snap-preferences.cpp revision fd3a244193c841a6594268b784dd537ea46f6916
/*
* Storing of snapping preferences.
*
* Authors:
* Diederik van Lierop <mail@diedenrezi.nl>
*
* Copyright (C) 2008 - 2011 Authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "inkscape.h"
#include "snap-preferences.h"
#include <glib.h> // g_assert()
_snap_enabled_globally(true),
_snap_postponed_globally(false),
_strict_snapping(true),
_snap_perp(false),
_snap_tang(false)
{
// Check for powers of two; see the comments in snap-enums.h
g_assert((SNAPTARGET_BBOX_CATEGORY != 0) && !(SNAPTARGET_BBOX_CATEGORY & (SNAPTARGET_BBOX_CATEGORY - 1)));
g_assert((SNAPTARGET_NODE_CATEGORY != 0) && !(SNAPTARGET_NODE_CATEGORY & (SNAPTARGET_NODE_CATEGORY - 1)));
g_assert((SNAPTARGET_DATUMS_CATEGORY != 0) && !(SNAPTARGET_DATUMS_CATEGORY & (SNAPTARGET_DATUMS_CATEGORY - 1)));
g_assert((SNAPTARGET_OTHERS_CATEGORY != 0) && !(SNAPTARGET_OTHERS_CATEGORY & (SNAPTARGET_OTHERS_CATEGORY - 1)));
for (int n = 0; n < SNAPTARGET_MAX_ENUM_VALUE; n++) {
_active_snap_targets[n] = -1;
}
}
{
}
{
return isTargetSnappable(SNAPTARGET_NODE_CATEGORY, SNAPTARGET_BBOX_CATEGORY, SNAPTARGET_OTHERS_CATEGORY) || isTargetSnappable(SNAPTARGET_GUIDE, SNAPTARGET_GRID, SNAPTARGET_PAGE_BORDER);
}
void Inkscape::SnapPreferences::_mapTargetToArrayIndex(Inkscape::SnapTargetType &target, bool &always_on, bool &group_on) const
{
if (target == SNAPTARGET_BBOX_CATEGORY ||
// These main targets should be handled separately, because otherwise we might call isTargetSnappable()
// for them (to check whether the corresponding group is on) which would lead to an infinite recursive loop
group_on = true;
return;
}
if (target & SNAPTARGET_BBOX_CATEGORY) {
group_on = isTargetSnappable(SNAPTARGET_BBOX_CATEGORY); // Only if the group with bbox sources/targets has been enabled, then we might snap to any of the bbox targets
return;
}
if (target & SNAPTARGET_NODE_CATEGORY) {
group_on = isTargetSnappable(SNAPTARGET_NODE_CATEGORY); // Only if the group with path/node sources/targets has been enabled, then we might snap to any of the nodes/paths
switch (target) {
case SNAPTARGET_RECT_CORNER:
break;
break;
break;
break;
default:
break;
}
return;
}
if (target & SNAPTARGET_DATUMS_CATEGORY) {
group_on = true; // These snap targets cannot be disabled as part of a disabled group;
switch (target) {
// Some snap targets don't have their own toggle. These targets are called "secondary targets". We will re-map
// them to their cousin which does have a toggle, and which is called a "primary target"
break;
case SNAPTARGET_GUIDE_ORIGIN:
break;
case SNAPTARGET_PAGE_CORNER:
break;
// Some snap targets cannot be toggled at all, and are therefore always enabled
always_on = true; // Doesn't have it's own button
break;
// These are only listed for completeness
case SNAPTARGET_GRID:
case SNAPTARGET_GUIDE:
case SNAPTARGET_PAGE_BORDER:
break;
default:
break;
}
return;
}
if (target & SNAPTARGET_OTHERS_CATEGORY) {
// Only if the group with "other" snap sources/targets has been enabled, then we might snap to any of those targets
// ... but this doesn't hold for the page border, grids, and guides
switch (target) {
// Some snap targets don't have their own toggle. These targets are called "secondary targets". We will re-map
// them to their cousin which does have a toggle, and which is called a "primary target"
case SNAPTARGET_TEXT_ANCHOR:
break;
case SNAPTARGET_IMG_CORNER: // Doesn't have its own button, on if the group is on
break;
// Some snap targets cannot be toggled at all, and are therefore always enabled
case SNAPTARGET_CONSTRAINT:
always_on = true; // Doesn't have it's own button
break;
// These are only listed for completeness
case SNAPTARGET_TEXT_BASELINE:
break;
default:
break;
}
return;
}
if (target == SNAPTARGET_UNDEFINED ) {
} else {
}
}
void Inkscape::SnapPreferences::setTargetSnappable(Inkscape::SnapTargetType const target, bool enabled)
{
bool always_on = false;
bool group_on = false; // Only needed as a dummy
if (always_on) { // If true, then this snap target is always active and cannot be toggled
// Catch coding errors
g_warning("Snap-preferences warning: Trying to enable/disable a snap target (#%i) that's always on by definition", index);
