Initial revision

1 files changed, 168 insertions, 0 deletions

diff --git a/src/CallTip.cxx b/src/CallTip.cxx
new file mode 100644
index 000000000..ad6740208
--- /dev/null
+++ b/src/CallTip.cxx
@@ -0,0 +1,168 @@
+// Scintilla source code edit control
+// CallTip.cxx - code for displaying call tips
+// Copyright 1998-2000 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 "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() {
+	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 = (size * surfaceMeasure.LogPixelsY()) / 72;
+	font.Create(faceName, deviceHeight);
+	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 + lineHeight + 1, pt.x + width - 5, pt.y + lineHeight + 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();
+		}
+	}
+}