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Improved word wrapping and tab key handling.

This commit is contained in:
Thomas Weidenmueller 2005-11-21 13:34:06 +00:00 committed by Alexandre Julliard
parent 8bbde0c4d4
commit 36f6bbb85c
1 changed files with 158 additions and 112 deletions
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270
dlls/comctl32/syslink.c
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@ -1,7 +1,7 @@
/*
* SysLink control
*
* Copyright 2004 Thomas Weidenmueller <w3seek@reactos.com>
* Copyright 2004, 2005 Thomas Weidenmueller <w3seek@reactos.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -25,12 +25,6 @@
* Unless otherwise noted, we believe this code to be complete, as per
* the specification mentioned above.
* If you discover missing features, or bugs, please note them below.
*
* TODO:
* - Fix SHIFT+TAB and TAB issue (wrong link is selected when control gets the focus)
* - Better string parsing
* - Improve word wrapping
*
*/
#include <stdarg.h>
@ -52,6 +46,7 @@ INT WINAPI StrCmpNIW(LPCWSTR,LPCWSTR,INT);
typedef struct
{
int nChars;
int nSkip;
RECT rc;
} DOC_TEXTBLOCK, *PDOC_TEXTBLOCK;
@ -78,7 +73,6 @@ typedef struct _DOC_ITEM
UINT state; /* Link state */
WCHAR *szID; /* Link ID string */
WCHAR *szUrl; /* Link URL string */
HRGN hRgn; /* Region of the link */
} Link;
struct
{
@ -100,6 +94,7 @@ typedef struct
COLORREF TextColor; /* Color of the text */
COLORREF LinkColor; /* Color of links */
COLORREF VisitedColor; /* Color of visited links */
WCHAR BreakChar; /* Break Character for the current font */
} SYSLINK_INFO;
static const WCHAR SL_LINKOPEN[] = { '<','a', 0 };
@ -126,11 +121,6 @@ static VOID SYSLINK_FreeDocItem (PDOC_ITEM DocItem)
Free(DocItem->u.Link.szUrl);
}
if(DocItem->Type == slLink && DocItem->u.Link.hRgn != NULL)
{
DeleteObject(DocItem->u.Link.hRgn);
}
/* we don't free Text because it's just a pointer to a character in the
entire window text string */
@ -215,9 +205,8 @@ static UINT SYSLINK_ParseText (SYSLINK_INFO *infoPtr, LPCWSTR Text)
{
BOOL ValidParam = FALSE, ValidLink = FALSE;
switch (*(current + 2))
if(*(current + 2) == '>')
{
case '>':
/* we just have to deal with a <a> tag */
taglen = 3;
ValidLink = TRUE;
@ -226,8 +215,8 @@ static UINT SYSLINK_ParseText (SYSLINK_INFO *infoPtr, LPCWSTR Text)
linklen = 0;
lpID = NULL;
lpUrl = NULL;
break;
case ' ':
}
else if(*(current + 2) == infoPtr->BreakChar)
{
/* we expect parameters, parse them */
LPCWSTR *CurrentParameter = NULL, tmp;
@ -285,27 +274,22 @@ CheckParameter:
* 1. another parameter is coming, so expect a ' ' (space) character
* 2. the tag is being closed, so expect a '<' character
*/
switch(*tmp)
if(*tmp == infoPtr->BreakChar)
{
case ' ':
/* we expect another parameter, do the whole thing again */
taglen++;
tmp++;
goto CheckParameter;
case '>':
}
else if(*tmp == '>')
{
/* the tag is being closed, we're done */
ValidLink = TRUE;
taglen++;
break;
default:
tmp++;
break;
}
else
tmp++;
}
break;
}
}
if(ValidLink && ValidParam)
@ -495,16 +479,26 @@ CheckParameter:
*/
static VOID SYSLINK_RepaintLink (SYSLINK_INFO *infoPtr, PDOC_ITEM DocItem)
{
PDOC_TEXTBLOCK bl;
int n;
if(DocItem->Type != slLink)
{
ERR("DocItem not a link!\n");
return;
}
if(DocItem->u.Link.hRgn != NULL)
bl = DocItem->Blocks;
if (bl != NULL)
{
/* repaint the region */
RedrawWindow(infoPtr->Self, NULL, DocItem->u.Link.hRgn, RDW_INVALIDATE | RDW_UPDATENOW);
n = DocItem->nText;
while(n > 0)
{
InvalidateRect(infoPtr->Self, &bl->rc, TRUE);
n -= bl->nChars + bl->nSkip;
bl++;
}
}
}
@ -615,7 +609,8 @@ static PDOC_ITEM SYSLINK_GetPrevLink (SYSLINK_INFO *infoPtr, PDOC_ITEM Current)
* SYSLINK_WrapLine
* Tries to wrap a line.
