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// Scintilla source code edit control
/** @file CallTip.cxx
** Code for displaying call tips.
**/
// Copyright 1998-2001 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 "Platform.h"
#include "Scintilla.h"
#include "CallTip.h"
CallTip::CallTip() {
wCallTip = 0;
inCallTipMode = false;
posStartCallTip = 0;
val = 0;
startHighlight = 0;
endHighlight = 0;
colourBG.desired = Colour(0xff, 0xff, 0xff);
colourUnSel.desired = Colour(0x80, 0x80, 0x80);
colourSel.desired = Colour(0, 0, 0x80);
colourShade.desired = Colour(0, 0, 0);
colourLight.desired = Colour(0xc0, 0xc0, 0xc0);
}
CallTip::~CallTip() {
font.Release();
wCallTip.Destroy();
delete []val;
val = 0;
}
void CallTip::RefreshColourPalette(Palette &pal, bool want) {
pal.WantFind(colourBG, want);
pal.WantFind(colourUnSel, want);
pal.WantFind(colourSel, want);
pal.WantFind(colourShade, want);
pal.WantFind(colourLight, want);
}
void CallTip::PaintCT(Surface *surfaceWindow) {
if (!val)
return ;
PRectangle rcClientPos = wCallTip.GetClientPosition();
PRectangle rcClientSize(0, 0, rcClientPos.right - rcClientPos.left,
rcClientPos.bottom - rcClientPos.top);
PRectangle rcClient(1, 1, rcClientSize.right - 1, rcClientSize.bottom - 1);
surfaceWindow->FillRectangle(rcClient, colourBG.allocated);
// To make a nice small call tip window, it is only sized to fit most normal characters without accents
int lineHeight = surfaceWindow->Height(font);
int ascent = surfaceWindow->Ascent(font) - surfaceWindow->InternalLeading(font);
// For each line...
// Draw the definition in three parts: before highlight, highlighted, after highlight
int ytext = rcClient.top + ascent + 1;
char *chunkVal = val;
bool moreChunks = true;
while (moreChunks) {
char *chunkEnd = strchr(chunkVal, '\n');
if (chunkEnd == NULL) {
chunkEnd = chunkVal + strlen(chunkVal);
moreChunks = false;
}
int chunkOffset = chunkVal - val;
int chunkLength = chunkEnd - chunkVal;
int chunkEndOffset = chunkOffset + chunkLength;
int thisStartHighlight = Platform::Maximum(startHighlight, chunkOffset);
thisStartHighlight = Platform::Minimum(thisStartHighlight, chunkEndOffset);
thisStartHighlight -= chunkOffset;
int thisEndHighlight = Platform::Maximum(endHighlight, chunkOffset);
thisEndHighlight = Platform::Minimum(thisEndHighlight, chunkEndOffset);
thisEndHighlight -= chunkOffset;
int x = 5;
int xEnd = x + surfaceWindow->WidthText(font, chunkVal, thisStartHighlight);
rcClient.left = x;
rcClient.top = ytext - ascent - 1;
rcClient.right = xEnd;
surfaceWindow->DrawText(rcClient, font, ytext,
chunkVal, thisStartHighlight,
colourUnSel.allocated, colourBG.allocated);
x = xEnd;
xEnd = x + surfaceWindow->WidthText(font, chunkVal + thisStartHighlight,
thisEndHighlight - thisStartHighlight);
rcClient.top = ytext;
rcClient.left = x;
rcClient.right = xEnd;
surfaceWindow->DrawText(rcClient, font, ytext,
chunkVal + thisStartHighlight, thisEndHighlight - thisStartHighlight,
colourSel.allocated, colourBG.allocated);
x = xEnd;
xEnd = x + surfaceWindow->WidthText(font, chunkVal + thisEndHighlight,
chunkLength - thisEndHighlight);
rcClient.left = x;
rcClient.right = xEnd;
surfaceWindow->DrawText(rcClient, font, ytext,
chunkVal + thisEndHighlight, chunkLength - thisEndHighlight,
colourUnSel.allocated, colourBG.allocated);
chunkVal = chunkEnd + 1;
ytext += lineHeight;
}
// Draw a raised border around the edges of the window
surfaceWindow->MoveTo(0, rcClientSize.bottom - 1);
surfaceWindow->PenColour(colourShade.allocated);
surfaceWindow->LineTo(rcClientSize.right - 1, rcClientSize.bottom - 1);
surfaceWindow->LineTo(rcClientSize.right - 1, 0);
surfaceWindow->PenColour(colourLight.allocated);
surfaceWindow->LineTo(0, 0);
surfaceWindow->LineTo(0, rcClientSize.bottom - 1);
}
PRectangle CallTip::CallTipStart(int pos, Point pt, const char *defn,
const char *faceName, int size) {
Surface surfaceMeasure;
surfaceMeasure.Init();
int deviceHeight = surfaceMeasure.DeviceHeightFont(size);
font.Create(faceName, SC_CHARSET_DEFAULT, deviceHeight, false, false);
if (val)
delete []val;
val = new char[strlen(defn) + 1];
if (!val)
return PRectangle();
strcpy(val, defn);
startHighlight = 0;
endHighlight = 0;
inCallTipMode = true;
posStartCallTip = pos;
// Look for multiple lines in the text
// Only support \n here - simply means container must avoid \r!
int width = 0;
int numLines = 1;
const char *newline;
const char *look = val;
while ((newline = strchr(look, '\n')) != NULL) {
int thisWidth = surfaceMeasure.WidthText(font, look, newline - look);
width = Platform::Maximum(width, thisWidth);
look = newline + 1;
numLines++;
}
int lastWidth = surfaceMeasure.WidthText(font, look, strlen(look));
width = Platform::Maximum(width, lastWidth) + 10;
int lineHeight = surfaceMeasure.Height(font);
// Extra line for border and an empty line at top and bottom
int height = lineHeight * numLines - surfaceMeasure.InternalLeading(font) + 2 + 2;
return PRectangle(pt.x -5, pt.y + 1, pt.x + width - 5, pt.y + 1 + height);
}
void CallTip::CallTipCancel() {
inCallTipMode = false;
if (wCallTip.Created()) {
wCallTip.Destroy();
}
}
void CallTip::SetHighlight(int start, int end) {
// Avoid flashing by checking something has really changed
if ((start != startHighlight) || (end != endHighlight)) {
startHighlight = start;
endHighlight = end;
if (wCallTip.Created()) {
wCallTip.InvalidateAll();
}
}
}
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