netscape-revival
lib/layout/layedit.c
/* -*- Mode: C; tab-width: 4; tabs-indent-mode: t -*- */
/* Moved here so we can expose 2 functions outside of ifdef EDITOR */
#include "xp.h"
#include "layout.h"
#ifdef EDITOR
/* define LAYEDIT so LO_RelayoutData is not defined. */
#define LAYEDIT 1
typedef struct LO_RelayoutData_struct LO_RelayoutData;
#include "pa_parse.h"
#include "edt.h"
#include "libi18n.h"
#ifdef max
#undef max
#endif
#define max(a, b) (((a) > (b)) ? (a) : (b))
struct LO_RelayoutData_struct {
MWContext *context;
ED_TagCursor* pTagCursor;
lo_TopState* top_state;
lo_DocState* old_state;
lo_DocState* new_state;
int32 iStartLine;
int iStartEditOffset;
};
#define LINE_INC 100
#ifdef XP_WIN16
#define SIZE_LIMIT 32000
void lo_GrowLineArrayByOneForWin16( lo_DocState *state, intn lineNum)
{
/* This code is a modified version of the lo_FlushLineList
* that grows the line array to hold more lines.
*/
intn a_size;
intn a_indx;
intn a_line;
XP_Block *larray_array;
LO_Element **line_array;
a_size = SIZE_LIMIT / sizeof(LO_Element *);
a_indx = (lineNum - 1) / a_size;
a_line = lineNum - (a_indx * a_size);
XP_LOCK_BLOCK(larray_array, XP_Block *, state->larray_array);
state->line_array = larray_array[a_indx];
if (a_line == a_size)
{
state->line_array = XP_ALLOC_BLOCK(LINE_INC *
sizeof(LO_Element *));
if (state->line_array == NULL)
{
XP_UNLOCK_BLOCK(state->larray_array);
state->top_state->out_of_memory = TRUE;
return;
}
XP_LOCK_BLOCK(line_array, LO_Element **, state->line_array);
line_array[0] = NULL;
XP_UNLOCK_BLOCK(state->line_array);
state->line_array_size = LINE_INC;
state->larray_array_size++;
XP_UNLOCK_BLOCK(state->larray_array);
state->larray_array = XP_REALLOC_BLOCK(
state->larray_array, (state->larray_array_size
* sizeof(XP_Block)));
if (state->larray_array == NULL)
{
state->top_state->out_of_memory = TRUE;
return;
}
XP_LOCK_BLOCK(larray_array, XP_Block *, state->larray_array);
larray_array[state->larray_array_size - 1] = state->line_array;
state->line_array = larray_array[a_indx];
}
else if (a_line >= state->line_array_size)
{
state->line_array_size += LINE_INC;
if (state->line_array_size > a_size)
{
state->line_array_size = (intn)a_size;
}
state->line_array = XP_REALLOC_BLOCK(state->line_array,
(state->line_array_size * sizeof(LO_Element *)));
if (state->line_array == NULL)
{
XP_UNLOCK_BLOCK(state->larray_array);
state->top_state->out_of_memory = TRUE;
return;
}
larray_array[a_indx] = state->line_array;
}
/*
* Place this line of elements into the line array.
*/
XP_LOCK_BLOCK(line_array, LO_Element **, state->line_array);
line_array[a_line - 1] = state->line_list;
XP_UNLOCK_BLOCK(state->line_array);
XP_UNLOCK_BLOCK(state->larray_array);
}
#endif
Bool lo_GrowLineArray( lo_DocState *state, int32 iMaxLines )
{
/* This code is a modified version of the lo_FlushLineList
* that grows the line array to hold more lines.
