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- Reimplementation of EM_LINELENGTH.

Browse Source 
- Some attempt at documentation of double-linked list of
  ME_DisplayItem's.
This commit is contained in:
Krzysztof Foltman 2005-09-29 10:30:50 +00:00 committed by Alexandre Julliard
parent 7f8614bbd4
commit ed8379d1ad
4 changed files with 22 additions and 13 deletions
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18
dlls/riched20/editor.c
View File

@ -1623,7 +1623,7 @@ LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lP
case EM_LINELENGTH:
{
ME_DisplayItem *item, *item_end;
int nChars = 0;
int nChars = 0, nThisLineOfs = 0, nNextLineOfs = 0;
if (wParam > ME_GetTextLength(editor))
return 0;
@ -1634,17 +1634,13 @@ LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lP
}
item = ME_FindItemAtOffset(editor, diRun, wParam, NULL);
item = ME_RowStart(item);
item_end = ME_RowEnd(item);
if (!item_end)
{
/* Empty buffer, no runs */
nChars = 0;
}
nThisLineOfs = ME_CharOfsFromRunOfs(editor, ME_FindItemFwd(item, diRun), 0);
item_end = ME_FindItemFwd(item, diStartRow);
if (item_end)
nNextLineOfs = ME_CharOfsFromRunOfs(editor, ME_FindItemFwd(item_end, diRun), 0);
else
{
nChars = ME_CharOfsFromRunOfs(editor, item_end, ME_StrLen(item_end->member.run.strText));
nChars -= ME_CharOfsFromRunOfs(editor, item, 0);
}
nNextLineOfs = ME_FindItemFwd(item, diParagraphOrEnd)->member.para.nCharOfs-1;
nChars = nNextLineOfs - nThisLineOfs;
TRACE("EM_LINELENGTH(%d)==%d\n",wParam, nChars);
return nChars;
}

2
dlls/riched20/editor.h
View File

@ -98,7 +98,7 @@ int ME_ReverseFindWhitespaceV(ME_String *s, int nVChar);
/* row.c */
ME_DisplayItem *ME_FindRowStart(ME_Context *c, ME_DisplayItem *run, int nRelPos);
ME_DisplayItem *ME_RowStart(ME_DisplayItem *item);
ME_DisplayItem *ME_RowEnd(ME_DisplayItem *item);
/* ME_DisplayItem *ME_RowEnd(ME_DisplayItem *item); */
void ME_RenumberParagraphs(ME_DisplayItem *item); /* TODO */
ME_DisplayItem *ME_FindRowWithNumber(ME_TextEditor *editor, int nRow);
int ME_RowNumberFromCharOfs(ME_TextEditor *editor, int nOfs);

12
dlls/riched20/editstr.h
View File

@ -161,6 +161,18 @@ typedef struct tagME_Row
int nYPos;
} ME_Row;
/* the display item list layout is like this:
* - the document consists of paragraphs
* - each paragraph contains at least one run, the last run in the paragraph
* is an end-of-paragraph run
* - each formatted paragraph contains at least one row, which corresponds
* to a screen line (that's why there are no rows in an unformatted
* paragraph
* - the paragraphs contain "shortcut" pointers to the previous and the next
* paragraph, that makes iteration over paragraphs faster
* - the list starts with diTextStart and ends with diTextEnd
*/
typedef struct tagME_DisplayItem
{
ME_DIType type;

3
dlls/riched20/row.c
View File

@ -77,12 +77,13 @@ ME_DisplayItem *ME_RowStart(ME_DisplayItem *item) {
return ME_FindItemBackOrHere(item, diStartRow);
}
/*
ME_DisplayItem *ME_RowEnd(ME_DisplayItem *item) {
ME_DisplayItem *item2 = ME_FindItemFwd(item, diStartRowOrParagraphOrEnd);
if (!item2) return NULL;
return ME_FindItemBack(item, diRun);
}
*/
ME_DisplayItem *
ME_FindRowWithNumber(ME_TextEditor *editor, int nRow)