*/
static BOOL SYSLINK_WrapLine (HDC hdc, LPWSTR Text, WCHAR BreakChar, int *LineLen, int nFit, LPSIZE Extent, int Width)
static BOOL SYSLINK_WrapLine (HDC hdc, LPWSTR Text, WCHAR BreakChar, int *LineLen,
int nFit, LPSIZE Extent, int Width)
{
WCHAR *Current;
@ -659,7 +654,6 @@ static VOID SYSLINK_Render (SYSLINK_INFO *infoPtr, HDC hdc)
PDOC_ITEM Current;
HGDIOBJ hOldFont;
int x, y, LineHeight;
TEXTMETRICW tm;
GetClientRect(infoPtr->Self, &rc);
rc.right -= SL_RIGHTMARGIN;
@ -668,7 +662,6 @@ static VOID SYSLINK_Render (SYSLINK_INFO *infoPtr, HDC hdc)
if(rc.right - SL_LEFTMARGIN < 0 || rc.bottom - SL_TOPMARGIN < 0) return;
hOldFont = SelectObject(hdc, infoPtr->Font);
GetTextMetricsW(hdc, &tm);
x = SL_LEFTMARGIN;
y = SL_TOPMARGIN;
@ -684,13 +677,18 @@ static VOID SYSLINK_Render (SYSLINK_INFO *infoPtr, HDC hdc)
if(Current->nText == 0)
{
ERR("DOC_ITEM with no text?!\n");
continue;
}
tx = Current->Text;
n = Current->nText;
bl = Current->Blocks;
if (Current->Blocks != NULL)
{
Free(Current->Blocks);
Current->Blocks = NULL;
}
bl = NULL;
nBlocks = 0;
if(Current->Type == slText)
@ -704,41 +702,80 @@ static VOID SYSLINK_Render (SYSLINK_INFO *infoPtr, HDC hdc)
while(n > 0)
{
if(GetTextExtentExPointW(hdc, tx, n, rc.right - x, &nFit, NULL, &szDim))
int SkipChars = 0;
/* skip break characters unless they're the first of the doc item */
if(tx != Current->Text || x == SL_LEFTMARGIN)
{
while(n > 0 && (*tx) == infoPtr->BreakChar)
{
tx++;
SkipChars++;
n--;
}
}
if((n == 0 && SkipChars != 0) ||
GetTextExtentExPointW(hdc, tx, n, rc.right - x, &nFit, NULL, &szDim))
{
int LineLen = n;
BOOL Wrap = SYSLINK_WrapLine(hdc, tx, tm.tmBreakChar, &LineLen, nFit, &szDim, rc.right - x);
BOOL Wrap = FALSE;
if(LineLen == 0)
if(n != 0)
{
if(x > SL_LEFTMARGIN)
Wrap = SYSLINK_WrapLine(hdc, tx, infoPtr->BreakChar, &LineLen, nFit, &szDim, rc.right - x);
if(LineLen == 0)
{
/* move one line down, the word didn't fit into the line */
x = SL_LEFTMARGIN;
y += LineHeight;
LineHeight = 0;
continue;
if(x > SL_LEFTMARGIN)
{
/* move one line down, the word didn't fit into the line */
x = SL_LEFTMARGIN;
y += LineHeight;
LineHeight = 0;
continue;
}
else
{
/* the word starts at the beginning of the line and doesn't
fit into the line, so break it at the last character that fits */
LineLen = max(nFit, 1);
}
}
else