*/
#ifdef XP_WIN16
intn linenum = state->line_array_size;
while ( iMaxLines > linenum){
lo_GrowLineArrayByOneForWin16(state, linenum);
if ( state->top_state->out_of_memory == TRUE)
{
return FALSE;
}
linenum++;
}
#else
int32 line_inc = 0;
while ( iMaxLines > state->line_array_size + line_inc)
{
if (state->line_array_size > (LINE_INC * 10))
{
line_inc += state->line_array_size / 10;
}
else
{
line_inc += LINE_INC;
}
}
if ( line_inc != 0 )
{
state->line_array = XP_REALLOC_BLOCK(state->line_array,
((state->line_array_size + line_inc) *
sizeof(LO_Element *)));
if (state->line_array == NULL)
{
state->top_state->out_of_memory = TRUE;
return FALSE;
}
state->line_array_size += line_inc;
}
#endif
return TRUE;
}
void lo_MergeStateMoveElement(LO_Element* eptr, int32 yDelta, int32* pEle_id);
void lo_MergeStateMoveCell(LO_CellStruct* cellPtr, int32 yDelta, int32* pEle_id)
{
/* Like lo_ShiftCell, only we also renumber the element ids. */
LO_Element* eptr;
for( eptr = cellPtr->cell_list;
eptr;
eptr = eptr->lo_any.next)
{
lo_MergeStateMoveElement(eptr, yDelta, pEle_id);
}
for( eptr = cellPtr->cell_float_list;
eptr;
eptr = eptr->lo_any.next)
{
lo_MergeStateMoveElement(eptr, yDelta, pEle_id);
}
}
void lo_MergeStateMoveElement(LO_Element* eptr, int32 yDelta, int32* pEle_id)
{
eptr->lo_any.ele_id = (*pEle_id)++;
eptr->lo_any.y += yDelta;
/* Descend into cells */
if ( eptr->type == LO_CELL )
{
lo_MergeStateMoveCell(&eptr->lo_cell, yDelta, pEle_id);
}
}
void lo_MergeState( MWContext *context, lo_DocState *old_state, int32 iStartLine,
int32 iEndLine, lo_DocState *new_state, int32* pRetY, int32* pRetHeight )
{
LO_Element **old_line_array, **new_line_array;
LO_Element *prev_element, *start_element, *eptr, *end_element, *new_end_element;
int32 yDelta;
int32 ele_id;
int32 new_line_num;
int32 new_changed_line_count;
int32 old_changed_line_count;
int32 old_delta;
int32 old_lines_to_move;
Bool relayout_to_end;
Bool old_state_empty = (old_state->line_num < 2);
new_changed_line_count = new_state->line_num-1;
old_changed_line_count = iEndLine-iStartLine;
new_line_num = old_state->line_num - old_changed_line_count +
new_changed_line_count;
/*
* Grow the line array if we need to.
*/
if( !lo_GrowLineArray( old_state, new_line_num+1 ) )
{
return; /* oh shit, out of memory */
}
/* lock down the line array and copy the lines from the new_state into the
* old state.
*/
XP_LOCK_BLOCK(old_line_array, LO_Element **, old_state->line_array);
XP_LOCK_BLOCK(new_line_array, LO_Element **, new_state->line_array);
if( iEndLine == old_state->line_num-1 ){
/* ERIC: help! */
/* There is something very wrong here. We the layout engine is
* telling us the wrong line count. Force the end by stuffing
* a zero
*/
/*XP_ASSERT( old_line_array[iEndLine] == 0 );*/
old_line_array[iEndLine] = 0;
}
start_element = old_line_array[iStartLine];
end_element = old_line_array[iEndLine];
relayout_to_end = ( end_element == 0 );
/*
* Break the chain so when we recycle these elements they don't continue
* and deallocate the entire tree.
*/
if( end_element && end_element->lo_any.prev){
end_element->lo_any.prev->lo_any.next = 0;
}
/*
* Shrink or grow the the old line array. XP_BCOPY is supposed to handle
* overlaps.
*/
old_delta = new_changed_line_count - old_changed_line_count;
old_lines_to_move = (old_state->line_num-1) - iEndLine;
XP_BCOPY( &old_line_array[iEndLine], &old_line_array[iEndLine+old_delta],
sizeof(LO_Element*)*old_lines_to_move );
old_state->line_num = new_line_num;
/* if we shrunk the line array, make sure it is 0 filled
*/
if( old_delta < 0 ){
XP_BZERO( &old_line_array[iEndLine+old_delta+old_lines_to_move],
sizeof(LO_Element**)*(old_delta * -1) );
}
if( !old_state_empty ) {
*pRetY = start_element->lo_any.y;
}
else {
*pRetY = 0;
}
if( iStartLine != 0 )
{
prev_element = start_element->lo_any.prev;
}
else {
prev_element = 0;
}
if( new_changed_line_count ){
if( !old_state_empty )
{
yDelta = start_element->lo_any.y - new_line_array[0]->lo_any.y;
ele_id = start_element->lo_any.ele_id;
}
else {
yDelta = 0;
ele_id = 0;
}
XP_BCOPY( &new_line_array[0], &old_line_array[iStartLine],
sizeof(LO_Element*)*new_changed_line_count );
if( prev_element )
{
prev_element->lo_any.next = old_line_array[iStartLine];
old_line_array[iStartLine]->lo_any.prev = prev_element;
}
eptr = old_line_array[iStartLine];
while( eptr != NULL)
{
lo_MergeStateMoveElement(eptr, yDelta, &ele_id);
new_end_element = eptr;
eptr = eptr->lo_any.next;
}
}
else {
yDelta = 0;
if( !old_state_empty )
{
ele_id = start_element->lo_any.ele_id;
}
else
{
ele_id = 0;
}
new_end_element = prev_element;
}
/*
* We now have to patch the the bottom of the newly generated tags into
* the old tags.
