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Implemented accNavigate().

This commit is contained in:
Pietro Gagliardi 2015-02-16 15:34:48 -05:00
parent 9338743e5d
commit 8e4145b00c
1 changed files with 127 additions and 3 deletions
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130
wintable/accessibility.h
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@ -4,6 +4,8 @@
// - TODO figure out what to do about header // - TODO figure out what to do about header
// - a row extends as far right as the right edge of the last cell in the row; anything to the right of that is treated as table space (just like with mouse selection) // - a row extends as far right as the right edge of the last cell in the row; anything to the right of that is treated as table space (just like with mouse selection)
// - this has the added effect that hit-testing can only ever return either the table or a cell, never a row // - this has the added effect that hit-testing can only ever return either the table or a cell, never a row
// - cells have no children; checkbox cells are themselves the accessible object
// - TODO if we ever add combobox columns, this will need to change somehow
// TODOs: // TODOs:
// - make sure E_POINTER and RPC_E_DISCONNECTED are correct returns for IAccessible // - make sure E_POINTER and RPC_E_DISCONNECTED are correct returns for IAccessible
@ -384,11 +386,133 @@ static HRESULT STDMETHODCALLTYPE tableAccaccLocation(IAccessible *this, long *px
static HRESULT STDMETHODCALLTYPE tableAccaccNavigate(IAccessible *this, long navDir, VARIANT varStart, VARIANT *pvarEndUpAt) static HRESULT STDMETHODCALLTYPE tableAccaccNavigate(IAccessible *this, long navDir, VARIANT varStart, VARIANT *pvarEndUpAt)
{ {
if (TA->t == NULL || TA->std == NULL) { HRESULT hr;
// TODO set values on error tableAccWhat what;
intptr_t row = -1;
intptr_t column = -1;
if (pvarEndUpAt == NULL)
return E_POINTER;
// TODO set pvarEndUpAt to an invalid value?
if (TA->t == NULL || TA->std == NULL)
return RPC_E_DISCONNECTED; return RPC_E_DISCONNECTED;
what = TA->what;
hr = normalizeWhat(TA, varStart, &what);
if (hr != S_OK)
return hr;
switch (what.role) {
case ROLE_SYSTEM_TABLE:
switch (navDir) {
case NAVDIR_FIRSTCHILD:
// TODO header row
if (TA->t->count == 0)
goto nowhere;
row = 0;
goto specificRow;
case NAVDIR_LASTCHILD:
// TODO header row
if (TA->t->count == 0)
goto nowhere;
row = TA->t->count - 1;
goto specificRow;
}
// otherwise, defer to the standard accessible object
return IAccessible_accNavigate(TA->std, navDir, varStart, pvarEndUpAt);
case ROLE_SYSTEM_ROW:
row = what.row;
switch (navDir) {
case NAVDIR_UP:
case NAVDIR_PREVIOUS:
if (row == 0) // can't go up
goto nowhere;
row--;
// row should still be valid because normalizeWhat() returns an error if the current row is no longer valid, and if that's valid, the row above it should also be valid
goto specificRow;
case NAVDIR_DOWN:
case NAVDIR_NEXT:
if (row == TA->t->count - 1) // can't go down
goto nowhere;
row++;
// row should still be valid by the above conjecture
goto specificRow;
case NAVDIR_LEFT:
case NAVDIR_RIGHT:
goto nowhere;
// TODO this doesn't actually exist yet https://msdn.microsoft.com/en-us/library/ms971325 talks about it
// case NAVDIR_PARENT:
// goto tableItself;
case NAVDIR_FIRSTCHILD:
if (TA->t->nColumns == 0)
goto nowhere;
column = 0;
goto specificCell;
case NAVDIR_LASTCHILD:
if (TA->t->nColumns == 0)
goto nowhere;
column = TA->t->nColumns - 1;
goto specificCell;
}
// TODO differentiate between unsupported navigation directions and invalid navigation directions
goto nowhere;
case ROLE_SYSTEM_CELL:
row = what.row;
column = what.column;
switch (navDir) {
case NAVDIR_UP:
if (row == 0) // can't go up
goto nowhere;
row--;
goto specificCell;
case NAVDIR_DOWN:
if (row == TA->t->count - 1) // can't go down
goto nowhere;
row++;
goto specificCell;
case NAVDIR_LEFT:
case NAVDIR_PREVIOUS:
if (column == 0) // can't go left
goto nowhere;
column--;
goto specificCell;
case NAVDIR_RIGHT:
case NAVDIR_NEXT:
if (column == TA->t->nColumns - 1) // can't go right
goto nowhere;
column++;
goto specificCell;
// TODO this doesn't actually exist yet https://msdn.microsoft.com/en-us/library/ms971325 talks about it
// case NAVDIR_PARENT:
// goto specificRow;
case NAVDIR_FIRSTCHILD:
case NAVDIR_LASTCHILD:
goto nowhere;
}
// TODO differentiate between unsupported navigation directions and invalid navigation directions
goto nowhere;
} }
return IAccessible_accNavigate(TA->std, navDir, varStart, pvarEndUpAt); // TODO actually do this right
// TODO un-GetLastError() this
panic("impossible blah blah blah TODO write this");
return E_FAIL;
nowhere:
pvarEndUpAt->vt = VT_EMPTY;
return S_FALSE;
tableItself:
pvarEndUpAt->vt = VT_DISPATCH;
pvarEndUpAt->pdispVal = (IDispatch *) newTableAcc(TA->t, ROLE_SYSTEM_TABLE, -1, -1);
return S_OK;
specificRow:
pvarEndUpAt->vt = VT_DISPATCH;
pvarEndUpAt->pdispVal = (IDispatch *) newTableAcc(TA->t, ROLE_SYSTEM_ROW, row, -1);
return S_OK;
specificCell:
pvarEndUpAt->vt = VT_DISPATCH;
pvarEndUpAt->pdispVal = (IDispatch *) newTableAcc(TA->t, ROLE_SYSTEM_CELL, row, column);
return S_OK;
} }
// TODO should this ever return parents? // TODO should this ever return parents?