
int *newLineStarts = new int[newMaxLines];
if (!newLineStarts)
return;
for (int i = 0; i < newMaxLines; i++) {
if (i < lenLineStarts)
newLineStarts[i] = lineStarts[i];
else
newLineStarts[i] = 0;
}
delete []lineStarts;
lineStarts = newLineStarts;
lenLineStarts = newMaxLines;
}
lineStarts[line] = start;
}
void LineLayout::SetBracesHighlight(Range rangeLine, Position braces[],
char bracesMatchStyle, int xHighlight) {
if (rangeLine.ContainsCharacter(braces[0])) {
int braceOffset = braces[0] - rangeLine.start;
if (braceOffset < numCharsInLine) {
bracePreviousStyles[0] = styles[braceOffset];
styles[braceOffset] = bracesMatchStyle;
}
}
if (rangeLine.ContainsCharacter(braces[1])) {
int braceOffset = braces[1] - rangeLine.start;
if (braceOffset < numCharsInLine) {
bracePreviousStyles[1] = styles[braceOffset];
styles[braceOffset] = bracesMatchStyle;
}
}
if ((braces[0] >= rangeLine.start && braces[1] <= rangeLine.end) ||
(braces[1] >= rangeLine.start && braces[0] <= rangeLine.end)) {
xHighlightGuide = xHighlight;
}
}
void LineLayout::RestoreBracesHighlight(Range rangeLine, Position braces[]) {
if (rangeLine.ContainsCharacter(braces[0])) {
int braceOffset = braces[0] - rangeLine.start;
if (braceOffset < numCharsInLine) {
styles[braceOffset] = bracePreviousStyles[0];
}
}
if (rangeLine.ContainsCharacter(braces[1])) {
int braceOffset = braces[1] - rangeLine.start;
if (braceOffset < numCharsInLine) {
styles[braceOffset] = bracePreviousStyles[1];
}
}
xHighlightGuide = 0;
}
LineLayoutCache::LineLayoutCache() :
level(0), length(0), size(0), cache(0),
allInvalidated(false), styleClock(-1), useCount(0) {
Allocate(0);
}
LineLayoutCache::~LineLayoutCache() {
Deallocate();
}
void LineLayoutCache::Allocate(int length_) {
PLATFORM_ASSERT(cache == NULL);
allInvalidated = false;
length = length_;
size = length;
if (size > 1) {
size = (size / 16 + 1) * 16;
}
if (size > 0) {
cache = new LineLayout * [size];
}
for (int i = 0; i < size; i++)
cache[i] = 0;
}
void LineLayoutCache::AllocateForLevel(int linesOnScreen, int linesInDoc) {
PLATFORM_ASSERT(useCount == 0);
int lengthForLevel = 0;
if (level == llcCaret) {
lengthForLevel = 1;
} else if (level == llcPage) {
lengthForLevel = linesOnScreen + 1;
} else if (level == llcDocument) {
lengthForLevel = linesInDoc;
}
if (lengthForLevel > size) {
Deallocate();
Allocate(lengthForLevel);
} else {
if (lengthForLevel < length) {
for (int i = lengthForLevel; i < length; i++) {
delete cache[i];
cache[i] = 0;
}
}
length = lengthForLevel;
}
PLATFORM_ASSERT(length == lengthForLevel);
PLATFORM_ASSERT(cache != NULL || length == 0);
}
void LineLayoutCache::Deallocate() {
PLATFORM_ASSERT(useCount == 0);
for (int i = 0; i < length; i++)
delete cache[i];
delete []cache;
cache = 0;
length = 0;
size = 0;
}
void LineLayoutCache::Invalidate(LineLayout::validLevel validity_) {
if (cache && !allInvalidated) {
for (int i = 0; i < length; i++) {
if (cache[i]) {
cache[i]->Invalidate(validity_);
}
}
if (validity_ == LineLayout::llInvalid) {
allInvalidated = true;
}
}
}
void LineLayoutCache::SetLevel(int level_) {
allInvalidated = false;
if ((level_ != -1) && (level != level_)) {
level = level_;
Deallocate();
}
}
LineLayout *LineLayoutCache::Retrieve(int lineNumber, int lineCaret, int maxChars, int styleClock_,
int linesOnScreen, int linesInDoc) {
AllocateForLevel(linesOnScreen, linesInDoc);
if (styleClock != styleClock_) {
Invalidate(LineLayout::llCheckTextAndStyle);
styleClock = styleClock_;
}
allInvalidated = false;
int pos = -1;
LineLayout *ret = 0;
if (level == llcCaret) {
pos = 0;
} else if (level == llcPage) {
if (lineNumber == lineCaret) {
pos = 0;
} else if (length > 1) {
pos = 1 + (lineNumber % (length - 1));
}
} else if (level == llcDocument) {
pos = lineNumber;
}
if (pos >= 0) {
PLATFORM_ASSERT(useCount == 0);
if (cache && (pos < length)) {
if (cache[pos]) {
if ((cache[pos]->lineNumber != lineNumber) ||
(cache[pos]->maxLineLength < maxChars)) {
delete cache[pos];
cache[pos] = 0;
}
}
if (!cache[pos]) {
cache[pos] = new LineLayout(maxChars);
}
if (cache[pos]) {
cache[pos]->lineNumber = lineNumber;
cache[pos]->inCache = true;
ret = cache[pos];
useCount++;
}
}
}
if (!ret) {
ret = new LineLayout(maxChars);
ret->lineNumber = lineNumber;
}
return ret;
}
void LineLayoutCache::Dispose(LineLayout *ll) {
allInvalidated = false;
if (ll) {
if (!ll->inCache) {
delete ll;
} else {
useCount--;
}
}
}
Editor::Editor() {
ctrlID = 0;
stylesValid = false;
printMagnification = 0;
printColourMode = SC_PRINT_NORMAL;
printWrapState = eWrapWord;
cursorMode = SC_CURSORNORMAL;
controlCharSymbol = 0; /* Draw the control characters */
hasFocus = false;
hideSelection = false;
inOverstrike = false;
errorStatus = 0;
mouseDownCaptures = true;
bufferedDraw = true;
twoPhaseDraw = true;
lastClickTime = 0;
dwellDelay = SC_TIME_FOREVER;
ticksToDwell = SC_TIME_FOREVER;
dwelling = false;
ptMouseLast.x = 0;
ptMouseLast.y = 0;
inDragDrop = false;
dropWentOutside = false;
posDrag = invalidPosition;
posDrop = invalidPosition;
selectionType = selChar;
lastXChosen = 0;
lineAnchor = 0;
originalAnchorPos = 0;
selType = selStream;
moveExtendsSelection = false;
xStartSelect = 0;
xEndSelect = 0;
primarySelection = true;
caretXPolicy = CARET_SLOP | CARET_EVEN;
caretXSlop = 50;
caretYPolicy = CARET_EVEN;
caretYSlop = 0;
searchAnchor = 0;
xOffset = 0;
xCaretMargin = 50;
horizontalScrollBarVisible = true;
scrollWidth = 2000;
verticalScrollBarVisible = true;
endAtLastLine = true;
caretSticky = false;
pixmapLine = Surface::Allocate();
pixmapSelMargin = Surface::Allocate();
pixmapSelPattern = Surface::Allocate();
pixmapIndentGuide = Surface::Allocate();
pixmapIndentGuideHighlight = Surface::Allocate();
currentPos = 0;
anchor = 0;
targetStart = 0;
targetEnd = 0;
searchFlags = 0;
topLine = 0;
posTopLine = 0;
lengthForEncode = -1;
needUpdateUI = true;
braces[0] = invalidPosition;
braces[1] = invalidPosition;
bracesMatchStyle = STYLE_BRACEBAD;
highlightGuideColumn = 0;
theEdge = 0;
paintState = notPainting;
modEventMask = SC_MODEVENTMASKALL;
pdoc = new Document();
pdoc->AddRef();
pdoc->AddWatcher(this, 0);
recordingMacro = false;
foldFlags = 0;
wrapState = eWrapNone;
wrapWidth = LineLayout::wrapWidthInfinite;
wrapStart = wrapLineLarge;
wrapEnd = wrapLineLarge;
wrapVisualFlags = 0;
wrapVisualFlagsLocation = 0;
wrapVisualStartIndent = 0;
actualWrapVisualStartIndent = 0;
convertPastes = true;
hsStart = -1;
hsEnd = -1;
llc.SetLevel(LineLayoutCache::llcCaret);
}
Editor::~Editor() {
pdoc->RemoveWatcher(this, 0);
pdoc->Release();
pdoc = 0;
DropGraphics();
delete pixmapLine;
delete pixmapSelMargin;
delete pixmapSelPattern;
delete pixmapIndentGuide;
delete pixmapIndentGuideHighlight;
}
void Editor::Finalise() {
SetIdle(false);
CancelModes();
}
void Editor::DropGraphics() {
pixmapLine->Release();
pixmapSelMargin->Release();
pixmapSelPattern->Release();
pixmapIndentGuide->Release();
pixmapIndentGuideHighlight->Release();
}
void Editor::InvalidateStyleData() {
stylesValid = false;
palette.Release();
DropGraphics();
llc.Invalidate(LineLayout::llInvalid);
if (selType == selRectangle) {
xStartSelect = XFromPosition(anchor);
xEndSelect = XFromPosition(currentPos);
}
}
void Editor::InvalidateStyleRedraw() {
NeedWrapping();
InvalidateStyleData();
Redraw();
}
void Editor::RefreshColourPalette(Palette &pal, bool want) {
vs.RefreshColourPalette(pal, want);
}
void Editor::RefreshStyleData() {
if (!stylesValid) {
stylesValid = true;
AutoSurface surface(this);
if (surface) {
vs.Refresh(*surface);
RefreshColourPalette(palette, true);
palette.Allocate(wMain);
RefreshColourPalette(palette, false);
}
SetScrollBars();
}
}
PRectangle Editor::GetClientRectangle() {
return wMain.GetClientPosition();
}
PRectangle Editor::GetTextRectangle() {
PRectangle rc = GetClientRectangle();
rc.left += vs.fixedColumnWidth;
rc.right -= vs.rightMarginWidth;
return rc;
}
int Editor::LinesOnScreen() {
PRectangle rcClient = GetClientRectangle();
int htClient = rcClient.bottom - rcClient.top;
//Platform::DebugPrintf("lines on screen = %d\n", htClient / lineHeight + 1);
return htClient / vs.lineHeight;
}
int Editor::LinesToScroll() {
int retVal = LinesOnScreen() - 1;
if (retVal < 1)
return 1;
else
return retVal;
}
int Editor::MaxScrollPos() {
//Platform::DebugPrintf("Lines %d screen = %d maxScroll = %d\n",
//LinesTotal(), LinesOnScreen(), LinesTotal() - LinesOnScreen() + 1);
int retVal = cs.LinesDisplayed();
if (endAtLastLine) {
retVal -= LinesOnScreen();
} else {
retVal--;
}
if (retVal < 0) {
return 0;
} else {
return retVal;
}
}
static inline bool IsControlCharacter(int ch) {
// iscntrl returns true for lots of chars > 127 which are displayable
return ch >= 0 && ch < ' ';
}
const char *ControlCharacterString(unsigned char ch) {
const char *reps[] = {
"NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL",
"BS", "HT", "LF", "VT", "FF", "CR", "SO", "SI",
"DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB",
"CAN", "EM", "SUB", "ESC", "FS", "GS", "RS", "US"
};
if (ch < (sizeof(reps) / sizeof(reps[0]))) {
return reps[ch];
} else {
return "BAD";
}
}
/**
* Convenience class to ensure LineLayout objects are always disposed.