*
*/
if( relayout_to_end == FALSE )
{
end_element->lo_any.prev = new_end_element;
new_end_element->lo_any.next = end_element;
yDelta = (new_end_element->lo_any.y+new_end_element->lo_any.line_height)
- end_element->lo_any.y;
ele_id = new_end_element->lo_any.ele_id+1;
eptr = end_element;
while( eptr != NULL)
{
lo_MergeStateMoveElement(eptr, yDelta, &ele_id);
eptr = eptr->lo_any.next;
}
}
else
{
/* trivia: The -2 is because lines are 1 based, and new_line_num is one
* more than the allocated number of lines. The array is zero based.
* So subtract 1 to get the count zero based, and another 1 to get the
* last allocated line rather than the first un-allocated line.
*/
if( !old_state_empty )
{
eptr = old_line_array[new_line_num - 2];
}
else
{
eptr = new_end_element;
}
/* move to the last element of the last line line */
while( eptr != NULL && eptr->lo_any.next != NULL)
{
eptr = eptr->lo_any.next;
}
old_state->end_last_line = eptr;
}
if( new_changed_line_count )
{
if( yDelta == 0 && !relayout_to_end )
{
eptr = new_end_element;
*pRetHeight = eptr->lo_any.y - *pRetY + eptr->lo_any.line_height;
}
else
{
/* the last line in the document. */
*pRetHeight = -1;
}
eptr = old_line_array[new_line_num-2];
/* We need to add a few pixels to the new line width so that
* there's always room for the cursor at the end of the line,
* even if there's a scroll bar.
*
* JPNote: We never, ever, shrink the width of the document once
* we've enlarged it. This is bad.
*/
#define max(a, b) (((a) > (b)) ? (a) : (b))
old_state->max_width = max( old_state->max_width, new_state->max_width + 20 );
#undef max
FE_SetDocDimension(context, FE_VIEW, old_state->max_width,
eptr->lo_any.y +eptr->lo_any.line_height);
}
else
{
eptr = start_element;
if( eptr )
{
*pRetHeight = eptr->lo_any.y - *pRetY + eptr->lo_any.line_height;
}
else
{
*pRetHeight = -1;
}
}
#if 0
XP_TRACE(( "line count = %d, end pointer = %d\n",
new_line_num, old_line_array[new_line_num-2] ));
XP_ASSERT( old_line_array[new_line_num-2] != 0 );
#endif
XP_UNLOCK_BLOCK(new_state->line_array);
XP_UNLOCK_BLOCK(old_state->line_array);
/* LTNOTE: need to recycle element chain from start_element
*/
if( start_element )
{
lo_relayout_recycle(context, old_state, start_element);
}
#ifdef DEBUG
lo_VerifyLayout(context);
#endif /* DEBUG */
}
LO_RelayoutData* lo_NewRelayoutData( MWContext* context, ED_TagCursor* pCursor,
int32 iStartLine, int iStartEditOffset )
{
int32 doc_id;
LO_RelayoutData *pRd;
pRd = XP_NEW( LO_RelayoutData );
if( pRd == 0 )
{
return 0;
}
pRd->pTagCursor = pCursor;
pRd->context = context;
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
doc_id = XP_DOCID(context);
pRd->top_state = lo_FetchTopState(doc_id);
if ((pRd->top_state == NULL)||(pRd->top_state->doc_state == NULL))
{
return 0;
}
pRd->old_state = pRd->top_state->doc_state;
pRd->iStartLine = iStartLine;
pRd->iStartEditOffset = iStartEditOffset;
pRd->new_state = lo_NewLayout( context, pRd->old_state->win_width,
pRd->old_state->win_height, pRd->old_state->win_left,
pRd->old_state->win_top, pRd->old_state );
pRd->new_state->display_blocked = TRUE;
pRd->new_state->edit_relayout_display_blocked = TRUE;
return pRd;
}
void lo_FreeRelayoutData( MWContext* context, LO_RelayoutData* pRd)
{
if ( pRd ) {
if ( pRd->new_state ) {
lo_DocState* state = pRd->new_state;
/*
* If there is a blocking element, we'll get into trouble later.
* Check if CEditImageElement::FinishedLoad is being called.
