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Diffstat (limited to 'offapi/com/sun/star/rendering/XTextLayout.idl')
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diff --git a/offapi/com/sun/star/rendering/XTextLayout.idl b/offapi/com/sun/star/rendering/XTextLayout.idl new file mode 100644 index 000000000..dc71f857e --- /dev/null +++ b/offapi/com/sun/star/rendering/XTextLayout.idl @@ -0,0 +1,396 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ +#ifndef __com_sun_star_rendering_XTextLayout_idl__ +#define __com_sun_star_rendering_XTextLayout_idl__ + +#include <com/sun/star/uno/XInterface.idl> +#include <com/sun/star/lang/IllegalArgumentException.idl> +#include <com/sun/star/lang/IndexOutOfBoundsException.idl> +#include <com/sun/star/geometry/RealPoint2D.idl> +#include <com/sun/star/geometry/RealBezierSegment2D.idl> +#include <com/sun/star/geometry/RealRectangle2D.idl> +#include <com/sun/star/rendering/ViewState.idl> +#include <com/sun/star/rendering/RenderState.idl> +#include <com/sun/star/rendering/StringContext.idl> +#include <com/sun/star/rendering/TextHit.idl> +#include <com/sun/star/rendering/Caret.idl> + + +module com { module sun { module star { module rendering { + +interface XCanvas; +interface XCanvasFont; +interface XPolyPolygon2D; + +/** This is the central interface for text layouting.<p> + + This is the central interface for text-related tasks more + complicated than simple string rendering. Note that all query + methods are subject to the current layout state of this + object. That is, calls to XTextLayout::justify() + or XTextLayout::applyLogicalAdvancements() are + likely to change subsequent output of those query methods.<p> + + Similar to XCanvasFont, all measurements and + coordinates accepted and returned by this interface are relative + to the font's local coordinate system (which only equals device + coordinate space, if the combined render transformation used + during text output is the identity transformation). Conversely, if + the combined transformation used during text output is + <em>not</em> the identity transformation, all measurements + returned by this interface should be subjected to that + transformation, to yield values in device coordinate space. + Depending on the underlying font technology, actual device output + might be off by up to one device pixel from the transformed + metrics.<p> + + @since OOo 2.0 + */ +interface XTextLayout : ::com::sun::star::uno::XInterface +{ + /** Extract the polygonal shapes of the layouted text.<p> + + Each glyph is represented by a separate + XPolyPolygon2D in the returned sequence.<p> + + @returns a sequence of XPolyPolygon2D in font + coordinate space, one for every glyph. + */ + sequence<XPolyPolygon2D> queryTextShapes(); + + + /** Query the ink bounding boxes for every glyph in the layouted + text.<p> + + Ink, or tight bounding boxes in this case means that for + e.g. an "a", the bounding box for the + XPolyPolygon2D describing the glyph "a" is + returned, not the logical dimensions of the character in the + font.<p> + + @returns a sequence of rectangles in font coordinate space, + specifying the bounds, one for every glyph. + + @see XTextLayout::queryMeasures() + */ + sequence<::com::sun::star::geometry::RealRectangle2D > queryInkMeasures(); + + + /** Query the logical bounding boxes of every character in the + given text string.<p> + + Logical bounding boxes means the space that the font allocates + for the given character, which, e.g. for a ".", might be + significantly broader than the bounds returned via + XTextLayout::queryInkMeasures(). + + @returns a sequence of rectangles specifying the bounds in + font coordinate space, one for every glyph. + + @see XTextLayout::queryInkMeasures() + */ + sequence<::com::sun::star::geometry::RealRectangle2D> queryMeasures(); + + + /** Query the advancements for every character in the input string.<p> + + This method returns a sequence of advancements, one for each + character in the input string (<em>not</em> for every + glyph. There might be multiple glyphs per input character, or + multiple input characters per glyph). + + An advancement value is the distance of the glyph to the beginning + edge, which is left for LTR text and is right for RTL text. The + maximum of the advancements can be deemed as the width of the whole + text layout. + + This method can be used to query for the layout's default + advancements, which can subsequently be changed and applied to + the layout via + XTextLayout::applyLogicalAdvancements().