llexpandabletextbox.cpp
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- /**
- * @file llexpandabletextbox.cpp
- * @brief LLExpandableTextBox and related class implementations
- *
- * $LicenseInfo:firstyear=2004&license=viewergpl$
- *
- * Copyright (c) 2004-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #include "llviewerprecompiledheaders.h"
- #include "llexpandabletextbox.h"
- #include "llscrollcontainer.h"
- #include "llwindow.h"
- static LLDefaultChildRegistry::Register<LLExpandableTextBox> t1("expandable_text");
- class LLExpanderSegment : public LLTextSegment
- {
- public:
- LLExpanderSegment(const LLStyleSP& style, S32 start, S32 end, const std::string& more_text, LLTextBase& editor )
- : LLTextSegment(start, end),
- mEditor(editor),
- mStyle(style),
- mExpanderLabel(more_text)
- {}
- /*virtual*/ bool getDimensions(S32 first_char, S32 num_chars, S32& width, S32& height) const
- {
- // more label always spans width of text box
- if (num_chars == 0)
- {
- width = 0;
- height = 0;
- }
- else
- {
- width = mEditor.getDocumentView()->getRect().getWidth() - mEditor.getHPad();
- height = llceil(mStyle->getFont()->getLineHeight());
- }
- return true;
- }
- /*virtual*/ S32 getOffset(S32 segment_local_x_coord, S32 start_offset, S32 num_chars, bool round) const
- {
- return start_offset;
- }
- /*virtual*/ S32 getNumChars(S32 num_pixels, S32 segment_offset, S32 line_offset, S32 max_chars) const
- {
- // require full line to ourselves
- if (line_offset == 0)
- {
- // print all our text
- return getEnd() - getStart();
- }
- else
- {
- // wait for next line
- return 0;
- }
- }
- /*virtual*/ F32 draw(S32 start, S32 end, S32 selection_start, S32 selection_end, const LLRect& draw_rect)
- {
- F32 right_x;
- mStyle->getFont()->renderUTF8(mExpanderLabel, start,
- draw_rect.mRight, draw_rect.mTop,
- mStyle->getColor(),
- LLFontGL::RIGHT, LLFontGL::TOP,
- 0,
- mStyle->getShadowType(),
- end - start, draw_rect.getWidth(),
- &right_x,
- mEditor.getUseEllipses());
- return right_x;
- }
- /*virtual*/ bool canEdit() const { return false; }
- // eat handleMouseDown event so we get the mouseup event
- /*virtual*/ BOOL handleMouseDown(S32 x, S32 y, MASK mask) { return TRUE; }
- /*virtual*/ BOOL handleMouseUp(S32 x, S32 y, MASK mask) { mEditor.onCommit(); return TRUE; }
- /*virtual*/ BOOL handleHover(S32 x, S32 y, MASK mask)
- {
- LLUI::getWindow()->setCursor(UI_CURSOR_HAND);
- return TRUE;
- }
- private:
- LLTextBase& mEditor;
- LLStyleSP mStyle;
- std::string mExpanderLabel;
- };
- LLExpandableTextBox::LLTextBoxEx::Params::Params()
- : more_label("more_label")
- {
- }
- LLExpandableTextBox::LLTextBoxEx::LLTextBoxEx(const Params& p)
- : LLTextEditor(p),
- mExpanderLabel(p.more_label),
- mExpanderVisible(false)
- {
- setIsChrome(TRUE);
- }
- void LLExpandableTextBox::LLTextBoxEx::reshape(S32 width, S32 height, BOOL called_from_parent)
- {
- hideExpandText();
- LLTextEditor::reshape(width, height, called_from_parent);
- if (getTextPixelHeight() > getRect().getHeight())
- {
- showExpandText();
- }
- }
- void LLExpandableTextBox::LLTextBoxEx::setText(const LLStringExplicit& text,const LLStyle::Params& input_params)
- {
- // LLTextBox::setText will obliterate the expander segment, so make sure
- // we generate it again by clearing mExpanderVisible
- mExpanderVisible = false;
- LLTextEditor::setText(text, input_params);
- // text contents have changed, segments are cleared out
- // so hide the expander and determine if we need it
- //mExpanderVisible = false;
- if (getTextPixelHeight() > getRect().getHeight())
- {
- showExpandText();
- }
- else
- {
- hideExpandText();
- }
- }
- void LLExpandableTextBox::LLTextBoxEx::showExpandText()
- {
- if (!mExpanderVisible)
- {
- // make sure we're scrolled to top when collapsing
- if (mScroller)
- {
- mScroller->goToTop();
- }
- // get fully visible lines
- std::pair<S32, S32> visible_lines = getVisibleLines(true);
- S32 last_line = visible_lines.second - 1;
- LLStyle::Params expander_style(getDefaultStyleParams());
- expander_style.font.style = "UNDERLINE";
- expander_style.color = LLUIColorTable::instance().getColor("HTMLLinkColor");
- LLExpanderSegment* expanderp = new LLExpanderSegment(new LLStyle(expander_style), getLineStart(last_line), getLength() + 1, mExpanderLabel, *this);
- insertSegment(expanderp);
- mExpanderVisible = true;
- }
- }
- //NOTE: obliterates existing styles (including hyperlinks)
- void LLExpandableTextBox::LLTextBoxEx::hideExpandText()
- {
- if (mExpanderVisible)
- {
- // this will overwrite the expander segment and all text styling with a single style
- LLStyleConstSP sp(new LLStyle(getDefaultStyleParams()));
- LLNormalTextSegment* segmentp = new LLNormalTextSegment(sp, 0, getLength() + 1, *this);
- insertSegment(segmentp);
- mExpanderVisible = false;
- }
- }
- S32 LLExpandableTextBox::LLTextBoxEx::getVerticalTextDelta()
- {
- S32 text_height = getTextPixelHeight();
- S32 textbox_height = getRect().getHeight();
- return text_height - textbox_height;
- }
- S32 LLExpandableTextBox::LLTextBoxEx::getTextPixelHeight()
- {
- return getTextBoundingRect().getHeight();
- }
- //////////////////////////////////////////////////////////////////////////
- //////////////////////////////////////////////////////////////////////////
- //////////////////////////////////////////////////////////////////////////
- LLExpandableTextBox::Params::Params()
- : textbox("textbox"),
- scroll("scroll"),
- max_height("max_height", 0),
- bg_visible("bg_visible", false),
- expanded_bg_visible("expanded_bg_visible", true),
- bg_color("bg_color", LLColor4::black),
- expanded_bg_color("expanded_bg_color", LLColor4::black)
- {
- }
- LLExpandableTextBox::LLExpandableTextBox(const Params& p)
- : LLUICtrl(p),
- mMaxHeight(p.max_height),
- mBGVisible(p.bg_visible),
- mExpandedBGVisible(p.expanded_bg_visible),
- mBGColor(p.bg_color),
- mExpandedBGColor(p.expanded_bg_color),
- mExpanded(false)
- {
- LLRect rc = getLocalRect();
- LLScrollContainer::Params scroll_params = p.scroll;
- scroll_params.rect(rc);
- mScroll = LLUICtrlFactory::create<LLScrollContainer>(scroll_params);
- addChild(mScroll);
- LLTextBoxEx::Params textbox_params = p.textbox;
- textbox_params.rect(rc);
- mTextBox = LLUICtrlFactory::create<LLTextBoxEx>(textbox_params);
- mScroll->addChild(mTextBox);
- updateTextBoxRect();
- mTextBox->setCommitCallback(boost::bind(&LLExpandableTextBox::onExpandClicked, this));
- }
- void LLExpandableTextBox::draw()
- {
- if(mBGVisible && !mExpanded)
- {
- gl_rect_2d(getLocalRect(), mBGColor.get(), TRUE);
- }
- if(mExpandedBGVisible && mExpanded)
- {
- gl_rect_2d(getLocalRect(), mExpandedBGColor.get(), TRUE);
- }
- collapseIfPosChanged();
- LLUICtrl::draw();
- }
- void LLExpandableTextBox::collapseIfPosChanged()
- {
- if(mExpanded)
- {
- LLView* parentp = getParent();
- LLRect parent_rect = parentp->getRect();
- parentp->localRectToOtherView(parent_rect, &parent_rect, getRootView());
- if(parent_rect.mLeft != mParentRect.mLeft
- || parent_rect.mTop != mParentRect.mTop)
- {
- collapseTextBox();
- }
- }
- }
- void LLExpandableTextBox::onExpandClicked()
- {
- expandTextBox();
- }
- void LLExpandableTextBox::updateTextBoxRect()
- {
- LLRect rc = getLocalRect();
- rc.mLeft += mScroll->getBorderWidth();
- rc.mRight -= mScroll->getBorderWidth();
- rc.mTop -= mScroll->getBorderWidth();
- rc.mBottom += mScroll->getBorderWidth();
- mTextBox->reshape(rc.getWidth(), rc.getHeight());
- mTextBox->setRect(rc);
- }
- S32 LLExpandableTextBox::recalculateTextDelta(S32 text_delta)
- {
- LLRect expanded_rect = getLocalRect();
- LLView* root_view = getRootView();
- LLRect window_rect = root_view->getRect();
- LLRect expanded_screen_rect;
- localRectToOtherView(expanded_rect, &expanded_screen_rect, root_view);
- // don't allow expanded text box bottom go off screen
- if(expanded_screen_rect.mBottom - text_delta < window_rect.mBottom)
- {
- text_delta = expanded_screen_rect.mBottom - window_rect.mBottom;
- }
- // show scroll bar if max_height is valid
- // and expanded size is greater that max_height
- else if(mMaxHeight > 0 && expanded_rect.getHeight() + text_delta > mMaxHeight)
- {
- text_delta = mMaxHeight - expanded_rect.getHeight();
- }
- return text_delta;
- }
- void LLExpandableTextBox::expandTextBox()
- {
- // hide "more" link, and show full text contents
- mTextBox->hideExpandText();
- // *HACK dz
- // hideExpandText brakes text styles (replaces hyper-links with plain text), see ticket EXT-3290
- // Set text again to make text box re-apply styles.
- // *TODO Find proper solution to fix this issue.
- // Maybe add removeSegment to LLTextBase
- mTextBox->setTextBase(mText);
- S32 text_delta = mTextBox->getVerticalTextDelta();
- text_delta += mTextBox->getVPad() * 2;
- text_delta += mScroll->getBorderWidth() * 2;
- // no need to expand
- if(text_delta <= 0)
- {
- return;
- }
- saveCollapsedState();
- LLRect expanded_rect = getLocalRect();
- LLRect expanded_screen_rect;
- S32 updated_text_delta = recalculateTextDelta(text_delta);
- // actual expand
- expanded_rect.mBottom -= updated_text_delta;
- LLRect text_box_rect = mTextBox->getRect();
- // check if we need to show scrollbar
- if(text_delta != updated_text_delta)
- {
- static LLUICachedControl<S32> scrollbar_size ("UIScrollbarSize", 0);
- // disable horizontal scrollbar
- text_box_rect.mRight -= scrollbar_size;
- // text box size has changed - redo text wrap
- // Should be handled automatically in reshape() below. JC
- //mTextBox->setWrappedText(mText, text_box_rect.getWidth());
- // recalculate text delta since text wrap changed text height
- text_delta = mTextBox->getVerticalTextDelta() + mTextBox->getVPad() * 2;
- }
- // expand text
- text_box_rect.mBottom -= text_delta;
- mTextBox->reshape(text_box_rect.getWidth(), text_box_rect.getHeight());
- mTextBox->setRect(text_box_rect);
- // expand text box
- localRectToOtherView(expanded_rect, &expanded_screen_rect, getParent());
- reshape(expanded_screen_rect.getWidth(), expanded_screen_rect.getHeight(), FALSE);
- setRect(expanded_screen_rect);
- setFocus(TRUE);
- // this lets us receive top_lost event(needed to collapse text box)
- // it also draws text box above all other ui elements
- gFocusMgr.setTopCtrl(this);
- mExpanded = true;
- }
- void LLExpandableTextBox::collapseTextBox()
- {
- if(!mExpanded)
- {
- return;
- }
- mExpanded = false;
- reshape(mCollapsedRect.getWidth(), mCollapsedRect.getHeight(), FALSE);
- setRect(mCollapsedRect);
- updateTextBoxRect();
- if(gFocusMgr.getTopCtrl() == this)
- {
- gFocusMgr.setTopCtrl(NULL);
- }
- }
- void LLExpandableTextBox::onFocusLost()
- {
- collapseTextBox();
- LLUICtrl::onFocusLost();
- }
- void LLExpandableTextBox::onTopLost()
- {
- collapseTextBox();
- LLUICtrl::onTopLost();
- }
- void LLExpandableTextBox::setValue(const LLSD& value)
- {
- collapseTextBox();
- mText = value.asString();
- mTextBox->setValue(value);
- }
- void LLExpandableTextBox::setText(const std::string& str)
- {
- collapseTextBox();
- mText = str;
- mTextBox->setText(str);
- }
- void LLExpandableTextBox::saveCollapsedState()
- {
- mCollapsedRect = getRect();
- mParentRect = getParent()->getRect();
- // convert parent rect to screen coordinates,
- // this will allow to track parent's position change
- getParent()->localRectToOtherView(mParentRect, &mParentRect, getRootView());
- }