*/
XP_ASSERT ( state->top_state->layout_blocking_element == NULL );
lo_FreeLayoutData(context, state);
lo_InternalDiscardDocument(context, state, NULL, FALSE);
}
XP_FREE(pRd);
}
}
void LO_Relayout(MWContext *context, ED_TagCursor *pCursor,
int32 iStartLine, int iStartEditOffset, XP_Bool bDisplayTables)
{
PA_Tag *pTag;
PA_Tag *pNextTag = 0;
LO_Element *eptr;
LO_Element **line_array;
int32 changedY, changedHeight;
LO_RelayoutData* pRd;
Bool bFoundBreak, bBreakIsEndTag;
int32 iEndLine = -1;
pRd = lo_NewRelayoutData( context, pCursor, iStartLine, iStartEditOffset );
/* We need to keep images loaded during relayout. Images are reference counted.
* When the total number of layout elements that use an image drops to zero,
* the image is kicked out of the cache. We have to have the images in the cache,
* or else the layout engine will start an asynchronous load. The asynchronous load
* is bad because we don't have any way of waiting for it to complete. And that in
* turn means we would have to leave LO_Relayout with an inconsistent CEditElement /
* LO_Element state.
*
* Here's how there might come to be elements on the float list: When the document has
* right-aligned images, they are placed on the float list during the original load.
*
* Happily, there's a way around this problem: We make sure we don't delete the old
* image tags until we've created the new image tags. That's why we use lo_relayout_recycle,
* which puts the image elements on the "trash" list of pRd->new_state. Then we clean the
* trash in lo_InternalDiscardDocument.
*
*/
/* save the floating element list for later deletion. */
if( pRd->old_state->float_list != 0 )
{
lo_relayout_recycle(context, pRd->new_state, pRd->old_state->float_list);
pRd->old_state->float_list = NULL;
}
while( (pTag = pNextTag) != 0
|| (pTag = EDT_TagCursorGetNextState(pCursor)) != 0 )
{
lo_LayoutTag(pRd->context, pRd->new_state, pTag);
pNextTag = pTag->next;
PA_FreeTag(pTag);
}
eptr = NULL;
XP_LOCK_BLOCK(line_array, LO_Element **, pRd->new_state->line_array);
eptr = line_array[0];
if (eptr != NULL )
{
lo_relayout_recycle(context, pRd->new_state, eptr);
}
XP_UNLOCK_BLOCK(pRd->old_state->line_array);
if ( pRd->new_state->line_list ) {
lo_relayout_recycle(context, pRd->new_state, pRd->new_state->line_list);
}
pRd->new_state->line_list = NULL;
pRd->new_state->line_num = 1;
/* while there are tags to parse... */
bFoundBreak = FALSE;
pNextTag = NULL;
while( !bFoundBreak )
{
if( pNextTag == NULL )
{
pTag = EDT_TagCursorGetNext(pRd->pTagCursor);
}
else
{
pTag = pNextTag;
}
if( pTag == NULL ){
break;
}
pRd->new_state->display_blocked = TRUE;
pNextTag = pTag->next;
if( iStartEditOffset && pTag->type == P_TEXT )
{
pRd->new_state->edit_current_offset = iStartEditOffset;
pRd->new_state->edit_force_offset = TRUE;
lo_LayoutTag(pRd->context, pRd->new_state, pTag);
iStartEditOffset = 0;
pRd->new_state->edit_force_offset = FALSE;
PA_FreeTag(pTag);
}
else
{
/* lo_LayoutTag(pRd->context, pRd->new_state, pTag);*/
/* Matches code at end of LO_ProcessTag */
lo_DocState *state = pRd->new_state;
lo_DocState *orig_state;
lo_DocState *up_state;
PA_Tag* tag = pTag;
/*
* Divert all tags to the current sub-document if there is one.
*/
up_state = NULL;
orig_state = state;
if ( bDisplayTables ) {
while (state->sub_state != NULL)
{
lo_DocState *new_state;
up_state = state;
new_state = state->sub_state;
state = new_state;
}
}
/* orig_state->top_state->layout_status = status; */
{
lo_DocState *tmp_state;
Bool may_save;
if ((state->is_a_subdoc == SUBDOC_CELL)||
(state->is_a_subdoc == SUBDOC_CAPTION))
{
may_save = TRUE;
}
else
{
may_save = FALSE;
}
/* Some table routines reach out to find the top doc state.
* So we replace it for the duration of this call.
