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wine/dlls/comctl32/syslink.c
Alexandre Julliard 6d7ad66315 comctl32: Avoid repainting a NULL link.
2009-06-08 18:13:22 +02:00

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/*
* SysLink control
*
* Copyright 2004 - 2006 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
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* NOTES
*
* This code was audited for completeness against the documented features
* of Comctl32.dll version 6.0 on Apr. 4, 2005, by Dimitrie O. Paun.
*
* 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.
*/
#include <stdarg.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "commctrl.h"
#include "comctl32.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(progress);
INT WINAPI StrCmpNIW(LPCWSTR,LPCWSTR,INT);
typedef struct
{
int nChars;
int nSkip;
RECT rc;
} DOC_TEXTBLOCK, *PDOC_TEXTBLOCK;
#define LIF_FLAGSMASK (LIF_STATE | LIF_ITEMID | LIF_URL)
#define LIS_MASK (LIS_FOCUSED | LIS_ENABLED | LIS_VISITED)
typedef enum
{
slText = 0,
slLink
} SL_ITEM_TYPE;
typedef struct _DOC_ITEM
{
struct _DOC_ITEM *Next; /* Address to the next item */
UINT nText; /* Number of characters of the text */
SL_ITEM_TYPE Type; /* type of the item */
PDOC_TEXTBLOCK Blocks; /* Array of text blocks */
union
{
struct
{
UINT state; /* Link state */
WCHAR *szID; /* Link ID string */
WCHAR *szUrl; /* Link URL string */
} Link;
struct
{
UINT Dummy;
} Text;
} u;
WCHAR Text[1]; /* Text of the document item */
} DOC_ITEM, *PDOC_ITEM;
typedef struct
{
HWND Self; /* The window handle for this control */
HWND Notify; /* The parent handle to receive notifications */
DWORD Style; /* Styles for this control */
PDOC_ITEM Items; /* Address to the first document item */
BOOL HasFocus; /* Whether the control has the input focus */
int MouseDownID; /* ID of the link that the mouse button first selected */
HFONT Font; /* Handle to the font for text */
HFONT LinkFont; /* Handle to the font for links */
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 };
static const WCHAR SL_HREF[] = { 'h','r','e','f','=','\"',0 };
static const WCHAR SL_ID[] = { 'i','d','=','\"',0 };
static const WCHAR SL_LINKCLOSE[] = { '<','/','a','>',0 };
/* Control configuration constants */
#define SL_LEFTMARGIN (0)
#define SL_TOPMARGIN (0)
#define SL_RIGHTMARGIN (0)
#define SL_BOTTOMMARGIN (0)
/***********************************************************************
* SYSLINK_FreeDocItem
* Frees all data and gdi objects associated with a document item
*/
static VOID SYSLINK_FreeDocItem (PDOC_ITEM DocItem)
{
if(DocItem->Type == slLink)
{
Free(DocItem->u.Link.szID);
Free(DocItem->u.Link.szUrl);
}
/* we don't free Text because it's just a pointer to a character in the
entire window text string */
Free(DocItem);
}
/***********************************************************************
* SYSLINK_AppendDocItem
* Create and append a new document item.
*/
static PDOC_ITEM SYSLINK_AppendDocItem (SYSLINK_INFO *infoPtr, LPCWSTR Text, UINT textlen,
SL_ITEM_TYPE type, PDOC_ITEM LastItem)
{
PDOC_ITEM Item;
textlen = min(textlen, strlenW(Text));
Item = Alloc(FIELD_OFFSET(DOC_ITEM, Text[textlen + 1]));
if(Item == NULL)
{
ERR("Failed to alloc DOC_ITEM structure!\n");
return NULL;
}
Item->Next = NULL;
Item->nText = textlen;
Item->Type = type;
Item->Blocks = NULL;
if(LastItem != NULL)
{
LastItem->Next = Item;
}
else
{
infoPtr->Items = Item;
}
lstrcpynW(Item->Text, Text, textlen + 1);
return Item;
}
/***********************************************************************
* SYSLINK_ClearDoc
* Clears the document tree
*/
static VOID SYSLINK_ClearDoc (SYSLINK_INFO *infoPtr)
{
PDOC_ITEM Item, Next;
Item = infoPtr->Items;
while(Item != NULL)
{
Next = Item->Next;
SYSLINK_FreeDocItem(Item);
Item = Next;
}
infoPtr->Items = NULL;
}
/***********************************************************************
* SYSLINK_ParseText
* Parses the window text string and creates a document. Returns the
* number of document items created.
*/
static UINT SYSLINK_ParseText (SYSLINK_INFO *infoPtr, LPCWSTR Text)
{
LPCWSTR current, textstart = NULL, linktext = NULL, firsttag = NULL;
int taglen = 0, textlen = 0, linklen = 0, docitems = 0;
PDOC_ITEM Last = NULL;
SL_ITEM_TYPE CurrentType = slText;
LPCWSTR lpID, lpUrl;
UINT lenId, lenUrl;
for(current = Text; *current != 0;)
{
if(*current == '<')
{
if(!StrCmpNIW(current, SL_LINKOPEN, 2) && (CurrentType == slText))
{
BOOL ValidParam = FALSE, ValidLink = FALSE;
if(*(current + 2) == '>')
{
/* we just have to deal with a <a> tag */
taglen = 3;
ValidLink = TRUE;
ValidParam = TRUE;
firsttag = current;
linklen = 0;
lpID = NULL;
lpUrl = NULL;
}
else if(*(current + 2) == infoPtr->BreakChar)
{
/* we expect parameters, parse them */
LPCWSTR *CurrentParameter = NULL, tmp;
UINT *CurrentParameterLen = NULL;
taglen = 3;
tmp = current + taglen;
lpID = NULL;
lpUrl = NULL;
CheckParameter:
/* compare the current position with all known parameters */
if(!StrCmpNIW(tmp, SL_HREF, 6))
{
taglen += 6;
ValidParam = TRUE;
CurrentParameter = &lpUrl;
CurrentParameterLen = &lenUrl;
}
else if(!StrCmpNIW(tmp, SL_ID, 4))
{
taglen += 4;
ValidParam = TRUE;
CurrentParameter = &lpID;
CurrentParameterLen = &lenId;
}
else
{
ValidParam = FALSE;
}
if(ValidParam)
{
/* we got a known parameter, now search until the next " character.