<p> + + @returns a sequence of double specifying the + advancements per character in font coordinate space. + + @see XTextLayout::applyLogicalAdvancements() + */ + sequence<double> queryLogicalAdvancements(); + + + /** Apply explicit advancements for every character in the layout + string.<p> + + This method applies the specified advancements to every + logical character in the input string (<em>not</em> for every + glyph. There might be multiple glyphs per input character, or + multiple input characters per glyph). This is useful to + explicitly manipulate the exact output positions of + characters, e.g. relative to a reference output device.<p> + + @param aAdvancements + A sequence of character advancements, in font coordinate + space. + + @see XTextLayout::queryLogicalAdvancements() + + @throws com::sun::star::lang::IllegalArgumentException + if the size of aAdvancements does not match the number of + characters in the text. + */ + void applyLogicalAdvancements( [in] sequence< double > aAdvancements ) + raises (com::sun::star::lang::IllegalArgumentException); + + + /** Query the overall bounding box of the text.<p> + + This method is similar to + XTextLayout::queryTextMeasures(), only that the + overall bounds are returned by this method.<p> + + @return the overall bounding box for the given layout, in font + coordinate space. + */ + ::com::sun::star::geometry::RealRectangle2D queryTextBounds(); + + + /** Justify the text to the given size.<p> + + This method is the core of the XTextLayout + interface, because it layouts the text in a typographically + correct way into the available space.<p> + + @param nSize + The requested size of the text after justification (either + width or height, depending on the writing mode). This + parameter is interpreted in font coordinate space. + + @return the actual size of the text after the justification in + the font coordinate space. Depending on the font and the + script type, this might be somewhat different from the size + requested. If the requested size was smaller than the + justification algorithm could compress the text, this value + might even be significantly larger than nSize. + + @throws com::sun::star::lang::IllegalArgumentException + if nSize is 0 or negative. + */ + double justify( [in] double nSize ) + raises (com::sun::star::lang::IllegalArgumentException); + + + /** Justify a number of text layouts to the given size.<p> + + This method can be used to combine the layout of a text line + into a single justification run. This is e.g. useful if the + line consists of several text portions (e.g. because of + different fonts or colors), but it is desirable to spread the + available space more globally across the different layout + objects. If, for example, one layout object contains + significantly more whitespace or Kashidas than the rest, this + method can assign proportionally more space to this layout + object.<p> + + @param aNextLayouts + A sequence of layouts following this one in logical text + order. + + @param nSize + The requested size of the text for <em>all</em> + XTextLayouts after justification in font + coordinate space (either width or height, depending on the + writing mode). + + @return the actual size of the text after the justification, + in font coordinate space. Depending on the font and the + script type, this might be somewhat different from the size + requested. If the requested size was smaller than the + justification algorithm could compress the text, this value + might even be significantly larger than nSize. + + @throws com::sun::star::lang::IllegalArgumentException + if one of the parameters are not in the valid range. + */ + double combinedJustify( [in] sequence< XTextLayout > aNextLayouts, [in] double nSize ) + raises (com::sun::star::lang::IllegalArgumentException); + + + /** This method determines the hit position in the text.<p> + + This method determines the index of the character hit at the + specified position (in font coordinate space).<p> + + @param aHitPoint + The position in font coordinate space to determine the + underlying character index for. + + */ + TextHit getTextHit( [in] ::com::sun::star::geometry::RealPoint2D aHitPoint ); + + + /** This method converts an insertion index to a caret.<p> + + This method generates caret information for a given insertion + point in the layout text.