*/
pRd->top_state->doc_state = pRd->new_state;
state->edit_relayout_display_blocked = TRUE;
state->display_blocked = TRUE;
lo_LayoutTag(context, state, tag);
pRd->top_state->doc_state = pRd->old_state;
tmp_state = lo_CurrentSubState(orig_state);
if (may_save != FALSE)
{
/*
* That tag popped us up one state level. If this new
* state is still a subdoc, save the tag there.
*/
if (tmp_state == up_state)
{
if ((tmp_state->is_a_subdoc == SUBDOC_CELL)||
(tmp_state->is_a_subdoc == SUBDOC_CAPTION))
{
lo_SaveSubdocTags(context, tmp_state, tag);
}
else
{
PA_FreeTag(tag);
}
}
/*
* Else that tag put us in a new subdoc on the same
* level. It needs to be saved one level up,
* if the parent is also a subdoc.
*/
else if ((up_state != NULL)&&
(tmp_state == up_state->sub_state)&&
(tmp_state != state))
{
if ((up_state->is_a_subdoc == SUBDOC_CELL)||
(up_state->is_a_subdoc == SUBDOC_CAPTION))
{
lo_SaveSubdocTags(context, up_state, tag);
}
else
{
PA_FreeTag(tag);
}
}
/*
* Else we are still in the same subdoc
*/
else if (tmp_state == state)
{
lo_SaveSubdocTags(context, state, tag);
}
/*
* Else that tag started a new, nested subdoc.
* Add the starting tag to the parent.
*/
else if (tmp_state == state->sub_state)
{
lo_SaveSubdocTags(context, state, tag);
/*
* Since we have extended the parent chain,
* we need to reset the child to the new
* parent end-chain.
*/
if ((tmp_state->is_a_subdoc == SUBDOC_CELL)||
(tmp_state->is_a_subdoc == SUBDOC_CAPTION))
{
tmp_state->subdoc_tags =
state->subdoc_tags_end;
}
}
/*
* This can never happen.
*/
else
{
PA_FreeTag(tag);
}
state = tmp_state;
}
else
{
PA_FreeTag(tag);
}
}
}
/* pNextTag = pTag->next;
PA_FreeTag(pTag);
*/ if( pNextTag == 0 ){
bFoundBreak = EDT_TagCursorAtBreak( pRd->pTagCursor, &bBreakIsEndTag );
}
}
if( bFoundBreak )
{
if( bBreakIsEndTag ){
pTag = EDT_TagCursorGetNext(pRd->pTagCursor);
lo_LayoutTag(pRd->context, pRd->new_state, pTag);
iEndLine = EDT_TagCursorCurrentLine( pRd->pTagCursor );
}
else {
iEndLine = EDT_TagCursorCurrentLine( pRd->pTagCursor );
pTag = EDT_TagCursorGetNext(pRd->pTagCursor);
lo_LayoutTag(pRd->context, pRd->new_state, pTag);
}
PA_FreeTag(pTag);
/* don't close layout. We just flushed this line to the proper
* height, there is a start of a new tag in the buffer.
*/
}
else {
lo_CloseOutLayout( pRd->context, pRd->new_state);
}
if( iEndLine == -1 ){
iEndLine = pRd->old_state->line_num-1;
}
lo_MergeState( context, pRd->old_state, iStartLine, iEndLine,
pRd->new_state, &changedY, &changedHeight );
/* top_state->doc_state = new_state; */
/* LTNOTE:need to destroy the new state */
/* kill the current state */
/*
FE_ClearView( context, FE_VIEW );
lo_RefreshDocumentArea( context, state, 0, 0,new_state->win_width,
new_state->win_height);
*/
/* Free the layout */
lo_FreeRelayoutData(context, pRd);
FE_DocumentChanged( context, changedY, changedHeight );
}
Bool lo_MovePosition( MWContext *pContext,
LO_Element *pElement, intn iOffset,
ED_Element **ppEdElement, intn* pOffset, Bool bForward)
{
int32 iOffset32 = iOffset; /* Really should use a sythetic type for offsets. */
Bool bResult = LO_ComputeNewPosition( pContext, LO_NA_CHARACTER,
FALSE, FALSE, bForward, &pElement, &iOffset32);
iOffset = (intn) iOffset32;
#if 0
lo_TopState* top_state;
lo_DocState *state;
Bool bResult;
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
top_state = lo_FetchTopState(XP_DOCID(pContext));
if ((top_state == NULL)||(top_state->doc_state == NULL))
{
return FALSE;
}
state = top_state->doc_state;
bResult = LO_ComputeNewPosition( pContext, LO_NA_CHARACTER,
FALSE, FALSE, bForward, &pElement, &iOffset);
bResult = lo_BumpEditablePosition(pContext, state, &pElement, &iOffset, bForward);
#endif
if ( bResult ) {
*ppEdElement = pElement->lo_any.edit_element;
*pOffset = pElement->lo_any.edit_offset+iOffset;
}
return bResult;
}
Bool LO_PreviousPosition( MWContext *pContext,
LO_Element *pElement, intn iOffset,
ED_Element **ppEdElement, intn* pOffset)
{
return lo_MovePosition(pContext, pElement, iOffset,
ppEdElement, pOffset, FALSE);
}
Bool LO_NextPosition( MWContext *pContext,
LO_Element *pElement, intn iOffset,
ED_Element **ppEdElement, intn* pOffset)
{
return lo_MovePosition( pContext, pElement, iOffset,
ppEdElement, pOffset, TRUE);
}
/*
* Find the first text element on a line.
*/
LO_Element* LO_FirstElementOnLine( MWContext *pContext, int32 x, int32 y,
int32* pLineNum )
{
lo_TopState* top_state;
lo_DocState *state;
int32 iLine;
LO_Element **line_array, *pElement;
Bool bFound = FALSE;
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
top_state = lo_FetchTopState(XP_DOCID(pContext));
if ((top_state == NULL)||(top_state->doc_state == NULL))
{
return 0;
}
state = top_state->doc_state;
XP_LOCK_BLOCK(line_array, LO_Element **, state->line_array);
/* find the line we are currently on */
iLine = lo_PointToLine( pContext, state, x, y);
if( pLineNum ){
*pLineNum = iLine;
}
pElement = line_array[iLine];
while( !bFound )
{
/* if we've found a text element. We've for sure, found the line. */
if( lo_EditableElement( pElement->type ) && pElement->lo_any.edit_element != 0 ){
bFound = TRUE;
}
else {
pElement = pElement->lo_any.next;
}
}
XP_UNLOCK_BLOCK(state->line_array);
return pElement;
}
/*
* Find the first text element on a line.
*/
LO_Element* LO_LastElementOnLine( MWContext *pContext, int32 x, int32 y,
int32* pLineNum )
{
lo_TopState* top_state;
lo_DocState *state;
int32 iLine;
LO_Element **line_array, *pElement, *pFoundElement, *pEnd;
Bool bFound = FALSE;
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
top_state = lo_FetchTopState(XP_DOCID(pContext));
if ((top_state == NULL)||(top_state->doc_state == NULL))
{
return 0;
}
state = top_state->doc_state;
XP_LOCK_BLOCK(line_array, LO_Element **, state->line_array);
/* find the line we are currently on */
iLine = lo_PointToLine( pContext, state, x, y);
if( pLineNum ){
*pLineNum = iLine;
}
pElement = line_array[iLine];
pFoundElement = 0;
if( iLine == state->line_num-2 ){
pEnd = NULL;
}
else {
pEnd = line_array[iLine+1];
}
while( pElement != pEnd )
{
/* if we've found a text element. We've for sure, found the line. */
if( pElement->type == LO_TEXT ){
pFoundElement = pElement;
}
pElement = pElement->lo_any.next;
}
XP_UNLOCK_BLOCK(state->line_array);
return pFoundElement;
}
LO_Element* LO_BeginOfLine( MWContext *pContext, LO_Element *pElement){
LO_Element *pFirst = LO_FirstElementOnLine( pContext, pElement->lo_any.x,
pElement->lo_any.y, 0 );
return pFirst;
}
LO_Element* LO_EndOfLine( MWContext *pContext, LO_Element *pElement ){
LO_Element *pLast = LO_LastElementOnLine( pContext, pElement->lo_any.x,
pElement->lo_any.y, 0 );
return pLast;
}
void LO_PositionCaretBounded(MWContext *context, int32 x, int32 y,
int32 minY, int32 maxY )
{
int32 doc_id;
lo_TopState *top_state;
lo_DocState *state;
int32 retX, retY;
int32 iLine;
int dir = 0;
Bool bFound = FALSE;
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
doc_id = XP_DOCID(context);
top_state = lo_FetchTopState(doc_id);
if ((top_state == NULL)||(top_state->doc_state == NULL))
{
return;
}
state = top_state->doc_state;
iLine = lo_PointToLine( context, state, x, y );
#define FORWARD 1
#define BACKWARD 2
while( iLine >= 0 && iLine < state->line_num -2 && !bFound)
{
bFound = lo_FindBestPositionOnLine( context, state, iLine, x, y, dir == FORWARD, &retX, &retY );
if( bFound && dir != BACKWARD && retY < minY ){
iLine++;
dir = FORWARD;
bFound = FALSE;
}
else if ( bFound && dir != FORWARD && retY > maxY ){
iLine--;
dir = BACKWARD;
bFound = FALSE;
}
}
if( bFound ){
LO_PositionCaret( context, retX, retY );
}
}
void LO_Resize( MWContext *pContext ){
}
