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riched20: Added short descriptions to functions in run.c, just in case
anybody had any doubts about what they actually do.
This commit is contained in:
Krzysztof Foltman
Alexandre Julliard
parent
8380e1b2d2
commit
9dd276bfd1
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@ -27,6 +27,11 @@ WINE_DEFAULT_DEBUG_CHANNEL(richedit);
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WINE_DECLARE_DEBUG_CHANNEL(richedit_check);
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WINE_DECLARE_DEBUG_CHANNEL(richedit_lists);
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/******************************************************************************
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* ME_CanJoinRuns
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*
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* Returns 1 if two runs can be safely merged into one, 0 otherwise.
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*/
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int ME_CanJoinRuns(ME_Run *run1, ME_Run *run2)
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{
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if ((run1->nFlags | run2->nFlags) & MERF_NOJOIN)
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@ -45,8 +50,18 @@ void ME_SkipAndPropagateCharOffset(ME_DisplayItem *p, int shift)
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ME_PropagateCharOffset(p, shift);
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}
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/******************************************************************************
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* ME_PropagateCharOffsets
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*
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* Shifts (increases or decreases) character offset (relative to beginning of
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* the document) of the part of the text starting from given place.
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*/
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void ME_PropagateCharOffset(ME_DisplayItem *p, int shift)
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{
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/* Runs in one paragraph contain character offset relative to their owning
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* paragraph. If we start the shifting from the run, we need to shift
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* all the relative offsets until the end of the paragraph
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*/
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if (p->type == diRun) /* propagate in all runs in this para */
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{
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TRACE("PropagateCharOffset(%s, %d)\n", debugstr_w(p->member.run.strText->szData), shift);
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@ -56,6 +71,10 @@ void ME_PropagateCharOffset(ME_DisplayItem *p, int shift)
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p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
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} while(p->type == diRun);
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}
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/* Runs in next paragraphs don't need their offsets updated, because they,
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* again, those offsets are relative to their respective paragraphs.
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* Instead of that, we're updating paragraphs' character offsets.
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*/
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if (p->type == diParagraph) /* propagate in all next paras */
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{
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do {
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@ -64,6 +83,9 @@ void ME_PropagateCharOffset(ME_DisplayItem *p, int shift)
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p = p->member.para.next_para;
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} while(p->type == diParagraph);
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}
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/* diTextEnd also has character offset in it, which makes finding text length
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* easier. But it needs to be up to date first.
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*/
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if (p->type == diTextEnd)
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{
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p->member.para.nCharOfs += shift;
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@ -71,6 +93,11 @@ void ME_PropagateCharOffset(ME_DisplayItem *p, int shift)
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}
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}
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/******************************************************************************
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* ME_CheckCharOffsets
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*
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* Checks if editor lists' validity and optionally dumps the document structure
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*/
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void ME_CheckCharOffsets(ME_TextEditor *editor)
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{
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ME_DisplayItem *p = editor->pBuffer->pFirst;
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@ -111,6 +138,13 @@ void ME_CheckCharOffsets(ME_TextEditor *editor)
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} while(1);
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}
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/******************************************************************************
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* ME_CharOfsFromRunOfs
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*
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* Converts a character position relative to the start of the run, to a
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* character position relative to the start of the document.
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* Kind of a "local to global" offset conversion.
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*/
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int ME_CharOfsFromRunOfs(ME_TextEditor *editor, ME_DisplayItem *pRun, int nOfs)
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{
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ME_DisplayItem *pPara;
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@ -125,11 +159,25 @@ int ME_CharOfsFromRunOfs(ME_TextEditor *editor, ME_DisplayItem *pRun, int nOfs)
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+ ME_VPosToPos(pRun->member.run.strText, nOfs);
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}
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/******************************************************************************
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* ME_CursorFromCharOfs
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*
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* Converts a character offset (relative to the start of the document) to
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* a cursor structure (which contains a run and a position relative to that
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* run).
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*/
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void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
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{
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ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pRun, &pCursor->nOffset);
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}
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/******************************************************************************
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* ME_RunOfsFromCharOfs
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*
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* Find a run and relative character offset given an absolute character offset
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* (absolute offset being an offset relative to the start of the document).
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* Kind of a "global to local" offset conversion.
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*/
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void ME_RunOfsFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem **ppRun, int *pOfs)
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{
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ME_DisplayItem *pPara;
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@ -176,6 +224,11 @@ void ME_RunOfsFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem **
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assert((*ppRun)->member.run.nFlags & MERF_ENDPARA);
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}
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/******************************************************************************
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* ME_JoinRuns
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*
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* Merges two adjacent runs, the one given as a parameter and the next one.
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*/
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void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
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{
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ME_DisplayItem *pNext = p->next;
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@ -184,8 +237,11 @@ void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
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assert(p->member.run.nCharOfs != -1);
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ME_GetParagraph(p)->member.para.nFlags |= MEPF_REWRAP;
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if (editor->bCaretAtEnd && editor->pCursors[0].pRun == pNext)
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/* if we were at the end of screen line, and the next run is in the new
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* line, then it's not the end of the line anymore */
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if (editor->bCaretAtEnd && editor->pCursors[0].pRun == pNext)
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editor->bCaretAtEnd = FALSE;
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/* Update all cursors so that they don't contain the soon deleted run */
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for (i=0; i<editor->nCursors; i++) {
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if (editor->pCursors[i].pRun == pNext) {
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editor->pCursors[i].pRun = p;
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@ -205,6 +261,12 @@ void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
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}
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}
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/******************************************************************************
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* ME_SplitRun
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*
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* Splits a run into two in a given place. It also updates the screen position
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* and size (extent) of the newly generated runs.
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*/
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ME_DisplayItem *ME_SplitRun(ME_Context *c, ME_DisplayItem *item, int nVChar)
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{
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ME_TextEditor *editor = c->editor;
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@ -248,7 +310,12 @@ ME_DisplayItem *ME_SplitRun(ME_Context *c, ME_DisplayItem *item, int nVChar)
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return item2;
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}
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/* split a run starting from voffset */
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/******************************************************************************
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* ME_SplitRunSimple
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*
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* Does the most basic job of splitting a run into two - it does not
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* update the positions and extents.
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*/
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ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_DisplayItem *item, int nVChar)
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{
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ME_Run *run = &item->member.run;
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@ -283,6 +350,11 @@ ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_DisplayItem *item, i
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return item2;
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}
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/******************************************************************************
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* ME_MakeRun
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*
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* A helper function to create run structures quickly.
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*/
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ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
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{
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ME_DisplayItem *item = ME_MakeDI(diRun);
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@ -294,7 +366,11 @@ ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
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return item;
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}
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/******************************************************************************
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* ME_InsertRun
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*
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* Inserts a run at a given character position (offset).
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*/
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ME_DisplayItem *ME_InsertRun(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem *pItem)
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{
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ME_Cursor tmp;
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@ -311,6 +387,13 @@ ME_DisplayItem *ME_InsertRun(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem
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return pDI;
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}
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/******************************************************************************
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* ME_InsertRunAtCursor
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*
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* Inserts a new run with given style, flags and content at a given position,
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* which is passed as a cursor structure (which consists of a run and
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* a run-relative character offset).
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*/
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ME_DisplayItem *
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ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
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const WCHAR *str, int len, int flags)
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@ -319,6 +402,8 @@ ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
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ME_UndoItem *pUI;
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if (cursor->nOffset) {
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/* We're inserting at the middle of the existing run, which means that
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* that run must be split. It isn't always necessary, but */
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cursor->pRun = ME_SplitRunSimple(editor, cursor->pRun, cursor->nOffset);
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cursor->nOffset = 0;
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}
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@ -339,6 +424,13 @@ ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
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return pDI;
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}
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/******************************************************************************
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* ME_UpdateRunFlags
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*
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* Determine some of run attributes given its content (style, text content).
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* Some flags cannot be determined by this function (MERF_GRAPHICS,
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* MERF_ENDPARA)
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*/
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void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
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{
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assert(run->nCharOfs != -1);
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@ -375,6 +467,12 @@ void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
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run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
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}
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/******************************************************************************
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* ME_GetGraphicsSize
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*
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* Sets run extent for graphics runs. This functionality is just a placeholder
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* for future OLE object support, and will be removed.
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*/
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void ME_GetGraphicsSize(ME_TextEditor *editor, ME_Run *run, SIZE *pSize)
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{
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assert(run->nFlags & MERF_GRAPHICS);
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@ -382,6 +480,13 @@ void ME_GetGraphicsSize(ME_TextEditor *editor, ME_Run *run, SIZE *pSize)
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pSize->cy = 64;
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}
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/******************************************************************************
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* ME_CharFromPoint
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*
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* Returns a character position inside the run given a run-relative
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* pixel horizontal position. This version rounds left (ie. if the second
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* character is at pixel position 8, then for cx=0..7 it returns 0).
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*/
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int ME_CharFromPoint(ME_TextEditor *editor, int cx, ME_Run *run)
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{
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int fit = 0;
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@ -393,7 +498,7 @@ int ME_CharFromPoint(ME_TextEditor *editor, int cx, ME_Run *run)
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if (run->nFlags & (MERF_TAB | MERF_CELL))
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{
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if (cx < run->nWidth/2)
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if (cx < run->nWidth/2)
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return 0;
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return 1;
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}
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@ -414,6 +519,17 @@ int ME_CharFromPoint(ME_TextEditor *editor, int cx, ME_Run *run)
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return fit;
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}
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/******************************************************************************
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* ME_CharFromPointCursor
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*
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* Returns a character position inside the run given a run-relative
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* pixel horizontal position. This version rounds to the nearest character edge
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* (ie. if the second character is at pixel position 8, then for cx=0..3
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* it returns 0, and for cx=4..7 it returns 1).
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*
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* It is used for mouse click handling, for better usability (and compatibility
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* with the native control).