} else {
} else { // If it has been re-mapped though, then this target does not have its own toggle button and should therefore not be set
g_warning("Snap-preferences warning: Trying to enable/disable a secondary snap target (#%i); only primary targets can be set", index);
}
}
}
{
bool always_on = false;
bool group_on = false;
if (group_on) { // If true, then this snap target is in a snap group that has been enabled (e.g. bbox group, nodes/paths group, or "others" group
if (always_on) { // If true, then this snap target is always active and cannot be toggled
return true;
} else {
// Catch coding errors
// This happens if setTargetSnappable() has not been called for this parameter, e.g. from within sp_namedview_set,
// or if this target index doesn't exist at all
}
return _active_snap_targets[index];
}
} else {
return false;
}
}
bool Inkscape::SnapPreferences::isTargetSnappable(Inkscape::SnapTargetType const target1, Inkscape::SnapTargetType const target2) const {
}
bool Inkscape::SnapPreferences::isTargetSnappable(Inkscape::SnapTargetType const target1, Inkscape::SnapTargetType const target2, Inkscape::SnapTargetType const target3) const {
}
bool Inkscape::SnapPreferences::isTargetSnappable(Inkscape::SnapTargetType const target1, Inkscape::SnapTargetType const target2, Inkscape::SnapTargetType const target3, Inkscape::SnapTargetType const target4) const {
return isTargetSnappable(target1) || isTargetSnappable(target2) || isTargetSnappable(target3) || isTargetSnappable(target4);
}
bool Inkscape::SnapPreferences::isTargetSnappable(Inkscape::SnapTargetType const target1, Inkscape::SnapTargetType const target2, Inkscape::SnapTargetType const target3, Inkscape::SnapTargetType const target4, Inkscape::SnapTargetType const target5) const {
return isTargetSnappable(target1) || isTargetSnappable(target2) || isTargetSnappable(target3) || isTargetSnappable(target4) || isTargetSnappable(target5);
}
{
bool always_on = false; // Only needed as a dummy
bool group_on = false; // Only needed as a dummy
// Catch coding errors
// This happens if setTargetSnappable() has not been called for this parameter, e.g. from within sp_namedview_set,
// or if this target index doesn't exist at all
} else {
if (index == target) { // I.e. if it has not been re-mapped, then we have a primary target at hand, which does have its own toggle button
return _active_snap_targets[index];
} else { // If it has been re-mapped though, then this target does not have its own toggle button and therefore the button status cannot be read
g_warning("Snap-preferences warning: Trying to determine the button status of a secondary snap target (#%i); However, only primary targets have a button", index);
}
}
return false;
}
Inkscape::SnapTargetType Inkscape::SnapPreferences::source2target(Inkscape::SnapSourceType source) const
{
switch (source)
{
case SNAPSOURCE_UNDEFINED:
return SNAPTARGET_UNDEFINED;
case SNAPSOURCE_BBOX_CATEGORY:
return SNAPTARGET_BBOX_CATEGORY;
case SNAPSOURCE_BBOX_CORNER:
return SNAPTARGET_BBOX_CORNER;
case SNAPSOURCE_BBOX_MIDPOINT:
return SNAPTARGET_BBOX_MIDPOINT;
return SNAPTARGET_BBOX_EDGE_MIDPOINT;
case SNAPSOURCE_NODE_CATEGORY:
return SNAPTARGET_NODE_CATEGORY;
case SNAPSOURCE_NODE_SMOOTH:
return SNAPTARGET_NODE_SMOOTH;
case SNAPSOURCE_NODE_CUSP:
return SNAPTARGET_NODE_CUSP;
case SNAPSOURCE_LINE_MIDPOINT:
return SNAPTARGET_LINE_MIDPOINT;
return SNAPTARGET_PATH_INTERSECTION;
case SNAPSOURCE_RECT_CORNER:
return SNAPTARGET_RECT_CORNER;
return SNAPTARGET_DATUMS_CATEGORY;
case SNAPSOURCE_GUIDE:
return SNAPTARGET_GUIDE;
case SNAPSOURCE_GUIDE_ORIGIN:
return SNAPTARGET_GUIDE_ORIGIN;
return SNAPTARGET_OTHERS_CATEGORY;
return SNAPTARGET_ROTATION_CENTER;
return SNAPTARGET_OBJECT_MIDPOINT;
case SNAPSOURCE_IMG_CORNER:
return SNAPTARGET_IMG_CORNER;
case SNAPSOURCE_TEXT_ANCHOR:
return SNAPTARGET_TEXT_ANCHOR;
case SNAPSOURCE_NODE_HANDLE:
case SNAPSOURCE_OTHER_HANDLE:
// For these snapsources there doesn't exist an equivalent snap target
return SNAPTARGET_NODE_CATEGORY;
case SNAPSOURCE_GRID_PITCH:
return SNAPTARGET_GRID;
default:
g_warning("Mapping of snap source to snap target undefined");
return SNAPTARGET_UNDEFINED;
}
}
{
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :