/******************************************************************************
* ME_MakeRun
*
* A helper function to create run structures quickly.
*/
ME_DisplayItem *ME_MakeRun(ME_Style *s, int nFlags)
{
ME_DisplayItem *item = ME_MakeDI(diRun);
item->member.run.style = s;
item->member.run.ole_obj = NULL;
item->member.run.nFlags = nFlags;
item->member.run.nCharOfs = -1;
item->member.run.len = 0;
item->member.run.para = NULL;
ME_AddRefStyle(s);
return item;
}
ME_Style *ME_GetInsertStyle(ME_TextEditor *editor, int nCursor) {
if (ME_IsSelection(editor))
{
ME_Cursor c;
int from, to;
ME_GetSelection(editor, &from, &to);
ME_CursorFromCharOfs(editor, from, &c);
ME_AddRefStyle(c.pRun->member.run.style);
return c.pRun->member.run.style;
}
if (editor->pBuffer->pCharStyle) {
ME_AddRefStyle(editor->pBuffer->pCharStyle);
return editor->pBuffer->pCharStyle;
}
else
{
ME_Cursor *pCursor = &editor->pCursors[nCursor];
ME_DisplayItem *pRunItem = pCursor->pRun;
ME_DisplayItem *pPrevItem = NULL;
if (pCursor->nOffset) {
ME_Run *pRun = &pRunItem->member.run;
ME_AddRefStyle(pRun->style);
return pRun->style;
}
pPrevItem = ME_FindItemBack(pRunItem, diRunOrParagraph);
if (pPrevItem->type == diRun)
{
ME_AddRefStyle(pPrevItem->member.run.style);
return pPrevItem->member.run.style;
}
else
{
ME_AddRefStyle(pRunItem->member.run.style);
return pRunItem->member.run.style;
}
}
}
ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
{
ME_Style *style;
int from, to;
ME_GetSelection(editor, &from, &to);
if (from != to) {
ME_Cursor c;
ME_CursorFromCharOfs(editor, from, &c);
style = c.pRun->member.run.style;
ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
}
else
style = ME_GetInsertStyle(editor, 0);
return style;
}
/******************************************************************************
* ME_MakeRun
*
* A helper function to create run structures quickly.
*/
ME_DisplayItem *ME_MakeRun(ME_Style *s, int nFlags)
{
ME_DisplayItem *item = ME_MakeDI(diRun);
item->member.run.style = s;
item->member.run.ole_obj = NULL;
item->member.run.nFlags = nFlags;
item->member.run.nCharOfs = -1;
item->member.run.len = 0;
item->member.run.para = NULL;
item->member.run.num_glyphs = 0;
item->member.run.max_glyphs = 0;
item->member.run.glyphs = NULL;
item->member.run.vis_attrs = NULL;
item->member.run.advances = NULL;
item->member.run.offsets = NULL;
item->member.run.max_clusters = 0;
item->member.run.clusters = NULL;
ME_AddRefStyle(s);
return item;
}
ME_UndoItem *ME_AddUndoItem(ME_TextEditor *editor, ME_DIType type, const ME_DisplayItem *pdi) {
if (editor->nUndoMode == umIgnore)
return NULL;
else if (editor->nUndoLimit == 0)
return NULL;
else
{
ME_DisplayItem *pItem = (ME_DisplayItem *)ALLOC_OBJ(ME_UndoItem);
((ME_UndoItem *)pItem)->nCR = ((ME_UndoItem *)pItem)->nLF = -1;
switch(type)
{
case diUndoPotentialEndTransaction:
/* only should be added for manually typed chars, not undos or redos */
assert(editor->nUndoMode == umAddToUndo);
/* intentional fall-through to next case */
case diUndoEndTransaction:
break;
case diUndoSetParagraphFormat:
assert(pdi);
pItem->member.para = pdi->member.para;
pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
*pItem->member.para.pFmt = *pdi->member.para.pFmt;
break;
case diUndoInsertRun:
assert(pdi);
pItem->member.run = pdi->member.run;
pItem->member.run.strText = ME_StrDup(pItem->member.run.strText);
ME_AddRefStyle(pItem->member.run.style);
if (pdi->member.run.ole_obj)
{
pItem->member.run.ole_obj = ALLOC_OBJ(*pItem->member.run.ole_obj);
ME_CopyReObject(pItem->member.run.ole_obj, pdi->member.run.ole_obj);
}
else pItem->member.run.ole_obj = NULL;
break;
case diUndoSetCharFormat:
break;
case diUndoDeleteRun:
case diUndoJoinParagraphs:
break;
case diUndoSplitParagraph:
{
ME_DisplayItem *prev_para = pdi->member.para.prev_para;
assert(pdi->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
pItem->member.para.pFmt->cbSize = sizeof(PARAFORMAT2);
pItem->member.para.pFmt->dwMask = 0;
*pItem->member.para.pFmt = *pdi->member.para.pFmt;
pItem->member.para.border = pdi->member.para.border;
pItem->member.para.nFlags = prev_para->member.para.nFlags & ~MEPF_CELL;
pItem->member.para.pCell = NULL;
break;
}
default:
assert(0 == "AddUndoItem, unsupported item type");
return NULL;
}
