dispatch()

in src/scripting_api/event.js [83:239]

• 137 lines of code
• 28 McCabe index (conditional complexity)

  dispatch(baseEvent) {
    if (
      typeof PDFJSDev !== "undefined" &&
      PDFJSDev.test("TESTING") &&
      baseEvent.name === "sandboxtripbegin"
    ) {
      this._externalCall("send", [{ command: "sandboxTripEnd" }]);
      return;
    }

    const id = baseEvent.id;
    if (!(id in this._objects)) {
      let event;
      if (id === "doc" || id === "page") {
        event = globalThis.event = new Event(baseEvent);
        event.source = event.target = this._document.wrapped;
        event.name = baseEvent.name;
      }
      if (id === "doc") {
        const eventName = event.name;
        if (eventName === "Open") {
          // The user has decided to open this pdf, hence we enable
          // userActivation.
          this.userActivation();
          // Initialize named actions before calling formatAll to avoid any
          // errors in the case where a formatter is using one of those named
          // actions (see #15818).
          this._document.obj._initActions();
          // Before running the Open event, we run the format callbacks but
          // without changing the value of the fields.
          // Acrobat does the same thing.
          this.formatAll();
        }
        if (
          !["DidPrint", "DidSave", "WillPrint", "WillSave"].includes(eventName)
        ) {
          this.userActivation();
        }
        this._document.obj._dispatchDocEvent(event.name);
      } else if (id === "page") {
        this.userActivation();
        this._document.obj._dispatchPageEvent(
          event.name,
          baseEvent.actions,
          baseEvent.pageNumber
        );
      } else if (id === "app" && baseEvent.name === "ResetForm") {
        this.userActivation();
        for (const fieldId of baseEvent.ids) {
          const obj = this._objects[fieldId];
          obj?.obj._reset();
        }
      }
      return;
    }

    const name = baseEvent.name;
    const source = this._objects[id];
    const event = (globalThis.event = new Event(baseEvent));
    let savedChange;

    this.userActivation();

    if (source.obj._isButton()) {
      source.obj._id = id;
      event.value = source.obj._getExportValue(event.value);
      if (name === "Action") {
        source.obj._value = event.value;
      }
    }

    switch (name) {
      case "Keystroke":
        savedChange = {
          value: event.value,
          changeEx: event.changeEx,
          change: event.change,
          selStart: event.selStart,
          selEnd: event.selEnd,
        };
        break;
      case "Blur":
      case "Focus":
        Object.defineProperty(event, "value", {
          configurable: false,
          writable: false,
          enumerable: true,
          value: event.value,
        });
        break;
      case "Validate":
        this.runValidation(source, event);
        return;
      case "Action":
        this.runActions(source, source, event, name);
        this.runCalculate(source, event);
        return;
    }

    this.runActions(source, source, event, name);

    if (name !== "Keystroke") {
      return;
    }

    if (event.rc) {
      if (event.willCommit) {
        this.runValidation(source, event);
      } else {
        if (source.obj._isChoice) {
          source.obj.value = savedChange.changeEx;
          source.obj._send({
            id: source.obj._id,
            siblings: source.obj._siblings,
            value: source.obj.value,
          });
          return;
        }

        const value = (source.obj.value = this.mergeChange(event));
        let selStart, selEnd;
        if (
          event.selStart !== savedChange.selStart ||
          event.selEnd !== savedChange.selEnd
        ) {
          // Selection has been changed by the script so apply the changes.
          selStart = event.selStart;
          selEnd = event.selEnd;
        } else {
          selEnd = selStart = savedChange.selStart + event.change.length;
        }
        source.obj._send({
          id: source.obj._id,
          siblings: source.obj._siblings,
          value,
          selRange: [selStart, selEnd],
        });
      }
    } else if (!event.willCommit) {
      source.obj._send({
        id: source.obj._id,
        siblings: source.obj._siblings,
        value: savedChange.value,
        selRange: [savedChange.selStart, savedChange.selEnd],
      });
    } else {
      // Entry is not valid (rc == false) and it's a commit
      // so just clear the field.
      source.obj._send({
        id: source.obj._id,
        siblings: source.obj._siblings,
        value: "",
        formattedValue: null,
        selRange: [0, 0],
      });
    }
  }