if(LineLen != n)
{
/* the word starts at the beginning of the line and doesn't
fit into the line, so break it at the last character that fits */
LineLen = max(nFit, 1);
if(!GetTextExtentExPointW(hdc, tx, LineLen, rc.right - x, NULL, NULL, &szDim))
{
if(bl != NULL)
{
Free(bl);
bl = NULL;
}
break;
}
}
}
if(LineLen != n)
{
GetTextExtentExPointW(hdc, tx, LineLen, rc.right - x, NULL, NULL, &szDim);
}
if(bl != NULL)
{
bl = ReAlloc(bl, ++nBlocks * sizeof(DOC_TEXTBLOCK));
PDOC_TEXTBLOCK nbl = ReAlloc(bl, (nBlocks + 1) * sizeof(DOC_TEXTBLOCK));
if (nbl != NULL)
{
bl = nbl;
nBlocks++;
}
else
{
Free(bl);
bl = NULL;
}
}
else
{
bl = Alloc(++nBlocks * sizeof(DOC_TEXTBLOCK));
bl = Alloc((nBlocks + 1) * sizeof(DOC_TEXTBLOCK));
if (bl != NULL)
nBlocks++;
}
if(bl != NULL)
@ -746,41 +783,23 @@ static VOID SYSLINK_Render (SYSLINK_INFO *infoPtr, HDC hdc)
cbl = bl + nBlocks - 1;
cbl->nChars = LineLen;
cbl->nSkip = SkipChars;
cbl->rc.left = x;
cbl->rc.top = y;
cbl->rc.right = x + szDim.cx;
cbl->rc.bottom = y + szDim.cy;
x += szDim.cx;
LineHeight = max(LineHeight, szDim.cy);
/* (re)calculate the link's region */
if(Current->Type == slLink)
if(LineLen != 0)
{
if(nBlocks <= 1)
x += szDim.cx;
LineHeight = max(LineHeight, szDim.cy);
if(Wrap)
{
if(Current->u.Link.hRgn != NULL)
{
DeleteObject(Current->u.Link.hRgn);
}
/* initialize the link's hRgn */
Current->u.Link.hRgn = CreateRectRgnIndirect(&cbl->rc);
x = SL_LEFTMARGIN;
y += LineHeight;
LineHeight = 0;
}
else if(Current->u.Link.hRgn != NULL)
{
HRGN hrgn;
hrgn = CreateRectRgnIndirect(&cbl->rc);
/* add the rectangle */
CombineRgn(Current->u.Link.hRgn, Current->u.Link.hRgn, hrgn, RGN_OR);
DeleteObject(hrgn);
}
}
if(Wrap)
{
x = SL_LEFTMARGIN;
y += LineHeight;
LineHeight = 0;
}
}
else
@ -793,11 +812,16 @@ static VOID SYSLINK_Render (SYSLINK_INFO *infoPtr, HDC hdc)
}
else
{
ERR("GetTextExtentExPoint() failed?!\n");
n--;
}
}
Current->Blocks = bl;
if(nBlocks != 0)
{
Current->Blocks = bl;
}
else
Current->Blocks = NULL;
}
SelectObject(hdc, hOldFont);
@ -849,6 +873,7 @@ static LRESULT SYSLINK_Draw (SYSLINK_INFO *infoPtr, HDC hdc)
while(n > 0)
{
tx += bl->nSkip;
ExtTextOutW(hdc, bl->rc.left, bl->rc.top, ETO_OPAQUE | ETO_CLIPPED, &bl->rc, tx, bl->nChars, NULL);
if((Current->Type == slLink) && (Current->u.Link.state & LIS_FOCUSED) && infoPtr->HasFocus)
{