<p> + + @param nInsertionIndex + The insertion index, as e.g. returned by + XTextLayout::getTextHit(). This value must be + in the range 0 up to the number of characters in the string. + + @param bExcludeLigatures + Set this to `TRUE` to skip the positions inside ligatures as + valid caret placements. For example, this would avoid setting + the caret between the "f" and the "i" in a "fi" ligature. + + @returns the generated Caret structure. + + @throws com::sun::star::lang::IndexOutOfBoundsException + if nInsertionIndex is outside the permissible range. + */ + Caret getCaret( [in] long nInsertionIndex, + [in] boolean bExcludeLigatures ) + raises (com::sun::star::lang::IndexOutOfBoundsException); + + + /** This method calculates a new insertion index.<p> + + This method calculates a new insertion index, given a start + index and the number of characters to skip. This is most + useful for caret traveling.<p> + + @param nStartIndex + The insertion index to start from. + + @param nCaretAdvancement + For values greater than 0, the caret is visually moved to the + right. For values smaller than 0, the caret is visually moved + to the left. + + @param bExcludeLigatures + Set this to `TRUE` to skip the positions inside ligatures as + valid caret placements. For example, this would avoid setting + the caret between the "f" and the "i" in a "fi" ligature. + + @returns the new insertion index. + + @throws com::sun::star::lang::IndexOutOfBoundsException + if nStartIndex or nCaretAdvancement is outside the permissible + range. + */ + long getNextInsertionIndex( [in] long nStartIndex, + [in] long nCaretAdvancement, + [in] boolean bExcludeLigatures ) + raises (com::sun::star::lang::IndexOutOfBoundsException); + + + /** This method generates a highlight polygon.<p> + + This method generates a highlighting polygon from two + insertion indices. This polygon will be visually continuous, + i.e. will not have non-highlighted text in between.<p> + + @param nStartIndex + Start of the selection range. + + @param nEndIndex + End of the selection range. + + @return the highlight polygon in the font coordinate space. + + @throws com::sun::star::lang::IndexOutOfBoundsException + if nStartIndex or nEndIndex are outside the permissible + range. + */ + XPolyPolygon2D queryVisualHighlighting( [in] long nStartIndex, + [in] long nEndIndex ) + raises (com::sun::star::lang::IndexOutOfBoundsException); + + + /** This method generates a highlight polygon.<p> + + This method generates a highlighting polygon from two + insertion indices. This polygon will not always be visually + continuous, if e.g. the text direction changes in the middle + of the selection, the might be parts visually between start + and end position that are not selected.<p> + + @param nStartIndex + Start of the selection range. + + @param nEndIndex + End of the selection range. + + @return the highlight polygon in the font coordinate space. + + @throws com::sun::star::lang::IndexOutOfBoundsException + if nStartIndex or nEndIndex are outside the permissible + range. + */ + XPolyPolygon2D queryLogicalHighlighting( [in] long nStartIndex, + [in] long nEndIndex ) + raises (com::sun::star::lang::IndexOutOfBoundsException); + + + /** This method yields the baseline offset.<p> + + This method returns the baseline offset for this layout + object, either measured from the top or the left edge, + depending on the writing direction (horizontally or + vertically). Since rendering this layout via + XCanvas::drawTextLayout() outputs relative to + the layout object's baseline, this method can be used to + e.g. output relative to the left, top edge.<p> + + @returns the distance of the main baseline from the top or the + left edge of this object, depending on the writing direction. + */ + double getBaselineOffset(); + + + /** This method returns the main writing direction.<p> + + This method returns the main writing direction of this layout, + i.e. either LEFT_TO_RIGHT or RIGHT_TO_LEFT.<p> + + @returns the main text direction of this layout. + */ + byte getMainTextDirection(); + + + /** Request the associated font for this layout. + + @returns the associated font for this layout. + */ + XCanvasFont getFont(); + + + /** Request the text this layout contains. + + @returns the text this layout contains. + */ + StringContext getText(); + + +}; + +}; }; }; }; + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |