Debugger.Breakpoint object

breakpoint.js

Debugger.Breakpoint = function Breakpoint(dbg, url, line, handler) {
    this._dbg = dbg;
    this.url = url;
    this.line = line;
    this.onHit = handler;
    this._scripts = null;
    this.enabled = true;
};
Debugger.Breakpoint.prototype.hit = function hit(frame) {
    return this.onHit(frame);
};
Object.defineProperty(Debugger.Breakpoint.prototype, "enabled", {
    configurable: true,
    get: function enabled() {
        return this._scripts !== null;
    },
    set: function enabled(state) {
        if (state) {
            if (this._scripts === null) {
                this._scripts = this._dbg.findScripts({url: this.url, line: this.line});
                for (let script of this._scripts) {
                    for (let offset of script.getLineOffsets(this.line))
                        script.setBreakpoint(offset, this);
                }
            }
        } else {
            if (this._scripts !== null) {
                for (let script of this._scripts)
                    script.clearBreakpoint(this);
                this._scripts = null;
            }
        }
    }
});

Debugger.prototype.breakAt = function breakAt(url, line, handler) {
    return new Debugger.Breakpoint(this, url, line, handler);
};

test-setup.js

var g = newGlobal('new-compartment');
g.evaluate('function f(x)\n { \n return x * 2;\n }\n', {fileName: 'amazing.js', lineNumber: 1});
var dbg = Debugger(g);
var bp = dbg.breakAt('amazing.js', 3, function (frame) {
    print("DEBUG: " + frame.eval('x').return);
});

/*
  js> g.f(33)
  DEBUG: 33
  66
  js> bp.enabled
  true
  js> bp.enabled = false  // disable the breakpoint
  false
  js> bp.enabled
  false
  js> g.f(22)
  44
*/