*/
class AutoLineLayout {
LineLayoutCache &llc;
LineLayout *ll;
AutoLineLayout &operator=(const AutoLineLayout &) { return * this; }
public:
AutoLineLayout(LineLayoutCache &llc_, LineLayout *ll_) : llc(llc_), ll(ll_) {}
~AutoLineLayout() {
llc.Dispose(ll);
ll = 0;
}
LineLayout *operator->() const {
return ll;
}
operator LineLayout *() const {
return ll;
}
void Set(LineLayout *ll_) {
llc.Dispose(ll);
ll = ll_;
}
};
/**
* Allows to iterate through the lines of a selection.
* Althought it can be called for a stream selection, in most cases
* it is inefficient and it should be used only for
* a rectangular or a line selection.
*/
class SelectionLineIterator {
private:
Editor *ed;
int line; ///< Current line within the iteration.
bool forward; ///< True if iterating by increasing line number, false otherwise.
int selStart, selEnd; ///< Positions of the start and end of the selection relative to the start of the document.
int minX, maxX; ///< Left and right of selection rectangle.
public:
int lineStart, lineEnd; ///< Line numbers, first and last lines of the selection.
int startPos, endPos; ///< Positions of the beginning and end of the selection on the current line.
void Reset() {
if (forward) {
line = lineStart;
} else {
line = lineEnd;
}
}
SelectionLineIterator(Editor *ed_, bool forward_ = true) : line(0), startPos(0), endPos(0) {
ed = ed_;
forward = forward_;
selStart = ed->SelectionStart();
selEnd = ed->SelectionEnd();
lineStart = ed->pdoc->LineFromPosition(selStart);
lineEnd = ed->pdoc->LineFromPosition(selEnd);
// Left of rectangle
minX = Platform::Minimum(ed->xStartSelect, ed->xEndSelect);
// Right of rectangle
maxX = Platform::Maximum(ed->xStartSelect, ed->xEndSelect);
Reset();
}
~SelectionLineIterator() {}
void SetAt(int line) {
if (line < lineStart || line > lineEnd) {
startPos = endPos = INVALID_POSITION;
} else {
if (ed->selType == ed->selRectangle) {
// Measure line and return character closest to minX
startPos = ed->PositionFromLineX(line, minX);
// Measure line and return character closest to maxX
endPos = ed->PositionFromLineX(line, maxX);
} else if (ed->selType == ed->selLines) {
startPos = ed->pdoc->LineStart(line);
endPos = ed->pdoc->LineStart(line + 1);
} else { // Stream selection, here only for completion
if (line == lineStart) {
startPos = selStart;
} else {
startPos = ed->pdoc->LineStart(line);
}
if (line == lineEnd) {
endPos = selEnd;
} else {
endPos = ed->pdoc->LineStart(line + 1);
}
}
}
}
bool Iterate() {
SetAt(line);
if (forward) {
line++;
} else {
line--;
}
return startPos != INVALID_POSITION;
}
};
Point Editor::LocationFromPosition(int pos) {
Point pt;
RefreshStyleData();
if (pos == INVALID_POSITION)
return pt;
int line = pdoc->LineFromPosition(pos);
int lineVisible = cs.DisplayFromDoc(line);
//Platform::DebugPrintf("line=%d\n", line);
AutoSurface surface(this);
AutoLineLayout ll(llc, RetrieveLineLayout(line));
if (surface && ll) {
// -1 because of adding in for visible lines in following loop.
pt.y = (lineVisible - topLine - 1) * vs.lineHeight;
pt.x = 0;
unsigned int posLineStart = pdoc->LineStart(line);
LayoutLine(line, surface, vs, ll, wrapWidth);
int posInLine = pos - posLineStart;
// In case of very long line put x at arbitrary large position
if (posInLine > ll->maxLineLength) {
pt.x = ll->positions[ll->maxLineLength] - ll->positions[ll->LineStart(ll->lines)];
}
for (int subLine = 0; subLine < ll->lines; subLine++) {
if ((posInLine >= ll->LineStart(subLine)) && (posInLine <= ll->LineStart(subLine + 1))) {
pt.x = ll->positions[posInLine] - ll->positions[ll->LineStart(subLine)];
if (actualWrapVisualStartIndent != 0) {
int lineStart = ll->LineStart(subLine);
if (lineStart != 0) // Wrapped
pt.x += actualWrapVisualStartIndent * vs.aveCharWidth;
}
}
if (posInLine >= ll->LineStart(subLine)) {
pt.y += vs.lineHeight;
}
}
pt.x += vs.fixedColumnWidth - xOffset;
}
return pt;
}
int Editor::XFromPosition(int pos) {
Point pt = LocationFromPosition(pos);
return pt.x - vs.fixedColumnWidth + xOffset;
}
int Editor::LineFromLocation(Point pt) {
return cs.DocFromDisplay(pt.y / vs.lineHeight + topLine);
}
void Editor::SetTopLine(int topLineNew) {
topLine = topLineNew;
posTopLine = pdoc->LineStart(cs.DocFromDisplay(topLine));
}
static inline bool IsEOLChar(char ch) {
return (ch == '\r') || (ch == '\n');
}
int Editor::PositionFromLocation(Point pt) {
RefreshStyleData();
pt.x = pt.x - vs.fixedColumnWidth + xOffset;
int visibleLine = pt.y / vs.lineHeight + topLine;
if (pt.y < 0) { // Division rounds towards 0
visibleLine = (pt.y - (vs.lineHeight - 1)) / vs.lineHeight + topLine;
}
if (visibleLine < 0)
visibleLine = 0;
int lineDoc = cs.DocFromDisplay(visibleLine);
if (lineDoc >= pdoc->LinesTotal())
return pdoc->Length();
unsigned int posLineStart = pdoc->LineStart(lineDoc);
int retVal = posLineStart;
AutoSurface surface(this);
AutoLineLayout ll(llc, RetrieveLineLayout(lineDoc));
if (surface && ll) {
LayoutLine(lineDoc, surface, vs, ll, wrapWidth);
int lineStartSet = cs.DisplayFromDoc(lineDoc);
int subLine = visibleLine - lineStartSet;
if (subLine < ll->lines) {
int lineStart = ll->LineStart(subLine);
int lineEnd = ll->LineStart(subLine + 1);
int subLineStart = ll->positions[lineStart];
if (actualWrapVisualStartIndent != 0) {
if (lineStart != 0) // Wrapped
pt.x -= actualWrapVisualStartIndent * vs.aveCharWidth;
}
for (int i = lineStart; i < lineEnd; i++) {
if (pt.x < (((ll->positions[i] + ll->positions[i + 1]) / 2) - subLineStart) ||
IsEOLChar(ll->chars[i])) {
return pdoc->MovePositionOutsideChar(i + posLineStart, 1);
}
}
return lineEnd + posLineStart;
}
retVal = ll->numCharsInLine + posLineStart;
}
return retVal;
}
// Like PositionFromLocation but INVALID_POSITION returned when not near any text.
int Editor::PositionFromLocationClose(Point pt) {
RefreshStyleData();
PRectangle rcClient = GetTextRectangle();
if (!rcClient.Contains(pt))
return INVALID_POSITION;
if (pt.x < vs.fixedColumnWidth)
return INVALID_POSITION;
if (pt.y < 0)
return INVALID_POSITION;
pt.x = pt.x - vs.fixedColumnWidth + xOffset;
int visibleLine = pt.y / vs.lineHeight + topLine;
if (pt.y < 0) { // Division rounds towards 0
visibleLine = (pt.y - (vs.lineHeight - 1)) / vs.lineHeight + topLine;
}
int lineDoc = cs.DocFromDisplay(visibleLine);
if (lineDoc < 0)
return INVALID_POSITION;
if (lineDoc >= pdoc->LinesTotal())
return INVALID_POSITION;
AutoSurface surface(this);
AutoLineLayout ll(llc, RetrieveLineLayout(lineDoc));
if (surface && ll) {
LayoutLine(lineDoc, surface, vs, ll, wrapWidth);
unsigned int posLineStart = pdoc->LineStart(lineDoc);
int lineStartSet = cs.DisplayFromDoc(lineDoc);
int subLine = visibleLine - lineStartSet;
if (subLine < ll->lines) {
int lineStart = ll->LineStart(subLine);
int lineEnd = ll->LineStart(subLine + 1);
int subLineStart = ll->positions[lineStart];
if (actualWrapVisualStartIndent != 0) {
if (lineStart != 0) // Wrapped
pt.x -= actualWrapVisualStartIndent * vs.aveCharWidth;
}
for (int i = lineStart; i < lineEnd; i++) {
if (pt.x < (((ll->positions[i] + ll->positions[i + 1]) / 2) - subLineStart) ||
IsEOLChar(ll->chars[i])) {
return pdoc->MovePositionOutsideChar(i + posLineStart, 1);
}
}
if (pt.x < (ll->positions[lineEnd] - subLineStart)) {
return pdoc->MovePositionOutsideChar(lineEnd + posLineStart, 1);
}
}
}
return INVALID_POSITION;
}
/**
* Find the document position corresponding to an x coordinate on a particular document line.
* Ensure is between whole characters when document is in multi-byte or UTF-8 mode.
*/
int Editor::PositionFromLineX(int lineDoc, int x) {
RefreshStyleData();
if (lineDoc >= pdoc->LinesTotal())
return pdoc->Length();
//Platform::DebugPrintf("Position of (%d,%d) line = %d top=%d\n", pt.x, pt.y, line, topLine);
AutoSurface surface(this);
AutoLineLayout ll(llc, RetrieveLineLayout(lineDoc));
int retVal = 0;
if (surface && ll) {
unsigned int posLineStart = pdoc->LineStart(lineDoc);
LayoutLine(lineDoc, surface, vs, ll, wrapWidth);
retVal = ll->numCharsInLine + posLineStart;
int subLine = 0;
int lineStart = ll->LineStart(subLine);
int lineEnd = ll->LineStart(subLine + 1);
int subLineStart = ll->positions[lineStart];
if (actualWrapVisualStartIndent != 0) {
if (lineStart != 0) // Wrapped
x -= actualWrapVisualStartIndent * vs.aveCharWidth;
}
for (int i = lineStart; i < lineEnd; i++) {
if (x < (((ll->positions[i] + ll->positions[i + 1]) / 2) - subLineStart) ||
IsEOLChar(ll->chars[i])) {
retVal = pdoc->MovePositionOutsideChar(i + posLineStart, 1);
break;
}
}
}
return retVal;
}
/**
* If painting then abandon the painting because a wider redraw is needed.
* @return true if calling code should stop drawing.