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*/
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int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run)
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{
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int fit = 0, fit1 = 0;
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@ -457,6 +573,12 @@ int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run)
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return fit;
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}
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/******************************************************************************
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* ME_PointFromChar
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*
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* Returns a run-relative pixel position given a run-relative character
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* position (character offset)
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*/
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int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset)
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{
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SIZE size;
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@ -476,6 +598,11 @@ int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset)
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return size.cx;
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}
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/******************************************************************************
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* ME_GetTextExtent
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*
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* Finds a width and a height of the text using a specified style
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*/
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void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s,
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SIZE *size)
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{
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@ -486,6 +613,12 @@ void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s,
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ME_UnselectStyleFont(c->editor, hDC, s, hOldFont);
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}
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/******************************************************************************
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* ME_GetRunSizeCommon
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*
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* Finds width, height, ascent and descent of a run, up to given character
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* (nLen).
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*/
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SIZE ME_GetRunSizeCommon(ME_Context *c, ME_Paragraph *para, ME_Run *run, int nLen, int *pAscent, int *pDescent)
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{
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SIZE size;
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@ -545,12 +678,25 @@ SIZE ME_GetRunSizeCommon(ME_Context *c, ME_Paragraph *para, ME_Run *run, int nLe
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return size;
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}
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/******************************************************************************
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* ME_GetRunSize
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*
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* Finds width and height (but not ascent and descent) of a part of the run
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* up to given character.
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*/
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SIZE ME_GetRunSize(ME_Context *c, ME_Paragraph *para, ME_Run *run, int nLen)
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{
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int asc, desc;
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return ME_GetRunSizeCommon(c, para, run, nLen, &asc, &desc);
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}
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/******************************************************************************
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* ME_CalcRunExtent
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*
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* Updates the size of the run (fills width, ascent and descent). The height
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* is calculated based on whole row's ascent and descent anyway, so no need
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* to use it here.
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*/
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void ME_CalcRunExtent(ME_Context *c, ME_Paragraph *para, ME_Run *run)
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{
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if (run->nFlags & MERF_HIDDEN)
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@ -565,12 +711,24 @@ void ME_CalcRunExtent(ME_Context *c, ME_Paragraph *para, ME_Run *run)
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}
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}
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/******************************************************************************
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* ME_MustBeWrapped
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*
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* This should ensure that the given paragraph is wrapped so that its screen
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* row structure may be used. But it doesn't, yet.
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*/
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void ME_MustBeWrapped(ME_Context *c, ME_DisplayItem *para)
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{
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assert(para->type == diParagraph);
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/* FIXME */
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}
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/******************************************************************************
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* ME_SetSelectionCharFormat
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*
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* Applies a style change, either to a current selection, or to insert cursor
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* (ie. the style next typed characters will use).
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*/
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void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
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{
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int nFrom, nTo;
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@ -588,6 +746,11 @@ void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
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ME_SetCharFormat(editor, nFrom, nTo-nFrom, pFmt);
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}
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/******************************************************************************
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* ME_SetCharFormat
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*
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* Applies a style change to the specified part of the text
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*/
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void ME_SetCharFormat(ME_TextEditor *editor, int nOfs, int nChars, CHARFORMAT2W *pFmt)
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{
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ME_Cursor tmp, tmp2;
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@ -632,6 +795,11 @@ void ME_SetCharFormat(ME_TextEditor *editor, int nOfs, int nChars, CHARFORMAT2W
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}
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}
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/******************************************************************************
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* ME_SetDefaultCharFormat
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*
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* Applies a style change to the default character style.
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*/
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void ME_SetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *mod)
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{
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ME_Style *style;
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@ -658,6 +826,12 @@ void ME_GetRunCharFormat(ME_TextEditor *editor, ME_DisplayItem *run, CHARFORMAT2
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ME_CopyCharFormat(pFmt, &run->member.run.style->fmt);
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}
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/******************************************************************************
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* ME_GetDefaultCharFormat
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*
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* Retrieves the current default character style (the one applied where no
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* other style was applied) .
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*/
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void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
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{
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int nFrom, nTo;
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@ -665,6 +839,12 @@ void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
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ME_CopyCharFormat(pFmt, &editor->pBuffer->pDefaultStyle->fmt);
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}
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/******************************************************************************
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* ME_GetSelectionCharFormat
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*
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* If selection exists, it returns all style elements that are set consistently
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* in the whole selection. If not, it just returns the current style.
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*/
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void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
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{
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int nFrom, nTo;
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@ -677,6 +857,12 @@ void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
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ME_GetCharFormat(editor, nFrom, nTo, pFmt);
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}
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/******************************************************************************
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* ME_GetCharFormat
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*
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* Returns the style consisting of those attributes which are consistently set
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* in the whole character range.
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*/
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void ME_GetCharFormat(ME_TextEditor *editor, int nFrom, int nTo, CHARFORMAT2W *pFmt)
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{
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ME_DisplayItem *run, *run_end;
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