@ -858,7 +883,7 @@ static LRESULT SYSLINK_Draw (SYSLINK_INFO *infoPtr, HDC hdc)
SetBkColor(hdc, PrevColor);
}
tx += bl->nChars;
n -= bl->nChars;
n -= bl->nChars + bl->nSkip;
bl++;
}
}
@ -896,6 +921,7 @@ static HFONT SYSLINK_SetFont (SYSLINK_INFO *infoPtr, HFONT hFont, BOOL bRedraw)
{
HDC hdc;
LOGFONTW lf;
TEXTMETRICW tm;
HFONT hOldFont = infoPtr->Font;
infoPtr->Font = hFont;
@ -911,10 +937,12 @@ static HFONT SYSLINK_SetFont (SYSLINK_INFO *infoPtr, HFONT hFont, BOOL bRedraw)
if(hdc != NULL)
{
/* create a new underline font */
if(GetObjectW(infoPtr->Font, sizeof(LOGFONTW), &lf))
if(GetTextMetricsW(hdc, &tm) &&
GetObjectW(infoPtr->Font, sizeof(LOGFONTW), &lf))
{
lf.lfUnderline = TRUE;
infoPtr->LinkFont = CreateFontIndirectW(&lf);
infoPtr->BreakChar = tm.tmBreakChar;
}
else
{
@ -1132,6 +1160,34 @@ static LRESULT SYSLINK_GetItem (SYSLINK_INFO *infoPtr, PLITEM Item)
return TRUE;
}
/***********************************************************************
* SYSLINK_PtInDocItem
* Determines if a point is in the region of a document item
*/
static BOOL SYSLINK_PtInDocItem (PDOC_ITEM DocItem, POINT pt)
{
PDOC_TEXTBLOCK bl;
int n;
bl = DocItem->Blocks;
if (bl != NULL)
{
n = DocItem->nText;
while(n > 0)
{
if (PtInRect(&bl->rc, pt))
{
return TRUE;
}
n -= bl->nChars + bl->nSkip;
bl++;
}
}
return FALSE;
}
/***********************************************************************
* SYSLINK_HitTest
* Determines the link the user clicked on.
@ -1145,8 +1201,7 @@ static LRESULT SYSLINK_HitTest (SYSLINK_INFO *infoPtr, PLHITTESTINFO HitTest)
{
if(Current->Type == slLink)
{
if((Current->u.Link.hRgn != NULL) &&
PtInRegion(Current->u.Link.hRgn, HitTest->pt.x, HitTest->pt.y))
if(SYSLINK_PtInDocItem(Current, HitTest->pt))
{
HitTest->item.mask = 0;
HitTest->item.iLink = id;
@ -1252,25 +1307,13 @@ static LRESULT SYSLINK_SetFocus (SYSLINK_INFO *infoPtr, HWND PrevFocusWindow)
infoPtr->HasFocus = TRUE;
#if 1
/* FIXME - How to detect whether SHIFT+TAB or just TAB has been pressed?
* The problem is we could get this message without keyboard input, too
*/
Focus = SYSLINK_GetFocusLink(infoPtr, NULL);
if(Focus == NULL && (Focus = SYSLINK_GetNextLink(infoPtr, NULL)))
{
SYSLINK_SetFocusLink(infoPtr, Focus);
}
#else
/* This is a temporary hack since I'm not really sure how to detect which link to select.
See message above! */
/* We always select the first link, even if we activated the control using
SHIFT+TAB. This is the default behavior */
Focus = SYSLINK_GetNextLink(infoPtr, NULL);
if(Focus != NULL)
{
SYSLINK_SetFocusLink(infoPtr, Focus);
}
#endif
SYSLINK_RepaintLink(infoPtr, Focus);
@ -1307,8 +1350,7 @@ static PDOC_ITEM SYSLINK_LinkAtPt (SYSLINK_INFO *infoPtr, POINT *pt, int *LinkId
for(Current = infoPtr->Items; Current != NULL; Current = Current->Next)
{
if((Current->Type == slLink) && (Current->u.Link.hRgn != NULL) &&
PtInRegion(Current->u.Link.hRgn, pt->x, pt->y) &&
if((Current->Type == slLink) && SYSLINK_PtInDocItem(Current, *pt) &&
(!MustBeEnabled || (MustBeEnabled && (Current->u.Link.state & LIS_ENABLED))))
{
if(LinkId != NULL)
@ -1335,6 +1377,8 @@ static LRESULT SYSLINK_LButtonDown (SYSLINK_INFO *infoPtr, DWORD Buttons, POINT
Current = SYSLINK_LinkAtPt(infoPtr, pt, &id, TRUE);
if(Current != NULL)
{
SetFocus(infoPtr->Self);
Old = SYSLINK_SetFocusLink(infoPtr, Current);
if(Old != NULL && Old != Current)
{
@ -1342,7 +1386,6 @@ static LRESULT SYSLINK_LButtonDown (SYSLINK_INFO *infoPtr, DWORD Buttons, POINT
}
infoPtr->MouseDownID = id;
SYSLINK_RepaintLink(infoPtr, Current);
SetFocus(infoPtr->Self);
}
return 0;
@ -1460,7 +1503,7 @@ static LRESULT WINAPI SysLinkWindowProc(HWND hwnd, UINT message,
infoPtr = (SYSLINK_INFO *)GetWindowLongPtrW(hwnd, 0);
if (!infoPtr && message != WM_CREATE)
return DefWindowProcW( hwnd, message, wParam, lParam );
goto HandleDefaultMessage;
switch(message) {
case WM_PRINTCLIENT:
@ -1482,8 +1525,7 @@ static LRESULT WINAPI SysLinkWindowProc(HWND hwnd, UINT message,
return TRUE;
}
/* let the default window proc handle this message */
return DefWindowProcW(hwnd, message, wParam, lParam);
goto HandleDefaultMessage;
}
case WM_SIZE:
@ -1505,7 +1547,7 @@ static LRESULT WINAPI SysLinkWindowProc(HWND hwnd, UINT message,
case WM_SETTEXT:
SYSLINK_SetText(infoPtr, (LPWSTR)lParam);
return DefWindowProcW(hwnd, message, wParam, lParam);
goto HandleDefaultMessage;
case WM_LBUTTONDOWN:
{
@ -1536,7 +1578,7 @@ static LRESULT WINAPI SysLinkWindowProc(HWND hwnd, UINT message,
return 0;
}
}
return DefWindowProcW(hwnd, message, wParam, lParam);
goto HandleDefaultMessage;
}
case WM_GETDLGCODE:
@ -1638,6 +1680,7 @@ static LRESULT WINAPI SysLinkWindowProc(HWND hwnd, UINT message,
infoPtr->TextColor = GetSysColor(COLOR_WINDOWTEXT);
infoPtr->LinkColor = GetSysColor(COLOR_HIGHLIGHT);
infoPtr->VisitedColor = GetSysColor(COLOR_HIGHLIGHT);
infoPtr->BreakChar = ' ';
TRACE("SysLink Ctrl creation, hwnd=%p\n", hwnd);
SYSLINK_SetText(infoPtr, ((LPCREATESTRUCTW)lParam)->lpszName);
return 0;
@ -1652,8 +1695,11 @@ static LRESULT WINAPI SysLinkWindowProc(HWND hwnd, UINT message,
return 0;
default:
HandleDefaultMessage:
if ((message >= WM_USER) && (message < WM_APP))
ERR("unknown msg %04x wp=%04x lp=%08lx\n", message, wParam, lParam );
{
ERR("unknown msg %04x wp=%04x lp=%08lx\n", message, wParam, lParam );
}
return DefWindowProcW(hwnd, message, wParam, lParam);
}
}