Examples with OrionPixelPositionOverlay org.eclipse.che.ide.editor.orion.client.jso.OrionPixelPositionOverlay used on opensource projects

Example 1 with OrionPixelPositionOverlay

use of org.eclipse.che.ide.editor.orion.client.jso.OrionPixelPositionOverlay in project che by eclipse.

the class ContentAssistWidget method show.

/**
     * Displays assist popup relative to the current cursor position.
     *
     * @param proposals
     *         proposals to display
     */
public void show(final List<CompletionProposal> proposals) {
    this.proposals = proposals;
    OrionTextViewOverlay textView = textEditor.getTextView();
    OrionPixelPositionOverlay caretLocation = textView.getLocationAtOffset(textView.getCaretOffset());
    caretLocation.setY(caretLocation.getY() + textView.getLineHeight());
    caretLocation = textView.convert(caretLocation, "document", "page");
    /** The fastest way to remove element children. Clear and add items. */
    listElement.setInnerHTML("");
    /* Display an empty popup when it is nothing to show. */
    if (getTotalItems() == 0) {
        final Element emptyElement = Elements.createLiElement(popupResources.popupStyle().item());
        emptyElement.setTextContent("No proposals");
        listElement.appendChild(emptyElement);
        return;
    }
    /* Automatically apply the completion proposal if it only one. */
    if (getTotalItems() == 1) {
        applyProposal(proposals.get(0));
        return;
    }
    /* Reset popup dimensions and show. */
    popupElement.getStyle().setLeft(caretLocation.getX(), PX);
    popupElement.getStyle().setTop(caretLocation.getY(), PX);
    popupElement.getStyle().setWidth("400px");
    popupElement.getStyle().setHeight("200px");
    popupElement.getStyle().setOpacity(1);
    Elements.getDocument().getBody().appendChild(this.popupElement);
    /* Add the top extra row. */
    setExtraRowHeight(appendExtraRow(), 0);
    /* Add the popup items. */
    for (int i = 0; i < Math.min(DOM_ITEMS_SIZE, getTotalItems()); i++) {
        listElement.appendChild(createProposalPopupItem(i));
    }
    /* Add the bottom extra row. */
    setExtraRowHeight(appendExtraRow(), Math.max(0, getTotalItems() - DOM_ITEMS_SIZE));
    /* Correct popup position (wants to be refactored) */
    final Window window = Elements.getWindow();
    final int viewportWidth = window.getInnerWidth();
    final int viewportHeight = window.getInnerHeight();
    int spaceBelow = viewportHeight - caretLocation.getY();
    if (this.popupElement.getOffsetHeight() > spaceBelow) {
        // Check if div is too large to fit above
        int spaceAbove = caretLocation.getY() - textView.getLineHeight();
        if (this.popupElement.getOffsetHeight() > spaceAbove) {
            // Squeeze the div into the larger area
            if (spaceBelow > spaceAbove) {
                this.popupElement.getStyle().setProperty("maxHeight", spaceBelow + "px");
            } else {
                this.popupElement.getStyle().setProperty("maxHeight", spaceAbove + "px");
                this.popupElement.getStyle().setTop("0");
            }
        } else {
            // Put the div above the line
            this.popupElement.getStyle().setTop((caretLocation.getY() - this.popupElement.getOffsetHeight() - textView.getLineHeight()) + "px");
            this.popupElement.getStyle().setProperty("maxHeight", spaceAbove + "px");
        }
    } else {
        this.popupElement.getStyle().setProperty("maxHeight", spaceBelow + "px");
    }
    if (caretLocation.getX() + this.popupElement.getOffsetWidth() > viewportWidth) {
        int leftSide = viewportWidth - this.popupElement.getOffsetWidth();
        if (leftSide < 0) {
            leftSide = 0;
        }
        this.popupElement.getStyle().setLeft(leftSide + "px");
        this.popupElement.getStyle().setProperty("maxWidth", (viewportWidth - leftSide) + "px");
    } else {
        this.popupElement.getStyle().setProperty("maxWidth", viewportWidth + caretLocation.getX() + "px");
    }
    /* Don't attach handlers twice. Visible popup must already have their attached. */
    if (!visible) {
        addPopupEventListeners();
    }
    /* Indicates the codeassist is visible. */
    visible = true;
    focused = false;
    /* Update documentation popup position */
    docPopup.getElement().getStyle().setLeft(popupElement.getOffsetLeft() + popupElement.getOffsetWidth() + 3, Style.Unit.PX);
    docPopup.getElement().getStyle().setTop(popupElement.getOffsetTop(), Style.Unit.PX);
    /* Select first row. */
    selectFirst();
}