/**
* Notifies all views of a context change.
*
* @param nodes new context set (may be {@code null} if root nodes are addressed)
* @param quick quick switch
* @param vw the calling view
*/
public void context(final Nodes nodes, final boolean quick, final View vw) {
final Context ctx = gui.context;
// add new entry if current node set has not been cached yet
final Nodes newn = nodes.checkRoot();
final Nodes empty = new Nodes(new int[0], ctx.data(), ctx.marked.ftpos);
final Nodes curr = quick ? ctx.current() : null;
final Nodes cmp = quick ? curr : ctx.marked;
if (cont[hist] == null ? cmp != null : cmp == null || !cont[hist].sameAs(cmp)) {
checkHist();
if (quick) {
// store history entry
queries[hist] = "";
marked[hist] = new Nodes(ctx.data());
// add current entry
cont[++hist] = curr;
} else {
// store history entry
final String in = gui.input.getText();
queries[hist] = in;
marked[hist] = ctx.marked;
// add current entry
cont[++hist] = newn;
queries[hist] = in;
marked[hist] = empty;
}
histsize = hist;
}
ctx.set(newn, empty);
for (final View v : view) if (v != vw && v.visible()) v.refreshContext(true, quick);
gui.refreshControls();
}
/**
* Notifies all views of a selection change.
*
* @param mark marked nodes
* @param vw the calling view
*/
public void mark(final Nodes mark, final View vw) {
final Context ctx = gui.context;
ctx.marked = mark;
for (final View v : view) if (v != vw && v.visible()) v.refreshMark();
gui.filter.setEnabled(mark.size() != 0);
gui.refreshControls();
}
/**
* Notifies all views of a selection change. The mode flag determines what happens:
*
* <ul>
* <li>0: set currently focused node as marked node
* <li>1: add currently focused node
* <li>2: toggle currently focused node
* </ul>
*
* @param mode mark mode
* @param vw the calling view
*/
public void mark(final int mode, final View vw) {
final int f = gui.context.focused;
if (f == -1) return;
final Context ctx = gui.context;
Nodes nodes = ctx.marked;
if (mode == 0) {
nodes = new Nodes(f, ctx.data());
} else if (mode == 1) {
nodes.union(new int[] {f});
} else {
nodes.toggle(f);
}
mark(nodes, vw);
}
/**
* Moves around in the internal history and notifies all views of a context change.
*
* @param forward move forward or backward
*/
public void hist(final boolean forward) {
final Context ctx = gui.context;
final String query;
if (forward) {
if (hist == histsize) return;
query = queries[++hist];
} else {
if (hist == 0) return;
marked[hist] = ctx.marked;
query = queries[--hist];
}
ctx.set(cont[hist], marked[hist]);
gui.input.setText(query);
for (final View v : view) if (v.visible()) v.refreshContext(forward, false);
gui.refreshControls();
}
/**
* Removes existing history entries and sets an initial entry.
*
* @param ctx database context
* @return {@link Data} reference, or {@code null}
*/
private Data initHistory(final Context ctx) {
for (int h = 0; h < histsize; h++) {
marked[h] = null;
cont[h] = null;
queries[h] = null;
}
hist = 0;
histsize = 0;
final Data data = ctx.data();
if (data != null) {
// new database opened
marked[0] = new Nodes(data);
queries[0] = "";
}
return data;
}