*/
bool Editor::AbandonPaint() {
if ((paintState == painting) && !paintingAllText) {
paintState = paintAbandoned;
}
return paintState == paintAbandoned;
}
void Editor::RedrawRect(PRectangle rc) {
//Platform::DebugPrintf("Redraw %0d,%0d - %0d,%0d\n", rc.left, rc.top, rc.right, rc.bottom);
// Clip the redraw rectangle into the client area
PRectangle rcClient = GetClientRectangle();
if (rc.top < rcClient.top)
rc.top = rcClient.top;
if (rc.bottom > rcClient.bottom)
rc.bottom = rcClient.bottom;
if (rc.left < rcClient.left)
rc.left = rcClient.left;
if (rc.right > rcClient.right)
rc.right = rcClient.right;
if ((rc.bottom > rc.top) && (rc.right > rc.left)) {
wMain.InvalidateRectangle(rc);
}
}
void Editor::Redraw() {
//Platform::DebugPrintf("Redraw all\n");
PRectangle rcClient = GetClientRectangle();
wMain.InvalidateRectangle(rcClient);
//wMain.InvalidateAll();
}
void Editor::RedrawSelMargin(int line) {
if (!AbandonPaint()) {
if (vs.maskInLine) {
Redraw();
} else {
PRectangle rcSelMargin = GetClientRectangle();
rcSelMargin.right = vs.fixedColumnWidth;
if (line != -1) {
int position = pdoc->LineStart(line);
PRectangle rcLine = RectangleFromRange(position, position);
rcSelMargin.top = rcLine.top;
rcSelMargin.bottom = rcLine.bottom;
}
wMain.InvalidateRectangle(rcSelMargin);
}
}
}
PRectangle Editor::RectangleFromRange(int start, int end) {
int minPos = start;
if (minPos > end)
minPos = end;
int maxPos = start;
if (maxPos < end)
maxPos = end;
int minLine = cs.DisplayFromDoc(pdoc->LineFromPosition(minPos));
int lineDocMax = pdoc->LineFromPosition(maxPos);
int maxLine = cs.DisplayFromDoc(lineDocMax) + cs.GetHeight(lineDocMax) - 1;
PRectangle rcClient = GetTextRectangle();
PRectangle rc;
rc.left = vs.fixedColumnWidth;
rc.top = (minLine - topLine) * vs.lineHeight;
if (rc.top < 0)
rc.top = 0;
rc.right = rcClient.right;
rc.bottom = (maxLine - topLine + 1) * vs.lineHeight;
// Ensure PRectangle is within 16 bit space
rc.top = Platform::Clamp(rc.top, -32000, 32000);
rc.bottom = Platform::Clamp(rc.bottom, -32000, 32000);
return rc;
}
void Editor::InvalidateRange(int start, int end) {
RedrawRect(RectangleFromRange(start, end));
}
int Editor::CurrentPosition() {
return currentPos;
}
bool Editor::SelectionEmpty() {
return anchor == currentPos;
}
int Editor::SelectionStart() {
return Platform::Minimum(currentPos, anchor);
}
int Editor::SelectionEnd() {
return Platform::Maximum(currentPos, anchor);
}
void Editor::SetRectangularRange() {
if (selType == selRectangle) {
xStartSelect = XFromPosition(anchor);
xEndSelect = XFromPosition(currentPos);
}
}
void Editor::InvalidateSelection(int currentPos_, int anchor_) {
int firstAffected = anchor;
if (firstAffected > currentPos)
firstAffected = currentPos;
if (firstAffected > anchor_)
firstAffected = anchor_;
if (firstAffected > currentPos_)
firstAffected = currentPos_;
int lastAffected = anchor;
if (lastAffected < currentPos)
lastAffected = currentPos;
if (lastAffected < anchor_)
lastAffected = anchor_;
if (lastAffected < (currentPos_ + 1)) // +1 ensures caret repainted
lastAffected = (currentPos_ + 1);
needUpdateUI = true;
InvalidateRange(firstAffected, lastAffected);
}
void Editor::SetSelection(int currentPos_, int anchor_) {
currentPos_ = pdoc->ClampPositionIntoDocument(currentPos_);
anchor_ = pdoc->ClampPositionIntoDocument(anchor_);
if ((currentPos != currentPos_) || (anchor != anchor_)) {
InvalidateSelection(currentPos_, anchor_);
currentPos = currentPos_;
anchor = anchor_;
}
SetRectangularRange();
ClaimSelection();
}
void Editor::SetSelection(int currentPos_) {
currentPos_ = pdoc->ClampPositionIntoDocument(currentPos_);
if (currentPos != currentPos_) {
InvalidateSelection(currentPos_, currentPos_);
currentPos = currentPos_;