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author | fvogel <fvogelnew1@free.fr> | 2016-01-11 13:23:20 (GMT) |
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committer | fvogel <fvogelnew1@free.fr> | 2016-01-11 13:23:20 (GMT) |
commit | ddae56bbd0023f29a24d0529ed4fa0e3820ce7f2 (patch) | |
tree | 87dfd77a94fb45488edde792e3b0735459a1fea7 /generic/tkTextIndex.c | |
parent | 5c01788dc22a4a2f8e6d9e943dc61a5b73b28291 (diff) | |
parent | 4a2efd946fe6674e460172920d097f7329d8e5d9 (diff) | |
download | tk-ddae56bbd0023f29a24d0529ed4fa0e3820ce7f2.zip tk-ddae56bbd0023f29a24d0529ed4fa0e3820ce7f2.tar.gz tk-ddae56bbd0023f29a24d0529ed4fa0e3820ce7f2.tar.bz2 |
merged trunk
Diffstat (limited to 'generic/tkTextIndex.c')
-rw-r--r-- | generic/tkTextIndex.c | 112 |
1 files changed, 104 insertions, 8 deletions
diff --git a/generic/tkTextIndex.c b/generic/tkTextIndex.c index 55a4907..8820191 100644 --- a/generic/tkTextIndex.c +++ b/generic/tkTextIndex.c @@ -40,6 +40,9 @@ static const char * StartEnd(TkText *textPtr, const char *string, static int GetIndex(Tcl_Interp *interp, TkSharedText *sharedPtr, TkText *textPtr, const char *string, TkTextIndex *indexPtr, int *canCachePtr); +static int IndexCountBytesOrdered(CONST TkText *textPtr, + CONST TkTextIndex *indexPtr1, + CONST TkTextIndex *indexPtr2); /* * The "textindex" Tcl_Obj definition: @@ -759,11 +762,11 @@ GetIndex( } if (TkTextWindowIndex(textPtr, string, indexPtr) != 0) { - return TCL_OK; + goto done; } if (TkTextImageIndex(textPtr, string, indexPtr) != 0) { - return TCL_OK; + goto done; } /* @@ -1616,6 +1619,90 @@ TkTextIndexForwChars( /* *--------------------------------------------------------------------------- * + * TkTextIndexCountBytes -- + * + * Given a pair of indices in a text widget, this function counts how + * many bytes are between the two indices. The two indices do not need + * to be ordered. + * + * Results: + * The number of bytes in the given range. + * + * Side effects: + * None. + * + *--------------------------------------------------------------------------- + */ + +int +TkTextIndexCountBytes( + CONST TkText *textPtr, + CONST TkTextIndex *indexPtr1, /* Index describing one location. */ + CONST TkTextIndex *indexPtr2) /* Index describing second location. */ +{ + int compare = TkTextIndexCmp(indexPtr1, indexPtr2); + + if (compare == 0) { + return 0; + } else if (compare > 0) { + return IndexCountBytesOrdered(textPtr, indexPtr2, indexPtr1); + } else { + return IndexCountBytesOrdered(textPtr, indexPtr1, indexPtr2); + } +} + +static int +IndexCountBytesOrdered( + CONST TkText *textPtr, + CONST TkTextIndex *indexPtr1, + /* Index describing location of character from + * which to count. */ + CONST TkTextIndex *indexPtr2) + /* Index describing location of last character + * at which to stop the count. */ +{ + int byteCount, offset; + TkTextSegment *segPtr, *segPtr1; + TkTextLine *linePtr; + + if (indexPtr1->linePtr == indexPtr2->linePtr) { + return indexPtr2->byteIndex - indexPtr1->byteIndex; + } + + /* + * indexPtr2 is on a line strictly after the line containing indexPtr1. + * Add up: + * bytes between indexPtr1 and end of its line + * bytes in lines strictly between indexPtr1 and indexPtr2 + * bytes between start of the indexPtr2 line and indexPtr2 + */ + + segPtr1 = TkTextIndexToSeg(indexPtr1, &offset); + byteCount = -offset; + for (segPtr = segPtr1; segPtr != NULL; segPtr = segPtr->nextPtr) { + byteCount += segPtr->size; + } + + linePtr = TkBTreeNextLine(textPtr, indexPtr1->linePtr); + while (linePtr != indexPtr2->linePtr) { + for (segPtr = linePtr->segPtr; segPtr != NULL; + segPtr = segPtr->nextPtr) { + byteCount += segPtr->size; + } + linePtr = TkBTreeNextLine(textPtr, linePtr); + if (linePtr == NULL) { + Tcl_Panic("TextIndexCountBytesOrdered ran out of lines"); + } + } + + byteCount += indexPtr2->byteIndex; + + return byteCount; +} + +/* + *--------------------------------------------------------------------------- + * * TkTextIndexCount -- * * Given an ordered pair of indices in a text widget, this function @@ -2118,7 +2205,7 @@ StartEnd( TkText *textPtr, /* Information about text widget. */ const char *string, /* String to parse for additional info about * modifier (count and units). Points to first - * character of modifer word. */ + * character of modifier word. */ TkTextIndex *indexPtr) /* Index to modify based on string. */ { const char *p; @@ -2240,7 +2327,7 @@ StartEnd( int offset; if (modifier == TKINDEX_DISPLAY) { - TkTextIndexForwChars(NULL, indexPtr, 0, indexPtr, + TkTextIndexForwChars(textPtr, indexPtr, 0, indexPtr, COUNT_DISPLAY_INDICES); } @@ -2269,11 +2356,20 @@ StartEnd( } firstChar = 0; } - offset -= chSize; - indexPtr->byteIndex -= chSize; + if (offset == 0) { + if (modifier == TKINDEX_DISPLAY) { + TkTextIndexBackChars(textPtr, indexPtr, 1, indexPtr, + COUNT_DISPLAY_INDICES); + } else { + TkTextIndexBackChars(NULL, indexPtr, 1, indexPtr, + COUNT_INDICES); + } + } else { + indexPtr->byteIndex -= chSize; + } + offset -= chSize; if (offset < 0) { - if (indexPtr->byteIndex < 0) { - indexPtr->byteIndex = 0; + if (indexPtr->byteIndex == 0) { goto done; } segPtr = TkTextIndexToSeg(indexPtr, &offset); |