void LO_RefetchWindowDimensions( MWContext *pContext ){
int32 doc_id;
lo_TopState *top_state;
lo_DocState *state;
int32 topX,topY, winWidth, winHeight;
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
doc_id = XP_DOCID(pContext);
top_state = lo_FetchTopState(doc_id);
if ((top_state == NULL)||(top_state->doc_state == NULL))
{
return;
}
state = top_state->doc_state;
FE_GetDocAndWindowPosition( pContext, &topX, &topY, &winWidth, &winHeight );
state->win_width = winWidth;
state->win_height = winHeight;
}
#ifdef DEBUG
Bool
lo_VerifyList( MWContext *pContext, lo_TopState* top_state,
lo_DocState* state,
LO_Element* start,
LO_Element* end,
LO_Element* floating,
Bool print)
{
Bool result = TRUE;
LO_Element *eptr;
LO_Element *prev;
int32 index;
int32 elementID;
prev = NULL;
index = 0;
elementID = -1;
for ( eptr = start; eptr; eptr = eptr->lo_any.next )
{
if ( print )
{
int16 type;
const char* typeString;
const char* kTypeStrings[] = {"LO_UNKNOWN",
"LO_NONE",
"LO_TEXT",
"LO_LINEFEED",
"LO_HRULE",
"LO_IMAGE",
"LO_BULLET",
"LO_FORM_ELE",
"LO_SUBDOC",
"LO_TABLE",
"LO_CELL",
"LO_EMBED",
"LO_EDGE",
"LO_JAVA" };
type = eptr->lo_any.type;
if ( type < LO_UNKNOWN || type > LO_JAVA ) typeString = "Illegal type";
else typeString = kTypeStrings[type + 1];
XP_TRACE(("[%d] 0x%08x type %s(%d) ele_id %d",
index, eptr, typeString, type, eptr->lo_any.ele_id));
XP_TRACE((" position %d,%d size %d, %d offset %d, %d",
eptr->lo_any.x,
eptr->lo_any.y,
eptr->lo_any.width,
eptr->lo_any.height,
eptr->lo_any.x_offset,
eptr->lo_any.y_offset));
#ifdef EDITOR
XP_TRACE((" edit_element 0x%08x edit_offset %d",
eptr->lo_any.edit_element,
eptr->lo_any.edit_offset));
#endif
switch ( type )
{
case LO_TEXT:
{
char* text;
XP_LOCK_BLOCK(text, char *, eptr->lo_text.text);
XP_TRACE((" text \"%s\"", text));
XP_UNLOCK_BLOCK(eptr->lo_text.text);
}
break;
case LO_LINEFEED:
{
XP_TRACE((" break_type \"%d\"",
eptr->lo_linefeed.break_type));
}
break;
case LO_FORM_ELE:
{
const struct LO_FormElementStruct_struct* form;
const char* kFormTypeNames[] = {
"FORM_TYPE_NONE",
"FORM_TYPE_TEXT",
"FORM_TYPE_RADIO",
"FORM_TYPE_CHECKBOX",
"FORM_TYPE_HIDDEN",
"FORM_TYPE_SUBMIT",
"FORM_TYPE_RESET",
"FORM_TYPE_PASSWORD",
"FORM_TYPE_BUTTON",
"FORM_TYPE_JOT",
"FORM_TYPE_SELECT_ONE",
"FORM_TYPE_SELECT_MULT",
"FORM_TYPE_TEXTAREA",
"FORM_TYPE_ISINDEX",
"FORM_TYPE_IMAGE",
"FORM_TYPE_FILE",
"FORM_TYPE_KEYGEN",
"FORM_TYPE_READONLY"
};
const char* formTypeName;
int16 form_id;
form = & eptr->lo_form;
form_id = form->form_id;
formTypeName = "Unknown";
if ( form_id >= FORM_TYPE_NONE && form_id <= FORM_TYPE_READONLY ) {
formTypeName = kFormTypeNames[form_id];
}
XP_TRACE((" form_id %s(%d)", formTypeName, form_id));
XP_TRACE((" element_index %d baseline %d sel (%d,%d)",
form->element_index, form->baseline, form->sel_start,
form->sel_end));
}
break;
case LO_CELL:
{
const LO_CellStruct* cell
= & eptr->lo_cell;
lo_VerifyList(pContext, top_state, state,
cell->cell_list,
cell->cell_list_end,
cell->cell_float_list, print);
}
break;
case LO_SUBDOC:
{
}
break;
default:
break;
}
}
/*
* Check next/prev pointer consistency
*/
if ( eptr->lo_any.prev != prev )
{
XP_TRACE(("element %ld at address 0x%08x has a bad prev pointer.",
index, eptr));
XP_TRACE((" prev is 0x%08x , should be 0x%08x.",
eptr->lo_any.prev, prev));
result = FALSE;
}
/*
* Does this element have a valid type?
*/
if ( eptr->lo_any.type < 0 || eptr->lo_any.type > LO_JAVA ) {
XP_TRACE(("element %ld at address 0x%08x has an unknown type %d.",
index, eptr, eptr->lo_any.type));
result = FALSE;
}
/*
* Does this element have a valid element id?
*/
if ( eptr->lo_any.ele_id <= elementID ) {
XP_TRACE(("element %ld at address 0x%08x has an invalid ele_id %ld.",
index, eptr, eptr->lo_any.ele_id));
/* Exit because the pointers may be invalid. */
return FALSE;
}
elementID = eptr->lo_any.ele_id;
/*
* Verify the edit element if it exists.
*/
if ( eptr->lo_any.edit_element != NULL )
{
/*EDT_VerifyLayoutElement( pContext, eptr, print );*/
}
/*
* Update our loop variables
*/
prev = eptr;
index++;
}
/*
* Check that the last "next" pointer points to the end of the document.
*/
if ( prev != end ) {
XP_TRACE(("end 0x%08x is not the same as the last linked-list element 0x%08x",
end, prev));
result = FALSE;
}
return result;
}
Bool
lo_VerifyLayoutImplementation( MWContext *pContext, Bool print) {
/* Debugging aid. Checks consistency of the layout for this context.
* returns TRUE if the layout is valid.
* Prints information to stderr if the layout is invalid.
*/
Bool result;
int32 doc_id;
lo_TopState *top_state;
lo_DocState *state;
LO_Element **array;
LO_Element *eptr;
LO_Element *start;
LO_Element *end;
#ifdef XP_WIN16
XP_Block *larray_array;
#endif /* XP_WIN16 */
result = TRUE;
if ( ! pContext ) {
XP_TRACE(("context is NULL."));
return FALSE;
}
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
doc_id = XP_DOCID(pContext);
top_state = lo_FetchTopState(doc_id);
if (top_state == NULL)
{
XP_TRACE(("top_state is NULL."));
return FALSE;
}
state = top_state->doc_state;
if (state == NULL)
{
XP_TRACE(("state is NULL."));
return FALSE;
}
/*
* Get first element in doc.
*/
#ifdef XP_WIN16
XP_LOCK_BLOCK(larray_array, XP_Block *, state->larray_array);
state->line_array = larray_array[0];
XP_UNLOCK_BLOCK(state->larray_array);
#endif /* XP_WIN16 */
XP_LOCK_BLOCK(array, LO_Element **, state->line_array);
eptr = array[0];
XP_UNLOCK_BLOCK(state->line_array);
if (eptr == NULL)
{
XP_TRACE(("No first element."));
return FALSE;
}
start = eptr;
/*
* Get last element in doc.
*/
end = state->end_last_line;
if (end == NULL)
{
XP_TRACE(("No last element."));
return FALSE;
}
return lo_VerifyList(pContext, top_state, state, start, end, state->float_list, print);
}
Bool
lo_VerifyLayout( MWContext *pContext) {
return lo_VerifyLayoutImplementation(pContext, FALSE);
}
void
lo_PrintLayout( MWContext *pContext) {
lo_VerifyLayoutImplementation(pContext, TRUE);
}
#endif /* DEBUG */
#endif /* editor */
void LO_SetBaseURL( MWContext *context, char *pURL ){
int32 doc_id;
lo_TopState *top_state;
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
doc_id = XP_DOCID(context);
top_state = lo_FetchTopState(doc_id);
if ((top_state == NULL)||(top_state->doc_state == NULL))
{
return;
}
XP_FREE( top_state->base_url );
top_state->base_url = XP_STRDUP( pURL );
}
char* LO_GetBaseURL( MWContext *context ){
int32 doc_id;
lo_TopState *top_state;
/*
* Get the unique document ID, and retreive this
* documents layout state.
*/
doc_id = XP_DOCID(context);
top_state = lo_FetchTopState(doc_id);
if ((top_state == NULL)||(top_state->doc_state == NULL))
{
return 0;
}
return top_state->base_url;
}