If we can't find a " character, there's a syntax error and we just assume it's text */
ValidParam = FALSE;
*CurrentParameter = current + taglen;
*CurrentParameterLen = 0;
for(tmp = *CurrentParameter; *tmp != 0; tmp++)
{
taglen++;
if(*tmp == '\"')
{
ValidParam = TRUE;
tmp++;
break;
}
(*CurrentParameterLen)++;
}
}
if(ValidParam)
{
/* we're done with this parameter, now there are only 2 possibilities:
* 1. another parameter is coming, so expect a ' ' (space) character
* 2. the tag is being closed, so expect a '<' character
*/
if(*tmp == infoPtr->BreakChar)
{
/* we expect another parameter, do the whole thing again */
taglen++;
tmp++;
goto CheckParameter;
}
else if(*tmp == '>')
{
/* the tag is being closed, we're done */
ValidLink = TRUE;
taglen++;
}
}
}
if(ValidLink && ValidParam)
{
/* the <a ...> tag appears to be valid. save all information
so we can add the link if we find a valid </a> tag later */
CurrentType = slLink;
linktext = current + taglen;
linklen = 0;
firsttag = current;
}
else
{
taglen = 1;
lpID = NULL;
lpUrl = NULL;
if(textstart == NULL)
{
textstart = current;
}
}
}
else if(!StrCmpNIW(current, SL_LINKCLOSE, 4) && (CurrentType == slLink) && firsttag)
{
/* there's a <a...> tag opened, first add the previous text, if present */
if(textstart != NULL && textlen > 0 && firsttag > textstart)
{
Last = SYSLINK_AppendDocItem(infoPtr, textstart, firsttag - textstart, slText, Last);
if(Last == NULL)
{
ERR("Unable to create new document item!\n");
return docitems;
}
docitems++;
textstart = NULL;
textlen = 0;
}
/* now it's time to add the link to the document */
current += 4;
if(linktext != NULL && linklen > 0)
{
Last = SYSLINK_AppendDocItem(infoPtr, linktext, linklen, slLink, Last);
if(Last == NULL)
{
ERR("Unable to create new document item!\n");
return docitems;
}
docitems++;
if(CurrentType == slLink)
{
int nc;
if(!(infoPtr->Style & WS_DISABLED))
{
Last->u.Link.state |= LIS_ENABLED;
}
/* Copy the tag parameters */
if(lpID != NULL)
{
nc = min(lenId, strlenW(lpID));
nc = min(nc, MAX_LINKID_TEXT - 1);
Last->u.Link.szID = Alloc((nc + 1) * sizeof(WCHAR));
if(Last->u.Link.szID != NULL)
{
lstrcpynW(Last->u.Link.szID, lpID, nc + 1);
}
}
else
Last->u.Link.szID = NULL;
if(lpUrl != NULL)
{
nc = min(lenUrl, strlenW(lpUrl));
nc = min(nc, L_MAX_URL_LENGTH - 1);
Last->u.Link.szUrl = Alloc((nc + 1) * sizeof(WCHAR));
if(Last->u.Link.szUrl != NULL)
{
lstrcpynW(Last->u.Link.szUrl, lpUrl, nc + 1);
}
}
else
Last->u.Link.szUrl = NULL;
}
linktext = NULL;
}
CurrentType = slText;
firsttag = NULL;
textstart = NULL;
continue;
}
else
{
/* we don't know what tag it is, so just continue */
taglen = 1;
linklen++;
if(CurrentType == slText && textstart == NULL)
{
textstart = current;
}
}
textlen += taglen;
current += taglen;
}
else
{
textlen++;
linklen++;
/* save the pointer of the current text item if we couldn't find a tag */
if(textstart == NULL && CurrentType == slText)
{
textstart = current;
}
current++;
}
}
if(textstart != NULL && textlen > 0)
{
Last = SYSLINK_AppendDocItem(infoPtr, textstart, textlen, CurrentType, Last);
if(Last == NULL)
{
ERR("Unable to create new document item!\n");
return docitems;
}
if(CurrentType == slLink)
{
int nc;
if(!(infoPtr->Style & WS_DISABLED))
{
Last->u.Link.state |= LIS_ENABLED;
}
/* Copy the tag parameters */
if(lpID != NULL)
{
nc = min(lenId, strlenW(lpID));
nc = min(nc, MAX_LINKID_TEXT - 1);
Last->u.Link.szID = Alloc((nc + 1) * sizeof(WCHAR));
if(Last->u.Link.szID != NULL)
{
lstrcpynW(Last->u.Link.szID, lpID, nc + 1);
}
}
else
Last->u.Link.szID = NULL;
if(lpUrl != NULL)
{
nc = min(lenUrl, strlenW(lpUrl));
nc = min(nc, L_MAX_URL_LENGTH - 1);
Last->u.Link.szUrl = Alloc((nc + 1) * sizeof(WCHAR));
if(Last->u.Link.szUrl != NULL)
{
lstrcpynW(Last->u.Link.szUrl, lpUrl, nc + 1);
}
}
else
Last->u.Link.szUrl = NULL;
}
docitems++;
}
if(linktext != NULL && linklen > 0)
{
/* we got an unclosed link, just display the text */
Last = SYSLINK_AppendDocItem(infoPtr, linktext, linklen, slText, Last);
if(Last == NULL)
{
ERR("Unable to create new document item!\n");
return docitems;
}
docitems++;
}
return docitems;
}
/***********************************************************************
* SYSLINK_RepaintLink
* Repaints a link.
*/
static VOID SYSLINK_RepaintLink (const SYSLINK_INFO *infoPtr, const DOC_ITEM *DocItem)
{
PDOC_TEXTBLOCK bl;
int n;
if(DocItem->Type != slLink)
{
ERR("DocItem not a link!\n");
return;
}
bl = DocItem->Blocks;
if (bl != NULL)
{
n = DocItem->nText;
while(n > 0)
{
InvalidateRect(infoPtr->Self, &bl->rc, TRUE);
n -= bl->nChars + bl->nSkip;
bl++;
}
}
}
/***********************************************************************
* SYSLINK_GetLinkItemByIndex
* Retrieves a document link by its index
*/
static PDOC_ITEM SYSLINK_GetLinkItemByIndex (const SYSLINK_INFO *infoPtr, int iLink)
{
PDOC_ITEM Current = infoPtr->Items;
while(Current != NULL)
{
if((Current->Type == slLink) && (iLink-- <= 0))
{
return Current;
}
Current = Current->Next;
}
return NULL;
}
/***********************************************************************
* SYSLINK_GetFocusLink
* Retrieves the link that has the LIS_FOCUSED bit
*/
static PDOC_ITEM SYSLINK_GetFocusLink (const SYSLINK_INFO *infoPtr, int *LinkId)
{
PDOC_ITEM Current = infoPtr->Items;
int id = 0;
while(Current != NULL)
{
if((Current->Type == slLink))
{
if(Current->u.Link.state & LIS_FOCUSED)
{
if(LinkId != NULL)
*LinkId = id;
return Current;
}
id++;
}
Current = Current->Next;
}
return NULL;
}
/***********************************************************************
* SYSLINK_GetNextLink
* Gets the next link
*/
static PDOC_ITEM SYSLINK_GetNextLink (const SYSLINK_INFO *infoPtr, PDOC_ITEM Current)
{
for(Current = (Current != NULL ? Current->Next : infoPtr->Items);
Current != NULL;
Current = Current->Next)
{
if(Current->Type == slLink)
{
return Current;
}
}
return NULL;
}
/***********************************************************************
* SYSLINK_GetPrevLink
* Gets the previous link
*/
static PDOC_ITEM SYSLINK_GetPrevLink (const SYSLINK_INFO *infoPtr, PDOC_ITEM Current)
{
if(Current == NULL)
{
/* returns the last link */
PDOC_ITEM Last = NULL;
for(Current = infoPtr->Items; Current != NULL; Current = Current->Next)
{
if(Current->Type == slLink)
{
Last = Current;
}
}
return Last;
}
else
{
/* returns the previous link */
PDOC_ITEM Cur, Prev = NULL;
for(Cur = infoPtr->Items; Cur != NULL; Cur = Cur->Next)
{
if(Cur == Current)
{
break;
}
if(Cur->Type == slLink)
{
Prev = Cur;
}
}
return Prev;
}
}
/***********************************************************************
* SYSLINK_WrapLine
* Tries to wrap a line.
*/
static BOOL SYSLINK_WrapLine (LPWSTR Text, WCHAR BreakChar, int *LineLen,
int nFit, LPSIZE Extent)
{
WCHAR *Current;
if(nFit == *LineLen)
{
return FALSE;
}
*LineLen = nFit;
Current = Text + nFit;
/* check if we're in the middle of a word */
if((*Current) != BreakChar)
{
/* search for the beginning of the word */
while(Current > Text && (*(Current - 1)) != BreakChar)
{
Current--;
(*LineLen)--;
}
if((*LineLen) == 0)
{
Extent->cx = 0;
Extent->cy = 0;
}
return TRUE;
}
return TRUE;
}
/***********************************************************************
* SYSLINK_Render
* Renders the document in memory
*/
static VOID SYSLINK_Render (const SYSLINK_INFO *infoPtr, HDC hdc, PRECT pRect)
{
RECT rc;
PDOC_ITEM Current;
HGDIOBJ hOldFont;
int x, y, LineHeight;
SIZE szDoc;
szDoc.cx = szDoc.cy = 0;
rc = *pRect;
rc.right -= SL_RIGHTMARGIN;
rc.bottom -= SL_BOTTOMMARGIN;
if(rc.right - SL_LEFTMARGIN < 0)
rc.right = MAXLONG;
if (rc.bottom - SL_TOPMARGIN < 0)
rc.bottom = MAXLONG;
hOldFont = SelectObject(hdc, infoPtr->Font);
x = SL_LEFTMARGIN;
y = SL_TOPMARGIN;
LineHeight = 0;
for(Current = infoPtr->Items; Current != NULL; Current = Current->Next)
{
int n, nBlocks;
LPWSTR tx;
PDOC_TEXTBLOCK bl, cbl;
INT nFit;
SIZE szDim;
if(Current->nText == 0)
{
continue;
}
tx = Current->Text;
n = Current->nText;
Free(Current->Blocks);
Current->Blocks = NULL;
bl = NULL;
nBlocks = 0;
if(Current->Type == slText)
{
SelectObject(hdc, infoPtr->Font);
}
else if(Current->Type == slLink)
{
SelectObject(hdc, infoPtr->LinkFont);
}
while(n > 0)
{
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 = FALSE;
PDOC_TEXTBLOCK nbl;
if(n != 0)
{
Wrap = SYSLINK_WrapLine(tx, infoPtr->BreakChar, &LineLen, nFit, &szDim);
if(LineLen == 0)
{
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);
}
}
if(LineLen != n)
{
if(!GetTextExtentExPointW(hdc, tx, LineLen, rc.right - x, NULL, NULL, &szDim))
{
if(bl != NULL)
{
Free(bl);
bl = NULL;
nBlocks = 0;
}
break;
}
}
}
nbl = ReAlloc(bl, (nBlocks + 1) * sizeof(DOC_TEXTBLOCK));
if (nbl != NULL)
{
bl = nbl;
nBlocks++;
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;
if (cbl->rc.right > szDoc.cx)
szDoc.cx = cbl->rc.right;
if (cbl->rc.bottom > szDoc.cy)
szDoc.cy = cbl->rc.bottom;
if(LineLen != 0)
{
x += szDim.cx;
LineHeight = max(LineHeight, szDim.cy);
if(Wrap)
{
x = SL_LEFTMARGIN;
y += LineHeight;
LineHeight = 0;
}
}
}
else
{
Free(bl);
bl = NULL;
nBlocks = 0;
ERR("Failed to alloc DOC_TEXTBLOCK structure!\n");
break;
}
n -= LineLen;
tx += LineLen;
}
else
{
n--;
}
}
if(nBlocks != 0)
{
Current->Blocks = bl;
}
}
SelectObject(hdc, hOldFont);
pRect->right = pRect->left + szDoc.cx;
pRect->bottom = pRect->top + szDoc.cy;
}
/***********************************************************************
* SYSLINK_Draw
* Draws the SysLink control.
*/
static LRESULT SYSLINK_Draw (const SYSLINK_INFO *infoPtr, HDC hdc)
{
RECT rc;
PDOC_ITEM Current;
HFONT hOldFont;
COLORREF OldTextColor, OldBkColor;
hOldFont = SelectObject(hdc, infoPtr->Font);
OldTextColor = SetTextColor(hdc, infoPtr->TextColor);
OldBkColor = SetBkColor(hdc, comctl32_color.clrBtnFace);
GetClientRect(infoPtr->Self, &rc);
rc.right -= SL_RIGHTMARGIN + SL_LEFTMARGIN;
rc.bottom -= SL_BOTTOMMARGIN + SL_TOPMARGIN;
if(rc.right < 0 || rc.bottom < 0) return 0;
for(Current = infoPtr->Items; Current != NULL; Current = Current->Next)
{
int n;
LPWSTR tx;
PDOC_TEXTBLOCK bl;
bl = Current->Blocks;
if(bl != NULL)
{
tx = Current->Text;
n = Current->nText;
if(Current->Type == slText)
{
SelectObject(hdc, infoPtr->Font);
SetTextColor(hdc, infoPtr->TextColor);
}
else
{
SelectObject(hdc, infoPtr->LinkFont);
SetTextColor(hdc, (!(Current->u.Link.state & LIS_VISITED) ? infoPtr->LinkColor : infoPtr->VisitedColor));
}
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)
{
COLORREF PrevTextColor;
PrevTextColor = SetTextColor(hdc, infoPtr->TextColor);
DrawFocusRect(hdc, &bl->rc);
SetTextColor(hdc, PrevTextColor);
}
tx += bl->nChars;
n -= bl->nChars + bl->nSkip;
bl++;
}
}
}
SetBkColor(hdc, OldBkColor);
SetTextColor(hdc, OldTextColor);
SelectObject(hdc, hOldFont);
return 0;
}
/***********************************************************************
* SYSLINK_Paint
* Handles the WM_PAINT message.
*/
static LRESULT SYSLINK_Paint (const SYSLINK_INFO *infoPtr, HDC hdcParam)
{
HDC hdc;
PAINTSTRUCT ps;
hdc = hdcParam ? hdcParam : BeginPaint (infoPtr->Self, &ps);
if (hdc)
{
SYSLINK_Draw (infoPtr, hdc);
if (!hdcParam) EndPaint (infoPtr->Self, &ps);
}
return 0;
}
/***********************************************************************
* SYSLINK_SetFont
* Set new Font for the SysLink control.
*/
static HFONT SYSLINK_SetFont (SYSLINK_INFO *infoPtr, HFONT hFont, BOOL bRedraw)
{
HDC hdc;
LOGFONTW lf;
TEXTMETRICW tm;
RECT rcClient;
HFONT hOldFont = infoPtr->Font;
infoPtr->Font = hFont;
/* free the underline font */
if(infoPtr->LinkFont != NULL)
{
DeleteObject(infoPtr->LinkFont);
infoPtr->LinkFont = NULL;
}
/* Render text position and word wrapping in memory */
if (GetClientRect(infoPtr->Self, &rcClient))
{
hdc = GetDC(infoPtr->Self);
if(hdc != NULL)
{
/* create a new underline font */
if(GetTextMetricsW(hdc, &tm) &&
GetObjectW(infoPtr->Font, sizeof(LOGFONTW), &lf))
{
lf.lfUnderline = TRUE;
infoPtr->LinkFont = CreateFontIndirectW(&lf);
infoPtr->BreakChar = tm.tmBreakChar;
}
else
{
ERR("Failed to create link font!\n");
}
SYSLINK_Render(infoPtr, hdc, &rcClient);
ReleaseDC(infoPtr->Self, hdc);
}
}
if(bRedraw)
{
RedrawWindow(infoPtr->Self, NULL, NULL, RDW_INVALIDATE | RDW_UPDATENOW);
}
return hOldFont;
}
/***********************************************************************
* SYSLINK_SetText
* Set new text for the SysLink control.
*/
static LRESULT SYSLINK_SetText (SYSLINK_INFO *infoPtr, LPCWSTR Text)
{
/* clear the document */
SYSLINK_ClearDoc(infoPtr);
if(Text == NULL || *Text == 0)
{
return TRUE;
}
/* let's parse the string and create a document */
if(SYSLINK_ParseText(infoPtr, Text) > 0)
{
RECT rcClient;
/* Render text position and word wrapping in memory */
if (GetClientRect(infoPtr->Self, &rcClient))
{
HDC hdc = GetDC(infoPtr->Self);
if (hdc != NULL)
{
SYSLINK_Render(infoPtr, hdc, &rcClient);
ReleaseDC(infoPtr->Self, hdc);
InvalidateRect(infoPtr->Self, NULL, TRUE);
}
}
}
return TRUE;
}
/***********************************************************************
* SYSLINK_SetFocusLink
* Updates the focus status bits and focusses the specified link.
* If no document item is specified, the focus bit will be removed from all links.
* Returns the previous focused item.
*/
static PDOC_ITEM SYSLINK_SetFocusLink (const SYSLINK_INFO *infoPtr, const DOC_ITEM *DocItem)
{
PDOC_ITEM Current, PrevFocus = NULL;
for(Current = infoPtr->Items; Current != NULL; Current = Current->Next)
{
if(Current->Type == slLink)
{
if((PrevFocus == NULL) && (Current->u.Link.state & LIS_FOCUSED))
{
PrevFocus = Current;
}
if(Current == DocItem)
{
Current->u.Link.state |= LIS_FOCUSED;
}
else
{
Current->u.Link.state &= ~LIS_FOCUSED;
}
}
}
return PrevFocus;
}
/***********************************************************************
* SYSLINK_SetItem
* Sets the states and attributes of a link item.
*/
static LRESULT SYSLINK_SetItem (const SYSLINK_INFO *infoPtr, const LITEM *Item)
{
PDOC_ITEM di;
int nc;
PWSTR szId = NULL;
PWSTR szUrl = NULL;
BOOL Repaint = FALSE;
if(!(Item->mask & LIF_ITEMINDEX) || !(Item->mask & (LIF_FLAGSMASK)))
{
ERR("Invalid Flags!\n");
return FALSE;
}
di = SYSLINK_GetLinkItemByIndex(infoPtr, Item->iLink);
if(di == NULL)
{
ERR("Link %d couldn't be found\n", Item->iLink);
return FALSE;
}
if(Item->mask & LIF_ITEMID)
{
nc = min(lstrlenW(Item->szID), MAX_LINKID_TEXT - 1);
szId = Alloc((nc + 1) * sizeof(WCHAR));
if(szId)
{
lstrcpynW(szId, Item->szID, nc + 1);
}
else
{
ERR("Unable to allocate memory for link id\n");
return FALSE;
}
}
if(Item->mask & LIF_URL)
{
nc = min(lstrlenW(Item->szUrl), L_MAX_URL_LENGTH - 1);
szUrl = Alloc((nc + 1) * sizeof(WCHAR));
if(szUrl)
{
lstrcpynW(szUrl, Item->szUrl, nc + 1);
}
else
{
Free(szId);
ERR("Unable to allocate memory for link url\n");
return FALSE;
}
}
if(Item->mask & LIF_ITEMID)
{
Free(di->u.Link.szID);
di->u.Link.szID = szId;
}
if(Item->mask & LIF_URL)
{
Free(di->u.Link.szUrl);
di->u.Link.szUrl = szUrl;
}
if(Item->mask & LIF_STATE)
{
UINT oldstate = di->u.Link.state;
/* clear the masked bits */
di->u.Link.state &= ~(Item->stateMask & LIS_MASK);
/* copy the bits */
di->u.Link.state |= (Item->state & Item->stateMask) & LIS_MASK;
Repaint = (oldstate != di->u.Link.state);
/* update the focus */
SYSLINK_SetFocusLink(infoPtr, ((di->u.Link.state & LIS_FOCUSED) ? di : NULL));
}
if(Repaint)
{
SYSLINK_RepaintLink(infoPtr, di);
}
return TRUE;
}
/***********************************************************************
* SYSLINK_GetItem
* Retrieves the states and attributes of a link item.
*/
static LRESULT SYSLINK_GetItem (const SYSLINK_INFO *infoPtr, PLITEM Item)
{
PDOC_ITEM di;
if(!(Item->mask & LIF_ITEMINDEX) || !(Item->mask & (LIF_FLAGSMASK)))
{
ERR("Invalid Flags!\n");
return FALSE;
}
di = SYSLINK_GetLinkItemByIndex(infoPtr, Item->iLink);
if(di == NULL)
{
ERR("Link %d couldn't be found\n", Item->iLink);
return FALSE;
}
if(Item->mask & LIF_STATE)
{
Item->state = (di->u.Link.state & Item->stateMask);
if(!infoPtr->HasFocus)
{
/* remove the LIS_FOCUSED bit if the control doesn't have focus */
Item->state &= ~LIS_FOCUSED;
}
}
if(Item->mask & LIF_ITEMID)
{
if(di->u.Link.szID)
{
lstrcpyW(Item->szID, di->u.Link.szID);
}
else
{
Item->szID[0] = 0;
}
}
if(Item->mask & LIF_URL)
{
if(di->u.Link.szUrl)
{
lstrcpyW(Item->szUrl, di->u.Link.szUrl);
}
else
{
Item->szUrl[0] = 0;
}
}
return TRUE;
}
/***********************************************************************
* SYSLINK_PtInDocItem
* Determines if a point is in the region of a document item
*/
static BOOL SYSLINK_PtInDocItem (const DOC_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.