pItem->type = type;
pItem->prev = NULL;
if (editor->nUndoMode == umAddToUndo || editor->nUndoMode == umAddBackToUndo)
{
if (editor->pUndoStack
&& editor->pUndoStack->type == diUndoPotentialEndTransaction)
{
editor->pUndoStack->type = diUndoEndTransaction;
}
if (editor->nUndoMode == umAddToUndo)
TRACE("Pushing id=%s to undo stack, deleting redo stack\n", ME_GetDITypeName(type));
else
TRACE("Pushing id=%s to undo stack\n", ME_GetDITypeName(type));
pItem->next = editor->pUndoStack;
if (type == diUndoEndTransaction || type == diUndoPotentialEndTransaction)
editor->nUndoStackSize++;
if (editor->pUndoStack)
editor->pUndoStack->prev = pItem;
else
editor->pUndoStackBottom = pItem;
editor->pUndoStack = pItem;
if (editor->nUndoStackSize > editor->nUndoLimit)
{ /* remove oldest undo from stack */
ME_DisplayItem *p = editor->pUndoStackBottom;
while (p->type !=diUndoEndTransaction)
p = p->prev; /*find new stack bottom */
editor->pUndoStackBottom = p->prev;
editor->pUndoStackBottom->next = NULL;
do
{
ME_DisplayItem *pp = p->next;
ME_DestroyDisplayItem(p);
p = pp;
} while (p);
editor->nUndoStackSize--;
}
/* any new operation (not redo) clears the redo stack */
if (editor->nUndoMode == umAddToUndo) {
ME_DisplayItem *p = editor->pRedoStack;
while(p)
{
ME_DisplayItem *pp = p->next;
ME_DestroyDisplayItem(p);
p = pp;
}
editor->pRedoStack = NULL;
}
}
else if (editor->nUndoMode == umAddToRedo)
{
TRACE("Pushing id=%s to redo stack\n", ME_GetDITypeName(type));
pItem->next = editor->pRedoStack;
if (editor->pRedoStack)
editor->pRedoStack->prev = pItem;
editor->pRedoStack = pItem;
}
else
assert(0);
return (ME_UndoItem *)pItem;
}
}
ME_UndoItem *ME_AddUndoItem(ME_TextEditor *editor, ME_DIType type, ME_DisplayItem *pdi) {
if (editor->nUndoMode == umIgnore)
return NULL;
else if (editor->nUndoLimit == 0)
return NULL;
else
{
ME_DisplayItem *pItem = (ME_DisplayItem *)ALLOC_OBJ(ME_UndoItem);
switch(type)
{
case diUndoEndTransaction:
break;
case diUndoSetParagraphFormat:
assert(pdi);
CopyMemory(&pItem->member.para, &pdi->member.para, sizeof(ME_Paragraph));
pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
CopyMemory(pItem->member.para.pFmt, pdi->member.para.pFmt, sizeof(PARAFORMAT2));
break;
case diUndoInsertRun:
assert(pdi);
CopyMemory(&pItem->member.run, &pdi->member.run, sizeof(ME_Run));
pItem->member.run.strText = ME_StrDup(pItem->member.run.strText);
ME_AddRefStyle(pItem->member.run.style);
break;
case diUndoSetCharFormat:
case diUndoSetDefaultCharFormat:
break;
case diUndoDeleteRun:
case diUndoJoinParagraphs:
break;
case diUndoSplitParagraph:
pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
pItem->member.para.pFmt->cbSize = sizeof(PARAFORMAT2);
pItem->member.para.pFmt->dwMask = 0;
break;
default:
assert(0 == "AddUndoItem, unsupported item type");
return NULL;
}
pItem->type = type;
pItem->prev = NULL;
if (editor->nUndoMode == umAddToUndo || editor->nUndoMode == umAddBackToUndo)
{
if (editor->nUndoMode == umAddToUndo)
TRACE("Pushing id=%s to undo stack, deleting redo stack\n", ME_GetDITypeName(type));
else
TRACE("Pushing id=%s to undo stack\n", ME_GetDITypeName(type));
pItem->next = editor->pUndoStack;
if (type == diUndoEndTransaction)
editor->nUndoStackSize++;
if (editor->pUndoStack)
editor->pUndoStack->prev = pItem;
else
editor->pUndoStackBottom = pItem;
editor->pUndoStack = pItem;
if (editor->nUndoStackSize > editor->nUndoLimit)
{ /* remove oldest undo from stack */
ME_DisplayItem *p = editor->pUndoStackBottom;
while (p->type !=diUndoEndTransaction)
p = p->prev; /*find new stack bottom */
editor->pUndoStackBottom = p->prev;
editor->pUndoStackBottom->next = NULL;
do
{
ME_DisplayItem *pp = p->next;
ME_DestroyDisplayItem(p);
p = pp;
} while (p);
editor->nUndoStackSize--;
}
/* any new operation (not redo) clears the redo stack */
if (editor->nUndoMode == umAddToUndo) {
ME_DisplayItem *p = editor->pRedoStack;
while(p)
{
ME_DisplayItem *pp = p->next;
ME_DestroyDisplayItem(p);
p = pp;
}
editor->pRedoStack = NULL;
}
}
else if (editor->nUndoMode == umAddToRedo)
{
TRACE("Pushing id=%s to redo stack\n", ME_GetDITypeName(type));
pItem->next = editor->pRedoStack;
if (editor->pRedoStack)
editor->pRedoStack->prev = pItem;
editor->pRedoStack = pItem;
}
else
assert(0);
return (ME_UndoItem *)pItem;
}
}