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FormSpec: Add position and anchor elements (#5284)
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@ -1522,6 +1522,16 @@ examples.
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* `fixed_size`: `true`/`false` (optional)
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* deprecated: `invsize[<W>,<H>;]`
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#### `position[<X>,<Y>]`
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* Define the position of the formspec
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* A value between 0.0 and 1.0 represents a position inside the screen
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* The default value is the center of the screen (0.5, 0.5)
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#### `anchor[<X>,<Y>]`
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* Define the anchor of the formspec
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* A value between 0.0 and 1.0 represents an anchor inside the formspec
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* The default value is the center of the formspec (0.5, 0.5)
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#### `container[<X>,<Y>]`
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* Start of a container block, moves all physical elements in the container by (X, Y)
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* Must have matching container_end
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@ -1706,6 +1706,74 @@ bool GUIFormSpecMenu::parseSizeDirect(parserData* data, std::string element)
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return true;
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}
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bool GUIFormSpecMenu::parsePositionDirect(parserData *data, const std::string &element)
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{
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if (element.empty())
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return false;
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std::vector<std::string> parts = split(element, '[');
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if (parts.size() != 2)
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return false;
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std::string type = trim(parts[0]);
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std::string description = trim(parts[1]);
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if (type != "position")
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return false;
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parsePosition(data, description);
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return true;
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}
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void GUIFormSpecMenu::parsePosition(parserData *data, const std::string &element)
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{
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std::vector<std::string> parts = split(element, ',');
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if (parts.size() == 2) {
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data->offset.X = stof(parts[0]);
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data->offset.Y = stof(parts[1]);
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return;
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}
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errorstream << "Invalid position element (" << parts.size() << "): '" << element << "'" << std::endl;
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}
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bool GUIFormSpecMenu::parseAnchorDirect(parserData *data, const std::string &element)
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{
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if (element.empty())
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return false;
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std::vector<std::string> parts = split(element, '[');
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if (parts.size() != 2)
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return false;
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std::string type = trim(parts[0]);
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std::string description = trim(parts[1]);
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if (type != "anchor")
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return false;
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parseAnchor(data, description);
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return true;
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}
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void GUIFormSpecMenu::parseAnchor(parserData *data, const std::string &element)
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{
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std::vector<std::string> parts = split(element, ',');
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if (parts.size() == 2) {
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data->anchor.X = stof(parts[0]);
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data->anchor.Y = stof(parts[1]);
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return;
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}
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errorstream << "Invalid anchor element (" << parts.size() << "): '" << element << "'" << std::endl;
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}
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void GUIFormSpecMenu::parseElement(parserData* data, std::string element)
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{
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//some prechecks
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@ -1917,6 +1985,8 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
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mydata.size= v2s32(100,100);
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mydata.screensize = screensize;
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mydata.offset = v2f32(0.5f, 0.5f);
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mydata.anchor = v2f32(0.5f, 0.5f);
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// Base position of contents of form
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mydata.basepos = getBasePos();
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@ -1983,6 +2053,21 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
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}
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}
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/* "position" element is always after "size" element if it used */
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for (; i< elements.size(); i++) {
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if (!parsePositionDirect(&mydata, elements[i])) {
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break;
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}
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}
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/* "anchor" element is always after "position" (or "size" element) if it used */
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for (; i< elements.size(); i++) {
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if (!parseAnchorDirect(&mydata, elements[i])) {
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break;
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}
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}
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if (mydata.explicit_size) {
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// compute scaling for specified form size
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if (m_lock) {
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@ -2066,10 +2151,10 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
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padding.Y*2+spacing.Y*(mydata.invsize.Y-1.0)+imgsize.Y + m_btn_height*2.0/3.0
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);
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DesiredRect = mydata.rect = core::rect<s32>(
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mydata.screensize.X/2 - mydata.size.X/2 + offset.X,
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mydata.screensize.Y/2 - mydata.size.Y/2 + offset.Y,
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mydata.screensize.X/2 + mydata.size.X/2 + offset.X,
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mydata.screensize.Y/2 + mydata.size.Y/2 + offset.Y
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(s32)((f32)mydata.screensize.X * mydata.offset.X) - (s32)(mydata.anchor.X * (f32)mydata.size.X) + offset.X,
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(s32)((f32)mydata.screensize.Y * mydata.offset.Y) - (s32)(mydata.anchor.Y * (f32)mydata.size.Y) + offset.Y,
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(s32)((f32)mydata.screensize.X * mydata.offset.X) + (s32)((1.0 - mydata.anchor.X) * (f32)mydata.size.X) + offset.X,
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(s32)((f32)mydata.screensize.Y * mydata.offset.Y) + (s32)((1.0 - mydata.anchor.Y) * (f32)mydata.size.Y) + offset.Y
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);
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} else {
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// Non-size[] form must consist only of text fields and
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@ -2078,10 +2163,10 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
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m_font = g_fontengine->getFont();
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m_btn_height = font_line_height(m_font) * 0.875;
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DesiredRect = core::rect<s32>(
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mydata.screensize.X/2 - 580/2,
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mydata.screensize.Y/2 - 300/2,
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mydata.screensize.X/2 + 580/2,
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mydata.screensize.Y/2 + 300/2
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(s32)((f32)mydata.screensize.X * mydata.offset.X) - (s32)(mydata.anchor.X * 580.0),
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(s32)((f32)mydata.screensize.Y * mydata.offset.Y) - (s32)(mydata.anchor.Y * 300.0),
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(s32)((f32)mydata.screensize.X * mydata.offset.X) + (s32)((1.0 - mydata.anchor.X) * 580.0),
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(s32)((f32)mydata.screensize.Y * mydata.offset.Y) + (s32)((1.0 - mydata.anchor.Y) * 300.0)
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);
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}
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recalculateAbsolutePosition(false);
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@ -447,6 +447,8 @@ private:
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bool explicit_size;
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v2f invsize;
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v2s32 size;
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v2f32 offset;
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v2f32 anchor;
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core::rect<s32> rect;
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v2s32 basepos;
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v2u32 screensize;
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@ -502,6 +504,10 @@ private:
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bool parseVersionDirect(std::string data);
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bool parseSizeDirect(parserData* data, std::string element);
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void parseScrollBar(parserData* data, std::string element);
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bool parsePositionDirect(parserData *data, const std::string &element);
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void parsePosition(parserData *data, const std::string &element);
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bool parseAnchorDirect(parserData *data, const std::string &element);
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void parseAnchor(parserData *data, const std::string &element);
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void tryClose();
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