*/
static LRESULT SYSLINK_HitTest (const SYSLINK_INFO *infoPtr, PLHITTESTINFO HitTest)
{
PDOC_ITEM Current;
int id = 0;
for(Current = infoPtr->Items; Current != NULL; Current = Current->Next)
{
if(Current->Type == slLink)
{
if(SYSLINK_PtInDocItem(Current, HitTest->pt))
{
HitTest->item.mask = 0;
HitTest->item.iLink = id;
HitTest->item.state = 0;
HitTest->item.stateMask = 0;
if(Current->u.Link.szID)
{
lstrcpyW(HitTest->item.szID, Current->u.Link.szID);
}
else
{
HitTest->item.szID[0] = 0;
}
if(Current->u.Link.szUrl)
{
lstrcpyW(HitTest->item.szUrl, Current->u.Link.szUrl);
}
else
{
HitTest->item.szUrl[0] = 0;
}
return TRUE;
}
id++;
}
}
return FALSE;
}
/***********************************************************************
* SYSLINK_GetIdealHeight
* Returns the preferred height of a link at the current control's width.
*/
static LRESULT SYSLINK_GetIdealHeight (const SYSLINK_INFO *infoPtr)
{
HDC hdc = GetDC(infoPtr->Self);
if(hdc != NULL)
{
LRESULT height;
TEXTMETRICW tm;
HGDIOBJ hOldFont = SelectObject(hdc, infoPtr->Font);
if(GetTextMetricsW(hdc, &tm))
{
height = tm.tmHeight;
}
else
{
height = 0;
}
SelectObject(hdc, hOldFont);
ReleaseDC(infoPtr->Self, hdc);
return height;
}
return 0;
}
/***********************************************************************
* SYSLINK_SendParentNotify
* Sends a WM_NOTIFY message to the parent window.
*/
static LRESULT SYSLINK_SendParentNotify (const SYSLINK_INFO *infoPtr, UINT code, const DOC_ITEM *Link, int iLink)
{
NMLINK nml;
nml.hdr.hwndFrom = infoPtr->Self;
nml.hdr.idFrom = GetWindowLongPtrW(infoPtr->Self, GWLP_ID);
nml.hdr.code = code;
nml.item.mask = 0;
nml.item.iLink = iLink;
nml.item.state = 0;
nml.item.stateMask = 0;
if(Link->u.Link.szID)
{
lstrcpyW(nml.item.szID, Link->u.Link.szID);
}
else
{
nml.item.szID[0] = 0;
}
if(Link->u.Link.szUrl)
{
lstrcpyW(nml.item.szUrl, Link->u.Link.szUrl);
}
else
{
nml.item.szUrl[0] = 0;
}
return SendMessageW(infoPtr->Notify, WM_NOTIFY, nml.hdr.idFrom, (LPARAM)&nml);
}
/***********************************************************************
* SYSLINK_SetFocus
* Handles receiving the input focus.
*/
static LRESULT SYSLINK_SetFocus (SYSLINK_INFO *infoPtr)
{
PDOC_ITEM Focus;
infoPtr->HasFocus = TRUE;
/* 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);
SYSLINK_RepaintLink(infoPtr, Focus);
}
return 0;
}
/***********************************************************************
* SYSLINK_KillFocus
* Handles losing the input focus.
*/
static LRESULT SYSLINK_KillFocus (SYSLINK_INFO *infoPtr)
{
PDOC_ITEM Focus;
infoPtr->HasFocus = FALSE;
Focus = SYSLINK_GetFocusLink(infoPtr, NULL);
if(Focus != NULL)
{
SYSLINK_RepaintLink(infoPtr, Focus);
}
return 0;
}
/***********************************************************************
* SYSLINK_LinkAtPt
* Returns a link at the specified position
*/
static PDOC_ITEM SYSLINK_LinkAtPt (const SYSLINK_INFO *infoPtr, const POINT *pt, int *LinkId, BOOL MustBeEnabled)
{
PDOC_ITEM Current;
int id = 0;
for(Current = infoPtr->Items; Current != NULL; Current = Current->Next)
{
if((Current->Type == slLink) && SYSLINK_PtInDocItem(Current, *pt) &&
(!MustBeEnabled || (MustBeEnabled && (Current->u.Link.state & LIS_ENABLED))))
{
if(LinkId != NULL)
{
*LinkId = id;
}
return Current;
}
id++;
}
return NULL;
}
/***********************************************************************
* SYSLINK_LButtonDown
* Handles mouse clicks
*/
static LRESULT SYSLINK_LButtonDown (SYSLINK_INFO *infoPtr, const POINT *pt)
{
PDOC_ITEM Current, Old;
int id;
Current = SYSLINK_LinkAtPt(infoPtr, pt, &id, TRUE);
if(Current != NULL)
{
SetFocus(infoPtr->Self);
Old = SYSLINK_SetFocusLink(infoPtr, Current);
if(Old != NULL && Old != Current)
{
SYSLINK_RepaintLink(infoPtr, Old);
}
infoPtr->MouseDownID = id;
SYSLINK_RepaintLink(infoPtr, Current);
}
return 0;
}
/***********************************************************************
* SYSLINK_LButtonUp
* Handles mouse clicks
*/
static LRESULT SYSLINK_LButtonUp (SYSLINK_INFO *infoPtr, const POINT *pt)
{
if(infoPtr->MouseDownID > -1)
{
PDOC_ITEM Current;
int id;
Current = SYSLINK_LinkAtPt(infoPtr, pt, &id, TRUE);
if((Current != NULL) && (Current->u.Link.state & LIS_FOCUSED) && (infoPtr->MouseDownID == id))
{
SYSLINK_SendParentNotify(infoPtr, NM_CLICK, Current, id);
}
}
infoPtr->MouseDownID = -1;
return 0;
}
/***********************************************************************
* SYSLINK_OnEnter
* Handles ENTER key events
*/
static BOOL SYSLINK_OnEnter (const SYSLINK_INFO *infoPtr)
{
if(infoPtr->HasFocus)
{
PDOC_ITEM Focus;
int id;
Focus = SYSLINK_GetFocusLink(infoPtr, &id);
if(Focus != NULL)
{
SYSLINK_SendParentNotify(infoPtr, NM_RETURN, Focus, id);
return TRUE;
}
}
return FALSE;
}
/***********************************************************************
* SYSKEY_SelectNextPrevLink
* Changes the currently focused link
*/
static BOOL SYSKEY_SelectNextPrevLink (const SYSLINK_INFO *infoPtr, BOOL Prev)
{
if(infoPtr->HasFocus)
{
PDOC_ITEM Focus;
int id;
Focus = SYSLINK_GetFocusLink(infoPtr, &id);
if(Focus != NULL)
{
PDOC_ITEM NewFocus, OldFocus;
if(Prev)
NewFocus = SYSLINK_GetPrevLink(infoPtr, Focus);
else
NewFocus = SYSLINK_GetNextLink(infoPtr, Focus);
if(NewFocus != NULL)
{
OldFocus = SYSLINK_SetFocusLink(infoPtr, NewFocus);
if(OldFocus && OldFocus != NewFocus)
{
SYSLINK_RepaintLink(infoPtr, OldFocus);
}
SYSLINK_RepaintLink(infoPtr, NewFocus);
return TRUE;
}
}
}
return FALSE;
}
/***********************************************************************
* SYSKEY_SelectNextPrevLink
* Determines if there's a next or previous link to decide whether the control
* should capture the tab key message
*/
static BOOL SYSLINK_NoNextLink (const SYSLINK_INFO *infoPtr, BOOL Prev)
{
PDOC_ITEM Focus, NewFocus;
Focus = SYSLINK_GetFocusLink(infoPtr, NULL);
if(Prev)
NewFocus = SYSLINK_GetPrevLink(infoPtr, Focus);
else
NewFocus = SYSLINK_GetNextLink(infoPtr, Focus);
return NewFocus == NULL;
}
/***********************************************************************
* SYSLINK_GetIdealSize
* Calculates the ideal size of a link control at a given maximum width.
*/
static VOID SYSLINK_GetIdealSize (const SYSLINK_INFO *infoPtr, int cxMaxWidth, LPSIZE lpSize)
{
RECT rc;
HDC hdc;
rc.left = rc.top = rc.bottom = 0;
rc.right = cxMaxWidth;
hdc = GetDC(infoPtr->Self);
if (hdc != NULL)
{
HGDIOBJ hOldFont = SelectObject(hdc, infoPtr->Font);
SYSLINK_Render(infoPtr, hdc, &rc);
SelectObject(hdc, hOldFont);
ReleaseDC(infoPtr->Self, hdc);
lpSize->cx = rc.right;
lpSize->cy = rc.bottom;
}
}
/***********************************************************************
* SysLinkWindowProc
*/
static LRESULT WINAPI SysLinkWindowProc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
SYSLINK_INFO *infoPtr;
TRACE("hwnd=%p msg=%04x wparam=%lx lParam=%lx\n", hwnd, message, wParam, lParam);
infoPtr = (SYSLINK_INFO *)GetWindowLongPtrW(hwnd, 0);
if (!infoPtr && message != WM_CREATE)
goto HandleDefaultMessage;
switch(message) {
case WM_PRINTCLIENT:
case WM_PAINT:
return SYSLINK_Paint (infoPtr, (HDC)wParam);
case WM_SETCURSOR:
{
LHITTESTINFO ht;
DWORD mp = GetMessagePos();
ht.pt.x = (short)LOWORD(mp);
ht.pt.y = (short)HIWORD(mp);
ScreenToClient(infoPtr->Self, &ht.pt);
if(SYSLINK_HitTest (infoPtr, &ht))
{
SetCursor(LoadCursorW(0, (LPCWSTR)IDC_HAND));
return TRUE;
}
/* let the default window proc handle this message */
goto HandleDefaultMessage;
}
case WM_SIZE:
{
RECT rcClient;
if (GetClientRect(infoPtr->Self, &rcClient))
{
HDC hdc = GetDC(infoPtr->Self);
if(hdc != NULL)
{
SYSLINK_Render(infoPtr, hdc, &rcClient);
ReleaseDC(infoPtr->Self, hdc);
}
}
return 0;
}
case WM_GETFONT:
return (LRESULT)infoPtr->Font;
case WM_SETFONT:
return (LRESULT)SYSLINK_SetFont(infoPtr, (HFONT)wParam, (BOOL)lParam);
case WM_SETTEXT:
SYSLINK_SetText(infoPtr, (LPWSTR)lParam);
goto HandleDefaultMessage;
case WM_LBUTTONDOWN:
{
POINT pt;
pt.x = (short)LOWORD(lParam);
pt.y = (short)HIWORD(lParam);
return SYSLINK_LButtonDown(infoPtr, &pt);
}
case WM_LBUTTONUP:
{
POINT pt;
pt.x = (short)LOWORD(lParam);
pt.y = (short)HIWORD(lParam);
return SYSLINK_LButtonUp(infoPtr, &pt);
}
case WM_KEYDOWN:
{
switch(wParam)
{
case VK_RETURN:
SYSLINK_OnEnter(infoPtr);
return 0;
case VK_TAB:
{
BOOL shift = GetKeyState(VK_SHIFT) & 0x8000;
SYSKEY_SelectNextPrevLink(infoPtr, shift);
return 0;
}
}
goto HandleDefaultMessage;
}
case WM_GETDLGCODE:
{
LRESULT Ret = DLGC_HASSETSEL;
int vk = (lParam != 0 ? (int)((LPMSG)lParam)->wParam : 0);
switch(vk)
{
case VK_RETURN:
Ret |= DLGC_WANTMESSAGE;
break;
case VK_TAB:
{
BOOL shift = GetKeyState(VK_SHIFT) & 0x8000;
if(!SYSLINK_NoNextLink(infoPtr, shift))
{
Ret |= DLGC_WANTTAB;
}
else
{
Ret |= DLGC_WANTCHARS;
}
break;
}
}
return Ret;
}
case WM_NCHITTEST:
{
POINT pt;
RECT rc;
pt.x = (short)LOWORD(lParam);
pt.y = (short)HIWORD(lParam);
GetClientRect(infoPtr->Self, &rc);
ScreenToClient(infoPtr->Self, &pt);
if(pt.x < 0 || pt.y < 0 || pt.x > rc.right || pt.y > rc.bottom)
{
return HTNOWHERE;
}
if(SYSLINK_LinkAtPt(infoPtr, &pt, NULL, FALSE))
{
return HTCLIENT;
}
return HTTRANSPARENT;
}
case LM_HITTEST:
return SYSLINK_HitTest(infoPtr, (PLHITTESTINFO)lParam);
case LM_SETITEM:
return SYSLINK_SetItem(infoPtr, (PLITEM)lParam);
case LM_GETITEM:
return SYSLINK_GetItem(infoPtr, (PLITEM)lParam);
case LM_GETIDEALHEIGHT:
if (lParam)
{
/* LM_GETIDEALSIZE */
SYSLINK_GetIdealSize(infoPtr, (int)wParam, (LPSIZE)lParam);
}
return SYSLINK_GetIdealHeight(infoPtr);
case WM_SETFOCUS:
return SYSLINK_SetFocus(infoPtr);
case WM_KILLFOCUS:
return SYSLINK_KillFocus(infoPtr);
case WM_ENABLE:
infoPtr->Style &= ~WS_DISABLED;
infoPtr->Style |= (wParam ? 0 : WS_DISABLED);
InvalidateRect (infoPtr->Self, NULL, FALSE);
return 0;
case WM_STYLECHANGED:
if (wParam == GWL_STYLE)
{
infoPtr->Style = ((LPSTYLESTRUCT)lParam)->styleNew;
InvalidateRect(infoPtr->Self, NULL, TRUE);
}
return 0;
case WM_CREATE:
/* allocate memory for info struct */
infoPtr = Alloc (sizeof(SYSLINK_INFO));
if (!infoPtr) return -1;
SetWindowLongPtrW (hwnd, 0, (DWORD_PTR)infoPtr);
/* initialize the info struct */
infoPtr->Self = hwnd;
infoPtr->Notify = ((LPCREATESTRUCTW)lParam)->hwndParent;
infoPtr->Style = ((LPCREATESTRUCTW)lParam)->style;
infoPtr->Font = 0;
infoPtr->LinkFont = 0;
infoPtr->Items = NULL;
infoPtr->HasFocus = FALSE;
infoPtr->MouseDownID = -1;
infoPtr->TextColor = comctl32_color.clrWindowText;
infoPtr->LinkColor = comctl32_color.clrHighlight;
infoPtr->VisitedColor = comctl32_color.clrHighlight;
infoPtr->BreakChar = ' ';
TRACE("SysLink Ctrl creation, hwnd=%p\n", hwnd);
SYSLINK_SetText(infoPtr, ((LPCREATESTRUCTW)lParam)->lpszName);
return 0;
case WM_DESTROY:
TRACE("SysLink Ctrl destruction, hwnd=%p\n", hwnd);
SYSLINK_ClearDoc(infoPtr);
if(infoPtr->Font != 0) DeleteObject(infoPtr->Font);
if(infoPtr->LinkFont != 0) DeleteObject(infoPtr->LinkFont);
SetWindowLongPtrW(hwnd, 0, 0);
Free (infoPtr);
return 0;
case WM_SYSCOLORCHANGE:
COMCTL32_RefreshSysColors();
return 0;
default:
HandleDefaultMessage:
if ((message >= WM_USER) && (message < WM_APP) && !COMCTL32_IsReflectedMessage(message))
{
ERR("unknown msg %04x wp=%04lx lp=%08lx\n", message, wParam, lParam );
}
return DefWindowProcW(hwnd, message, wParam, lParam);
}
}
/***********************************************************************
* SYSLINK_Register [Internal]
*
* Registers the SysLink window class.
*/
VOID SYSLINK_Register (void)
{
WNDCLASSW wndClass;
ZeroMemory (&wndClass, sizeof(wndClass));
wndClass.style = CS_GLOBALCLASS | CS_VREDRAW | CS_HREDRAW;
wndClass.lpfnWndProc = SysLinkWindowProc;
wndClass.cbClsExtra = 0;
wndClass.cbWndExtra = sizeof (SYSLINK_INFO *);
wndClass.hCursor = LoadCursorW (0, (LPWSTR)IDC_ARROW);
wndClass.lpszClassName = WC_LINK;
RegisterClassW (&wndClass);
}
/***********************************************************************
* SYSLINK_Unregister [Internal]
*
* Unregisters the SysLink window class.
*/
VOID SYSLINK_Unregister (void)
{
UnregisterClassW (WC_LINK, NULL);
}
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